CN105114048B - A kind of staged fracturing of horizontal well single-well injection-production oil production method - Google Patents
A kind of staged fracturing of horizontal well single-well injection-production oil production method Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 239000003921 oil Substances 0.000 claims abstract description 102
- 239000010779 crude oil Substances 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims description 66
- 239000007924 injection Substances 0.000 claims description 66
- 239000007788 liquid Substances 0.000 claims description 62
- 238000000605 extraction Methods 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 abstract description 19
- 238000001802 infusion Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000011218 segmentation Effects 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 7
- 238000011084 recovery Methods 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 235000015076 Shorea robusta Nutrition 0.000 description 1
- 244000166071 Shorea robusta Species 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001502 supplementing effect Effects 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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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
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
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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
-
- 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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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of staged fracturing of horizontal well single-well injection-production oil production method, pass through staged fracturing of horizontal well, the a plurality of fracturing fracture perpendicular to horizontal wellbore is produced in oil reservoir different parts, choose a wherein crack and be used as fluid infusion channel, the crack of both sides adjacent thereto produces passage as crude oil, and displacement crude oil is located at middle crack to both sides flow in fracture along described；Packing technology is segmented with reference to double tube, this crack is insulated with two adjacent cracks in horizontal well, fluid injects from intermediate cracking, displacement crude oil is to both sides adjacent slits, it flow to horizontal wellbore, production fluid is along another oil pipe passage output pit shaft, so as to form segmentation single-well injection-production system in same level well.
Description
Technical field
The present invention relates to a kind of staged fracturing of horizontal well single-well injection-production oil production method, belong to the technology neck of Oilfield Development Engineering
Domain.
Technical background
Growing with global economy, the world rapidly increases to the demand of oil, by eighties of last century to routine
After the large-scale exploitation of oily resource, the newly increased recoverable reserves of high-quality crude are difficult to meet growing consumption, and the shape
Condition is especially prominent in China.In this context, low-permeability oil deposit and nontraditional reservoir particularly compact oil reservoir are increasingly becoming me
The emphasis of state's future oil and gas development.
Low-permeability oil deposit refers to that the porosity of oil reservoir is low, venturi is small, penetrating power poor (permeability is below 50 millidarcies),
Production capacity is low, it usually needs carry out the oil reservoir that reservoir improvement could be produced normally.Fine and close oil refers to absorption or free state preservation
Being born from storage certainly, continuously dividing in rich organic matter and the extremely low dark shales of permeability, argillaceous siltstoue and sand streak system
The oil accumulation of cloth, its permeability is general below 1 millidarcy.
The development scheme that low-permeability oil deposit is commonly used at present is favorably with the exploitation of stratum elastic energy exhaustion formula, waterflooding extraction, note
Gas exploitation etc.；Compact oil reservoir is mainly the exploitation of exhaustion formula at present, and it is mode the most feasible that gas injection, which improves its recovery ratio,.Utilize ground
Layer elastic energy exhaustion formula exploitation, due to no energy supplement, recovery ratio is extremely low.By supplementing stratum to oil-bearing stratum flooding or gas injection
Energy, using water or gas from injection well to extraction well displacement crude oil, be the effective ways for improving oil recovery factor.Larger
Under the conditions of well spacing, simultaneously because low-permeability oil deposit permeability is relatively low, difficult water injection is caused, water injection pressure is high, can not usually built
Found normal injection-production relation.After fracturing reform, injection fluid is often along crack channelling, it is difficult to enter perpendicular to crack side
To oil reservoir.The effective ways of drop low injection pressure, raising water drive or gas drive effect are to reduce well spacing.But by drilling cost control
System, the well spacing between injection well and extraction well unconfined can not reduce.For compact oil reservoir, gas injection pressure mistake is equally existed
Height, the problem of gas injection is difficult.
Term is explained：
Staged fracturing of horizontal well：Instrument is separated by underground, horizontal well is divided into some sections, carried out respectively for each section
Pressure break, forms the reservoir reconstruction technique of man-made fracture at each section.
The content of the invention
For existing technical problem, the present invention provides a kind of staged fracturing of horizontal well single-well injection-production oil production method.This hair
Bright not only reduction water filling, steam injection pressure, and improve LOW PERMEABILITY RESERVOIR and compact oil reservoir development degree.
