CN115110927B - Shaft cluster type underground gas storage method and device suitable for gas injection development mode and use method of device - Google Patents
Shaft cluster type underground gas storage method and device suitable for gas injection development mode and use method of device Download PDFInfo
- Publication number
- CN115110927B CN115110927B CN202110306748.4A CN202110306748A CN115110927B CN 115110927 B CN115110927 B CN 115110927B CN 202110306748 A CN202110306748 A CN 202110306748A CN 115110927 B CN115110927 B CN 115110927B
- Authority
- CN
- China
- Prior art keywords
- gas
- pipe
- well
- level
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002347 injection Methods 0.000 title claims abstract description 227
- 239000007924 injection Substances 0.000 title claims abstract description 227
- 238000003860 storage Methods 0.000 title claims abstract description 142
- 238000011161 development Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000009826 distribution Methods 0.000 claims description 103
- 238000004519 manufacturing process Methods 0.000 claims description 28
- 239000004568 cement Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000003129 oil well Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 528
- 239000003921 oil Substances 0.000 description 51
- 239000010410 layer Substances 0.000 description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000013461 design Methods 0.000 description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000009924 canning Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005380 natural gas recovery Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/03—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of several different products following one another in the same conduit, e.g. for switching from one receiving tank to another
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/01—Applications for fluid transport or storage
- F17C2270/0142—Applications for fluid transport or storage placed underground
- F17C2270/0144—Type of cavity
- F17C2270/0149—Type of cavity by digging cavities
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a shaft cluster type underground gas storage method and device suitable for a gas injection development mode and a use method of the device. The well bore cluster underground gas storage method suitable for the gas injection development mode comprises the steps of selecting at least one well group for gas storage, wherein the well group comprises at least two well bores, distributing and conveying gas of a gas source into the inner part of each well bore, and keeping each well bore closed. The shaft cluster type underground gas storage device suitable for the gas injection development mode can implement the method. According to the shaft cluster type underground gas storage method, device and using method of the device, which are suitable for the gas injection development mode, gas is stored by adopting the oil well shafts in the oil field, so that a sufficient storage space can be provided, and the problem of limited gas storage volume in the prior art is effectively solved.
Description
Technical Field
The invention relates to the technical field of oilfield development, in particular to a shaft cluster type underground gas storage device and method suitable for a gas injection development mode.
Background
The gas injection technology is focused on the development advantages of low permeability reservoirs, and the gas has the advantages of low seepage resistance, rapid formation energy supplement and the like.
And the gas injection development is adopted in the ultra-low permeability reservoir, if the formation cracks do not develop, a displacement system between the injection and production wells is difficult to establish, and the displacement pressure is too high. The corresponding method is throughput development, the throughput development mode requires that gas is continuously injected into a stratum ("swallow" process), and the gas enters small pores as much as possible in a well-choking pressure mode, so that a gas medium is fully contacted and exchanged with crude oil; the crude oil production is then carried through a rapid discharge of gas ("spitting" process). The throughput mode can greatly improve the gas injection oil extraction effect. Because of its strong ability to interact with crude oil, the throughput mode typically uses carbon dioxide as the gas injection medium.
In the hypotonic/medium-permeability oil reservoirs, gas injection development is adopted, and a gas drive mode is generally adopted to establish a displacement system between injection and production wells. Similar to the water injection system, the injection well injects gas and the production well in the well pattern produces oil.
The development mode of gas injection throughput can well improve the yield of crude oil, but has the greatest defects that: the utilization rate of the gas is very low and the cost is high. The exhaust gas is usually discharged into the atmosphere uncontrollably, and the produced oil is collected and transported after natural separation. The gas is discharged into the atmosphere rapidly and in large quantity, carbon dioxide poisoning of personnel and animals is easy to cause, and environmental protection management of greenhouse gas is not facilitated. If the gas injection medium is carbon dioxide, the cost loss of complete discharge is large.
At present, the carbon dioxide gas sources suitable for oilfield development in China are few, and a method for transporting liquefied carbon dioxide is generally adopted in test areas in huff-puff and gas drive modes and is stored in tank areas or injected into single wells. Due to the limited storage space, it is usually quantitatively replenished on the basis of satisfying the supply amount for several days. In the aspect of recycling, the gas-driven mode can separate and purify the recycled gas with a certain scale capacity, and is influenced by factors such as limited occupied area, high storage management difficulty and the like, and the canning capacity is generally 100m 3 ～200m 3 The gas-drive technology can realize rapid injection again after gas extraction by utilizing the capacity, and can ensure gas injection displacement to a certain extentAnd (5) circulating. But clearly the storage capacity is far from the requirements of reservoir gas injection development.
The gas storage requirement of the gas injection throughput mode is higher, and taking the development of a certain hypotonic block throughput as an example, the canning capacity required by the total throughput gas is calculated. Daily injection of CO 2 100 tons of gas are injected into a vertical injection well in a cumulative way, 1000 tons are injected into a horizontal well in a cumulative way, and 2000 tons are injected into a horizontal well in a cumulative way. If the container is canned and stored, 1000 tons of CO are stored under the conditions of normal temperature and pressure of 4MPa 2 The gas volume is about 5 ten thousand m 3 . A gas storage tank under the pressure condition, and the monomer volume is about 5m 3 A total of 10000 are required. Obviously, the scale is too large, and the gas injection throughput mode cannot be adopted in terms of occupation of land, pipeline design, control management and the like.
Therefore, how to solve the bottleneck of the storage volume limitation of the gas injection technology is a problem to be solved in the implementation of the current gas injection throughput development mode.
Disclosure of Invention
The invention aims to provide a shaft cluster type underground gas storage method, a device and a using method of the device, which are suitable for a gas injection development mode, and gas is stored by adopting a shaft, so that the problem of limited gas storage volume in the prior art is effectively solved.
In order to achieve the above purpose, the invention provides a wellbore cluster type underground gas storage method suitable for a gas injection development mode, wherein the wellbore cluster type underground gas storage method suitable for the gas injection development mode comprises the following steps:
step one: selecting at least one well group for gas storage, wherein the well group comprises at least two shafts;
step two: a gas distribution of a gas source is delivered to the interior of each of the wellbores and each of the wellbores is maintained closed.
The wellbore cluster underground gas storage method suitable for the gas injection development mode, as described above, wherein the step one includes:
selecting a set of said well groups for gas storage, said well groups comprising at least two of said wellbores; or alternatively
A plurality of sets of the well groups for gas storage are selected, each set of the well groups comprising a plurality of the wellbores.
The wellbore cluster underground gas storage method suitable for the gas injection development mode, as described above, wherein the second step comprises:
delivering a gas distribution of a gas source to each of said well groups;
delivering a gas source distribution to each of said well groups to each of said wellbores;
the gas source distributed to each of the wellbores is stored in the corresponding wellbore.
In order to achieve the above purpose, the invention also provides a shaft cluster type underground gas storage device suitable for the gas injection development mode, wherein the shaft cluster type underground gas storage device suitable for the gas injection development mode can implement the shaft cluster type underground gas storage method suitable for the gas injection development mode, and the shaft cluster type underground gas storage device suitable for the gas injection development mode comprises a control system and at least one group of well groups; each well group comprises a well group grade gas distribution device and at least two well shafts, each well shaft is communicated with the well group grade gas distribution device through a group of pipe groups, each well group grade gas distribution device is communicated with a gas source, and each well shaft and each well group grade gas distribution device are electrically connected with the control system.
