CN102364041B - Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture - Google Patents
Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture Download PDFInfo
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- CN102364041B CN102364041B CN201110329440.8A CN201110329440A CN102364041B CN 102364041 B CN102364041 B CN 102364041B CN 201110329440 A CN201110329440 A CN 201110329440A CN 102364041 B CN102364041 B CN 102364041B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 239000004576 sand Substances 0.000 title claims abstract description 33
- 238000000605 extraction Methods 0.000 title abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 108
- 238000002347 injection Methods 0.000 claims abstract description 33
- 239000007924 injection Substances 0.000 claims abstract description 33
- 239000010779 crude oil Substances 0.000 claims abstract description 10
- 239000003129 oil well Substances 0.000 claims abstract description 7
- 239000003208 petroleum Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 235000019198 oils Nutrition 0.000 claims description 92
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 238000009738 saturating Methods 0.000 claims description 16
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 10
- 240000005373 Panax quinquefolius Species 0.000 claims description 10
- 238000011084 recovery Methods 0.000 claims description 10
- 235000019476 oil-water mixture Nutrition 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 11
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000004391 petroleum recovery Methods 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 241000184339 Nemophila maculata Species 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/80—Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open
-
- 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
- E21B43/04—Gravelling of 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
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- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
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- Organic Chemistry (AREA)
- Edible Oils And Fats (AREA)
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Abstract
The invention discloses an oil extraction method for establishing an oil permeable water stop sieve by filling fusheng sand in a horizontal well fracture, and relates to a new method for petroleum exploitation. The fusheng sand with an oil permeable and water stop function is filled in a horizontal well vertical fracture in the middle of a water injection well row and an oil extraction well row to serve as a supporting agent, so that an oil permeable and water stop sieve is formed in the middle of a water injection well and an oil extraction well, and a petroleum exploitation region is partitioned into a water injection region and an oil extraction region by the oil permeable and water stop sieve. Under the action of injection water pressure, when oil and water mixture passes through the oil permeable and water stop sieve, water is intercepted at the water injection region, and crude oil is then gathered on one side of the oil extraction region of the sieve through the sieve. After all petroleum of the water injection region completely passes through the sieve to enter the oil extraction region, the water injection pressure of the water injection region is abruptly increased, so that the sieve becomes a water permeable sieve, and the permeated water continuously pushes remaining oil at the oil extraction region to enter the oil well. By using the method, most of remaining oil of an oil field can be extracted, so that the petroleum recovery ratio is close to 100 percent.
Description
Technical field
The invention belongs to oil exploitation, particularly a kind of fractured horizontal well seam is filled to inspire confidence in and is contained the oil production method that sand is set up oily water stop sieve.
Background technology
Along with a large amount of consumption of oil, oil is as a kind of important derived energy chemical raw material worsening shortages, but because oil reservoir produced water cut is more and more higher, main force's oil field comprehensive water cut such as grand celebration approach 94%, make to also have more than 50% oil of oil in place to exploit under prior art condition, cost of winning is increased year by year.Fracturing technique is to improve the major measure of oil well output, but at high water-cut stage, pressure break easily causes water logging, in order to control the moisture rising of oil field production fluid, by sand film coating technique, make normal sands there is the water surface tension of enhancing and destroy oily capillary function, thereby the Sheng sand that inspires confidence in oily water stop function is arisen at the historic moment.But its saturating oily water stop function selectively under different displacement pressures, show great difference, when displacement pressure is extremely low, water completely can not see through and inspire confidence in Sheng sand, when high displacement pressure, still with large water gaging, can pass through, that is to say the rising along with displacement pressure, its saturating oily water stop function dies down, this also can be verified from its experimental data, in Table one:
At profit, with driving in a hurdle, when displacement pressure is from 0.025 MPa is increased to 0.048 MPa, in efflux, profit volume ratio is changed to 5.8:4.2 by 6:4.This variation explanation, along with the rising of displacement pressure, the saturating oily water stop function that inspires confidence in Sheng sand is reducing.By prior art, moisture for controlling production fluid, inspire confidence in and contain the proppant that sand is used directly as wellfracturing seam, because the immense pressure in oil reservoir in oil recovery process and oil well pump standing valve well-sinking is poor, make a large amount of water be pressed into pit shaft through inspiring confidence in Sheng sand, thereby its saturating oily water stop function is had a greatly reduced quality.
