CN107956463A - A kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process - Google Patents
A kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000008569 process Effects 0.000 title claims abstract description 40
- 230000035699 permeability Effects 0.000 title claims abstract description 28
- 238000005336 cracking Methods 0.000 claims abstract description 14
- 239000003292 glue Substances 0.000 claims description 35
- 239000004576 sand Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 8
- 238000009530 blood pressure measurement Methods 0.000 claims description 7
- 101100008046 Caenorhabditis elegans cut-2 gene Proteins 0.000 claims description 4
- 238000004090 dissolution Methods 0.000 claims description 4
- 230000003204 osmotic effect Effects 0.000 claims description 3
- 239000003129 oil well Substances 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract description 7
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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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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Abstract
The present invention provides a kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, it includes the following steps：First, first time volume fracturing is carried out in the pit shaft of purpose reservoir, forms major fracture and its periphery secondary chicken-wire cracking along biggest principal stress direction extension, temporarily block up major fracture；Then, second of volume fracturing is carried out in the pit shaft of purpose reservoir, since a certain range of maximum principal stress field in pit shaft periphery occurs, close to 90 degree of upsets, to build a secondary major fracture generally vertically intersected with major fracture by second of volume fracturing and form chicken-wire cracking on its periphery after first time volume fracturing.Omnibearing stereo chicken-wire cracking can be built in straight well by the method for the present invention pressure break, first mate improves oil well transformation volume, improves oil well productivity.
Description
Technical field
The present invention relates to oil recovery field, is related to a kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process.
Background technology
Fossil energy is always one of important energy source that we depend on for existence for many years, and petroleum resources is increasingly subject to people
Attention.Further with petrol resources exploitation increases, and increases year by year in new proved reserves special low permeability oil field, extra-low permeability
Oil-gas reservoir fracturing reform is by as the primary position of frscturing.The ultra-low permeability reservoir refers to：Oil reservoir mean permeability is
(1.1~10.0) × 10-3μm2.This kind of oil reservoir and normal oil reservoir difference are obvious, and general irreducible water saturation increases, well logging
Resistivity reduces, and proper testing does not reach optimization for industry, it is necessary to relatively large fracturing reform and other corresponding measures are taken,
Industrial development could effectively be put into.Therefore, Main Yield-increasing measure of the pressure break as this kind of oil reservoir, is increasingly subject to the weight of people
Depending on.
Fracturing work is that stratum is pressed off crack using pump liquid, is pumped into the liquid for carrying proppant, treats formation closure
Liquid is discharged afterwards, ultimately forms the crack of flow conductivity, increases drainage area, reaches the percolation ability for improving reservoir, carries
The purpose of high oil well productivity.For many years, fracturing work achieves ideal effect in conventional low permeability reservoir transformation process
Fruit.But carried out with the exploitation of ultra-low permeability reservoir, effect is difficult to meet production requirement after conventional fracturing reform pattern pressure.Its
Reason is mainly manifested in, and ultra-low permeability reservoir matrix percolation ability is poor, and identical crack is established with conventional reservoir, such as formula (1)
Shown, its production capacity is much smaller than the production capacity of conventional hyposmosis.
K in formula:In-place permeability, D；h:Core intersection, m；PR:Terminal pressure, Mpa；Pwf:Bottom hole flowing pressure, Mpa；
μ,B:Fluid viscosity, oil volume factor, mPa.s, zero dimension；Sf：Crack skin factor；re, xf：Aerial drainage radius, crack half
It is long；CfD：Dimensionless fracture conductivity, CfD=KfWf/KXf, wherein KfFor fracture condudtiviy, WfFor slit width.
