CN105422057A - Oil extraction method for ultra-low permeability oil reservoir or compact oil reservoir - Google Patents
Oil extraction method for ultra-low permeability oil reservoir or compact oil reservoir Download PDFInfo
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- CN105422057A CN105422057A CN201511032333.3A CN201511032333A CN105422057A CN 105422057 A CN105422057 A CN 105422057A CN 201511032333 A CN201511032333 A CN 201511032333A CN 105422057 A CN105422057 A CN 105422057A
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- 230000035699 permeability Effects 0.000 title claims abstract description 41
- 238000000605 extraction Methods 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 169
- 238000004519 manufacturing process Methods 0.000 claims description 28
- 239000010779 crude oil Substances 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000003129 oil well Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 239000009096 changqing Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000283080 Proboscidea <mammal> Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
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- 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
- E21B43/20—Displacing by water
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- 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
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- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses an oil extraction method for an ultra-low permeability oil reservoir or a compact oil reservoir, which is characterized by comprising the following steps of: after the horizontal well casing is completed, performing staged fracturing on a reservoir by adopting a horizontal well staged fracturing technology to form N artificial fractures communicated with the horizontal well, wherein the Mth artificial fracture is adjacent to the M +1 th artificial fracture, N is an integer more than or equal to 3, and M is 1, 2, 3, 4 … … N-1; the Mth artificial crack is closer to the wellhead of the horizontal well than the M +1 th artificial crack; setting the horizontal section of the horizontal well between the 1 st artificial crack and the 2 nd artificial crack which are adjacent by adopting a tubular column with a packer connected with an oil pipe, injecting water into the 1 st artificial crack through a sleeve, extracting oil through the oil pipe, and deblocking after the oil extraction is finished; and (3) setting the horizontal well between the M & ltth & gt artificial fracture and the (M + 1) th artificial fracture, injecting water into the M & ltth & gt artificial fracture through a casing pipe, and then extracting oil through an oil pipe. The method can realize water injection and oil extraction in the same well through one horizontal well.
Description
Technical field
The present invention relates to field of petroleum exploitation, particularly the oil production method of a kind of extra-low permeability oil reservoirs or compact oil reservoir.
Background technology
Extra-low permeability oil reservoirs and compact oil reservoir are distributed widely in each elephants such as China's Changqing oilfields, Xinjiang Oilfield, Daqing oil field, Jilin Oil Field, Dagang Oilfield, and reserves scale is huge, is 2.5 times of conventional reservoir reserve, and DEVELOPMENT PROSPECT is wide.Current China Changqing oilfields has carried out guiding development experiments in extra-low permeability oil reservoirs, and the built size of capacity reaches annual 3000000 tons, and increases year by year.Xinjiang Oilfield, Daqing oil field and Jilin Oil Field are done a lot of work in the exploration and development of compact oil reservoir, achieve certain progress.
But, extra-low permeability oil reservoirs, particularly compact oil reservoir have the features such as oil reservoir degree of porosity is low, permeability is low, pore throat is tiny, non-homogeneity is serious, because porous media space fluid filtrational resistance is large, flow difficulties in recovery process, therefore takes fractured horizontal well to go into operation usually.It is the main development scheme of extra-low permeability oil reservoirs and compact oil reservoir that elasticity is driven, and due to the energy shortage that elasticity is driven, therefore the recovery ratio of extra-low permeability/compact oil reservoir is general all lower, generally about 10%.Oil Field attempts the mining type adopting water filling between well, but due to reservoir permeability low, when well spacing is excessive, be difficult between water injection well and producing well, set up effective displacement system; But when reducing well spacing and making well spacing become suitable, single well controlled reserves step-down, it so becomes do not have extraction value lower than economic limit value.