For avoiding inspiring confidence in, contain the sand problem that functional oil reduces that blocks water under high displacement pressure, in the urgent need to setting up a kind of new inspiring confidence in, contain sand application process, to give full play to inspire confidence in, contain sand excellent water stop function under low driving pressure, make water completely can not see through and inspire confidence in Sheng sand.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, and provide a kind of fractured horizontal well seam to fill to inspire confidence in, contains the oil production method that sand is set up oily water stop sieve.
Fractured horizontal well seam of the present invention is filled to inspire confidence in and is contained the oil production method that sand is set up oily water stop sieve, the vertical perforation of horizontal well one by one the pressure break between row of water injector and oil recovery well array, in pressure break gap, fill and there is inspiring confidence in of oily water stop function and contain sand and cook proppant, set up saturating oily water stop sieve together and carry out filter oil aqueous mixtures.
As a further improvement on the present invention, the vertical pressure break of described horizontal well be oil reservoir between row of water injector and oil recovery well array by perpendicular to minimally stress direction horizontal well drilling, to carrying out pressure break after its vertical intensive perforation.
As a further improvement on the present invention, described saturating oily water stop sieve is to inject and inspire confidence in Sheng sand in the vertical pressure-break of horizontal well one by one, this saturating oily water stop sieve is separated into water filling district and oil-producing region by ancestral petroleum mining area, under water injection pressure drives, oil water mixture is when by sieve, crude oil sees through sieve and accumulates in oil-producing region one side, and water is trapped within water filling district; The whole oil in water filling district see through sieve and enter after oil-producing region, because do not have crude oil to pass through sieve, water filling district water injection pressure are suddenly raise, and make that sieve is breakdown becomes permeable sieve, see through remaining oil that the water coming continues to promote oil-producing region and drive to oil well and be plucked out of.
As a further improvement on the present invention, oil-producing region Produced Liquid Water-Content Rise to a certain extent after, change note and adopt direction, change former producing well into water injection well again, water injection well changes producing well into, under water injection pressure effect, former oil-producing region most of surplus oil sees through sieve and accumulates in opposite side, treat to pass through sieve without crude oil, when water injection pressure can suddenly raise, cut off water injection well, change producing well into water injection well, horizontal well changes producing well into, the remaining oil that accumulates in sieve side sees through under pressure pressure-break and enters horizontal well, by oily extraction.
Fractured horizontal well of the present invention seam is filled to inspire confidence in and is contained the oil production method that sand is set up oily water stop sieve, overcome existing under high driving pressure application inspire confidence in the defect of containing sand, superpower water stop function while giving full play to its low-voltage driving.Manufacturing process according to water injection well displacement of reservoir oil by filling water to producing well extraction, by in the vertical pressure-break of horizontal well between row of water injector and oil recovery well array, fill there is oily water stop function inspire confidence in Sheng sand, set up the sieve that can filter oil water mixture together, sieves is divided into water filling district and oil-producing region by production area.This sieve in process of production poor estimated value of pressure at both sides only has 0.0025MPa, can make full use of to inspire confidence in to contain the strict water stop function that sand has when low-voltage driving, make oil see through the oil-producing region side that sieve accumulates in sieve, and water is trapped within water filling district.Until water filling district, whole remaining oils enter after oil-producing region, and owing to not having crude oil to pass through sieve, water filling district internal pressure can suddenly raise, and makes sieve become permeable sieve, through the oil in the water continuation promotion oil-producing region of sieve, enter producing well.Until oil-producing region Produced Liquid Water-Content Rise after certain altitude, should change former water injection well into producing well, former producing well changes water injection well into, namely former oil-producing region becomes water filling district, original annotation pool changes oil-producing region into, makes former oil-producing region remaining oil oppositely see through the opposite side that sieve accumulates in sieve.And then water injection well is cut off and oil well changes water injection well into and horizontal well changes producing well into, the oil that makes to accumulate in compass screen surface sees through pressure-break and enters horizontal well and be plucked out of under water injection pressure effect.Conversion between this water filling district and oil-producing region, has changed the direction that liquid circulation is sifted out, thereby has realized the effect that sieve moves left and right in oil reservoir, and its both sides remaining oil filters rear extraction the most at last, makes recovery ratio approach 100%.