Summary of the invention：
The present invention produces a plurality of pressure break perpendicular to horizontal wellbore by staged fracturing of horizontal well, in oil reservoir different parts and split
Seam, chooses a wherein crack as fluid infusion channel, the crack of both sides adjacent thereto is used as crude oil extraction passage, displacement
Crude oil is located at middle crack to both sides flow in fracture along described；Packing technology is segmented with reference to double tube, by this in horizontal well
Crack is insulated with two adjacent cracks, and fluid injects along an oil pipe passage from intermediate cracking, displacement crude oil to both sides
Adjacent slits, flow to horizontal wellbore, and production fluid divides along another oil pipe passage output pit shaft so as to be formed in same level well
Section single-well injection-production system.
Technical scheme is as follows：
A kind of staged fracturing of horizontal well single-well injection-production oil production method, including：
1) to horizontal well pit shaft staged fracturing：Form a plurality of radial direction fracturing fracture perpendicular to horizontal well pit shaft；
2) three adjacent cracks are chosen in the crack：Positioned at middle for target injection crack；Positioned at the mesh
The crack into crack both sides is marked, and extraction crack I and extraction crack II respectively are along injection liquid injection direction；
3) double-deck concentric oil tubes or parallel double tube are installed in the sleeve pipe in horizontal well pit shaft：By the sky in described sleeve pipe
Between be divided into Produced Liquid passage I, injection liquid passage and Produced Liquid passage II；The double-deck concentric oil tubes include outer tube and are set in
Region in inner tube in outer tube, said inner tube is Produced Liquid passage II, and the region between the outer tube and inner tube is injection liquid
Passage, the region between the outer tube and sleeve pipe is Produced Liquid passage I；An oil pipe in the parallel double tube is injection liquid
Passage, another oil pipe is Produced Liquid passage II, and the region between the parallel double tube and sleeve pipe is Produced Liquid passage I；Institute
Injection channel end is stated to set for closing；
4) the injection liquid passage is connected with target injection crack；By the Produced Liquid passage I and the extraction
Crack I is connected；The Produced Liquid passage II is connected with the extraction crack II；
5) displacement of reservoir oil agent enters target injection crack along the injection liquid passage, and penetrates into oil reservoir, to the target
Inject crack both sides displacement crude oil and enter the extraction crack I and extraction crack II, finally along the Produced Liquid passage I and extraction
Liquid passage II is produced.
According to currently preferred, in the end of the double-deck concentric oil tubes or parallel double tube：Its described injection liquid leads to
The endcapped in road is set, and its described Produced Liquid passage II end is connected with the extraction crack II；The injection liquid passage is set
The sieve tube segment relative with target injection crack is equipped with, is connected with target injection crack, forms injection flow-guiding channel；Institute
Produced Liquid passage I is stated to connect with the extraction crack I.
According to currently preferred, in the step 1) select suitably to carry out the hypotonic of horizontal well pit shaft staged fracturing before
Or compact oil reservoir.It is preferred that, the core intersection is more than 10m.
According to currently preferred, the step 1) in, the horizontal well pit shaft is along stratum minimum horizontal principal stress side
To what is be drilled to, the horizontal well pit shaft is located at oil reservoir middle and lower part.It is preferred that, Horizontal Well tube length degree is more than 100 meters, it is desirable to exploit
Oil reservoir position is free of edge-bottom water.Because edge-bottom water is likely to be partially formed water cone in horizontal well pit shaft or causes quick water logging, make
Into big volume production water, therefore it is required that the oil reservoir is free of edge-bottom water；Horizontal well pit shaft along stratum minimum horizontal principal stress direction be for
Subsequent implementation staged fracturing is can form the radial fissure perpendicular to horizontal well pit shaft.
According to currently preferred, the step 1) in, the horizontal well wellbore section is adopted to give full play to same layer note
Advantage, per segment length scope 30m-150m.According to reservoir physical property, horizontal well pit shaft is divided into some sections, segmentation carries out pressure break.
According to currently preferred, the step 5) in, displacement of reservoir oil agent is persistently injected, when crude output drops to economic production
When amount is following, three adjacent cracks are reselected as one group of note newly and adopt crack, i.e. repeat step 2)-step 5), until
The crude oil of whole Crack Controls of the horizontal well pit shaft is exploited.
According to currently preferred, the displacement of reservoir oil is that note adopts liquid or note gas production body with agent.
The present invention has the advantages that：
1st, with by injection well, compared with producing well crude oil extraction, fluid infusion pressure of the present invention is not by well spacing shadow
Ring, crack interval can be determined according to reservoir physical property, be easy to control injection production pressure difference and displacement intensity.
2nd, compared with being developed using stratum elastic energy exhaustion formula, the present invention supplements stratum energy by injecting fluid, together
When displacement crude oil extraction, oil recovery factor is greatly improved.