Number of patent application is disclose a kind of quarrying apparatus for single-well injection-production and method in the Chinese patent of CN201310085607.X, and it is mainly applicable to stratified reservoir, by from the water filling of this well, recovers the oil from the respective layer position of offset well; Or from offset well water filling, recover the oil from this well respective layer position.But it remains the injection-production relation between two wells, when in region, control reserve is low, the expense that a well substantially increases construction is set more, and single well controlled reserves is strained mutually lower, lower than economic limit value, so this region does not just have extraction value.
Summary of the invention
In order to overcome the above-mentioned defect of prior art, embodiment of the present invention technical problem to be solved there is provided the oil production method of a kind of extra-low permeability oil reservoirs or compact oil reservoir, and it can realize same-well injection water, same well oil extraction by a horizontal well.
The concrete technical scheme of the embodiment of the present invention is:
An oil production method for extra-low permeability oil reservoirs or compact oil reservoir, it comprises the following steps:
After horizontal well casing pipe completion, adopt staged fracturing of horizontal well technology to carry out to reservoir the man-made fracture that staged fracturing is communicated with horizontal well to form N bar, wherein M article of man-made fracture is adjacent with M+1 article of man-made fracture, wherein N be more than or equal to 3 integer, M=1,2,3,4 ... N-1; M article of man-made fracture is compared with the well head of M+1 article of man-made fracture near horizontal well;
The tubing string with the packer be connected with oil pipe is adopted to be set by the horizontal segment of the described horizontal well between the adjacent the 1st article of man-made fracture and the 2nd article of man-made fracture, by sleeve pipe to water filling in the 1st article of man-made fracture, recovered the oil by described oil pipe, and after oil recovery completes deblocking;
The horizontal segment of the horizontal well between M article of adjacent man-made fracture and M+1 article of man-made fracture is carried out setting and after carrying out water filling by sleeve pipe in M article of man-made fracture, is recovered the oil by described oil pipe.
Preferably, described horizontal well is in extra-low permeability or compact oil reservoir region.
Preferably, for permeability lower than the ultralow permeable reservoir of 1 millidarcy or permeability lower than the compact oil reservoir of 0.1 millidarcy, when cased hole completion, the spacing of fracturing section is optimized, then according to the certain distance optimized, staged fracturing is carried out to horizontal well.
Preferably, according to reservoir parameter and horizontal well horizontal section length, the spacing to fracturing section is optimized.
Preferably, when reservoir formation pressure meets first condition, flow production mode is adopted to exploit oil reservoir; When strata pressure is reduced to second condition, the tubing string with the packer be connected with oil pipe is adopted to be set by the described horizontal well between the 1st article of man-made fracture and the 2nd article of man-made fracture, by sleeve pipe to water filling in described 1st article of man-made fracture, recovered the oil by described oil pipe.
Preferably, by to described in each during man-made fracture water filling, when the moisture content of the oily liq returned from well head reaches the limit values, stop to described man-made fracture water filling, deblocking is carried out to packer, transfer tubing string, set adjacent away from the horizontal well below the man-made fracture of horizontal well well head, water filling is carried out to the adjacent man-made fracture away from horizontal well well head.
Preferably, the limiting value of described moisture content is 98%; Or the limiting value of described moisture content is the eco-technical comparison obtained according to economic indexes calculation; Or the limiting value of described moisture content is the rule of thumb water cut limit determined of method.
Preferably, described tubing string comprises oil pipe, the packer be connected with oil pipe.
Preferably, after the horizontal segment of the horizontal well between N-1 article of adjacent man-made fracture and N article of man-made fracture carries out setting and carries out water filling by sleeve pipe in N-1 article of man-made fracture by step, in being recovered the oil by described oil pipe, water filling is carried out to N-1 article of man-made fracture by tubing string, crude oil flows in oil pipe from N article of man-made fracture, when the moisture content of the crude oil in oil pipe reaches the limit values, stop carrying out water filling to N-1 article of man-made fracture, terminate the oil producing operation of this well.
Preferably, when reservoir formation pressure does not meet first condition, oil pipe is installed oil well pump or electric submersible pump to aspirate the crude oil in horizontal well.
