CN102364041A - 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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- CN102364041A CN102364041A CN2011103294408A CN201110329440A CN102364041A CN 102364041 A CN102364041 A CN 102364041A CN 2011103294408 A CN2011103294408 A CN 2011103294408A CN 201110329440 A CN201110329440 A CN 201110329440A CN 102364041 A CN102364041 A CN 102364041A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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- 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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, the filling of particularly a kind of fractured horizontal well seam inspires confidence in the foundation of Sheng sand and passes through the oil production method that oil blocks water and sieves.
Background technology
Along with a large amount of consumption of oil; Oil is as a kind of important energy industrial chemicals worsening shortages; But because the oil reservoir produced water cut is increasingly high; Main force's oil field comprehensive water cut such as grand celebration make to also have the oil more than 50% of oil in place to exploit under the prior art condition near 94%, and 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 is prone to cause water logging, in order to control oil field production fluid rise of water cut, through the sand film coating technique; Normal sands is had strengthen water surface tension and destroy the function of oil surface tension force, have inspiring confidence in of oily water stop function and contain sand and arise at the historic moment thereby make.But its selectivity of passing through oily water stop function shows great difference under different displacement pressures, and when displacement pressure was extremely low, water can not see through fully and inspire confidence in Sheng sand; When high displacement pressure; Still can pass through with big water gaging, that is to say the rising along with displacement pressure, it passes through oily water stop function and dies down; This also can obtain checking from its experimental data, see table one:
With driving in the hurdle, after displacement pressure was increased to 0.048 MPa from 0.025 MPa, the profit volume ratio was changed to 5.8:4.2 by 6:4 in the outflow liquid at profit.This variation explanation along with the rising of displacement pressure, inspires confidence in the oily water stop function that passes through of containing sand and is reducing.By prior art; Moisture for the control production fluid, inspire confidence in and contain the proppant that sand is used directly as the wellfracturing seam, owing to the immense pressure in oil reservoir in the oil recovery process and the oil well pump standing valve well-sinking is poor; Make a large amount of water be pressed into pit shaft, have a greatly reduced quality thereby make it pass through oily water stop function through inspiring confidence in Sheng sand.
Contain the sand problem that functional oil reduces that under high displacement pressure, blocks water for avoiding inspiring confidence in, press for and set up a kind of new inspiring confidence in and contain the sand application process, contain sand at the low driving pressure water stop function of excellence down, make the water fully can not be through inspiring confidence in Sheng sand to give full play to inspire confidence in.
Summary of the invention
The present invention is intended to overcome the deficiency of prior art, passes through the oil production method that oil blocks water and sieves and provide the filling of a kind of fractured horizontal well seam to inspire confidence in the foundation of Sheng sand.
Fractured horizontal well seam of the present invention filling inspires confidence in the foundation of Sheng sand and passes through the oil production method that oil blocks water and sieves; Be vertical perforation of horizontal well one by one and the pressure break between row of water injector and oil recovery well array; In the pressure break slit, fill and have inspiring confidence in of oily water stop function and contain sand and cook proppant, set up and pass through the oil sieve that blocks water together and come the filter oil aqueous mixtures.
As further improvement of the present invention, vertical perforation of described horizontal well and pressure break be between row of water injector and oil recovery well array oil reservoir by perpendicular to minimum stress direction horizontal well drilling, to carrying out pressure break behind its vertical intensive perforation.
As further improvement of the present invention; The described oil sieve that blocks water is in the vertical pressure-break of horizontal well one by one, to inject to inspire confidence in Sheng sand; Oil blocks water to sieve ancestral petroleum mining area is separated into water filling district and oil-producing region thoroughly, and under water injection pressure drove, oil water mixture was through sieve the time; Crude oil sees through sieve and accumulates in oil-producing region one side, and water is trapped within the water filling district; After the whole oil in water filling district see through sieve and get into oil-producing region,, water filling district water injection pressure is suddenly raise, make that sieve is breakdown to become permeable sieve, see through the remaining oil that the water that comes continues to promote oil-producing region and drive to oil well and by extraction because there is not crude oil to pass through sieve.
As further improvement of the present invention, oil-producing region extraction liquid is moisture rise to a certain degree after, change to annotate and to adopt direction; Again with former producing well change water injection well into, water injection well changes producing well into, under the water injection pressure effect, the most of remaining oil of former oil-producing region sees through sieve and accumulates in opposite side; Wait not have crude oil through sieve, 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, and the remaining oil that accumulates in the sieve side sees through pressure-break under pressure and gets into horizontal well, with oily extraction.