In fractured horizontal well of the present invention seam, fill to inspire confidence in and contain sand to set up the oil production method of oily water stop sieve reasonable in design, in oil recovery industry, reduce water yield, improved oil production, small investment, high efficiency.
Accompanying drawing explanation
Fig. 1 sets up oily water stop sieve and first stage manufacturing process cross-sectional drawing in oil reservoir;
Fig. 2 sets up oily water stop sieve and second stage manufacturing process cross-sectional drawing in oil reservoir;
Fig. 3 sets up oily water stop sieve and phase III manufacturing process cross-sectional drawing in oil reservoir;
Fig. 4 is the floor map of oily water stop sieve and first stage manufacturing process;
Fig. 5 for perpendicular to level minimally the vertical perforation of stress level section set up Vertical Cracks figure;
Fig. 6 Five-point method pattern located level well northeast～southwest is to layout;
Fig. 7 Five-point method pattern located level well northwest～southeastern direction layout;
Fig. 8 Five-point method pattern located level well North and South direction layout;
Fig. 9 Five-point method pattern located level well east-west direction layout;
In figure: 1, water injection well; 2, horizontal well vertical section; 3, producing well; 4, water filling district; 5, oil-producing region; 6, filter front remaining oil; 7, filter rear remaining oil; 8, horizontal well horizontal segment; 9, saturating oily water stop sieve; 10, former oil-producing region remaining oil; 11, by the oil of horizontal well extraction; 12, vertical stress; 13, vertical fractures; 14, level stress direction minimally; 15, dead well.
The specific embodiment
Fractured horizontal well seam of the present invention is filled to inspire confidence in and is contained the oil production method that sand is set up oily water stop sieve, it is characterized in that the vertical perforation of horizontal well one by one pressure break between row of water injector and oil recovery well array, in pressure break gap, fill and there is inspiring confidence in of oily water stop function and contain sand and cook proppant, set up saturating oily water stop sieve together and carry out filter oil aqueous mixtures.
The described vertical pressure break of horizontal well of the present invention be oil reservoir between row of water injector and oil recovery well array by perpendicular to minimally stress direction horizontal well drilling, to carrying out pressure break after its vertical intensive perforation.
Described saturating oily water stop sieve of the present invention is to inject and inspire confidence in Sheng sand in the vertical pressure-break of horizontal well one by one, this saturating oily water stop sieve is separated into water filling district and oil-producing region by ancestral petroleum mining area, under water injection pressure drives, oil water mixture is when by sieve, crude oil sees through sieve and accumulates in oil-producing region one side, and water is trapped within water filling district; The whole oil in water filling district see through sieve and enter after oil-producing region, because do not have crude oil to pass through sieve, water filling district water injection pressure is suddenly raise, make that sieve is breakdown becomes permeable sieve, the remaining oil that sees through the water continuation promotion oil-producing region coming drives to oil well and is plucked out of, as shown in Figure 1.
Oil-producing region Produced Liquid Water-Content Rise to a certain extent after, change note and adopt direction, change former producing well into water injection well again, water injection well changes producing well into, under water injection pressure effect, former oil-producing region most of surplus oil sees through sieve and accumulates in opposite side, treat to pass through sieve without crude oil, when water injection pressure can suddenly raise, as shown in Figure 2, at this moment will cut off in time water injection well, change producing well into water injection well, horizontal well changes producing well into, the remaining oil that accumulates in sieve side sees through under pressure pressure-break and enters horizontal well, by oily extraction, as shown in Figure 3.