Therefore, people are sought for new fracturing process, have two kinds of technologies to be introduced into and are applied to the extra-low permeability in China
Exploitation, one kind are horizontal well multistage subsection pressure breaks, it improves single well productivity really, but its drilling cost and later stage press
Split somewhat expensive, it is difficult to achieve the purpose that the economic exploitation；One kind is volume fracturing, and this fracturing process is netted by transforming construction
Crack, improves production capacity so as to avoid the unfavorable factor of matrix seepage flow difference, still, to realize one important condition of volume fracturing
It is that horizontal maximum principal stress and minimum principal stress difference are small, and China's oil well buries generally relatively deeply, horizontal principal stress difference is bigger than normal, very
Hardly possible forms comprehensive solid netted crack, therefore, does not have wide application in straight well pattern mining operations.Horizontal well is more
The pattern of level staged fracturing+volume fracturing can obtain preferable effect, but cost problem is still that restriction is widely applied heavy
Want factor.
In conclusion have for a kind of economically viable new fracturing process of extra-low permeability oil reservoirs research and development very important
Meaning.
The content of the invention
It is contemplated that realize effective the economic exploitation of ultra-low permeability reservoir, there is provided a kind of economically viable straight well is comprehensive
Three-dimensional fracturing process.
The technical solution adopted by the present invention is as follows.
A kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, comprises the following steps：
First, first time volume fracturing is carried out in the pit shaft of purpose reservoir, forms the master extended along biggest principal stress direction
Crack and its periphery secondary chicken-wire cracking, temporarily block up major fracture；
Then, second of volume fracturing is carried out in the pit shaft of purpose reservoir, due to pit shaft periphery after first time volume fracturing
A certain range of maximum principal stress field occurs, close to 90 degree of upsets, one and major fracture can be built by second of volume fracturing
Generally vertically intersecting secondary major fracture and chicken-wire cracking is formed on its periphery, significantly transformation osmotic control area.
Further, a kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, comprises the following steps：
Step 1：Perforating job is carried out to purpose reservoir；
Step 2：Fracturing tubing string, packer set；
Step 3：Pressure testing；
Step 4：Prepad fluid is pumped into press off stratum and create major fracture；
Step 5：Slippery water is pumped into carry out volume fracturing and add sand；
Step 6：It is pumped into glue progress major fracture and adds sand；
Step 7：Termination of pumping, pressure measurement, discharge opeing；
Step 8：It is pumped into the glue closure crack of the soluble diverting agent of addition；
Step 9：Repeat step four arrives step 6, that is, is pumped into prepad fluid and presses off stratum and create time major fracture, be pumped into smooth
Water carries out volume fracturing and adds sand, is pumped into glue and adds sand into places major fracture；
Step 10：Closing well, discharge opeing.
Further, in step 1, perforating job perforation orientation angle is 90 degree, and pattern is screw holding, Kong Miwei
10-16 holes/m.
Further, in step 4, prepad fluid is glue, and the ground viscosity of the glue is more than 300mpa.s, in reservoir
At a temperature of 170s-1Viscosity is more than 50mpa.s when shear rate down cut 2 is small.
Further, in step 5, the viscosity of slippery water is 5mpa.s~10mpa.s, discharge capacity 5m3/min-8m3/min、
Proppant particle diameter is 40/70 mesh or 30/60 mesh, sand ratio are 3%-8%.Proppant particle diameter is 40/70 mesh or the granule of 30/60 mesh
Footpath proppant, difference lies in different formation condition applications is different.
Further, in step 6, the proppant particle diameter in glue is 30/60 mesh or 20/40 mesh, sand ratio are 5%-
50%.Proppant particle diameter is grain proppant in 30/60 mesh or 20/40 purpose.
Further, in step 7, the termination of pumping time is more than fracture closure times.
Further, in step 8, the solubility diverting agent can preferably block crack, be met after pressure break water-soluble
Solution meets oil dissolving.
Further, soluble diverting agent is pressure-resistant is more than 80MPa, when dissolution time is small less than 24 in the oil.
Further, in step 8, before the glue closure crack of the soluble diverting agent of addition is pumped into, open flow is further included
Step.