The shaft cluster type underground gas storage device suitable for the gas injection development mode comprises a plurality of groups of shaft groups, wherein the shaft cluster type underground gas storage device suitable for the gas injection development mode further comprises a cluster-level gas distribution device; the well group level gas distribution devices of each well group are communicated with the cluster level gas distribution devices through a group of the pipe groups, the cluster level gas distribution devices are communicated with the gas source, and the cluster level gas distribution devices are electrically connected with the control system.
The shaft cluster type underground gas storage device suitable for the gas injection development mode comprises a first-stage gas inlet pipe, first-stage gas compressors, first-stage collecting pipes and first-stage outer conveying pipes, one end of the first-stage gas inlet pipe is communicated with a gas source or is communicated with the cluster type underground gas distribution device through a group of pipe groups, the other end of the first-stage gas inlet pipe is communicated with the first-stage collecting pipes, the first-stage gas compressors are arranged on the first-stage gas inlet pipe, each shaft is communicated with the first-stage collecting pipes through a group of pipe groups, one end of the first-stage outer conveying pipe is communicated with the first-stage collecting pipes, the other end of the first-stage outer conveying pipe is communicated with a target well group, and the first-stage gas compressors are electrically connected with the control system.
The shaft cluster type underground gas storage device suitable for the gas injection development mode, wherein the well group level gas distribution device further comprises a first gas injection standby pipe, one end of the first gas injection standby pipe is communicated with the primary outer conveying pipe, and the other end of the first gas injection standby pipe is communicated with a part of the primary gas inlet pipe, which is positioned between the primary gas compressor and the primary collecting pipe.
The shaft cluster type underground gas storage device suitable for the gas injection development mode, as described above, wherein the well group level gas distribution device further comprises a second gas injection standby pipe, one end of the second gas injection standby pipe is communicated with the primary collecting pipe, and the other end of the second gas injection standby pipe is communicated with a part of the primary gas inlet pipe, which is positioned between the primary gas compressor and the gas source or between the primary gas compressor and the cluster level gas distribution device.
The shaft cluster type underground gas storage device suitable for the gas injection development mode is characterized in that valves are arranged on the primary outer conveying pipe, the first gas injection standby pipe and the second gas injection standby pipe.
The shaft cluster type underground gas storage device suitable for the gas injection development mode comprises a secondary gas inlet pipe, a secondary gas compressor, a secondary collecting pipe and a secondary outer conveying pipe, one end of the secondary gas inlet pipe is communicated with a gas source, the other end of the secondary gas inlet pipe is communicated with the secondary collecting pipe, the secondary gas compressor is arranged on the secondary gas inlet pipe, each well group of the well group secondary gas distribution device is communicated with the secondary collecting pipe through a group of the well group, one end of the secondary outer conveying pipe is communicated with the secondary collecting pipe, the other end of the secondary outer conveying pipe is communicated with a target well group, a valve is arranged on the secondary outer conveying pipe, and the secondary gas compressor is electrically connected with the control system.
The shaft cluster type underground gas storage device suitable for the gas injection development mode comprises a first section, a second section and two parallel sections, wherein the two parallel sections are arranged in parallel, one end of the first section is communicated with the cluster-level gas distribution device or the well group-level gas distribution device, one end of the two parallel sections is communicated with the other end of the first section, the other end of the two parallel sections is communicated with one end of the second section, and the other end of the second section is communicated with the well group-level gas distribution device or the shaft.
The shaft cluster type underground gas storage device suitable for the gas injection development mode is characterized in that two parallel sections are respectively provided with a flow control valve, and the adjustment precision of the flow control valve on one parallel section is higher than that of the flow control valve on the other parallel section.
The shaft cluster type underground gas storage device suitable for the gas injection development mode, wherein the pressure resistance of the primary collecting pipe and the pressure resistance of the secondary collecting pipe are both larger than 30MPa.
The shaft cluster type underground gas storage device suitable for the gas injection development mode, wherein the primary collecting pipe and the secondary collecting pipe are uniformly provided with a plurality of pressure monitors and a plurality of safety valves, and the pressure monitors and the safety valves are electrically connected with the control system.
The wellbore cluster underground gas storage device suitable for the gas injection development mode, wherein the wellbore comprises a surface casing, a technical casing, an oil layer casing, an oil pipe and a wellhead device, wherein the oil layer casing is arranged at an oil layer, the inside of the oil layer casing is communicated with the oil layer, the upper end of the oil layer casing is communicated with the lower end of the technical casing, the upper end of the technical casing is communicated with the wellhead device, the surface casing is sleeved on the outer side of the upper part of the technical casing, the upper end of the surface casing reaches the ground and is connected with the wellhead device, the oil pipe penetrates through the technical casing and the inside of the oil layer casing, an annular space for gas storage is formed between the technical casing and the oil pipe, and the top of the annular space formed between the oil layer casing and the oil pipe is sealed so as to be separated from the annular space formed between the technical casing and the oil pipe.
The wellbore cluster type underground gas storage device suitable for the gas injection development mode is characterized in that the top of an annular space formed between the oil layer casing pipe and the oil pipe is blocked by cement or is blocked by a setting device.
The shaft cluster type underground gas storage device suitable for the gas injection development mode, as described above, wherein the target well group comprises at least one injection well and at least one production well, the primary outer conveying pipe and the secondary outer conveying pipe are respectively communicated with each injection well and each production well through a plurality of branch pipes, and each branch pipe is provided with a valve.
The shaft cluster type underground gas storage device suitable for the gas injection development mode, as described above, wherein each production well is communicated with a part of the primary gas inlet pipe, which is positioned between the primary gas compressor and the gas source or between the primary gas compressor and the cluster type gas distribution device, through one connecting pipe, and each connecting pipe is provided with a valve.
In order to achieve the above object, the present invention further provides a method for using the wellbore cluster type underground gas storage device suitable for the gas injection development mode, where the method for using the wellbore cluster type underground gas storage device suitable for the gas injection development mode includes:
selecting at least one well group for gas storage, wherein the well group comprises at least two shafts;
delivering a gas distribution of a gas source to the interior of each of said wellbores, and maintaining each of said wellbores closed;
Supplying the gas stored in the shaft to a target well group to perform gas injection development of an oil reservoir;
and after the gas injection development is completed, returning the gas supplied to the target well group into each shaft.
The method for using the shaft cluster type underground gas storage device suitable for the gas injection development mode comprises the following steps of:
distributing and conveying gas of a gas source to each well group through a cluster-level gas distribution device;
distributing and conveying the gas source distributed and conveyed to each well group to each well shaft through a well group grade gas distribution device;
pressurizing by the well group level gas distribution device, so that the gas distributed and conveyed to each well bore is stored in the corresponding well bore.
The method for using the shaft cluster type underground gas storage device suitable for the gas injection development mode, wherein each shaft is kept closed, and the method comprises the following steps:
cement is poured into an annular space between the reservoir sleeve and the oil pipe of the well shaft; or alternatively
Setting a setting tool at the top of an annular space between the casing and the tubing of the wellbore;
to close the bottom of the annular space between the technical sleeve and said tubing.