The spread shape of saturating oily water stop sieve in oil reservoir is subject to the control of fractured horizontal well seam completely.For making sieve be the vertical guide perpendicular to water (flow) direction in oil reservoir, horizontal well horizontal segment must only carry out vertical upper and lower intensive perforation, and the trend of horizontal segment will be as far as possible minimally stress direction is vertical with the level on stratum, as shown in Figure 5.
While only carrying out vertical perforating and fracturing, gravity fracture opens that to split aspect effect little, can make crack downwards, let droop to extension; Intensive perforation and horizontal segment perpendicular to level minimally stress can make fracture surface perpendicular to water (flow) direction (namely along horizontal segment direction).So just can access our needed fracture shape, inject to inspire confidence in to contain and just obtained the saturating oily water stop sieve wanted after sand.
Most of well pattern is five-spot areal well pattern.For guaranteeing that horizontal well horizontal segment is perpendicular to minimum level stress direction, take Daqing oil field as example, its net horizontal section has four kinds of laying trends to select, refer to Fig. 6～Fig. 9, when wherein north-south and East and West direction are laid, need change Five-point method pattern into line pattern, oblique well spacing does not need to adjust well pattern.The principle of selecting in four kinds of layings is to guarantee that horizontal segment is perpendicular to level stress minimally as far as possible, thereby makes pressure-break meet the requirement of laying compass screen surface.
Concrete large the grade on a small scale of compass screen surface should be definite in conjunction with the geological conditions of there and then, and the length of compass screen surface is general identical with horizontal section length, and domestic current horizontal segment maximum length has reached 2800m; The height of compass screen surface should with single major oil reservoir consistency of thickness, or consistent with multiple zone sandstone gross thickness.
In addition; at peupendicular hole, can be pressed into the area of Vertical Cracks; utilize peupendicular hole vertical setting of types perforation pressure break; also can extrude the fracture surface perpendicular to water (flow) direction; filling also can become the sieve with filtration oil function after inspiring confidence in Sheng sand; technician can be according to local well pattern layout and geological conditions flexible Application, but its core technology is all in this patent protection domain.
Claims (2)
1. fractured horizontal well seam is filled to inspire confidence in and is contained the oil production method that sand is set up oily water stop sieve, it is characterized in that the vertical pressure break of horizontal well one by one between row of water injector and oil recovery well array, in pressure break gap, fill and there is inspiring confidence in of oily water stop function and contain sand and cook proppant, set up saturating oily water stop sieve together and carry out filter oil aqueous mixtures; Described saturating oily water stop sieve is to inject and inspire confidence in Sheng sand in the vertical pressure-break of horizontal well one by one, this saturating oily water stop sieve is separated into water filling district and oil-producing region by ancestral petroleum mining area, under water injection pressure drives, oil water mixture is when by sieve, crude oil sees through sieve and accumulates in oil-producing region one side, and water is trapped within water filling district; The whole oil in water filling district see through sieve and enter after oil-producing region, because do not have crude oil to pass through sieve, water filling district water injection pressure are suddenly raise, and make that sieve is breakdown becomes permeable sieve, see through remaining oil that the water coming continues to promote oil-producing region and drive to oil well and be plucked out of.