Technical scheme of the present invention has following remarkable beneficial effect:
1, the extra-low permeability oil reservoirs in the present invention or the oil production method of compact oil reservoir do not need to set up flooding pattern system, and an individual well just can realize water drive operation.
2, the extra-low permeability oil reservoirs in the present invention or the oil production method of compact oil reservoir more outstanding for extra-low permeability/compact oil reservoir effect, general elasticity drives recovery ratio in extra-low permeability/compact oil reservoir about 10%, and more than 10% can be brought up to after adopting the present invention, reach more than 20%.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit scope disclosed by the invention by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping the understanding of the present invention, are not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art under the teachings of the present invention, can select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 is the flow chart of steps of the oil production method of extra-low permeability oil reservoirs of the present invention or compact oil reservoir.
Fig. 2 is the structural representation carrying out horizontal well after staged fracturing.
Fig. 3 be the horizontal well between the 1st article of man-made fracture and the 2nd article of man-made fracture is set, the schematic diagram of water filling and oil recovery.
Fig. 4 be the horizontal well between the 2nd article of man-made fracture and the 3rd article of man-made fracture is set, the schematic diagram of water filling and oil recovery.
Fig. 5 be the horizontal well between N-1 article of man-made fracture and N article of man-made fracture is set, the schematic diagram of water filling and oil recovery.
The Reference numeral of above accompanying drawing:
1, horizontal well; 11, well head; 12, shaft bottom; 2, oil pipe; 3, the first packer; 4, man-made fracture.
Detailed description of the invention
By reference to the accompanying drawings with the description of the specific embodiment of the invention, can clearly understand details of the present invention.But the specific embodiment of the present invention described here, only for explaining object of the present invention, and can not to be understood as by any way be limitation of the present invention.Under the teachings of the present invention, technician can conceive based on distortion possible arbitrarily of the present invention, and these all should be regarded as belonging to scope of the present invention.
The present inventor relies on experience and the practice of being engaged in relevant industries for many years, the oil production method of a kind of extra-low permeability oil reservoirs or compact oil reservoir is proposed, need to offer at least two wells and just can complete to overcome in prior art the defect that note adopts work, just achieve the waterflooding behavior to oil reservoir by an individual well.
Fig. 1 is the flow chart of steps of the oil production method of extra-low permeability oil reservoirs of the present invention or compact oil reservoir, as shown in Figure 1, this method comprises the following steps: after horizontal well 1 cased hole completion, adopt horizontal well 1 staged fracturing technology to carry out to reservoir the man-made fracture 4 that staged fracturing is communicated with horizontal well 1 to form N bar, wherein M article of man-made fracture is adjacent with M+1 article of man-made fracture, wherein N be more than or equal to 3 integer, M=1,2,3,4 ... N-1; M article of man-made fracture is compared with the well head 11 of M+1 article of man-made fracture near horizontal well 1;
The tubing string with the packer be connected with oil pipe 2 is adopted to be set by the described horizontal well 1 between the adjacent the 1st article of man-made fracture and the 2nd article of man-made fracture, by sleeve pipe to water filling in the 1st article of man-made fracture, recovered the oil by described oil pipe 2, and after oil recovery completes deblocking;
Horizontal well 1 between M article of adjacent man-made fracture and M+1 article of man-made fracture is carried out setting and after carrying out water filling by sleeve pipe in M article of man-made fracture, is recovered the oil by described oil pipe 2.
Below each step in this method is described further, Fig. 2 is the structural representation carrying out horizontal well 1 after staged fracturing, as shown in Figure 2, a horizontal well 1 is offered in oil reservoir region, cased hole completion operation is carried out to horizontal well 1, then adopt horizontal well 1 staged fracturing technology to carry out to reservoir the man-made fracture 4 that staged fracturing is communicated with horizontal well 1 to form N bar, wherein N be more than or equal to 2 integer.This method can use in the oil reservoir region of any type, is particularly suitable for extra-low permeability or compact oil reservoir region.Typically, be distributed in the surrounding of horizontal well 1 around the axis hoop of horizontal well 1 at certain man-made fracture 4 of the same depth location of horizontal well 1, man-made fracture 4 is communicated with horizontal well 1, can carry out water filling by horizontal well 1 in man-made fracture 4.