The method for using the wellbore cluster type underground gas storage device suitable for the gas injection development mode, as described above, wherein the supplying the gas stored in the wellbore to the target well group for gas injection development of the oil reservoir, and the reflowing the gas supplied to the target well group to each wellbore after the gas injection development is completed comprises:
supplying the gas stored in the shaft to an injection well of the target well group through a first-stage outer conveying pipe, or enabling the gas stored in the shaft to enter a first-stage air inlet pipe through a second air injection standby pipe and enter the first-stage outer conveying pipe along a first air injection standby pipe after being pressurized by a first-stage air compressor and then be supplied to the injection well of the target well group;
the injection well is closed for a preset time;
and discharging the gas injected into the injection well from the production well of the target well group, and enabling the gas discharged from the production well to flow back into each shaft along the primary outer conveying pipe or flow back into each shaft after being pressurized by the primary gas compressor along the primary air inlet pipe.
The method for using the shaft cluster type underground gas storage device suitable for the gas injection development mode is described above, wherein the preset time is greater than or equal to 10 days.
Compared with the prior art, the invention has the following advantages:
according to the shaft cluster type underground gas storage method, device and using method of the device, which are suitable for the gas injection development mode, gas is stored by adopting the oil well shafts in the oil field, so that a sufficient storage space can be provided, and the problem of limited gas storage volume in the prior art is effectively solved.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a flow chart of a method of wellbore clustered underground gas storage method suitable for gas injection development;
FIG. 2 is a schematic plan view of a wellbore clustered underground gas storage device suitable for gas injection development;
FIG. 3 is a schematic view of a longitudinal structure of a wellbore clustered underground gas storage device suitable for gas injection development;
FIG. 4 is a schematic plan view of a wellbore clustered underground gas storage device including clustered gas distribution devices suitable for gas injection development in accordance with the present invention;
FIG. 5 is a schematic diagram of a well group level gas distribution device of a wellbore cluster type underground gas storage device suitable for a gas injection development mode provided by the invention;
FIG. 6 is a schematic diagram of a cluster-level gas distribution device of a wellbore cluster-type underground gas storage device suitable for a gas injection development mode;
FIG. 7 is a schematic diagram of a specific structure of a primary manifold of a well group level gas distribution device of a wellbore cluster type underground gas storage device suitable for a gas injection development mode;
FIG. 8 is a schematic illustration of a wellbore configuration of a wellbore clustered underground gas storage device adapted for gas injection development in accordance with the present invention;
FIG. 9 is a schematic plan view of a target well group for gas injection using the wellbore clustered underground gas storage method or apparatus for gas injection development provided by the present invention;
FIG. 10 is a schematic view of a longitudinal structure of a target well group for gas injection using a wellbore clustered underground gas storage method or apparatus for gas injection development according to the present invention;
FIG. 11 is a flow chart of a method of using a wellbore clustered underground gas storage device suitable for gas injection development.
Reference numerals illustrate:
1. a well group;
11. a wellbore;
111. a surface layer sleeve;
112. a technical sleeve;
113. a reservoir sleeve;
114. an oil pipe;
115. a wellhead assembly;
12. well group grade gas distribution means;
121. A primary air inlet pipe;
122. a primary gas compressor;
123. a primary collection pipe;
1231. a pressure monitor;
1232. a safety valve;
1233. a void plate;
124. a primary outer conveying pipe;
125. a first gas injection reserve tube;
126. a second gas injection standby pipe;
127. a valve;
13. a branch pipe;
131. a valve;
14. a connecting pipe;
141. a valve;
2. cluster-level gas distribution means;
21. a secondary air inlet pipe;
22. a secondary gas compressor;
23. a secondary header;
231. a pressure monitor;
232. a safety valve;
24. a secondary outer conveying pipe;
25. a valve;
3. a gas source;
4. a tube group;
41. a first section;
42. parallel sections;
421. a fine flow valve;
422. a common high pressure valve;
43. a second section;
431. a valve;
5. a control system;
6. a target well group;
61. an injection well;
62. and (3) a production well.
Detailed Description
For a clearer understanding of the technical solutions, objects and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the present invention provides a wellbore cluster underground gas storage method suitable for a gas injection development mode, which comprises:
step one: selecting at least one well group for gas storage, wherein the well group comprises at least two shafts;
Step two: a gas distribution of a gas source is delivered to the interior of each well bore and each well bore is maintained closed.
Wherein:
the first step specifically comprises the following steps:
selecting a group of wells for gas storage, wherein the group of wells comprises at least two wellbores; or alternatively
Selecting a plurality of groups of well groups for gas storage, each group of well groups comprising a plurality of wellbores;
the number of well groups and the number of wellbores in each well group can be flexibly determined according to the distribution and the distance between the well groups, the distribution and the distance between the wellbores, the required storage space and the like, which are comprehensively considered, and the invention is not limited to the above;
step two, specifically include:
the gas distribution of the gas source is conveyed to each well group, the gas source distributed and conveyed to each well group is conveyed to each well shaft, when only one well group exists, the gas source is directly distributed to the well shafts, and when a plurality of well groups exist, the gas source is firstly distributed to each well group and then distributed to the well shafts;
the gas sources distributed to each well bore are stored in the corresponding well bore.
Compared with the prior art, the invention has the following advantages:
the shaft cluster type underground gas storage method suitable for the gas injection development mode provided by the invention has the advantages that the storage capacity is accumulated to be ultra-large, the bottleneck of the gas injection technology development is thoroughly solved by limiting the storage capacity in an adjustable mode, and the problems of floor storage occupation area, safety management and the like are also solved.
Example two
As shown in fig. 2 and fig. 3, the present invention further provides a wellbore cluster-type underground gas storage device suitable for a gas injection development mode, which can implement the wellbore cluster-type underground gas storage method suitable for the gas injection development mode according to the first embodiment, and the wellbore cluster-type underground gas storage device suitable for the gas injection development mode comprises a control system 5 and at least one group of well groups 1; each group of well groups 1 comprises a well group level gas distribution device 12 and at least two well bores 11, each well bore 11 is communicated with the well group level gas distribution device 12 through a group of pipe groups 4, each well group level gas distribution device 12 is communicated with a gas source 3, gas is distributed to each well bore 11 of the corresponding well group 1 by each well group level gas distribution device 12, each well bore 11 and each well group level gas distribution device 12 are electrically connected with the control system 5, and the control system 5 can control each well group level gas distribution device 12 to distribute gas to each well bore 11 and call of gas in each well bore 11, and meanwhile can monitor the gas storage condition of each well bore 11 and judge the gas storage capacity of each well bore 11.
Further, as shown in fig. 4, the wellbore cluster type underground gas storage device suitable for the gas injection development mode provided by the invention further comprises a cluster level gas distribution device 2 in a state that a plurality of groups of well groups 1 are arranged; the well group level gas distribution devices 12 of each well group 1 are all communicated with the cluster level gas distribution devices 2 through a group of pipe groups 4, and the cluster level gas distribution devices 2 are communicated with the gas source 3, namely, in the state that the well groups 1 are provided with a plurality of groups, the gas of the gas source 3 is firstly distributed to each well group level gas distribution device 12 through the cluster level gas distribution devices 2, then distributed to each well shaft 11 of the corresponding well group 1 through the well group level gas distribution devices 12, the cluster level gas distribution devices 2 are electrically connected with the control system 5, and the control system 5 can also control each cluster level gas distribution device 2 to distribute the gas to each well group 1.