The basic principle of the present invention:Size and direction of the trend of fracturing fracture depending on stress field, crack is along most
Big principal direction of stress extension, after crack is formed, pit shaft periphery a certain range internal stress field changes, and especially maximum master should
Force direction occurs, close to 90 degree of reversions, to invert this characteristic after first time pressure break using stress after pressure, temporarily block up a crack,
Second of pressure break is carried out, the second crack is being built on the direction of the first crack, is hung down so as to form in plane two
Directly intersecting crack, volume fracturing mode is used in fracturing process twice at the same time, seam net is created on the periphery of major fracture, significantly
Add transformation osmotic control area.
Compared with prior art, the advantage of the invention is that：Carry out comprehensive volume fracturing on the basis of straight well, avoid
Horizontal well multistage subsection pressure break great number drilling cost, fracturing tool expense；Time master is created on the basis of single major fracture to split
Seam, generates secondary crack on the basis of major fracture, and drainage area, transformation volume are greatly improved compared with the prior art.
Brief description of the drawings
Fig. 1 is that ultra-low permeability reservoir straight well omnibearing stereo fracturing process provided by the invention forms crack vertical view signal
Figure.
Fig. 2 is the ultra-low permeability reservoir straight well omnibearing stereo fracturing process process flow chart that the embodiment of the present invention 2 provides.
Fig. 3 is the ultra-low permeability reservoir straight well omnibearing stereo fracturing process process flow chart that the embodiment of the present invention 3 provides.
Embodiment
In the following, the invention will be further described in conjunction with the accompanying drawings and embodiments.
Embodiment 1.A kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, comprises the following steps：Such as Fig. 1 institutes
Show, first time volume fracturing is carried out in the pit shaft 23 of the straight well of purpose reservoir, form the master extended along biggest principal stress direction
Crack 21 and secondary chicken-wire cracking 22, temporarily block up major fracture 21；Second of volume fracturing is carried out in the pit shaft of purpose reservoir, due to
The a certain range of maximum principal stress field in pit shaft periphery occurs, close to 90 degree of upsets, to pass through second of body after first time volume fracturing
A secondary major fracture 24 generally vertically intersected with major fracture 21 can be built and form chicken-wire cracking 25 on its periphery by overstocking to split.Net
What shape crack 22,25 was not simultaneously formed, secondary chicken-wire cracking 22, chicken-wire cracking 25 are crisscross, can significantly transform seepage flow control
Area processed.
Embodiment 2.A kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, comprises the following steps：
Step 1：Perforating job is carried out to purpose reservoir；Perforating job perforation orientation angle is 90 degree, and pattern is spiral
Cloth hole, 13 holes of Kong Miwei/m.
Step 2：Fracturing tubing string, packer set；
Step 3：Pressure testing；
Step 4：Prepad fluid is pumped into press off stratum and create major fracture；Prepad fluid is glue, the ground viscosity of the glue
More than 300mpa.s, the 170s under reservoir temperature-1Viscosity is more than 50mpa.s when shear rate down cut 2 is small.
Step 5：Slippery water is pumped into carry out volume fracturing and add sand；The viscosity of slippery water is 7mpa.s, discharge capacity 6m3/
Min, proppant particle diameter are 40/70 mesh, sand ratio is 3%-5%.Sand ratio is to change in fracturing process, from small to large.
Step 6：It is pumped into glue progress major fracture and adds sand；Proppant particle diameter in glue is 20/40 mesh, sand ratio is 7%-
45%.Sand ratio is to change in fracturing process, from small to large.
Step 7：Termination of pumping, pressure measurement, discharge opeing.The termination of pumping time is more than fracture closure times.
Step 8：It is pumped into the glue closure crack of the soluble diverting agent of addition.The solubility diverting agent can be sealed preferably
Chink, water dissolving is met after pressure break or meets oil dissolving.Soluble diverting agent is pressure-resistant to be more than 80MPa, when dissolving in the oil
Between be less than 24 it is small when.
Step 9：Repeat step four arrives step 6, that is, is pumped into prepad fluid and presses off stratum and create time major fracture, be pumped into smooth
Water carries out volume fracturing and adds sand, is pumped into glue and adds sand into places major fracture.
Step 10：Closing well, discharge opeing.