For permeability lower than the ultralow permeable reservoir of 1 millidarcy or permeability lower than the compact oil reservoir of 0.1 millidarcy, when cased hole completion, the spacing of fracturing section is optimized, then according to the certain distance optimized, staged fracturing is carried out to horizontal well 1.The spacing of fracturing section can be optimized decision according to reservoir parameter and horizontal well 1 horizontal section length, so, can control the distance between adjacent two man-made fractures 4 by the spacing of control fracturing section.
The pressure of formation is tested, and obtains reservoir formation pressure.When reservoir formation pressure is higher, when reservoir formation pressure meets first condition, first condition is that reservoir formation pressure meets the pressure scales that can adopt flow production mode, directly first adopts flow production mode to exploit oil reservoir.When reservoir formation pressure does not meet first condition, oil pipe 2 can be installed oil well pump or electric submersible pump to aspirate the crude oil in horizontal well 1.Along with the carrying out of flow production, crude oil constantly exports, and strata pressure declines.Until strata pressure is reduced to second condition, second condition is that reservoir formation pressure is discontented with can to adopt the pressure scales of flow production mode.Fig. 3 be the horizontal well 1 between the 1st article of man-made fracture and the 2nd article of man-made fracture is set, the schematic diagram of water filling and oil recovery, as shown in Figure 3, the tubing string with the packer be connected with oil pipe 2 is adopted to be set by the horizontal well 1 between the 1st article of near for distance horizontal well 1 well head 11 man-made fracture and the 2nd article of man-made fracture.Wherein, the structure of tubing string specifically comprises oil pipe 2, the first packer 3 be connected with oil pipe 2.Article 2, man-made fracture is compared with the shaft bottom 12 of the 1st article of man-made fracture closer to horizontal well 1.
After horizontal well 1 between 1st article of man-made fracture and the 2nd article of man-made fracture is set, when to when carrying out water filling between oil pipe 2 and sleeve pipe, because the horizontal well 1 between the 1st of horizontal well 1 the article of man-made fracture and the 2nd article of man-made fracture sets by packer, the water injected in sleeve pipe can only flow into the 1st article of man-made fracture, water flows into oil reservoir region and carries out water drive oil from the 1st article of man-made fracture, oil in oil reservoir is driven in the 2nd article of man-made fracture, flow in oil pipe 2 from the crude oil of the 2nd article of man-made fracture output from the bottom of oil pipe 2, final under the continuous water filling of sleeve pipe, the crude oil flowed out from the 2nd article of man-made fracture constantly backflows to horizontal well 1 well head 11 from oil pipe 2.
During by sleeve pipe to man-made fracture 4 water filling, when the moisture content of the oily liq returned from well head 11 oil pipe 2 reaches the limit values, stop, to the water filling of described man-made fracture 4, carrying out deblocking to packer.Fig. 4 be the horizontal well 1 between the 2nd article of man-made fracture and the 3rd article of man-made fracture is set, the schematic diagram of water filling and oil recovery, as shown in Figure 4, transfer tubing string, by the horizontal well 1 between the 2nd article of man-made fracture of adjacent close horizontal well 1 well head 11 of packer setting and the 3rd article of man-made fracture, wherein, set between the N-2 article of man-made fracture and N-1 article of man-made fracture of horizontal well 1 by packer, set between the N-1 article of man-made fracture and N article of man-made fracture of horizontal well 1 by the second packer.Then main water filling is carried out to the 2nd article of man-made fracture, water flows into oil reservoir region and carries out water drive oil from the 2nd article of man-made fracture, oil in oil reservoir is driven in the 3rd article of man-made fracture, flow to oil pipe 2 from the crude oil of the 3rd article of man-made fracture output bottom oil pipe 2, final in sleeve pipe under continuous water filling, crude oil is from backflowing in oil pipe 2 to horizontal well 1 well head 11.When the moisture content of the oily liq returned from the oil pipe 2 of well head 11 reaches the limit values, stop, to the water filling of described man-made fracture 4, carrying out deblocking to packer.In above process, the limiting value of described moisture content is generally 98%, and the limiting value of described moisture content also can be the eco-technical comparison obtained according to economic indexes calculation, the water cut limit that the limiting value of described moisture content can also be determined for rule of thumb method.