Fractured horizontal well of the present invention seam is filled to inspire confidence in and is contained sand and set up and pass through the block water oil production method of sieve of oil, has overcome to have now and under high driving pressure, has used the defective that inspires confidence in Sheng sand, superpower water stop function when giving full play to its low-voltage driving.According to the manufacturing process of water injection well displacement of reservoir oil by filling water to the producing well extraction; Through fill in the vertical pressure-break of horizontal well between row of water injector and the oil recovery well array have an oily water stop function inspire confidence in Sheng sand; Set up together the sieve that can filter oil water mixture, sieves is divided into water filling district and oil-producing region with the production area.This sieve estimated value of pressure at both sides difference in process of production only has 0.0025MPa, can make full use of to inspire confidence in the water stop function of containing the strictness that sand had when low-voltage driving, make oil see through the oil-producing region side that sieve accumulates in sieve, and water is trapped within the water filling district.After treating that the whole remaining oils in water filling district get into oil-producing region, owing to there is not crude oil to pass through sieve, then water filling district internal pressure can suddenly raise, and makes sieve become permeable sieve, and the oil that the water that sees through sieve continues to promote in the oil-producing region gets into producing well.After treating that oil-producing region extraction liquid is moisture and rising to certain altitude; Should change former water injection well into producing well, former producing well changes water injection well into; Just former oil-producing region becomes the water filling district, the 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 cut off and oil well changes water injection well into and horizontal well changes producing well into, make the oil that accumulates in compass screen surface see through under the water injection pressure effect that pressure-break gets into horizontal well and by extraction.Conversion between this water filling district and the oil-producing region has changed the direction of flow through sieve, thereby has realized the effect of sieve move left and right in oil reservoir, and its both sides remaining oil filters the back extraction the most at last, makes recovery ratio near 100%.
It is reasonable in design that fractured horizontal well of the present invention is stitched the interior oil production method that inspires confidence in the oily thoroughly sieve that blocks water of Sheng sand foundation of filling, and in oil recovery industry, reduces water yield, improved oil production, small investment, high efficiency.
Description of drawings
Fig. 1 passes through oil block water sieve and phase I manufacturing process cross-sectional drawing for setting up in the oil reservoir;
Fig. 2 passes through oil block water sieve and second stage manufacturing process cross-sectional drawing for setting up in the oil reservoir;
Fig. 3 passes through oil block water sieve and phase III manufacturing process cross-sectional drawing for setting up in the oil reservoir;
Fig. 4 is for passing through the floor map of oily block water sieve and phase I manufacturing process;
Fig. 5 is for setting up vertical crack pattern perpendicular to the vertical perforation of the minimum geostatic stress horizontal segment of level;
Fig. 6 Five-point method pattern is laid horizontal well northeast～southwest to layout;
Fig. 7 Five-point method pattern is laid horizontal well northwest～southeastern direction layout;
Fig. 8 Five-point method pattern is laid horizontal well North and South direction layout;
Fig. 9 Five-point method pattern is laid horizontal well east-west direction layout.
The specific embodiment
Fractured horizontal well seam of the present invention filling inspires confidence in the foundation of Sheng sand and passes through the oil production method that oil blocks water and sieves; It is characterized in that vertical perforation of horizontal well one by one and pressure break between row of water injector and oil recovery well array; In the pressure break slit, fill and have inspiring confidence in of oily water stop function and contain sand and cook proppant, set up and pass through the oil sieve that blocks water together and come the filter oil aqueous mixtures.
The vertical pressure break of described level of the present invention be between row of water injector and oil recovery well array oil reservoir by perpendicular to minimum stress direction horizontal well drilling, to carrying out pressure break behind its vertical intensive perforation.
The described oil of the present invention sieve that blocks water is in the vertical pressure-break of horizontal well one by one, to inject to inspire confidence in Sheng sand; Oil blocks water to sieve ancestral petroleum mining area is separated into water filling district and oil-producing region thoroughly; Under water injection pressure drives; Oil water mixture is through sieve the time, and crude oil sees through sieve and accumulates in oil-producing region one side, and water is trapped within the water filling district; After the whole oil in water filling district see through sieve entering oil-producing region; Because there is not crude oil to pass through sieve, water filling district water injection pressure is suddenly raise, make that sieve is breakdown to become permeable sieve; The remaining oil that sees through the water continuation promotion oil-producing region that comes drives to oil well and by extraction, and is as shown in Figure 1.
Oil-producing region extraction liquid is moisture rise to a certain degree after, change to annotate and to adopt direction, again with former producing well change water injection well into, water injection well changes producing well into; Under the water injection pressure effect, the most of remaining oil of former oil-producing region sees through sieve and accumulates in opposite side, and crude oil not had passes through sieve; When water injection pressure can suddenly raise, as shown in Figure 2, at this moment will in time cut off water injection well; Change producing well into water injection well, horizontal well changes producing well into, and the remaining oil that accumulates in the sieve side sees through pressure-break under pressure and gets into horizontal well; With oily extraction, as shown in Figure 3.
Pass through the control that the oily spread shape of sieve in oil reservoir that block water stitched by fractured horizontal well fully.For making sieve in oil reservoir, be the vertical guide perpendicular to water (flow) direction, the horizontal well horizontal segment must only carry out vertical intensive perforation up and down, and the trend of horizontal segment is vertical, as shown in Figure 5 with the minimum stress direction of the level on stratum as far as possible.