In the invention, each well group 1 can keep the independence of the monomers, allows any number of combinations in a parallel mode to be expanded to the joint level of a plurality of well groups, and expands the capacity of the monomers when being used in combination, thereby effectively realizing underground large-capacity gas storage and solving the gas source guarantee problem which puzzles the expansion application of the gas injection technology.
Further, as shown in fig. 5, the wellbore cluster type underground gas storage device suitable for the gas injection development mode provided by the invention, wherein the well group level gas distribution device 12 comprises a level gas inlet pipe 121, a level gas compressor 122, a level collecting pipe 123 and a level outer conveying pipe 124, one end of the level gas inlet pipe 121 is communicated with a gas source 3 (only one group of well groups 1) or is communicated with the cluster level gas distribution device 2 through one group of pipe groups 4 (a plurality of groups 1 are arranged), the gas of the gas source 3 can directly enter the level gas inlet pipe 121 or indirectly through the cluster level gas distribution device 2, the other end of the level gas inlet pipe 121 is communicated with the level collecting pipe 123, the gas entering the level gas inlet pipe 121 enters the level collecting pipe 123 from the other end of the level gas inlet pipe 121, each well 11 enters the corresponding well group collecting pipe 123 through one group 4 and is stored in the corresponding well 11, the level gas compressor 122 is arranged on the gas inlet pipe, one end of the level outer conveying pipe 124 is communicated with the level collecting pipe 123, the other end of the level outer conveying pipe 124 is communicated with the well group collecting pipe 123, and the other end of the well group 124 can be reversely connected with the target collecting pipe 122, and the target system 5 can be controlled by the level controlling the well group 122, and the other end of the well group 122 can be reversely connected with the target system 5, and the target system can be controlled by the control and the well group 122.
Still further, as shown in fig. 5, the wellbore cluster type underground gas storage device suitable for the gas injection development mode provided by the invention, wherein the well group level gas distribution device 12 further comprises a first gas injection standby pipe 125, one end of the first gas injection standby pipe 125 is communicated with the first stage external transmission pipe 124, the other end of the first gas injection standby pipe 125 is communicated with a part of the first stage gas inlet pipe 121 located between the first stage gas compressor 122 and the first stage collecting pipe 123, and the gas of the gas source 3 can be directly pressurized and injected into the first stage external transmission pipe 124 through the first stage gas inlet pipe 121 and the first gas injection standby pipe 125 by arranging the first gas injection standby pipe 125 so as to be directly sent into the target well group.
Still further, as shown in fig. 5, the wellbore cluster type underground gas storage device suitable for the gas injection development mode provided by the invention, wherein the well group level gas distribution device 12 further comprises a second gas injection standby pipe 126, one end of the second gas injection standby pipe 126 is communicated with the primary collecting pipe 123, the other end of the second gas injection standby pipe 126 is communicated with a part of the primary gas inlet pipe 121, which is positioned between the primary gas compressor 122 and the gas source 3 or between the primary gas compressor 122 and the cluster level gas distribution device 2, and under the condition that the gas stored in the wellbore 11 is conveyed to the target well group for a certain time so as to balance the pressure, the gas stored in the wellbore 11 can enter the second gas injection standby pipe 126 from the primary collecting pipe 123 and enter the primary outer conveying pipe 124 along the primary gas inlet pipe 121 and the first gas injection standby pipe 125 after being pressurized by the primary gas compressor 122, so as to be conveyed to the target well group.
As shown in fig. 5, in the wellbore cluster-type underground gas storage device suitable for the gas injection development mode provided by the invention, valves 127 are respectively arranged on a first outer gas injection pipe 124, a first gas injection standby pipe 125 and a second gas injection standby pipe 126, the valves 127 on the first outer gas injection pipe 124 are arranged between the communication position between the first outer gas injection pipe 124 and the first gas injection standby pipe 125 and the communication position between the first outer gas injection pipe 124 and a first collecting pipe 123, when gas stored in a wellbore 11 is injected into a target well group through the first gas injection standby pipe 125 and the second gas injection standby pipe 126, the valves 127 on the first outer gas injection pipe 124 are closed to prevent the gas from entering the first outer gas injection standby pipe 125 from the first outer gas injection pipe 124 and then returning to the first collecting pipe 123 along the first outer gas injection pipe 124, and in addition, the valves 127 are also arranged on the gas inlet pipe 121 between the communication position between the second outer gas injection standby pipe 126 and the first gas inlet pipe 121 and a gas source 3, and likewise, when the gas stored in the wellbore 11 is injected into the target well group through the first gas injection standby pipe 125 and the second gas injection standby pipe 126, the valves 1 are closed from the first gas inlet pipe 121 and the end part 121; thus, the flow path of the gas can be flexibly switched by opening or closing the valves 127, so that the gas storage, the gas injection into the target well group and the gas flowing back to the gas storage shaft 11 can be smoothly realized.
Further, as shown in fig. 6, the wellbore cluster type underground gas storage device suitable for the gas injection development mode provided by the invention, wherein the cluster type gas distribution device 2 comprises a secondary gas inlet pipe 21, a secondary gas compressor 22, a secondary collecting pipe 23 and a secondary outer conveying pipe 24, one end of the secondary gas inlet pipe 21 is communicated with a gas source 3, the other end of the secondary gas inlet pipe 21 is communicated with the secondary collecting pipe 23, the secondary gas compressor 22 is arranged on the secondary gas inlet pipe 21, the well group level gas distribution devices 12 of each well group 1 are all communicated with the secondary collecting pipe 23 through a group pipe group 4, one end of the secondary outer conveying pipe 24 is communicated with the secondary collecting pipe 23, and the other end of the secondary outer conveying pipe 24 is communicated with a target well group 1, and the secondary gas compressor 22 is electrically connected with a control system 5, wherein the main component parts and the working principle of the cluster type gas distribution device 2 and the well group level gas distribution device 12 are all approximately the same, and a person skilled in the art can know about the cluster type gas distribution device 2 according to the specific content of the well group level gas distribution device 12, which is not disclosed herein;
the cluster-stage gas distribution device 2 may also be provided with a first gas injection standby pipe 125 and a second gas injection standby pipe 126, and used according to the application method of the first gas injection standby pipe 125 and the second gas injection standby pipe 126 in the well group-stage gas distribution device 12, and similarly, the second-stage gas inlet pipe 21 and the second-stage gas outlet pipe 24 may also be provided with valves 25 at the same positions on the first-stage gas inlet pipe 121 and the first-stage gas outlet pipe 124 to switch the flow paths of the gas flows, which is not described herein again.
The number of the cluster-level gas distribution devices 2 can be one or more, and the number and the distribution of the well groups 1 can be flexibly selected, so that the invention is not limited to the above.