3rd, the present invention is in the opening well and making production stage, due to the presence of fracturing fracture, area of passage increase, injection fluid and crude oil
Flow resistance be greatly lowered, significantly reduce fluid infusion pressure, improve the fluid ability of crude oil, while drainage area
Increase, improves hypotonic, compact oil reservoir crude output and development effectiveness.
4th, the present invention can be reached by single port horizontal well pit shaft while injection fluid and the dual-use function of oil recovery, slow down
Restriction of the oil well quantity to oilfield stimulation, so as to greatly reduce oil field development cost.
5th, the present invention adopts the combination and exploitation paragraph by paragraph in crack by note, oil well can be controlled into oil to greatest extent
The crude oil extraction of layer, oil recovery factor is high.
Brief description of the drawings：
Fig. 1 adopts principle schematic for double-deck concentric oil tubes note of the present invention；
In Fig. 1,1- oil reservoirs border；2- sleeve pipes；The outer tube of 3- bilayer concentric oil tubes；The inner tube of 4- bilayer concentric oil tubes；5-
The flow direction of 1- fluids；The flow direction of 5-2- crude oil；6- sieve tube segments；7- oil reservoirs；8- straight wells section；9- fracturing fractures a is (selected
For extraction crack II)；10- fracturing fractures b (is chosen as target injection crack)；11- fracturing fractures c (is chosen as producing crack I)；
12- fracturing fractures d；13- fracturing fractures e；14- fracturing fractures f；15- packers；16- packers；17- packers.
Fig. 2 is that note of the double-deck concentric oil tubes of the present invention after conversion note adopts crack adopts principle schematic；
In Fig. 2,1- oil reservoirs border；2- sleeve pipes；The outer tube of 3- bilayer concentric oil tubes；The inner tube of 4- bilayer concentric oil tubes；5-
The flow direction of 1- fluids；The flow direction of 5-2- crude oil；6- sieve tube segments；7- oil reservoirs；8- straight wells section；9- fracturing fractures a；10-
Fracturing fracture b；11- fracturing fractures c；12- fracturing fractures d (is chosen as producing crack II)；13- fracturing fractures e (is chosen as target
Inject crack)；14- fracturing fractures f (is chosen as producing crack I)；15- packers；16- packers；17- packers.
Fig. 3 adopts principle schematic for parallel double tube note of the present invention；
In Fig. 3,1- oil reservoirs border；2- sleeve pipes；A pipes in the parallel double tubes of 3-1-；B pipes in the parallel double tubes of 4-1-；
The flow direction of 5-1- fluids；The flow direction of 5-2- crude oil；6- sieve tube segments；7- oil reservoirs；8- straight wells section；9- fracturing fracture a (quilts
Elect extraction crack II as)；10- fracturing fractures b (is chosen as target injection crack)；11- fracturing fractures c (is chosen as producing crack
I)；12- fracturing fractures d；13- fracturing fractures e；14- fracturing fractures f；15- packers；18- is used for the plug closed.
Fig. 4 is that note of the parallel double tube of the present invention after conversion note adopts crack adopts principle schematic；
In Fig. 4,1- oil reservoirs border；2- sleeve pipes；The A pipes of the parallel double tubes of 3-1-；The B pipes of the parallel double tubes of 4-1-；5-1-
The flow direction of fluid；The flow direction of 5-2- crude oil；6- sieve tube segments；7- oil reservoirs；8- straight wells section；9- fracturing fractures a；10- is pressed
Crack b；11- fracturing fractures c；12- fracturing fractures d (is chosen as producing crack II)；13- fracturing fractures e (is chosen as target note
Enter crack)；14- fracturing fractures f (is chosen as producing crack I)；15- packers；18- is used for the plug closed.
Embodiment：
The present invention is described in detail with reference to embodiment and Figure of description, but not limited to this.
As Figure 1-4.
