CN105114048A - Horizontal well staged fracturing oil production method through injection and production in same well - Google Patents
Horizontal well staged fracturing oil production method through injection and production in same well Download PDFInfo
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- CN105114048A CN105114048A CN201510506961.4A CN201510506961A CN105114048A CN 105114048 A CN105114048 A CN 105114048A CN 201510506961 A CN201510506961 A CN 201510506961A CN 105114048 A CN105114048 A CN 105114048A
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- 238000002347 injection Methods 0.000 title claims abstract description 54
- 239000007924 injection Substances 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 49
- 239000003921 oil Substances 0.000 claims abstract description 123
- 239000007788 liquid Substances 0.000 claims abstract description 63
- 239000010779 crude oil Substances 0.000 claims abstract description 22
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000000605 extraction Methods 0.000 claims description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000011218 segmentation Effects 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 18
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 230000018109 developmental process Effects 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 238000011084 recovery Methods 0.000 description 6
- 238000001802 infusion Methods 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000012856 packing Methods 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
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- 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
The invention discloses a horizontal well staged fracturing oil production method through injection and production in the same well. Multiple fracturing cracks perpendicular to a horizontal well shaft are generated at different parts of an oil layer through the horizontal well staged fracturing; one of the cracks is selected as a fluid injecting channel, and the adjacent cracks at two sides serve as crude oil production channels; displacement crude oil flows to the cracks at two sides along the crack in the middle; a double-oil-pipe segmented sealing technology is combined to seal the crack and the adjacent two cracks; a fluid is injected in from the middle crack; the displacement crude oil flows to the horizontal well shaft from the adjacent cracks at two sides; and produced liquid flows outside the shaft along another oil pipe channel to form a segmented same-well injection and production system in the same horizontal 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 technical field of Oilfield Development Engineering.
Technical background
Growing along with global economy, the world is to the demand rapid growth of oil, after eighties of last century is to the large-scale exploitation of the oily resource of routine, the newly increased recoverable reserves of high-quality crude is difficult to meet growing consumption, and this situation is particularly outstanding in China.In this context, low-permeability oil deposit and nontraditional reservoir particularly compact oil reservoir become the emphasis of the following oil and gas development of China just gradually.
Low-permeability oil deposit refers to that the degree of porosity of oil reservoir is low, venturi is little, penetrating power poor (permeability is below 50 millidarcies), production capacity are low, and usually needing to carry out reservoir improvement could the normal oil reservoir produced.Fine and close oil refers to adsorb or free state is composed and is stored in the rich organic and oil accumulation of being certainly conigenous storage, continuous distributed in dark shales, argillaceous siltstoue and sand streak system that permeability is extremely low, and its permeability is generally below 1 millidarcy.
The exploitation of development scheme favourable stratum elastic energy exhaustion formula, waterflooding extraction, gas injection development etc. that low-permeability oil deposit is commonly used at present; Compact oil reservoir is mainly the exploitation of exhaustion formula at present, and it is mode the most feasible that gas injection improves its recovery ratio.Utilize elastic energy exhaustion formula in stratum to develop, owing to not having energy supplement, recovery ratio is extremely low.By supplementing stratum energy to oil-bearing stratum flooding or gas injection, utilizing water or gas from Injection Well to extraction well displace crude oil, be the effective ways improving oil recovery factor.Under larger well spacing condition, simultaneously because low-permeability oil deposit permeability is lower, cause difficult water injection, water injection pressure is high, usually cannot set up normal injection-production relation.After fracturing reform, inject fluid often along crack channelling, be difficult to enter the oil reservoir perpendicular to fractuer direction.Reducing injection pressure, improving the effective ways of water drive or gas drive effect is reduce well spacing.But control by drilling cost, the well spacing between Injection Well and extraction well can not unconfinedly reduce.For compact oil reservoir, there is gas injection pressure equally too high, the problem of gas injection difficulty.
Terminological interpretation:
Staged fracturing of horizontal well: separate instrument by down-hole, is divided into some sections by horizontal well, carries out pressure break respectively for each section, forms the reservoir reconstruction technique of man-made fracture at each section.
Summary of the invention
For existing technical problem, the invention provides a kind of staged fracturing of horizontal well single-well injection-production oil production method.The present invention not only reduces water filling, steam injection pressure, and improves LOW PERMEABILITY RESERVOIR and compact oil reservoir development degree.