As shown in fig. 5 and 6, the wellbore cluster-type underground gas storage device suitable for the gas injection development mode provided by the invention is preferable, wherein the pipe group 4 comprises a first section 41, a second section 43 and two parallel sections 42, the two parallel sections 42 are arranged in parallel, one end of the first section 41 is communicated with (a second-stage collecting pipe 23 of) the cluster-type gas distribution device 2 or (a first-stage collecting pipe 123 of) the well group-type gas distribution device 12, one end of each of the two parallel sections 42 is communicated with the other end of the first section 41, the other ends of the two parallel sections 42 are communicated with one end of the second section 43, and the other end of the second section 43 is communicated with the well group-type gas distribution device 12 or the wellbore 11;
the two parallel sections 42 are provided with flow control valves, and the adjustment precision of the flow control valve on one parallel section 42 is higher than that of the flow control valve on the other parallel section 42, specifically, one parallel section 42 is provided with a common high-pressure valve 422 to control the flow of a large flow of gas, the fluctuation range of the control pressure is larger, the other parallel section 42 is provided with a fine flow valve 421, the high seepage resistance is provided, the gas input/output pressure can be finely adjusted, and the two parallel sections 42 and the valve body arranged on the two parallel sections can be regarded as an integral gas flow control assembly; in addition, a valve 431 (a conventional high pressure valve) is provided at the second end to control the start or stop of gas flow into the wellbore 11.
Preferably, the wellbore cluster type underground gas storage device suitable for the gas injection development mode provided by the invention is characterized in that the pressure resistance of the primary collecting pipe 123 and the pressure resistance of the secondary collecting pipe 23 are both greater than 30MPa, the inner diameters of the primary collecting pipe 123 and the secondary collecting pipe 23 are both greater than the inner diameter of the access pipe group 4 of the wellbore 11 and the inner diameters of the corresponding primary outer conveying pipe 124 and secondary outer conveying pipe 24, so that when a target well group is rapidly exhausted (the wellbore 11 is used for gas storage), the primary collecting pipe 123 and the primary secondary collecting pipe 23 do not increase extra resistance.
As shown in fig. 5 and 7, in the wellbore cluster-type underground gas storage device suitable for gas injection development, the primary collecting pipe 123 is provided with a plurality of pressure monitors 1231 and a plurality of safety valves 1232, the secondary collecting pipe 23 is also provided with a plurality of pressure monitors 231 and a plurality of safety valves 232, and each pressure monitor 1231, each pressure monitor 231, each safety valve 1232 and each safety valve 232 are electrically connected with the control system 5 so as to monitor the pressure in the primary collecting pipe 123 and the secondary collecting pipe 23 in real time, and the control system 5 controls the safety valves 1232 and the safety valves 232 to be opened for pressure relief when the pressure is excessive; and the two sides of the connection part between the second gas injection standby pipe 126 and the first collecting pipe 123 inside the first collecting pipe 123 are respectively provided with a pore plate 1233 for stabilizing the pressure of the gas flowing through.
Further, as shown in fig. 8, the wellbore cluster underground gas storage device suitable for the gas injection development mode provided by the invention, wherein the wellbore 11 comprises a surface casing 111, a technical casing 112, an oil casing 113, an oil pipe 114 and a wellhead device 115, the oil casing 113 is arranged at the oil layer, the inside of the oil casing 113 is communicated with the oil layer, the upper end of the oil casing 113 is communicated with the lower end of the technical casing 112, the upper end of the technical casing 112 is communicated with the wellhead device 115 to the ground, the surface casing 111 is sleeved outside the upper part of the technical casing 112, the upper end of the surface casing 111 reaches the ground and is connected with the wellhead device 115, or the upper end of the technical casing 112 can be communicated with the lower end of the surface casing 111, the oil pipe 114 is arranged inside the technical casing 112 and the oil casing 113 in a penetrating manner, an annular space for gas storage is formed between the technical casing 112 and the oil pipe 114, in order to ensure good gas storage and storage capacity of the wellbore 11, each wellbore 11 is sealed at the oil layer position, that is prevented from leaking along the oil layer, that is, the top of the annular space formed between the oil casing 113 and the oil pipe 114 is sealed to separate from the annular space formed between the technical casing 112 and the oil pipe 114, the well 11 can be a short-term or a well-cut off well.
Wherein, the surface sleeve 111 is mainly installed on the surface soil layer and the lower loose rock layer to prevent stratum collapse; the technical casing 112 is located at the normal rock layer part, is the main part in the shaft 11, and has a length of about 90% of the total length of the shaft 11; the oil layer sleeve 113 is arranged at the oil layer part to protect the oil layer from collapsing, prevent sand from being discharged greatly, and the like; tubing 114 is a string that performs injection and production functions; wellhead 115 is the general control foundation for wellbore 11, and surface casing 111, technical casing 112, and tubing 114 are connected to wellhead 115 and controlled by valves.
Wherein the top of the annular space formed between the casing 113 and the tubing 114 is closed off by cement or by a setting tool.
Further, as shown in fig. 9 and 10, the well bore cluster underground gas storage device suitable for the gas injection development mode provided by the invention, wherein the target well group 6 comprises at least one injection well 61 and at least one production well 62, the primary outer conveying pipe 124 and the secondary outer conveying pipe 24 are respectively communicated with each injection well 61 and each production well 62 through a plurality of branch pipes 13 so as to inject gas into all the well bores in the target well group 6, and when the gas in the target well group 6 needs to be discharged after the gas injection operation is completed, the gas can flow back to the primary outer conveying pipe 124 or the secondary outer conveying pipe 24 along each branch pipe 13 so as to be stored in the well bore 11 again, and each branch pipe 13 is provided with a valve 131 so as to independently control the gas injection operation and the stopping and starting of the gas backflow of each well bore.
The target well group 6 is formed by arranging injection wells 61 and production wells 62 in a certain manner, taking the simplest five-point well pattern as an example (see fig. 9), the four corners of a square are the production wells 62, and the center is the injection well 61. The in-plane production well 62 is typically in the range of 100m to 200m from the injection well 61; while from a longitudinal section (see fig. 10), production wells 62 in the pattern are connected to the bottom of injection well 61 by reservoirs to maintain connectivity.
As shown in fig. 5, in the wellbore cluster type underground gas storage device suitable for the gas injection development mode provided by the invention, each production well 62 is communicated with a part of a primary gas inlet pipe 121, which is positioned between a primary gas compressor 122 and a gas source 3 or between the primary gas compressor 122 and a cluster type gas distribution device 2, through one connecting pipe 14, each connecting pipe 14 is provided with a valve 141, when gas is discharged from a target well group 6 and flows back into a wellbore 11 along a branch pipe 13 to the pressure balance, the valve 131 on each branch pipe 13 can be closed, and the valve 141 on each connecting pipe 14 is opened, so that the residual gas in the target well group 6 flows back into the wellbore 11 after being pressurized by the primary gas compressor 122.
Specifically, compared with a ground canning device, the gas storage device provided by the invention has the characteristics that the inner diameter of the shaft 11 is small, the length is particularly long, and the pressure resistance is high; the diameter of the existing canning device can reach 1500mm at maximum, the length is 10m, and the pressure resistance is 5MPa at maximum (the parameter is the highest value of various can parameters); the maximum inner diameter of the surface casing 111 in the prior art is not more than 330mm, the length of a vertical well is usually more than 2000m, a Xinjiang oil reservoir is usually not less than 3000m, and the average pressure resistance of a well bore 11 is usually not less than 20MPa, so that the well bore 11 is used as a space for storing gas, has the advantages of high pressure resistance and large gas storage capacity, and has an effective space of about 90m according to well bore 11 parameters with the well depth of 3000m and the inner diameter of 200mm of the technical casing 112 3 The lowest bearing position (wellhead position) of the shaft 11 is calculated according to the pressure resistance of 20MPa, and the stored gas volume can reach 27000Nm 3 (average pressure in wellbore 11 is 30 MPa).