The present embodiment provides a kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, it includes the following steps：It is first
First, first time volume fracturing is carried out in the pit shaft of purpose reservoir, forms the major fracture along biggest principal stress direction extension and its week
Side secondary chicken-wire cracking, temporarily blocks up major fracture；Then, second of volume fracturing is carried out in the pit shaft of purpose reservoir, due to for the first time
The a certain range of maximum principal stress field in pit shaft periphery occurs, close to 90 degree of upsets, to pass through second of volume fracturing after volume fracturing
A secondary major fracture generally vertically intersected with major fracture can be built and form chicken-wire cracking on its periphery.Pass through the method for the present invention
Pressure break can build omnibearing stereo chicken-wire cracking in straight well, and first mate improves oil well transformation volume, improves oil well productivity
Embodiment 3.A kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process includes the following steps：Step 1：It is right
Purpose reservoir carries out perforating job；Step 2：Fracturing tubing string, packer set；Step 3：Pressure testing；Step 4：It is pumped into glue
Prepad fluid presses off stratum and creates major fracture；Step 5：Slippery water is pumped into carry out volume fracturing and add sand；Step 6：It is pumped into glue
Liquid carries out major fracture and adds sand；Step 7：Termination of pumping pressure measurement, discharge opeing；Step 8：Glue is pumped into, soluble diverting agent closure is added and splits
Seam；Step 9：Repeat step four arrives step 6；Step 10：Closing well, discharge opeing.By this method, can be formed on pit shaft periphery
Two major fractures to intersect vertically, form the seam net served as theme with major fracture on this basis, increase substantially transformation degree, real
The economic volume increase of existing oil well.
Embodiment 4.A kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, comprises the following steps：
Step 1：Perforating job is carried out to purpose reservoir；Perforating job perforation orientation angle is 90 degree, and pattern is spiral
Cloth hole, 15 holes of Kong Miwei/m.
Step 2：Fracturing tubing string, packer set；
Step 3：Pressure testing；
Step 4：Prepad fluid is pumped into press off stratum and create major fracture；Prepad fluid is glue, the ground viscosity of the glue
More than 300mpa.s, the 170s under reservoir temperature-1Viscosity is more than 50mpa.s when shear rate down cut 2 is small.
Step 5：Slippery water is pumped into carry out volume fracturing and add sand；The viscosity of slippery water is 8mpa.s, discharge capacity 7m3/
Min, proppant particle diameter are 30/60 mesh, sand ratio is 3%-7%.Sand is than being usually what is changed in fracturing process, from small to large.
Step 6：It is pumped into glue progress major fracture and adds sand；Proppant particle diameter in glue is 30/60 mesh, sand ratio is 5%-
40%.Sand is than being usually what is changed in fracturing process, from small to large.
Step 7：Termination of pumping, pressure measurement, discharge opeing.The termination of pumping time is more than fracture closure times.
Step 8：Open flow.It is pumped into the glue closure crack of the soluble diverting agent of addition.The solubility diverting agent can be preferably
Closure crack, after pressure break meet water dissolving or meet oil dissolving.Soluble diverting agent is pressure-resistant to be more than 80MPa, molten in the oil
When the solution time is small less than 24.
Step 9：Repeat step four arrives step 6, that is, is pumped into prepad fluid and presses off stratum and create time major fracture, be pumped into smooth
Water carries out volume fracturing and adds sand, is pumped into glue and adds sand into places major fracture.
Step 10：Closing well, discharge opeing.