Embodiment 1,
A kind of staged fracturing of horizontal well single-well injection-production oil production method, including：
1) to horizontal well pit shaft staged fracturing：Form a plurality of radial direction fracturing fracture perpendicular to horizontal well pit shaft；
2) three adjacent cracks are chosen in the crack：Positioned at middle for target injection crack；Positioned at the mesh
The crack into crack both sides is marked, and extraction crack I and extraction crack II respectively are along injection liquid injection direction；Such as Fig. 1
Shown, selection fracturing fracture a 9 is that extraction crack II, selection fracturing fracture b 10 are target injection crack, selection fracturing fracture c
11 be extraction crack I；
3) double-deck concentric oil tubes or parallel double tube are installed in the sleeve pipe in horizontal well pit shaft：By in described sleeve pipe 2
Space is divided into Produced Liquid passage I, injection liquid passage and Produced Liquid passage II；As shown in Figure 1, 2, the double-deck concentric oil tubes bag
It is Produced Liquid passage II, the outer tube 3 and inner tube 4 to include the region in outer tube 3 and the inner tube 4 being set in outer tube, said inner tube 4
Between region for injection liquid passage, region between the outer tube 4 and sleeve pipe 2 is Produced Liquid passage I；As shown in Figure 3,4, institute
It is to inject liquid passage to state an oil pipe in parallel double tube, the A pipes 3-1 of as parallel double tube, and another oil pipe is extraction
Liquid passage II, the B pipes 4-1 of as parallel double tube, the region between the parallel double tube and sleeve pipe 2 are Produced Liquid passage I；
The injection channel end is set for closing：In the present embodiment, in the double-deck concentric oil tubes, injection channel end is packer
16, in the parallel double tube, injection channel end is the plug 18 for closing；
4) the injection liquid passage is connected with target injection crack；By the Produced Liquid passage I and the extraction
Crack I is connected；The Produced Liquid passage II is connected with the extraction crack II；
5) displacement of reservoir oil agent enters target injection crack along the injection liquid passage, and penetrates into oil reservoir, to the target
Inject crack both sides displacement crude oil and enter the extraction crack I and extraction crack II, finally along the Produced Liquid passage I and extraction
Liquid passage II is produced.
In the end of the double-deck concentric oil tubes or parallel double tube：The endcapped of its injection liquid passage is set,
Its described Produced Liquid passage II end is connected with the extraction crack II；The injection liquid passage is provided with to be injected with the target
The relative sieve tube segment in crack, connects with target injection crack, forms injection flow-guiding channel；The Produced Liquid passage I and institute
State extraction crack I connections.
Embodiment 2,
A kind of staged fracturing of horizontal well single-well injection-production oil production method as described in Example 1, its difference is, the step
5) in, fluid is persistently injected, when crude output drops to below economic flow rate, three adjacent cracks are reselected as one
The new note of group adopts crack, i.e. repeat step 2)-step 5), the original of whole Crack Controls until having exploited the horizontal well pit shaft
Oil.As shown in Fig. 2 it is target injection crack, selection that selection fracturing fracture d 12, which is extraction crack II, selection fracturing fracture e 13,
Fracturing fracture f 14 is extraction crack I.
Embodiment 3,
A kind of staged fracturing of horizontal well single-well injection-production oil production method as described in embodiment 1-2, in the step 1) before
Selection suitably carries out the hypotonic or compact oil reservoir of horizontal well pit shaft staged fracturing, herein preferred LOW PERMEABILITY RESERVOIR, its milli of permeability 15
Darcy, 20 meters of core intersection, oil reservoir is free of edge-bottom water.
The step 1) in, the horizontal well pit shaft is drilled to along stratum minimum horizontal principal stress direction, the level
Well shaft is located at oil reservoir middle and lower part.Preferred levels well shaft length is 600 meters herein, it is desirable to exploit oil reservoir position without side bottom
Water.Because edge-bottom water is likely to be partially formed water cone in horizontal well pit shaft or causes quick water logging, big volume production water is caused, therefore will
The oil reservoir is asked to be free of edge-bottom water；Horizontal well pit shaft is for subsequent implementation staged fracturing along stratum minimum horizontal principal stress direction
It is that can form the radial fissure perpendicular to horizontal well pit shaft.The horizontal well pit shaft is divided into 6 sections, herein preferably per segment length
100m.According to reservoir physical property, horizontal well pit shaft is divided into some sections, segmentation carries out pressure break.Development scheme described herein is water filling
Exploitation.
Embodiment 4,
A kind of staged fracturing of horizontal well single-well injection-production oil production method as described in embodiment 1-3, in the step 1) before
Selection suitably carries out the hypotonic or compact oil reservoir of horizontal well pit shaft staged fracturing, herein preferred compact oil reservoir, its milli of permeability 0.1
Darcy, 50 meters of core intersection, oil reservoir is free of edge-bottom water.