The air source 3 in the invention can be the air which is transported by a canned transport vehicle and is in liquid CO 2 Is typical; or the gas generated by the gas preparation device, typically nitrogen; but also gas conveyed by a gas pipeline, and is typified by natural gas recovery, and the invention is not limited thereto.
Compared with the prior art, the invention has the following advantages:
1. according to the shaft cluster type underground gas storage device suitable for the gas injection development mode, the practical conditions of gas injection modes such as gas flooding, throughput and the like are combined, the shaft cluster type underground gas storage device is built by using the full shaft capable of storing gas at high pressure, the pressure limit is increased from not higher than 5MPa to the reservoir pressure condition, and the volume of the standard gas stored in the equal volume is greatly increased;
2. the shaft cluster type underground gas storage device suitable for the gas injection development mode provided by the invention not only meets the gas storage function of the gas injection mode, so that the design of the gas injection scheme is more scientific, but also meets the high-speed flow rate condition of the 'spitting' stage in the throughput mode, the development effect is improved, the cost of compressed gas is obviously reduced compared with the cost of gas (such as the cost of collection, purification, transportation, compression and the like) in a normal state, a great amount of gas resources and production cost can be saved by effectively utilizing the discharged gas, and the reduced discharge is beneficial to environmental protection;
3. The well shaft cluster type underground gas storage device suitable for the gas injection development mode is a convertible application to an injection well/a production well, the original well shaft structure and configuration are not changed, and the injection or production functions are also fully reserved; by means of special devices, the combination in quantity is flexibly carried out according to the design scheme of gas injection, and the characteristic of clusters is exerted.
Example III
As shown in fig. 11, the present invention further provides a method for using the wellbore cluster type underground gas storage device suitable for the gas injection development mode according to the second embodiment, where the method for using the wellbore cluster type underground gas storage device suitable for the gas injection development mode includes:
selecting at least one well group for gas storage, wherein the well group comprises at least two shafts;
delivering a gas distribution of a gas source to the interior of each well bore and maintaining each well bore closed;
supplying the gas stored in the shaft to a target well group to perform gas injection development of the oil reservoir;
and after the gas injection development is completed, returning the gas supplied to the target well group into each well bore.
Wherein:
delivering a gas distribution of a gas source to the interior of each wellbore includes:
distributing and conveying gas of a gas source to each well group through a cluster-level gas distribution device;
Distributing and conveying the gas source distributed and conveyed to each well group to each well shaft through a well group grade gas distribution device;
the gas distributed and delivered to each well bore is stored in the corresponding well bore by pressurization of the well group level gas distribution device.
Keeping each wellbore closed includes:
cement is poured into an annular space between the oil layer casing pipe and the oil pipe of the well shaft; or alternatively
Setting a setting device at the top of an annular space between a reservoir casing and an oil pipe of a well bore;
to close the bottom of the annular space between the technical casing and the tubing, preventing gas loss along the reservoir.
Supplying the gas stored in the well bore to the target well group, developing the gas injection of the oil reservoir, and after the gas injection development is completed, refluxing the gas supplied to the target well group to each well bore comprises:
supplying the gas stored in the shaft to the injection well of the target well group through a first-stage outer conveying pipe, or enabling the gas stored in the shaft to enter a first-stage air inlet pipe through a second air injection standby pipe and enter the first-stage outer conveying pipe along a first air injection standby pipe after being pressurized by a first-stage air compressor and then be supplied to the injection well of the target well group;
closing the injection well for a preset time which is more than or equal to 10 days;
And discharging the gas injected into the injection well from the production well of the target well group, and enabling the gas discharged from the production well to flow back into each shaft along the primary outer conveying pipe or flow back into each shaft after being pressurized by the primary gas compressor along the primary air inlet pipe.
The method for using the shaft cluster type underground gas storage device suitable for the gas injection development mode is illustrated in detail as follows:
(1) Preparation work
The primary collecting pipes and the pipe groups connected with the corresponding wellbores and the secondary collecting pipes and the pipe groups connected with the corresponding well group-level gas distribution devices can be integrated into a whole and arranged in a skid-mounted mode, so that the wellbores can be flexibly arranged.
And according to the requirements of the oil reservoir development scheme, configuring corresponding well group-level gas distribution devices and/or cluster-level gas distribution devices according to the selected well groups.
The well bore, the first-stage collecting pipe, the first-stage gas compressor, the first-stage outer conveying pipe, the first-stage gas inlet pipe, the first gas injection standby pipe and the second gas injection standby pipe are connected to form a complete well group (and a well group-level device).
The well groups are then connected (forming a cluster-level system).
(2) Workflow process
The following is CO 2 The throughput gas injection mode is taken as an example, and the working flow of the well group is introduced.
Setting the shaft to be in an initial empty state and CO at the initial stage 2 And 2 tons of canned vehicles are transported by transportation supply every vehicle number. The scheme is as follows: daily injection of CO 2 100 tons of gas are injected into a vertical injection shaft for 1000 tons of CO at normal temperature and pressure of 4MPa, and 1000 tons of CO are injected into the vertical injection shaft 2 The gas volume was about 5 Nm 3 . After 10 days of well stuffiness, the gas was rapidly exhausted at maximum speed.
A selective shaft is arranged, and the effective space of single gas storage is about 90m 3 . The volume of stored gas can reach 27000Nm calculated by average pressure in a shaft of 30MPa 3 . Namely: the gas storage amount of the three-hole shaft can meet the requirement, and if the number of the shaft is sufficient, an average storage mode can be adopted to reduce the pressure in the shaft.
(1) Gas storage process from tank truck gas storage tank to shaft
a. All valves between each shaft and a tank truck gas storage tank (gas source) are opened, and gas in the tank enters the shaft by means of high pressure of the gas in the tank until the pressure is balanced;
b. starting a primary gas compressor, pressing residual gas in a tank truck gas storage tank into a shaft until the gas pressure in the tank falls to the gas pressure limit of an inlet of the primary compressor;
c. and replacing the tank truck, and repeating the process until the gas storage volume of the shaft meets the design. Three holes are arranged in the shaft to store 1000 tons of CO 2 。
(2) A process of injecting gas stored in a wellbore into a target well group (a "swallow" process)
a. Opening all valves from one shaft to a first-stage external conveying pipe, enabling gas in the shaft to enter an injection well of a target well group by means of high pressure, and controlling the flow by using a (fine) flow control valve with higher adjustment precision on one parallel section on the pipe group connected with the shaft if the flow exceeds a daily injection design;
b. when the pressure in the shaft is reduced to the pressure which cannot meet the daily injection quantity, a gas flow route is changed, so that gas is injected through the first gas injection standby pipe and the second gas injection standby pipe, at the moment, a primary gas compressor is started, and the residual gas in the shaft is pressed into an injection well of a target well group;
c. and after the gas in the shaft is low to the design value, starting a second shaft until the requirement of 1000 tons of total injection amount is met.