Summary of the invention:
The present invention passes through staged fracturing of horizontal well, many the fracturing fractures perpendicular to horizontal wellbore are produced at oil reservoir different parts, choose wherein a crack as fluid infusion channel, the crack of both sides adjacent with it, as crude oil extraction passage, is positioned at middle crack to both sides flow in fracture described in displace crude oil edge; In conjunction with double tube segmentation packing technology, in horizontal well, packing is carried out in this crack and adjacent two cracks, fluid injects along an oil pipe passage from intermediate cracking, displace crude oil is to both sides adjacent slits, flow to horizontal wellbore, production fluid along another oil pipe passage output pit shaft, thus forms segmentation single-well injection-production system in same level well.
Technical scheme of the present invention is as follows:
A kind of staged fracturing of horizontal well single-well injection-production oil production method, comprising:
1) to horizontal well pit shaft staged fracturing: form many radial fracturing fractures perpendicular to horizontal well pit shaft;
2) in described crack, three adjacent cracks are chosen: being positioned at middle is target injection crack; Be positioned at the crack that described target injects both sides, crack, and respectively be extraction crack I and extraction crack II along injection liquid injection direction;
3) double-deck concentric oil tubes or parallel double oil pipe are installed: the space in described sleeve pipe is divided into Produced Liquid passage I, injection liquid passage and Produced Liquid passage II in the sleeve pipe in horizontal well pit shaft; Described double-deck concentric oil tubes comprises outer tube and sheathed interior pipe within the outer tube, and the region in described interior pipe is Produced Liquid passage II, and the region between described outer tube and interior pipe is injection liquid passage, and the region between described outer tube and sleeve pipe is Produced Liquid passage I; An oil pipe in described parallel double oil pipe is injection liquid passage, and another root oil pipe is Produced Liquid passage II, and the region between described parallel double oil pipe and sleeve pipe is Produced Liquid passage I; Described injection channel end is arranged for closing;
4) described injection liquid passage and described target are injected crack to be communicated with; Described Produced Liquid passage I is communicated with described extraction crack I; Described Produced Liquid passage II is communicated with described extraction crack II;
5) displacement of reservoir oil agent enters described target injection crack along described injection liquid passage, and infiltrate oil reservoir, inject both sides, crack displace crude oil to described target and enter described extraction crack I and extraction crack II, finally along described Produced Liquid passage I and Produced Liquid passage II extraction.
Preferred according to the present invention, the end at described double-deck concentric oil tubes or parallel double oil pipe: the endcapped of injection liquid passage described in it is arranged, and described in it, Produced Liquid passage II end is communicated with described extraction crack II; Described injection liquid channel setting has and injects the relative sieve tube segment in crack with described target, injects crack be communicated with described target, is formed and injects flow-guiding channel; Described Produced Liquid passage I is communicated with described extraction crack I.
Preferred according to the present invention, in described step 1) select before to be suitable for the hypotonic or compact oil reservoir of carrying out horizontal well pit shaft staged fracturing.Preferably, described core intersection is greater than 10m.
Preferred according to the present invention, described step 1) in, described horizontal well pit shaft is drilled to along minimum horizontal principal stress direction, stratum, and described horizontal well pit shaft is positioned at oil reservoir middle and lower part.Preferably, Horizontal Well tube length degree is greater than 100 meters, requires that exploitation oil reservoir position is not containing edge-bottom water.Probably be partially formed water cone at horizontal well pit shaft due to edge-bottom water or cause quick water logging, causing large volume production water, therefore require described oil reservoir not containing edge-bottom water; Horizontal well pit shaft is in order to subsequent implementation staged fracturing to form the radial fissure perpendicular to horizontal well pit shaft along minimum horizontal principal stress direction, stratum.
Preferred according to the present invention, described step 1) in, by the segmentation of described horizontal well pit shaft, note the advantage of adopting, every segment length scope 30m-150m for giving full play to same layer.According to reservoir physical property, horizontal well pit shaft is divided into some sections, pressure break is carried out in segmentation.
Preferred according to the present invention, described step 5) in, continue to inject displacement of reservoir oil agent, when crude output drops to below economic flow rate, reselect three adjacent cracks and adopt crack as one group of new note, namely step 2 is repeated)-step 5), until exploited the crude oil of whole Crack Control of described horizontal well pit shaft.