Embodiment 5.This example provides a kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, as shown in Fig. 2,
The fracturing process includes the following steps：
Implementation steps one：Pressure break purpose is subjected to perforation, 90 degree of azimuth, screw holding, close 16 holes in hole/rice, using oil
Pipe conveys；
Implementation steps two：Drifting, pipe cleaning, well-flushing, fracturing tubing string, packer set；
Implementation steps three：Fracture well head is filled, connects manifold, pressure testing；
Implementation steps four：It is pumped into glue and carries out pad stage pressure break, crosslinking fluid viscosity is more than 300mpa.s, and design flow is full
The main seam design requirement of foot；
Implementation steps five：It is pumped into slippery water and carries out seam net pressure break, liquid viscosity 10mpa.s, discharge capacity 6m3/ min, sand ratio
3%-8%, 40/70 mesh of proppant particle diameter；
Implementation steps six：It is pumped into glue and carries out major fracture back-up sand, crosslinking fluid viscosity is more than 300mpa.s, proppant particle diameter
20/40 mesh, replaces；
Implementation steps seven：Termination of pumping, pressure measurement is until crack closure；
Implementation steps eight：Glue is pumped into, soluble diverting agent is carried and carries out sealing closure, diverting agent is pressure-resistant to be more than 80MPa,
When dissolution time is small less than 24 in water；
Implementation steps nine：Repeat step four arrives step 6, carries out second of volume fracturing；
Implementation steps ten：Closing well, discharge opeing.
Embodiment 6.This example provides a kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, referring to Fig. 3, institute
Fracturing process is stated to include the following steps：
Implementation steps one：Pressure break purpose is subjected to perforation, 90 degree of azimuth, screw holding, close 10 holes in hole/rice, using electricity
Cable conveys；
Implementation steps two：Drifting, pipe cleaning, well-flushing, fracturing tubing string；
Implementation steps three：Fracture well head is filled, connects manifold, pressure testing；
Implementation steps four：It is pumped into glue and carries out pad stage pressure break, crosslinking fluid viscosity is more than 300mpa.s, and design flow is full
Foot master seams meter；
Implementation steps five：It is pumped into slippery water and carries out seam net pressure break, discharge capacity 7m3/ min, sand is than 3%-8%, proppant particle diameter
30/60 mesh；
Implementation steps six：It is pumped into glue and carries out major fracture back-up sand, crosslinking fluid viscosity is more than 300mpa.s, proppant particle diameter
20/40 mesh, replaces；
Implementation steps seven：Termination of pumping, pressure measurement cause crack closure；
Implementation steps eight：Open flow, by design requirement open flow；
Implementation steps nine：Glue is pumped into, soluble diverting agent is carried and carries out sealing closure, diverting agent is pressure-resistant to be more than 80MPa,
When dissolution time is small less than 24 in the oil；
Implementation steps ten：Repeat step four arrives step 6, carries out second of volume fracturing.
Implementation steps 11：Closing well, discharge opeing.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention.Though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, the technical spirit according to the present invention is to any simple modification made for any of the above embodiments, equivalent
Change and modification, still fall within technical solution of the present invention protection in the range of.
Claims (10)
1. a kind of ultra-low permeability reservoir straight well omnibearing stereo fracturing process, it is characterised in that comprise the following steps：
First, first time volume fracturing is carried out in the pit shaft of purpose reservoir, forms the major fracture extended along biggest principal stress direction
And its periphery secondary chicken-wire cracking, temporarily block up major fracture；
Then, second of volume fracturing is carried out in the pit shaft of purpose reservoir, since pit shaft periphery is certain after first time volume fracturing
In the range of maximum principal stress field occur, close to 90 degree upsets, one and major fracture can be built substantially by second of volume fracturing
The secondary major fracture that intersects vertically simultaneously forms chicken-wire cracking on its periphery, significantly transforms osmotic control area.
2. straight well omnibearing stereo fracturing process according to claim 1, it is characterised in that include the following steps：
Step 1：Perforating job is carried out to purpose reservoir；
Step 2：Fracturing tubing string, packer set；
Step 3：Pressure testing；
Step 4：Prepad fluid is pumped into press off stratum and create major fracture；
Step 5：Slippery water is pumped into carry out volume fracturing and add sand；
Step 6：It is pumped into glue progress major fracture and adds sand；
Step 7：Termination of pumping, pressure measurement, discharge opeing；
Step 8：It is pumped into the glue closure crack of the soluble diverting agent of addition；
Step 9：Repeat step four arrives step 6, that is, is pumped into prepad fluid and presses off stratum and create time major fracture, be pumped into slippery water into
Row volume fracturing simultaneously adds sand, is pumped into glue and adds sand into places major fracture；
Step 10：Closing well, discharge opeing.