2. fractured horizontal well seam as claimed in claim 1 is filled to inspire confidence in and is contained the oil production method that sand is set up oily water stop sieve, it is characterized in that the described vertical pressure break of horizontal well is oil reservoir between row of water injector and oil recovery well array by perpendicular to stress direction horizontal well drilling minimally, to carrying out pressure break after its vertical intensive perforation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110329440.8A CN102364041B (en) | 2011-10-26 | 2011-10-26 | Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture |
| PCT/CN2012/083425 WO2013060270A1 (en) | 2011-10-26 | 2012-10-24 | Oil extraction method of establishing oil-permeable water-resistant sieve by filling fusheng sand into fracture of horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110329440.8A CN102364041B (en) | 2011-10-26 | 2011-10-26 | Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture |
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| CN102364041A CN102364041A (en) | 2012-02-29 |
| CN102364041B true CN102364041B (en) | 2014-03-26 |
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| CN102364041B (en) * | 2011-10-26 | 2014-03-26 | 王胜存 | Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture |
| CN103045374A (en) * | 2012-12-17 | 2013-04-17 | 张家港市鸿钻贸易有限公司 | Method for refining biodiesel |
| CN103628848B (en) * | 2013-12-02 | 2016-09-07 | 中国地质大学（武汉） | Multidirectional interlayer displacement in flooding oil production method and system |
| CN113622888A (en) * | 2020-05-06 | 2021-11-09 | 中国石油化工股份有限公司 | Dry hot rock development method and system for three-dimensional horizontal mining and injection well pattern |
| CN111927421B (en) * | 2020-08-18 | 2022-07-15 | 中国石油化工股份有限公司 | Repeated fracturing well selection method based on shale gas unstable linear flow theory |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418755A (en) * | 1979-02-14 | 1983-12-06 | Conoco Inc. | Methods of inhibiting the flow of water in subterranean formations |
| CN1614193A (en) * | 2004-12-01 | 2005-05-11 | 大庆油田有限责任公司 | Fracturing method for improving recovering ratio by phase permeability improver |
| CN101289932A (en) * | 2007-04-17 | 2008-10-22 | 长江大学 | Straight-line parallel flow water injection oil extraction method |
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|---|---|---|---|---|
| CN100467826C (en) * | 2005-07-14 | 2009-03-11 | 王胜存 | Method for extracting residue oil by injecting profile control agent to norizontal well for blocking water injection path of oil reservoir |
| US7493957B2 (en) * | 2005-07-15 | 2009-02-24 | Halliburton Energy Services, Inc. | Methods for controlling water and sand production in subterranean wells |
| CN1991127A (en) * | 2005-12-30 | 2007-07-04 | 许靖华 | Method for improving crude oil recovery efficiency through three-dimensional water injection between horizontal wells having two human crack surfaces |
| EA016864B1 (en) * | 2008-01-31 | 2012-08-30 | Шлюмбергер Текнолоджи Б.В. | Method of hydraulic fracturing of horizontal wells, resulting in increased production |
| CN101586024A (en) * | 2008-05-21 | 2009-11-25 | 北京仁创科技集团有限公司 | Kind of laminated granule for oil extraction, proppant and oil extraction method using the proppant |
| US20110005752A1 (en) * | 2008-08-14 | 2011-01-13 | Baker Hughes Incorporated | Water Sensitive Porous Medium to Control Downhole Water Production and Method Therefor |
| CN102199422B (en) * | 2010-03-26 | 2013-07-10 | 北京仁创科技集团有限公司 | Fracturing propping agent, preparation method thereof, and deep well fracturing method |
| CN102364041B (en) * | 2011-10-26 | 2014-03-26 | 王胜存 | Oil extraction method for establishing oil permeable water stop sieve by filling fusheng sand in horizontal well fracture |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4418755A (en) * | 1979-02-14 | 1983-12-06 | Conoco Inc. | Methods of inhibiting the flow of water in subterranean formations |
| CN1614193A (en) * | 2004-12-01 | 2005-05-11 | 大庆油田有限责任公司 | Fracturing method for improving recovering ratio by phase permeability improver |
| CN101289932A (en) * | 2007-04-17 | 2008-10-22 | 长江大学 | Straight-line parallel flow water injection oil extraction method |
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| CN102364041A (en) | 2012-02-29 |
| WO2013060270A1 (en) | 2013-05-02 |
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Granted publication date: 20140326 |