Preferred according to the present invention, described displacement of reservoir oil agent is that note adopts liquid or note gas production body.
The present invention has following beneficial effect:
1, with by Injection Well compared with extraction well crude oil extraction, fluid infusion pressure of the present invention does not affect by well spacing, can determine crack interval according to reservoir physical property, is convenient to control injection production pressure difference and displacement intensity.
2, with utilize compared with stratum elastic energy exhaustion formula develops, the present invention supplements stratum energy by injecting fluid, and the crude oil extraction of displacement simultaneously, has increased substantially oil recovery factor.
3, the present invention is in the opening well and making production stage, due to the existence of fracturing fracture, area of passage increases, the flow resistance injecting fluid and crude oil significantly reduces, significantly reduce fluid infusion pressure, improve the fluid ability of crude oil, simultaneously drainage area increases, and improves crude output and the development effectiveness of hypotonic, compact oil reservoir.
4, the present invention can reach the dual-use function simultaneously injecting fluid and oil recovery by single port horizontal well pit shaft, slow down the restriction of oil well quantity to oilfield stimulation, thus greatly reduces oil field development cost.
5, the present invention adopts the combination in crack by note and exploits piecemeal, and to greatest extent oil well can be controlled the crude oil extraction of oil reservoir, oil recovery factor is high.
Accompanying drawing illustrates:
Fig. 1 is that double-deck concentric oil tubes note of the present invention adopts principle schematic;
In Fig. 1,1-oil reservoir border; 2-sleeve pipe; The outer tube of the double-deck concentric oil tubes of 3-; The interior pipe of the double-deck concentric oil tubes of 4-; The flow direction of 5-1-fluid; The flow direction of 5-2-crude oil; 6-sieve tube segment; 7-oil reservoir; 8-straight well section; 9-fracturing fracture a (being chosen as extraction crack II); 10-fracturing fracture b (be chosen as target and inject crack); 11-fracturing fracture c (being chosen as extraction crack I); 12-fracturing fracture d; 13-fracturing fracture e; 14-fracturing fracture f; 15-packer; 16-packer; 17-packer.
Fig. 2 is that the note of double-deck concentric oil tubes of the present invention after conversion note adopts crack adopts principle schematic;
In Fig. 2,1-oil reservoir border; 2-sleeve pipe; The outer tube of the double-deck concentric oil tubes of 3-; The interior pipe of the double-deck concentric oil tubes of 4-; The flow direction of 5-1-fluid; The flow direction of 5-2-crude oil; 6-sieve tube segment; 7-oil reservoir; 8-straight well section; 9-fracturing fracture a; 10-fracturing fracture b; 11-fracturing fracture c; 12-fracturing fracture d (being chosen as extraction crack II); 13-fracturing fracture e (be chosen as target and inject crack); 14-fracturing fracture f (being chosen as extraction crack I); 15-packer; 16-packer; 17-packer.
Fig. 3 is that parallel double oil pipe of the present invention note adopts principle schematic;
In Fig. 3,1-oil reservoir border; 2-sleeve pipe; A pipe in 3-1-parallel double oil pipe; B pipe in 4-1-parallel double oil pipe; The flow direction of 5-1-fluid; The flow direction of 5-2-crude oil; 6-sieve tube segment; 7-oil reservoir; 8-straight well section; 9-fracturing fracture a (being chosen as extraction crack II); 10-fracturing fracture b (be chosen as target and inject crack); 11-fracturing fracture c (being chosen as extraction crack I); 12-fracturing fracture d; 13-fracturing fracture e; 14-fracturing fracture f; 15-packer; 18-is used for the plug closed.
Fig. 4 is that the note of parallel double oil pipe of the present invention after conversion note adopts crack adopts principle schematic;
In Fig. 4,1-oil reservoir border; 2-sleeve pipe; The A pipe of 3-1-parallel double oil pipe; The B pipe of 4-1-parallel double oil pipe; The flow direction of 5-1-fluid; The flow direction of 5-2-crude oil; 6-sieve tube segment; 7-oil reservoir; 8-straight well section; 9-fracturing fracture a; 10-fracturing fracture b; 11-fracturing fracture c; 12-fracturing fracture d (being chosen as extraction crack II); 13-fracturing fracture e (be chosen as target and inject crack); 14-fracturing fracture f (being chosen as extraction crack I); 15-packer; 18-is used for the plug closed.