(3) Process of rapidly discharging and storing gas in target well group into well bore (process of "spitting")
After 10 days of well sealing, 1000 tons of CO in the target well group 2 The gas is discharged at the maximum flow rate, and the gas is completely discharged in the conventional method, so that the waste is avoided, and the environmental pollution risk exists.
a. All valves between each well bore and the target well group are opened, and gas in the target well group enters each well bore by means of high pressure of the gas until the pressure is balanced; in the process, whether oil flows are produced is monitored, if so, the emptying speed is reduced, and crude oil is collected.
b. And starting a primary gas compressor to press residual gas in the target well group into each well shaft.
In the form of CO 2 The throughput is calculated four times, only one gas source is used, 3000 tons are saved compared with the conventional method, and the gas after four times is still in a storage state.
The above workflow shows great advantages of the present invention.
Compared with the prior art, the invention has the following advantages:
according to the shaft cluster type underground gas storage method, device and using method of the device, which are suitable for the gas injection development mode, gas is stored by adopting the oil well shafts in the oil field, so that a sufficient storage space can be provided, and the problem of limited gas storage volume in the prior art is effectively solved.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (17)
1. The well shaft cluster type underground gas storage device suitable for the gas injection development mode is characterized by being capable of implementing a well shaft cluster type underground gas storage method, and comprises a control system and at least one group of well groups; each well group comprises a well group grade gas distribution device and at least two well shafts, each well shaft is communicated with the well group grade gas distribution device through a group of pipe groups, each well group grade gas distribution device is communicated with a gas source, and each well shaft and each well group grade gas distribution device are electrically connected with the control system;
In the state that the well group is provided with a plurality of groups, the shaft cluster type underground gas storage device suitable for the gas injection development mode further comprises a cluster type gas distribution device; the well group level gas distribution device of each well group is communicated with the cluster level gas distribution device through a group of the pipe groups, the cluster level gas distribution device is communicated with the gas source, and the cluster level gas distribution device is electrically connected with the control system;
the well group level gas distribution device comprises a level gas inlet pipe, a level gas compressor, a level collecting pipe and a level outer conveying pipe, one end of the level gas inlet pipe is communicated with the gas source or is communicated with the cluster level gas distribution device through a group of pipe groups, the other end of the level gas inlet pipe is communicated with the level collecting pipe, the level gas compressor is arranged on the level gas inlet pipe, each shaft is communicated with the level collecting pipe through a group of pipe groups, one end of the level outer conveying pipe is communicated with the level collecting pipe, the other end of the level outer conveying pipe is communicated with a target well group, and the level gas compressor is electrically connected with the control system;
The cluster-type gas distribution device comprises a second-level gas inlet pipe, second-level gas compressors, second-level collecting pipes and second-level outer conveying pipes, one end of the second-level gas inlet pipe is communicated with a gas source, the other end of the second-level gas inlet pipe is communicated with the second-level collecting pipes, the second-level gas compressors are arranged on the second-level gas inlet pipe, each well group of the well group-type gas distribution device is communicated with the second-level collecting pipes through a group of the pipe groups, one end of the second-level outer conveying pipes is communicated with the second-level collecting pipes, the other end of the second-level outer conveying pipes is communicated with a target well group, and a valve is arranged on the second-level outer conveying pipes and is electrically connected with the control system.
2. The wellbore clustered underground gas storage device suitable for gas injection development as set forth in claim 1, wherein the well group stage gas distribution device further comprises a first gas injection backup pipe, one end of the first gas injection backup pipe is communicated with the primary external pipe, and the other end of the first gas injection backup pipe is communicated with a portion of the primary gas inlet pipe located between the primary gas compressor and the primary collecting pipe.
3. The wellbore clustered underground gas storage device suitable for gas injection development as set forth in claim 2, wherein the well group stage gas distribution device further comprises a second gas injection backup pipe, one end of the second gas injection backup pipe is communicated with the primary collecting pipe, and the other end of the second gas injection backup pipe is communicated with a portion of the primary gas inlet pipe located between the primary gas compressor and the gas source or between the primary gas compressor and the clustered stage gas distribution device.
4. The wellbore clustered underground gas storage device suitable for the gas injection development mode according to claim 3, wherein valves are arranged on the primary external transmission pipe, the first gas injection standby pipe and the second gas injection standby pipe.
5. The wellbore clustered underground gas storage device suitable for the gas injection development mode according to claim 1, wherein the tube group comprises a first section, a second section and two parallel sections, the two parallel sections are arranged in parallel, one end of the first section is communicated with the clustered grade gas distribution device or the well group grade gas distribution device, one ends of the two parallel sections are communicated with the other end of the first section, the other ends of the two parallel sections are communicated with one end of the second section, and the other end of the second section is communicated with the well group grade gas distribution device or the wellbore.
6. The wellbore clustered underground gas storage device suitable for the gas injection development mode according to claim 5, wherein flow control valves are arranged on two parallel sections, and the adjustment precision of the flow control valve on one parallel section is higher than that of the flow control valve on the other parallel section.
7. The wellbore clustered underground gas storage device suitable for the gas injection development mode according to claim 1, wherein the pressure resistance of the primary collecting pipe and the secondary collecting pipe is greater than 30MPa.
8. The wellbore clustered underground gas storage device suitable for the gas injection development mode according to claim 1, wherein the primary collecting pipe and the secondary collecting pipe are uniformly provided with a plurality of pressure monitors and a plurality of safety valves, and each pressure monitor and each safety valve are electrically connected with the control system.
9. The wellbore clustered underground gas storage device suitable for gas injection development mode according to claim 1, wherein the wellbore comprises a surface casing, a technical casing, an oil pipe and a wellhead device, the oil casing is arranged at the oil layer, the inside of the oil casing is communicated with the oil layer, the upper end of the oil casing is communicated with the lower end of the technical casing, the upper end of the technical casing is communicated with the wellhead device through the ground, the surface casing is sleeved on the outer side of the upper part of the technical casing, the upper end of the surface casing reaches the ground and is connected with the wellhead device, the oil pipe penetrates through the technical casing and the inside of the oil casing, an annular space for gas storage is formed between the technical casing and the oil pipe, and the top of the annular space formed between the oil casing and the oil pipe is sealed so as to be separated from the annular space formed between the technical casing and the oil pipe.
10. The wellbore clustered underground gas storage device suitable for gas injection development of claim 9 wherein the top of the annular space formed between the casing and the tubing is closed off by cement or by a setting tool.
11. The wellbore clustered underground gas storage device suitable for the gas injection development mode according to claim 1, wherein the target well group comprises at least one injection well and at least one production well, the primary external conveying pipe and the secondary external conveying pipe are respectively communicated with each injection well and each production well through a plurality of branch pipes, and each branch pipe is provided with a valve.
12. The shaft clustered underground gas storage device suitable for the gas injection development mode according to claim 11, wherein each production well is communicated with a part of the primary gas inlet pipe, which is positioned between the primary gas compressor and the gas source or between the primary gas compressor and the clustered gas distribution device, through a connecting pipe, and each connecting pipe is provided with a valve.
13. A method of using a wellbore clustered underground gas storage device adapted for gas injection development as defined in any one of claims 1 to 12, wherein the method of using a wellbore clustered underground gas storage device adapted for gas injection development comprises:
Selecting at least one well group for gas storage, wherein the well group comprises at least two shafts;
delivering a gas distribution of a gas source to the interior of each of said wellbores, and maintaining each of said wellbores closed;
supplying the gas stored in the shaft to a target well group to perform gas injection development of an oil reservoir;
and after the gas injection development is completed, returning the gas supplied to the target well group into each shaft.