Fig. 5 be the horizontal well 1 between N-1 article of man-made fracture and N article of man-made fracture is set, the schematic diagram of water filling and oil recovery, as shown in Figure 5, successively water flood operations is carried out to the 3rd article of man-made fracture, until N-1 article of man-made fracture, set between the N-1 article of man-made fracture and N article of man-made fracture of horizontal well 1 by packer.Then carry out water filling in sleeve pipe, water passes in N-1 article of man-made fracture in sleeve pipe, then flows in oil reservoir and carries out the displacement of reservoir oil, makes crude stream in oil reservoir to N man-made fracture.Crude oil flows out in N article of man-made fracture, and then flow to oil pipe 2 bottom oil pipe 2, due between N-1 article of man-made fracture of horizontal well 1 and N article of man-made fracture by packer setting, the crude oil flowed out from N article of man-made fracture can only flow in oil pipe 2, then flow to the well head 11 of horizontal well 1.When the moisture content of the oily liq returned from well head 11 reaches the limit values, stop to N-1 article of man-made fracture water filling, carrying out deblocking to packer, upper lifting pipe post, terminate the oil producing operation of this well.
Extra-low permeability oil reservoirs in the present invention or the oil production method of compact oil reservoir do not need to set up flooding pattern system, and an individual well just can realize water drive operation, i.e. only water filling in a well, realize recovering the oil in this well and by crude oil collection simultaneously.Secondly, the oil production method of extra-low permeability oil reservoirs or compact oil reservoir is more outstanding for extra-low permeability/compact oil reservoir effect, general elasticity drives recovery ratio in extra-low permeability/compact oil reservoir about 10%, and can bring up to more than 10% after adopting the present invention, reaches more than 20%.
Each embodiment in this manual all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (9)
1. an oil production method for extra-low permeability oil reservoirs or compact oil reservoir, is characterized in that, it comprises the following steps:
After horizontal well casing pipe completion, staged fracturing of horizontal well technology is adopted to carry out to reservoir the man-made fracture that staged fracturing is communicated with horizontal well to form N bar, wherein M article of man-made fracture is adjacent with M+1 article of man-made fracture, wherein N be more than or equal to 3 integer, M=1,2,3,4 ... N-1, M article of man-made fracture is compared with the well head of M+1 article of man-made fracture near horizontal well;
The tubing string with the packer be connected with oil pipe is adopted to be set by the horizontal segment of the described horizontal well between the adjacent the 1st article of man-made fracture and the 2nd article of man-made fracture, by sleeve pipe to water filling in the 1st article of man-made fracture, recovered the oil by described oil pipe, and after oil recovery completes deblocking;
The horizontal segment of the horizontal well between M article of adjacent man-made fracture and M+1 article of man-made fracture is carried out setting and after carrying out water filling by sleeve pipe in M article of man-made fracture, is recovered the oil by described oil pipe.
2. the oil production method of extra-low permeability oil reservoirs according to claim 1 or compact oil reservoir, it is characterized in that, for permeability lower than the ultralow permeable reservoir of 1 millidarcy or the permeability compact oil reservoir lower than 0.1 millidarcy, when cased hole completion, the spacing of fracturing section is optimized, then according to the certain distance optimized, staged fracturing is carried out to horizontal well.
3. the oil production method of extra-low permeability oil reservoirs according to claim 2 or compact oil reservoir, is characterized in that, according to reservoir parameter and horizontal well horizontal section length, the spacing to fracturing section is optimized.