Detailed description of the invention:
Below in conjunction with embodiment and Figure of description, the present invention is described in detail, but is not limited thereto.
As Figure 1-4.
Embodiment 1,
A kind of staged fracturing of horizontal well single-well injection-production oil production method, comprising:
1) to horizontal well pit shaft staged fracturing: form many radial fracturing fractures perpendicular to horizontal well pit shaft;
2) in described crack, three adjacent cracks are chosen: being positioned at middle is target injection crack; Be positioned at the crack that described target injects both sides, crack, and respectively be extraction crack I and extraction crack II along injection liquid injection direction; As shown in Figure 1, select fracturing fracture a9 to be extraction crack II, select fracturing fracture b10 to be that target is injected crack, selected fracturing fracture c11 to be extraction crack I;
3) double-deck concentric oil tubes or parallel double oil pipe are installed: the space in described sleeve pipe 2 is divided into Produced Liquid passage I, injection liquid passage and Produced Liquid passage II in the sleeve pipe in horizontal well pit shaft; As shown in Figure 1, 2, described double-deck concentric oil tubes comprises outer tube 3 and sheathed interior pipe 4 within the outer tube, region in described interior pipe 4 is Produced Liquid passage II, and the region between described outer tube 3 and interior pipe 4 is injection liquid passage, and the region between described outer tube 4 and sleeve pipe 2 is Produced Liquid passage I; As shown in Figure 3,4, an oil pipe in described parallel double oil pipe is injection liquid passage, is the A pipe 3-1 of parallel double oil pipe, and another root oil pipe is Produced Liquid passage II, be the B pipe 4-1 of parallel double oil pipe, the region between described parallel double oil pipe and sleeve pipe 2 is Produced Liquid passage I; Described injection channel end is arranged for closing: in the present embodiment, in described double-deck concentric oil tubes, injection channel end is packer 16, and in described parallel double oil pipe, injection channel end is the plug 18 for closing;
4) described injection liquid passage and described target are injected crack to be communicated with; Described Produced Liquid passage I is communicated with described extraction crack I; Described Produced Liquid passage II is communicated with described extraction crack II;
5) displacement of reservoir oil agent enters described target injection crack along described injection liquid passage, and infiltrate oil reservoir, inject both sides, crack displace crude oil to described target and enter described extraction crack I and extraction crack II, finally along described Produced Liquid passage I and Produced Liquid passage II extraction.
End at described double-deck concentric oil tubes or parallel double oil pipe: the endcapped of injection liquid passage described in it is arranged, and described in it, Produced Liquid passage II end is communicated with described extraction crack II; Described injection liquid channel setting has and injects the relative sieve tube segment in crack with described target, injects crack be communicated with described target, is formed and injects flow-guiding channel; Described Produced Liquid passage I is communicated with described extraction crack I.
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, described step 5) in, continue to inject fluid, when crude output drops to below economic flow rate, reselect three adjacent cracks and adopt crack as one group of new note, namely repeat step 2)-step 5), until exploited the crude oil of whole Crack Control of described horizontal well pit shaft.As shown in Figure 2, select fracturing fracture d12 to be extraction crack II, select fracturing fracture e13 to be that target is injected crack, selected fracturing fracture f14 to be 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 described step 1) select before to be suitable for the hypotonic or compact oil reservoir of carrying out horizontal well pit shaft staged fracturing, preferred LOW PERMEABILITY RESERVOIR herein, its permeability 15 millidarcy, core intersection 20 meters, oil reservoir is not containing edge-bottom water.
Described step 1) in, described horizontal well pit shaft is drilled to along minimum horizontal principal stress direction, stratum, and described horizontal well pit shaft is positioned at oil reservoir middle and lower part.Preferred levels well shaft length is 600 meters herein, requires that exploitation oil reservoir position is not containing edge-bottom water.Probably be partially formed water cone at horizontal well pit shaft due to edge-bottom water or cause quick water logging, causing large volume production water, therefore require described oil reservoir not containing edge-bottom water; Horizontal well pit shaft is in order to subsequent implementation staged fracturing to form the radial fissure perpendicular to horizontal well pit shaft along minimum horizontal principal stress direction, stratum.Described horizontal well pit shaft is divided into 6 sections, herein preferred every segment length 100m.According to reservoir physical property, horizontal well pit shaft is divided into some sections, pressure break is carried out in segmentation.Development scheme described herein is waterflooding extraction.