The step 1) in, the horizontal well pit shaft is drilled to along stratum minimum horizontal principal stress direction, the level
Well shaft is located in the middle part of oil reservoir.Preferred levels well shaft length is 1000 meters herein, and horizontal well pit shaft is divided into 20 sections, divided
Section pressure break, per segment length 50m, forms 20 radial direction fracturing fractures perpendicular to horizontal well pit shaft.It is described herein injection fluid be
CO2。
Claims (7)
1. a kind of staged fracturing of horizontal well single-well injection-production oil production method, it is characterised in that the oil production method includes：
1) to horizontal well pit shaft staged fracturing：Form a plurality of radial direction fracturing fracture perpendicular to horizontal well pit shaft；
2) three adjacent cracks are chosen in the crack：Positioned at middle for target injection crack；Positioned at target note
Enter the crack on crack both sides, and extraction crack I and extraction crack II respectively are along injection liquid injection direction；
3) double-deck concentric oil tubes or parallel double tube are installed in the sleeve pipe in horizontal well pit shaft：By the space in described sleeve pipe point
It is divided into Produced Liquid passage I, injection liquid passage and Produced Liquid passage II；The double-deck concentric oil tubes include outer tube and are set in outer tube
Region in interior inner tube, said inner tube is Produced Liquid passage II, and the region between the outer tube and inner tube is injection liquid passage,
Region between the outer tube and sleeve pipe is Produced Liquid passage I；An oil pipe in the parallel double tube is injection liquid passage,
Another oil pipe is Produced Liquid passage II, and the region between the parallel double tube and sleeve pipe is Produced Liquid passage I；The injection
Channel end is set for closing；
4) the injection liquid passage is connected with target injection crack；By the Produced Liquid passage I and the extraction crack I
Connection；The Produced Liquid passage II is connected with the extraction crack II；
5) displacement of reservoir oil agent enters target injection crack along the injection liquid passage, and penetrates into oil reservoir, is injected to the target
Displacement crude oil in crack both sides enters the extraction crack I and extraction crack II, finally logical along the Produced Liquid passage I and Produced Liquid
Road II is produced；
In the end of the double-deck concentric oil tubes or parallel double tube：The endcapped of its injection liquid passage is set, its institute
Produced Liquid passage II ends are stated to connect with the extraction crack II；The injection liquid passage is provided with injects crack with the target
Relative sieve tube segment, connects with target injection crack, forms injection flow-guiding channel；The Produced Liquid passage I is adopted with described
Go out crack I connections.
2. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 1, it is characterised in that described
Step 1) select suitably to carry out the hypotonic or compact oil reservoir of horizontal well pit shaft staged fracturing before.
3. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 2, it is characterised in that the step
It is rapid 1) in, the horizontal well pit shaft is drilled to along stratum minimum horizontal principal stress direction, the horizontal well pit shaft be located at oil reservoir
Middle and lower part.
4. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 3, it is characterised in that horizontal well
Pit shaft length is more than 100 meters, it is desirable to exploit oil reservoir position without edge-bottom water.
5. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 4, it is characterised in that the step
It is rapid 1) in, by the horizontal well wellbore section, per segment length scope 30m-150m.
6. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 1, it is characterised in that the step
It is rapid 5) in, persistently inject displacement of reservoir oil agent, when crude output drops to below economic flow rate, reselect three adjacent cracks
Crack, i.e. repeat step 2 are adopted as one group of note newly)-step 5), until the whole cracks for having exploited the horizontal well pit shaft are controlled
The crude oil of system.
7. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 1, it is characterised in that the drive
Oil is that note adopts liquid or note gas production body with agent.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510506961.4A CN105114048B (en) | 2015-08-17 | 2015-08-17 | A kind of staged fracturing of horizontal well single-well injection-production oil production method |
| PCT/CN2015/087878 WO2017028322A1 (en) | 2015-08-17 | 2015-08-23 | Horizontal well staged fracturing oil production method by injection and production in same well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510506961.4A CN105114048B (en) | 2015-08-17 | 2015-08-17 | A kind of staged fracturing of horizontal well single-well injection-production oil production method |
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| CN105114048A CN105114048A (en) | 2015-12-02 |
| CN105114048B true CN105114048B (en) | 2017-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587300B (en) * | 2015-12-31 | 2019-10-11 | 中国石油天然气股份有限公司 | Oil recovery method for horizontal well |
| CN105422057A (en) * | 2015-12-31 | 2016-03-23 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-low permeability oil reservoir or compact oil reservoir |
| CN105545272B (en) * | 2015-12-31 | 2018-06-01 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-low permeability water-sensitive reservoir/compact reservoir |
| CN105715240B (en) * | 2016-03-31 | 2018-07-17 | 中国石油大学(北京) | It is spaced water injection oil extraction method between multistage fracturing horizontal well seam |
| CN105696997B (en) * | 2016-03-31 | 2018-07-17 | 中国石油大学(北京) | It is spaced cyclic water stimulation oil production method between multistage fracturing horizontal well seam |
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