4. the oil production method of extra-low permeability oil reservoirs according to claim 1 or compact oil reservoir, is characterized in that, when reservoir formation pressure meets first condition, adopts flow production mode to exploit oil reservoir; When strata pressure is reduced to second condition, the tubing string with the packer be connected with oil pipe is adopted to be set by the described horizontal well between the 1st article of man-made fracture and the 2nd article of man-made fracture, by sleeve pipe to water filling in described 1st article of man-made fracture, recovered the oil by described oil pipe.
5. the oil production method of extra-low permeability oil reservoirs according to claim 1 or compact oil reservoir, it is characterized in that, by to described in each during man-made fracture water filling, when the moisture content of the oily liq returned from well head reaches the limit values, stop to described man-made fracture water filling, deblocking is carried out to packer, transfers tubing string, set adjacent away from the horizontal well below the man-made fracture of horizontal well well head, water filling is carried out to the adjacent man-made fracture away from horizontal well well head.
6. the oil production method of extra-low permeability oil reservoirs according to claim 5 or compact oil reservoir, is characterized in that, the limiting value of described moisture content is 98%; Or the limiting value of described moisture content is the eco-technical comparison obtained according to economic indexes calculation; Or the limiting value of described moisture content is the rule of thumb water cut limit determined of method.
7. the oil production method of extra-low permeability oil reservoirs according to claim 1 or compact oil reservoir, is characterized in that, described tubing string comprises oil pipe, the packer be connected with oil pipe.
8. the oil production method of extra-low permeability oil reservoirs according to claim 1 or compact oil reservoir, it is characterized in that, after the horizontal segment of the described horizontal well between N-1 article of adjacent man-made fracture and N article of man-made fracture carries out setting and carries out water filling by sleeve pipe in N-1 article of man-made fracture by step, in being recovered the oil by described oil pipe, water filling is carried out to N-1 article of man-made fracture by sleeve pipe, crude oil flows in oil pipe from N article of man-made fracture, when the moisture content of the crude oil in oil pipe reaches the limit values, stop carrying out water filling to N-1 article of man-made fracture, terminate the oil producing operation of this well.
9. the oil production method of extra-low permeability oil reservoirs according to claim 1 or compact oil reservoir, is characterized in that, when reservoir formation pressure does not meet first condition, oil pipe is installed oil well pump or electric submersible pump to aspirate the crude oil in horizontal well.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105587300A (en) * | 2015-12-31 | 2016-05-18 | 中国石油天然气股份有限公司 | Oil recovery method for horizontal well |
| CN105715240A (en) * | 2016-03-31 | 2016-06-29 | 中国石油大学(北京) | Oil extraction method for injecting water among well fissures of multistage fractured horizontal well at intervals |
| CN105756634A (en) * | 2016-04-22 | 2016-07-13 | 中国石油大学(北京) | Method for achieving interval waterflood swallowing-spitting oil exploitation among multi-stage fractured horizontal well cracks |
| CN105822276A (en) * | 2016-04-22 | 2016-08-03 | 中国石油大学(北京) | Inter-crack space synchronous water injection-oil extraction method of multistage fracturing horizontal well |
| CN106246150A (en) * | 2016-09-18 | 2016-12-21 | 中国石油天然气股份有限公司 | Oil field fracturing transformation method |
| CN110259421A (en) * | 2019-05-23 | 2019-09-20 | 中国石油天然气股份有限公司 | Fractured compact oil reservoir water injection energy supplementing method |
| CN111997581A (en) * | 2019-05-27 | 2020-11-27 | 中国石油天然气股份有限公司 | Heterogeneous oil reservoir development method and device and electronic equipment |
| RU2785044C1 (en) * | 2022-03-15 | 2022-12-02 | Публичное акционерное общество "Нефтяная компания "Роснефть" (ПАО "НК "Роснефть") | Method for developing oil ultra-low-permeability deposits |
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