Embodiment 4,
A kind of staged fracturing of horizontal well single-well injection-production oil production method as described in embodiment 1-3, in described step 1) select before to be suitable for the hypotonic or compact oil reservoir of carrying out horizontal well pit shaft staged fracturing, preferred compact oil reservoir herein, its permeability 0.1 millidarcy, core intersection 50 meters, oil reservoir is not containing edge-bottom water.
Described step 1) in, described horizontal well pit shaft is drilled to along minimum horizontal principal stress direction, stratum, and described horizontal well pit shaft is positioned 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, carries out staged fracturing, every segment length 50m, forms 20 radial fracturing fractures perpendicular to horizontal well pit shaft.Injection fluid described herein is CO
2.
Claims (8)
1. a staged fracturing of horizontal well single-well injection-production oil production method, is characterized in that, this oil production method comprises:
1) to horizontal well pit shaft staged fracturing: form many radial fracturing fractures perpendicular to horizontal well pit shaft;
2) in described crack, three adjacent cracks are chosen: being positioned at middle is target injection crack; Be positioned at the crack that described target injects both sides, crack, and respectively be extraction crack I and extraction crack II along injection liquid injection direction;
3) double-deck concentric oil tubes or parallel double oil pipe are installed: the space in described sleeve pipe is divided into Produced Liquid passage I, injection liquid passage and Produced Liquid passage II in the sleeve pipe in horizontal well pit shaft; Described double-deck concentric oil tubes comprises outer tube and sheathed interior pipe within the outer tube, and the region in described interior pipe is Produced Liquid passage II, and the region between described outer tube and interior pipe is injection liquid passage, and the region between described outer tube and sleeve pipe is Produced Liquid passage I; An oil pipe in described parallel double oil pipe is injection liquid passage, and another root oil pipe is Produced Liquid passage II, and the region between described parallel double oil pipe and sleeve pipe is Produced Liquid passage I; Described injection channel end is arranged for closing;
4) described injection liquid passage and described target are injected crack to be communicated with; Described Produced Liquid passage I is communicated with described extraction crack I; Described Produced Liquid passage II is communicated with described extraction crack II;
5) displacement of reservoir oil agent enters described target injection crack along described injection liquid passage, and infiltrate oil reservoir, inject both sides, crack displace crude oil to described target and enter described extraction crack I and extraction crack II, finally along described Produced Liquid passage I and Produced Liquid passage II extraction.
2. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 1, it is characterized in that, end at described double-deck concentric oil tubes or parallel double oil pipe: the endcapped of injection liquid passage described in it is arranged, and described in it, Produced Liquid passage II end is communicated with described extraction crack II; Described injection liquid channel setting has and injects the relative sieve tube segment in crack with described target, injects crack be communicated with described target, is formed and injects flow-guiding channel; Described Produced Liquid passage I is communicated with described extraction crack I.
3. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 1, is characterized in that, in described step 1) select the hypotonic or compact oil reservoir being suitable for carrying out horizontal well pit shaft staged fracturing before.
4. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 3, it is characterized in that, described step 1) in, described horizontal well pit shaft is drilled to along minimum horizontal principal stress direction, stratum, and described horizontal well pit shaft is positioned at oil reservoir middle and lower part.
5. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 4, it is characterized in that, Horizontal Well tube length degree is greater than 100 meters, requires that exploitation oil reservoir position is not containing edge-bottom water.
6. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 5, is characterized in that, described step 1) in, by the segmentation of described horizontal well pit shaft, every segment length scope 30m-150m.
7. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 1, it is characterized in that, described step 5) in, continue to inject displacement of reservoir oil agent, when crude output drops to below economic flow rate, reselect three adjacent cracks and adopt crack as one group of new note, namely repeat step 2)-step 5), until exploited the crude oil of whole Crack Control of described horizontal well pit shaft.
8. a kind of staged fracturing of horizontal well single-well injection-production oil production method according to claim 1, is characterized in that, described displacement of reservoir oil agent is that note adopts liquid or note gas production body.
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| 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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| CN105114048B CN105114048B (en) | 2017-10-13 |
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