When only carrying out vertical perforating and fracturing, gravity opens to the crack that to split aspect effect little, can make the crack downwards, let droop to extension; Intensive perforation and horizontal segment can make fracture surface perpendicular to water (flow) direction (just along the horizontal segment direction) perpendicular to the minimum geostatic stress of level.So just can access our needed fracture shape, inject inspire confidence in contain just obtained wanting behind the sand pass through the oil sieve that blocks water.
Most of well pattern is the five-spot areal well pattern.For guaranteeing that the horizontal well horizontal segment is perpendicular to the minimum level stress direction; With the Daqing oil field is example; Its net horizontal section has four kinds of laying trends to select, and sees Fig. 6～Fig. 9 for details, when wherein north-south and East and West direction are laid; Need to change Five-point method pattern into line pattern, oblique well spacing then need not adjusted well pattern.The principle of selecting for use in four kinds of layings is to guarantee horizontal segment perpendicular to the minimum geostatic stress of level as far as possible, thereby makes pressure-break satisfy the requirement of laying compass screen surface.
Concrete big the grade on a small scale of compass screen surface should combine the geological conditions of there and then to confirm that the length of compass screen surface is general identical with horizontal section length, and domestic present 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; Can be pressed into the area in vertical crack at peupendicular hole; Utilize peupendicular hole vertical setting of types perforation and 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; The 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 (4)
1. fractured horizontal well is stitched to fill to inspire confidence in and is contained the oil production method that sand is set up the oily thoroughly sieve that blocks water; 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 the pressure break slit, fill and have inspiring confidence in of oily water stop function and contain sand and cook proppant, set up and pass through the oil sieve that blocks water together and come the filter oil aqueous mixtures.
2. fractured horizontal well seam as claimed in claim 1 filling inspires confidence in the foundation of Sheng sand and passes through the oil production method that oil blocks water and sieves; It is characterized in that the vertical pressure break of described level is that oil reservoir between row of water injector and oil recovery well array is by perpendicular to minimum stress direction horizontal well drilling, to carrying out pressure break behind its vertical intensive perforation.
3. according to claim 1 or claim 2 fractured horizontal well seam is filled to inspire confidence in and is contained sand and set up and pass through the block water oil production method of sieve of oil; It is characterized in that the described oil sieve that blocks water is in the vertical pressure-break of horizontal well one by one, to inject to inspire confidence in Sheng sand; Oil blocks water to sieve ancestral petroleum mining area is separated into water filling district and oil-producing region thoroughly, and under water injection pressure drove, oil water mixture was through sieve the time; Crude oil sees through sieve and accumulates in oil-producing region one side, and water is trapped within the water filling district; After the whole oil in water filling district see through sieve and get into oil-producing region,, water filling district water injection pressure is suddenly raise, make that sieve is breakdown to become permeable sieve, see through the remaining oil that the water that comes continues to promote oil-producing region and drive to oil well and by extraction because there is not crude oil to pass through sieve.
4. fractured horizontal well as claimed in claim 3 seam is filled to inspire confidence in and is contained sand and set up and pass through the block water oil production method of sieve of oil, it is characterized in that oil-producing region extraction liquid is moisture rise to a certain degree after, change to annotate and adopt direction; Again with former producing well change water injection well into, water injection well changes producing well into, under the water injection pressure effect, the most of remaining oil of former oil-producing region sees through sieve and accumulates in opposite side; Wait not have crude oil through sieve, 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, and the remaining oil that accumulates in the sieve side sees through pressure-break under pressure and gets into horizontal well, with oily extraction.
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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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 true CN102364041A (en) | 2012-02-29 |
| CN102364041B CN102364041B (en) | 2014-03-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103045374A (en) * | 2012-12-17 | 2013-04-17 | 张家港市鸿钻贸易有限公司 | Method for refining biodiesel |
| WO2013060270A1 (en) * | 2011-10-26 | 2013-05-02 | Wang Shengcun | Oil extraction method of establishing oil-permeable water-resistant sieve by filling fusheng sand into fracture of horizontal well |
| CN103628848A (en) * | 2013-12-02 | 2014-03-12 | 中国地质大学（武汉） | Multidirectional interlayer water flooding displacement oil extraction 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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| US4418755A (en) * | 1979-02-14 | 1983-12-06 | Conoco Inc. | Methods of inhibiting the flow of water in subterranean formations |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013060270A1 (en) * | 2011-10-26 | 2013-05-02 | Wang Shengcun | Oil extraction method of establishing oil-permeable water-resistant sieve by filling fusheng sand into fracture of horizontal well |
| CN103045374A (en) * | 2012-12-17 | 2013-04-17 | 张家港市鸿钻贸易有限公司 | Method for refining biodiesel |
| CN103628848A (en) * | 2013-12-02 | 2014-03-12 | 中国地质大学（武汉） | Multidirectional interlayer water flooding displacement oil extraction method and system |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013060270A1 (en) | 2013-05-02 |
| CN102364041B (en) | 2014-03-26 |
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