3. straight well omnibearing stereo fracturing process according to claim 1, it is characterised in that：In step 1, perforation is made
Industry perforation orientation angle is 90 degree, and pattern is screw holding, Kong Miwei 10-16 holes/m.
4. straight well omnibearing stereo fracturing process according to claim 1 is characterized in that：In step 4, prepad fluid is
Glue, the ground viscosity of the glue are more than 300mpa.s, the 170s under reservoir temperature-1Viscosity when shear rate down cut 2 is small
More than 50mpa.s.
5. straight well omnibearing stereo fracturing process according to claim 1 is characterized in that：In step 5, slippery water
Viscosity is 5mpa.s~10mpa.s, discharge capacity 5m3/min-8m3/ min, proppant particle diameter are 40/70 mesh or 30/60 mesh, sand ratio
For 3%-8%.
6. straight well omnibearing stereo fracturing process according to claim 1 is characterized in that：In step 6, in glue
Proppant particle diameter is 30/60 mesh or 20/40 mesh, sand ratio are 5%-50%.
7. straight well omnibearing stereo fracturing process according to claim 1 is characterized in that：In step 7, the termination of pumping time
More than fracture closure times.
8. straight well omnibearing stereo fracturing process according to claim 1 is characterized in that：It is described solvable in step 8
Property diverting agent can preferably block crack, after pressure break meet water dissolving or meet oil dissolving.
9. straight well omnibearing stereo fracturing process according to claim 8 is characterized in that：It is big that soluble diverting agent is pressure-resistant
In 80MPa, in the oil dissolution time be less than 24 it is small when.
10. straight well omnibearing stereo fracturing process according to claim 1 is characterized in that：In step 8, it is being pumped into
Before the glue closure crack of the soluble diverting agent of addition, the step of further including open flow.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110080745A (en) * | 2019-05-16 | 2019-08-02 | 中国石油化工股份有限公司胜利油田分公司勘探开发研究院 | Separate stratum fracfturing straight well PRODUCTION FORECASTING METHODS and device |
| CN111042790A (en) * | 2019-12-24 | 2020-04-21 | 中国石油大学(北京) | Repeated fracturing method and device |
| CN112983378A (en) * | 2021-03-24 | 2021-06-18 | 中国石油大学(华东) | Method for realizing multi-radial well three-dimensional fracturing multi-main seam balanced expansion and reinforced volume reconstruction |
| CN113550728A (en) * | 2021-08-26 | 2021-10-26 | 中国石油大学(北京) | Temporary plugging evaluation method and device |
| CN113669009A (en) * | 2020-05-13 | 2021-11-19 | 中国石油化工股份有限公司 | Method and system for decontaminating a retrograde condensation zone of a target well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110080745A (en) * | 2019-05-16 | 2019-08-02 | 中国石油化工股份有限公司胜利油田分公司勘探开发研究院 | Separate stratum fracfturing straight well PRODUCTION FORECASTING METHODS and device |
| CN111042790A (en) * | 2019-12-24 | 2020-04-21 | 中国石油大学(北京) | Repeated fracturing method and device |
| CN113669009A (en) * | 2020-05-13 | 2021-11-19 | 中国石油化工股份有限公司 | Method and system for decontaminating a retrograde condensation zone of a target well |
| CN113669009B (en) * | 2020-05-13 | 2024-06-07 | 中国石油化工股份有限公司 | Method and system for decontaminating a reverse condensation zone of a target well |
| CN112983378A (en) * | 2021-03-24 | 2021-06-18 | 中国石油大学(华东) | Method for realizing multi-radial well three-dimensional fracturing multi-main seam balanced expansion and reinforced volume reconstruction |
| CN113550728A (en) * | 2021-08-26 | 2021-10-26 | 中国石油大学(北京) | Temporary plugging evaluation method and device |
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