14. The method of claim 13, wherein delivering the gas distribution of the gas source to the interior of each of the wellbores comprises:
distributing and conveying gas of a gas source to each well group through a cluster-level gas distribution device;
distributing and conveying the gas source distributed and conveyed to each well group to each well shaft through a well group grade gas distribution device;
pressurizing by the well group level gas distribution device, so that the gas distributed and conveyed to each well bore is stored in the corresponding well bore.
15. A method of using a clustered underground gas storage device adapted for use in gas injection development according to claim 13, wherein maintaining each of the wellbores closed comprises:
Cement is poured into an annular space between the reservoir sleeve and the oil pipe of the well shaft; or alternatively
Setting a setting tool at the top of an annular space between the casing and the tubing of the wellbore;
to close the bottom of the annular space between the technical sleeve and said tubing.
16. The method of claim 13, wherein supplying the gas stored in the well to the target well group for gas injection development of the reservoir, and returning the gas supplied to the target well group to each well after the gas injection development is completed, comprises:
supplying the gas stored in the shaft to an injection well of the target well group through a first-stage outer conveying pipe, or enabling the gas stored in the shaft to enter a first-stage air inlet pipe through a second air injection standby pipe and enter the first-stage outer conveying pipe along a first air injection standby pipe after being pressurized by a first-stage air compressor and then be supplied to the injection well of the target well group;
the injection well is closed for a preset time;
and discharging the gas injected into the injection well from the production well of the target well group, and enabling the gas discharged from the production well to flow back into each shaft along the primary outer conveying pipe or flow back into each shaft after being pressurized by the primary gas compressor along the primary air inlet pipe.
17. The method of using a clustered underground gas storage device in a wellbore suitable for gas injection development of claim 16, wherein the predetermined time is greater than or equal to 10 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306748.4A CN115110927B (en) | 2021-03-23 | 2021-03-23 | Shaft cluster type underground gas storage method and device suitable for gas injection development mode and use method of device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110306748.4A CN115110927B (en) | 2021-03-23 | 2021-03-23 | Shaft cluster type underground gas storage method and device suitable for gas injection development mode and use method of device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115110927A CN115110927A (en) | 2022-09-27 |
| CN115110927B true CN115110927B (en) | 2024-03-26 |
Family
ID=83324188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110306748.4A Active CN115110927B (en) | 2021-03-23 | 2021-03-23 | Shaft cluster type underground gas storage method and device suitable for gas injection development mode and use method of device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115110927B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2024967A1 (en) * | 1969-06-02 | 1970-12-17 | Texaco Development Corp., New York, N.Y. (V.St.A.) | Storage system for underground storage of a liquid hydrocarbon product |
| CN101475099A (en) * | 2008-11-24 | 2009-07-08 | 杜志刚 | Method for storing carbon dioxide in abandoned mine |
| CN201671605U (en) * | 2009-12-16 | 2010-12-15 | 中国石油天然气集团公司 | Injection-production simulator for depleted oil-gas reservoir and aquifer gas storage |
| CN103089306A (en) * | 2011-11-03 | 2013-05-08 | 大港油田集团有限责任公司 | Method for constructing underground gas storage by depleted oil-gas reservoir |
| CN104879167A (en) * | 2015-04-27 | 2015-09-02 | 中国石油天然气股份有限公司 | Method for rebuilding gas storage reservoir and layered injection and recovery system |
| WO2015178899A1 (en) * | 2014-05-21 | 2015-11-26 | Shell Oil Company | Method and system for enhancing natural gas production |
| CN111886191A (en) * | 2018-03-19 | 2020-11-03 | 清洁科技地质力学有限公司 | System and method for storing compressed air energy |
-
2021
- 2021-03-23 CN CN202110306748.4A patent/CN115110927B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2024967A1 (en) * | 1969-06-02 | 1970-12-17 | Texaco Development Corp., New York, N.Y. (V.St.A.) | Storage system for underground storage of a liquid hydrocarbon product |
| CN101475099A (en) * | 2008-11-24 | 2009-07-08 | 杜志刚 | Method for storing carbon dioxide in abandoned mine |
| CN201671605U (en) * | 2009-12-16 | 2010-12-15 | 中国石油天然气集团公司 | Injection-production simulator for depleted oil-gas reservoir and aquifer gas storage |
| CN103089306A (en) * | 2011-11-03 | 2013-05-08 | 大港油田集团有限责任公司 | Method for constructing underground gas storage by depleted oil-gas reservoir |
| WO2015178899A1 (en) * | 2014-05-21 | 2015-11-26 | Shell Oil Company | Method and system for enhancing natural gas production |
| CN104879167A (en) * | 2015-04-27 | 2015-09-02 | 中国石油天然气股份有限公司 | Method for rebuilding gas storage reservoir and layered injection and recovery system |
| CN111886191A (en) * | 2018-03-19 | 2020-11-03 | 清洁科技地质力学有限公司 | System and method for storing compressed air energy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115110927A (en) | 2022-09-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7281593B2 (en) | Method for the circulation of gas when drilling or working a well | |
| CN100447372C (en) | Shallow drill assembly with separate jet pump | |
| CN108374655B (en) | Liquid carbon dioxide dry sand fracturing system and technological process | |
| CN108019190B (en) | Full-closed mixed transportation depressurization circulating gas lift system | |
| CN112878972B (en) | Liquid nitrogen pulse fracturing system and fracturing method | |
| CN113250670B (en) | Single-hole multi-section synchronous control fracturing coal body permeability increasing system and method | |
| CN106769215A (en) | A kind of device and method for fetching water for continuously acquiring drilling water sample in situ | |
| CN112145145A (en) | Supercritical carbon dioxide sand-carrying fracturing coal bed device and method | |
| CN113338927B (en) | Device based on liquid nitrogen-ice particle composite fracturing and method for breaking coal rock mass | |
| CN106917613A (en) | Oilfield liquids carbon dioxide injection device and method for implanting | |
| CN116557067B (en) | Pressure balance compensation device and method for gas production process of communicated well salt cavern gas storage | |
| CN115110927B (en) | Shaft cluster type underground gas storage method and device suitable for gas injection development mode and use method of device | |
| CN106677756B (en) | A kind of coal petrography softening active fracturing device and coal petrography pressing crack construction technique | |
| CN106287202A (en) | A kind of storage tank reclaims BOG without discharge LNG aerator and method | |
| CN113738326B (en) | Carbon dioxide anhydrous sand fracturing system and method | |
| CN111980649B (en) | Horizontal well low-temperature fluid enhanced heat exchange fracturing method | |
| CN111894543A (en) | Liquid carbon dioxide anhydrous fracturing normal-pressure sand adding method and device | |
| CN108302324B (en) | Liquid carbon dioxide energized fracturing system and process flow | |
| CN2416338Y (en) | Natural gas small-district supplying & storing gas apparatus | |
| CN115111519B (en) | Full-shaft gas storage device suitable for throughput development mode and application method thereof | |
| CN108590512A (en) | A kind of flammable ice-cold drilling method and device | |
| CN107053457A (en) | Shield pulping equipment and its pulping process | |
| CN206812202U (en) | Shield pulping equipment | |
| CN206477835U (en) | Pressure break mixing device and apply its sand blender | |
| CN114198070B (en) | Composite gas-driven oil displacement method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |