CN108979610A - Horizontal well seam liquid flow steering water control and water plugging development method, device and system - Google Patents
Horizontal well seam liquid flow steering water control and water plugging development method, device and system Download PDFInfo
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- CN108979610A CN108979610A CN201810888601.9A CN201810888601A CN108979610A CN 108979610 A CN108979610 A CN 108979610A CN 201810888601 A CN201810888601 A CN 201810888601A CN 108979610 A CN108979610 A CN 108979610A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 353
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000011161 development Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 title abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 73
- 239000007924 injection Substances 0.000 claims abstract description 73
- 239000003921 oil Substances 0.000 claims abstract description 62
- 230000000903 blocking effect Effects 0.000 claims abstract description 45
- 239000011159 matrix material Substances 0.000 claims abstract description 24
- 239000011148 porous material Substances 0.000 claims abstract description 23
- 239000010779 crude oil Substances 0.000 claims abstract description 22
- 238000006073 displacement reaction Methods 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 27
- 238000013459 approach Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 10
- 230000035699 permeability Effects 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003129 oil well Substances 0.000 description 9
- 238000011084 recovery Methods 0.000 description 6
- 235000020681 well water Nutrition 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 239000002349 well water Substances 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 230000035755 proliferation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
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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)
- Earth Drilling (AREA)
Abstract
The invention provides a development method, a device and a system for steering, controlling and blocking water of liquid flow in horizontal well seams, wherein the method comprises the following steps: blocking the water outlet crack to isolate the water outlet crack from being communicated with the horizontal shaft, wherein the water outlet crack is communicated with the water injection well; performing a fracturing process on the oil reservoir on at least one side of the water outlet fracture, thereby forming a newly created fracture on at least one side of the water outlet fracture, wherein the newly created fracture is communicated with the horizontal shaft; water is injected into the water outlet fractures through the water injection well, and the injected water flows through the matrix pores of the oil reservoir to the newly created fractures, thereby displacing the crude oil in the matrix pores to flow into the newly created fractures and ultimately into the horizontal wellbore. The invention can better improve the water control and water plugging effect of the fractured water breakthrough of the horizontal well and improve the utilization degree of the water drive reserve of the fractured water breakthrough horizontal well.
Description
Technical field
The present invention relates to control water blocking water technical fields more particularly to a kind of horizontal well to stitch interior fluid diversion control water blocking water exploitation
Method, apparatus and system.
Background technique
The description of this part, which is only provided, discloses relevant background information to the present invention, without constituting the prior art.
" staged fracturing+water filling supplements energy " is a kind of technical tactic of hyposmosis and fine and close oily reservoir horizontal well exploitation.
Since reservoir permeability is small compared to crack, in development process, it is commonly present after being linked up due to injection water with crack along crack
The problem of flowing directly into pit shaft, and leading to invalid displacement.In this way, water drive control and waterflood efficiency are greatly lowered, oil well table
It is now quick water logging to lose production capacity.Above-mentioned is the Fractured water breakthrough of oil well, need to implement to control water blocking water to restore production capacity.
Horizontal well control water blocking water phase is more difficult compared with straight well, and it is horizontal that technology is concentrated mainly on the non-pressure break of medium to high permeable oil reservoir
Well and bottom water reservoir (coning) coning block aspect, and the main technique taken includes chemical water plugging method, water pack off method and beats double
Horizontal wellbore method etc..And how production capacity is restored for the horizontal well of waterflooding extraction, fracturing reform Fractured water breakthrough, it still uses at present
Above-mentioned several ways can not but obtain good effect.
It should be noted that the above description of the technical background be intended merely to it is convenient to technical solution of the present invention carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes of the invention
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
" staged fracturing+water filling supplement energy " development scheme of the prior art, easily lead to oil well occur Fractured water breakthrough this
The reason of one problem is that the permeability of oil reservoir is lower, and being injected into crack through water injection well, (what usually artificial fracturing was formed manually splits
Seam) in water, can the selectively lesser direction flowing of higher, flow resistance to permeability.Since man-made fracture is usually in water
Horizontal well cylinder is implemented perforation+hydraulic fracturing mode and is formed, then man-made fracture is directly connected to horizontal wellbore.To inject water warp
Man-made fracture flows directly into horizontal wellbore.
That is, generate Fractured water breakthrough essence the reason is that, injection water cannot enter laterally oil reservoir, can not be to oil reservoir
In crude oil carry out displacement.And inject water and can not achieve displacement to crude oil, crude oil development is not known where to begin then.
And chemical water plugging method that the prior art uses, water pack off method and beat the known embodiments such as dual horizontal well cylinder method,
Can achieve the purpose that control water blocking water, and can not solve so that inject water in oil reservoir lateral flow with displacement crude oil recovery production capacity this
One final problem.
Based on prior art defect above-mentioned, the embodiment of the invention provides a kind of horizontal wells to stitch interior fluid diversion control water blocking
Water development approach, apparatus and system can preferably improve the control water water plugging effect of horizontal well Fractured water breakthrough, improve Fractured
The development degree of water breakthrough horizontal well water drive reserves.
The inventive concept that the present invention solves the above problems is, water outlet crack is blocked, and the water outlet crack at least
Again pressure break goes out new crack for side, makes crack as new.So, the water injected by water injection well into water outlet crack, can only
Oil reservoir is entered laterally, so that the crude oil in displacement oil reservoir, which enters, newly makes crack, and eventually enters into horizontal wellbore, realizes and recovers the oil.
To achieve the goals above, the present invention provides the following technical solutions.
A kind of interior fluid diversion control water blocking water development approach of horizontal well seam, comprising: water outlet crack is blocked, to completely cut off itself and water
The connection of horizontal well cylinder, the water outlet crack are connected to water injection well；Pressure break work is executed to the oil reservoir of the water outlet crack at least side
Skill newly makes crack to be formed in at least side in the water outlet crack, described newly to make crack and be connected to the horizontal wellbore；
It is filled the water by the water injection well into the water outlet crack, the water of injection is split by the matrix pores of the oil reservoir to described newly make
Seam flows, so that the crude oil inflow in matrix pores described in displacement is described newly to make crack, and finally flows into the horizontal wellbore.
A kind of horizontal well stitch in fluid diversion control water blocking water and extracting device of oil, comprising: plugging module, for blocking out water crack
Seam, to completely cut off its connection with horizontal wellbore, the water outlet crack is connected to water injection well；Pressure break module, for the water outlet
The oil reservoir of crack at least side executes fracturing technology, newly makes crack to be formed in at least side in the water outlet crack, institute
It states and newly makes crack and be connected to the horizontal wellbore；Water injection module, for being filled the water by the water injection well into the water outlet crack,
The water of injection newly makes flow in fracture to described by the matrix pores of the oil reservoir, thus the crude oil in matrix pores described in displacement
Flow into it is described newly make crack, and finally flow into the horizontal wellbore.
A kind of horizontal well stitch in fluid diversion control water blocking water and oil extraction system, the horizontal well, which has, to be extended in oil reservoir
Horizontal wellbore is formed with water outlet crack in the oil reservoir, and, crack is newly made positioned at the water outlet crack at least side；Its
In, the water outlet crack is blocked, so that it is isolated with the horizontal wellbore, and the water outlet crack is connected to water injection well,
It is described newly to make crack and be connected with the horizontal wellbore；When being filled the water by the water injection well into the water outlet crack, injection
Water energy newly make flow in fracture to described by the matrix pores of the oil reservoir, thus the crude stream in matrix pores described in displacement
Enter it is described newly make crack, and finally flow into the horizontal wellbore.
The present invention forms in the two sides in water outlet crack again pressure break by blocking water outlet crack and newly makes crack.Then pass through
The water that water injection well is injected into water outlet crack is forced towards at least side due to being isolated between water outlet crack and horizontal wellbore
Newly make flow in fracture, so that crude oil in displacement matrix pores, which is newly made crack, flows into horizontal wellbore, to establish new
Displacement system prevents the inefficient cycle of water injection well injection water, not only improves the control water water plugging effect of horizontal well Fractured water breakthrough,
It is also able to achieve water outlet crack two sides reserves effectively to employ, restores oil well productivity.
Therefore, the present invention prevents injection water from entering horizontal wellbore along water outlet crack, out by blocking to water outlet crack
Water crack is stitched to few side, and pressure break forms and newly makes crack again, be discharged injection water in crack from along water outlet crack to horizontal wellbore side
To flowing, it is changed into through matrix pores to newly flow in fracture is made, the crude oil inflow in displacement matrix pores newly makes crack, then
It is newly made crack and flows into horizontal wellbore, to improve Fractured water breakthrough horizontal well water drive reserves development degree.
Referring to following description and accompanying drawings, the particular embodiment of the present invention is disclosed in detail, specifies the principle of the present invention
It can be in a manner of adopted.It should be understood that the embodiment of the present invention is not so limited in range.It is wanted in appended right
In the range of the spirit and terms asked, the embodiment of the present invention includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in other embodiments, is combined with the feature in other embodiments, or the feature in substitution other embodiments.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses.In addition, shape and proportional sizes of each component in figure etc. are only schematical, it is used to help the understanding of the present invention, and
It is not the specific shape and proportional sizes for limiting each component of the present invention.Those skilled in the art under the teachings of the present invention, can
Implement the present invention to select various possible shapes and proportional sizes as the case may be.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of fluid diversion control water blocking water and oil extraction system in the horizontal well of the embodiment of the present invention stitches；
Fig. 2 is the flow chart of fluid diversion control water blocking water development approach in the horizontal well of the embodiment of the present invention stitches；
Fig. 3 is the module map of fluid diversion control water blocking water and extracting device of oil in the horizontal well of the embodiment of the present invention stitches；
Fig. 4 is that a kind of double-deck concentric oil tubes note of known embodiments of the prior art adopts schematic illustration.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work, all should belong to guarantor of the present invention
The range of shield.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.
Pressure break in oil reservoir 300 of the embodiment of the present invention forms at least two adjacent cracks, including water outlet crack 100, position
It is that crack 400 was made in the new of pressure break formation again later in water outlet crack 100 at least side.It is discharged crack 100 and water injection well 600
Connection, it is subsequent, it will be as water filling crack.Since water outlet crack 100 is blocked, then injection water will be unable to pass through again it directly
Into horizontal wellbore 200, and 400 lateral flow of crack can only be made towards new.
In fact, there are three cracks of setting in the prior art, by injecting water splitting to two sides to intermediate crack water injection
Seam flowing, to solve the problems, such as this known embodiments of displacement crude oil.Specifically, notification number provides for CN105114048B
" a kind of horizontal well fracturing single-well injection-production oil production method ".
As shown in figure 4, the known embodiments include three cracks, it is respectively located in the middle target injection crack 10, position
In the extraction crack 9 and extraction crack 11 of target injection 10 two sides of crack.The double-deck concentric oil tubes installed in casing 2 include outer tube
3 and the inner tube 4 that is set in outer tube 3, packer 15 and 16 is connected outside casing 2, and target is injected into crack 10 and extraction crack 9
It is separated with extraction crack 11.The injection liquid channel being connected to target injection crack 10, outer tube 3 are formed between inner tube 4 and outer tube 3
The Produced Liquid channel I being connected to extraction crack 11 is formed between casing 2, inner tube 4 forms the Produced Liquid being connected to extraction crack 9
Channel II.
Crack 10, which is injected, to target by injection liquid channel injects displacement of reservoir oil agent, the subsequent lateral flow of displacement of reservoir oil agent, displacement
Crude oil flows into Produced Liquid channel I and II by producing crack 9 and 11, realizes and recovers the oil.
However, the known embodiments need that the double-deck concentric oil tubes are arranged in the wellbore, and need using packer fracture
Carry out interval separation, it is also necessary to establish the connected relation between three cracks and three channels.Therefore, the known embodiments structure
And process implementing is complex, in some instances it may even be possible to exist since the connected relation between three cracks and three channels is corresponding inaccurate and
Lead to the problem of implementing failure.
In view of this, stitching interior fluid diversion control water blocking water development approach, device the present invention provides a kind of horizontal well and being
System.As shown in Figure 1, horizontal well has the horizontal wellbore 200 extended in oil reservoir 300, water outlet crack is formed in oil reservoir 300
100, and, crack 400 is newly made positioned at water outlet crack 100 at least side.Wherein, water outlet crack 100 blocked, thus its with
Horizontal wellbore 200 is isolated, and is discharged crack 100 and is connected to water injection well 600, is newly made crack 400 and is connected with horizontal wellbore 200
It is logical.
When being filled the water by water injection well 600 to water outlet crack 100, the water energy of injection by the matrix pores of oil reservoir 300 to
The flowing of crack 400 is newly made, so that the crude oil inflow in displacement matrix pores newly makes crack 400, and finally flows into horizontal wellbore
200。
In the present embodiment, at least side for being discharged crack 100, which is formed with, newly makes crack 400.The water of injection is due to water outlet
Crack 100, which is blocked, flows horizontal proliferation, and this lateral flow is likely to occur in the two sides in water outlet crack 100.Cause
This, preferably, the two sides in water outlet crack 100 are each formed with and newly make crack 400, the raising injection that maximum can be limited in this way
The utilization rate of water, and then displacement efficiency is improved, avoid the occurrence of displacement dead angle.
In addition, injection water, after one is newly made crack 400, pressure decline continues the insufficient pressure of horizontal proliferation flowing.Cause
This, preferably respectively forms one in the two sides in water outlet crack 100 and newly makes crack 400.Newly making crack 400 is two, and two are newly made
Crack 400 is located at the two sides in water outlet crack 100.In this way, under the premise of guaranteeing Flooding Efficiency, take into account pressure break seam at
This.
Water outlet crack 100 and the trend for newly making crack 400, are not limited to vertical with horizontal wellbore 200.In fact, only
It is discharged crack 100 to be blocked, has completely cut off the connected relation with horizontal wellbore 200, and newly make crack 400 and horizontal wellbore 200
It is connection.
Further, water outlet crack 100 can be blocked using any appropriate prior art or construction.Preferably,
Closure can be realized to be squeezed into the mode of cement slug 500 in the sealing that is connected with horizontal wellbore 200, not only implement in this way
Simply, the water filling length of water crack seam 100 can also be extended as far as possible, to increase the drive that injection water is in contact with oil reservoir 300
For area, displacement efficiency is improved.
As shown in Fig. 2, to form the method flow diagram that horizontal well stitches interior fluid diversion control water blocking water and oil extraction system.Although
The present invention provides the method operating procedures as described in following embodiments or flow chart, but based on routine or without creating
The labour of property, may include more or less operating procedure in the method.In addition, the method in logicality not
In the step of there are necessary causalities, the execution sequence of these steps is not limited to execution provided in embodiment of the present invention
Sequentially.
Referring to figs. 1 and 2, the embodiment of the invention provides a kind of horizontal wells to stitch interior fluid diversion control water blocking water exploitation
Method may include steps of:
Step S40: blocking water outlet crack 100, to completely cut off the connection of itself and horizontal wellbore 200, water outlet crack 100 and water filling
Well 600 is connected to；
Step S50: fracturing technology is executed to the oil reservoir 300 of water outlet crack 100 at least side, thus in water outlet crack 100
At least side be formed with and newly make crack 400, newly make crack 400 and be connected to horizontal wellbore 200；
Step S60: being filled the water by water injection well 600 into the water outlet crack 100, and the water of injection passes through the base of oil reservoir 300
Matter hole so that the crude oil inflow in displacement matrix pores newly makes crack 400, and finally flows into water to the flowing of crack 400 is newly made
Horizontal well cylinder 200.
The horizontal well of the embodiment of the present invention stitches interior fluid diversion control water blocking water development approach, suitable for being caused due to injection water
200 water breakthrough of horizontal wellbore or the situation of water logging.Wherein, injection water is injected by water injection well 600, into the man-made fracture of preparatory pressure break
In.In general, in advance pressure break man-made fracture be it is a plurality of, be connected to horizontal wellbore 200, water outlet crack 100 be it is a plurality of manually
One in crack.
Same above description, newly make crack 400 quantity be at least one, preferably two, and be located at water outlet crack
100 two sides.Specific embodiment is to execute fracturing technology to the oil reservoir 300 of water outlet 100 two sides of crack, thus in water outlet crack
100 two sides are each formed with and newly make crack 400, and the quantity for newly making crack 400 for being located at water outlet 100 side of crack is one.
Before implementing the step of water outlet crack 100 blocks, the embodiment of the invention also includes the judgement of Fractured water breakthrough steps
Suddenly, i.e., 200 water breakthrough of determined level pit shaft or water logging whether by Fractured water breakthrough caused by.
Specifically, as shown in Fig. 2, block be discharged crack 100 the step of before, the method also includes:
Step S10: whether 200 water breakthrough type of determined level pit shaft is Fractured water breakthrough；
Step S20: if so, determining the water exit position of horizontal wellbore 200, the corresponding crack of water exit position is to be discharged crack
100；
Step S30: whether the water source for identifying water crack seam 100 is water injection well 600；Water crack is blocked out if so, executing
The operation of seam 100.
In the present embodiment, whether 200 water breakthrough type of horizontal wellbore is that Fractured water breakthrough can be by oil well production dynamic
Feature judges；Water exit position can be determined by the methods of mechanical groundwater-tracing method, engineering log method or production logging；And come water source
Whether head is that water injection well 600 can then be identified using the methods of interference test, tracer monitoring or waterflood front test.It is above-mentioned equal
It can be realized by the prior art, therefore not to repeat here.
In addition, after step S10, can be with the aqueous rising of analysis level pit shaft 200 and water logging the reason of, pass through water type point
Analysis is determined as injecting water and advancing by leaps and bounds that waterflood is caused to lose production capacity.In this way, determining that oil well since water logging loses production capacity, is further tested
Demonstrate,proving oil well water breakthrough is Fractured water breakthrough caused by being filled the water by water injection well 600.
It continues from the preceding paragraph description, water outlet crack 100 is formed in a plurality of man-made fracture when being " staged fracturing+water filling supplements energy "
One of.When determine 200 water breakthrough of horizontal wellbore or water logging be by Fractured water breakthrough caused by when, need manually to split from a plurality of
That crack of water outlet is found in seam, as water outlet crack 100.It is then determined that after water source is water injection well 600, it can be right
It is discharged crack 100 and implements plugging operations.
And once it is above-mentioned two judge in have one be it is no, then illustrate that oil well water breakthrough is not from splitting in water injection well 600
Seam property water breakthrough.At this point, technical solution of the present invention need not be implemented, need to further determine that water outlet reason, and takes corresponding
Remedial measure.
The concrete mode for blocking water outlet crack 100 is to inject cement into the water outlet crack 100 of near wellbore zone and form slug
500, the length is 2 to 3 meters, and block the sealing that water outlet crack 100 is connected to horizontal wellbore 200, and then realize water outlet crack 100
The isolation of connected relation between horizontal wellbore 200.
In addition, that newly makes newly makes the position in crack 400, it should be effective displacement and efficient displacement can be established as principle.Tool
Body determines that principle is, according to the permeability of oil reservoir 300 and is discharged pressure in the seam in crack 100, determines the position for newly making crack；
Pressure break seam is carried out at the determining position for newly making crack, is formed and newly makes crack 400.
Specifically, the permeability of oil reservoir 300 is better, pressure is higher in the seam in water outlet crack 100, newly makes the position in crack i.e.
It is bigger at a distance from water outlet crack 100 newly to make crack 400.
After completing aforesaid operations, i.e., implementable oil-recovery operations.Specifically, the tripping in flow string into horizontal well, horizontal well
The crude oil of cylinder 200 is lifted to ground through flow string.Specific artificial lifting way can use any appropriate prior art, this hair
It is bright that this is not construed as limiting.
Based on same design, the embodiment of the invention also provides a kind of horizontal wells to stitch interior fluid diversion control water blocking water and oil recovery
Device, as described in following embodiment.Since horizontal well stitches the principle of interior fluid diversion control water blocking water and extracting device of oil, and
The technical effect that can be obtained is similar to fluid diversion control water blocking water development approach in horizontal well seam, therefore horizontal well stitches interior liquid stream
The implementation for turning to control water blocking water and extracting device of oil may refer to fluid diversion control water blocking water development approach in above-mentioned horizontal well seam
Implement, overlaps will not be repeated.Term " module " used below, can be based on software realization, is also possible to be based on
Hardware realization can also be and be realized in a manner of software and hardware combining.
As shown in figure 3, the horizontal well of the embodiment of the present invention stitches interior fluid diversion control water blocking water and extracting device of oil may include:
Plugging module 40, pressure break module 50 and water injection module 60.Wherein,
Plugging module 40, to completely cut off the connection of itself and horizontal wellbore 200, is discharged crack 100 for blocking water outlet crack 100
It is connected to water injection well 600；
Pressure break module 50 is used to execute fracturing technology to the oil reservoir 300 of water outlet crack 100 at least side, thus in water crack out
What at least side formation of seam 100 was connected to horizontal wellbore 200 newly makes crack 400；
Water injection module 60 is used to fill the water by water injection well 600 into water outlet crack 100, and the water of injection passes through oil reservoir 300
Matrix pores so that the crude oil inflow in displacement matrix pores newly makes crack 400, and are finally flowed into the flowing of crack 400 is newly made
Horizontal wellbore 200.
Further, the horizontal well of the embodiment of the present invention stitches interior fluid diversion control water blocking water and extracting device of oil can also include
Caused by whether the judgment module of Fractured water breakthrough, i.e. 200 water breakthrough of determined level pit shaft or water logging are by Fractured water breakthrough.
Specifically, comprising:
Whether judgment module 10 is Fractured water breakthrough for 200 water breakthrough type of determined level pit shaft；
Determining module 20, for determining the water exit position of horizontal wellbore 200, the corresponding crack of water exit position is water crack
Seam 100；
Identification module 30, whether the water source for being discharged crack 100 for identification is water injection well 600.
The horizontal well of the embodiment of the present invention stitches interior fluid diversion control water blocking water development approach, apparatus and system, passes through closure
It is discharged crack 100, and is formed in the two sides in water outlet crack 100 again pressure break and newly makes crack 400.Then by water injection well 600 to out
The water that injects is forced towards at least side due to being isolated between water outlet crack 100 and horizontal wellbore 200 in water crack seam 100
The flowing of crack 400 is newly made, so that the crude oil in displacement matrix pores, which is newly made crack 400, flows into horizontal wellbore 200, to establish
New displacement system prevents the inefficient cycle that water injection well 600 injects water, not only improves the control water of horizontal well Fractured water breakthrough
Water plugging effect, moreover it is possible to realize that water outlet 100 two sides reserves of crack are effectively employed, restore oil well productivity.
Therefore, the present invention prevents injection water from entering along water outlet crack 100 horizontal by blocking to water outlet crack 100
Pit shaft 200, pressure break forms and newly makes crack 400 again for water outlet crack 100 at least side, is discharged the injection water in crack 100 by edge
It is discharged crack 100 to flow to 200 direction of horizontal wellbore, is changed into and is flowed by matrix pores to new crack 400 of making, displacement matrix
Crude oil inflow in hole newly makes crack 400, is then newly made crack 400 and flows into horizontal wellbore 200, seen to improve Fractured
Water horizontal well water drive reserves development degree.
In addition, the horizontal well of the embodiment of the present invention stitches interior fluid diversion control water blocking water development approach, apparatus and system, only need
It finds and determines that 100 positions are stitched in water crack, and at least pressure break forms and newly makes crack 400 again for side at it,
His structure still keeps its original function to continue to play, and (such as water injection well 600 still normally executes its original water flood operations, horizontal
Pit shaft 200 still normally executes its original strike the oil and oil-recovery operations), further change without making other to original structure again
It makes.For compared to known embodiments mentioned above, the horizontal well of the embodiment of the present invention stitches interior fluid diversion control water blocking
The structure of water system is simplified, and corresponding implementation method is also very simple.
The horizontal well of the embodiment of the present invention stitches interior fluid diversion control water blocking water development approach, apparatus and system is transported in practice
With achieving preferable implementation result.Specifically, embodiment well is 1 mouthful of water horizontal well, 1000 meters of horizontal well tube length, single well-controlled is stored up
Measure 300,000 tons.Fracturing reform fills the water waterflooding development using 5 methods (or 6 methods), around has 4 mouthfuls of water injection well (or 6 mouthfuls), goes into operation
Initial stage low aqueous high oil mass (10 tons or more).Produce a period of time after, it is aqueous fly up even water logging, Liquid output substantially on
It rises, hydrodynamic face is climbed to well head, and for well head pressure even close to surrounding well water injection pressure, oil mass drops to 0, adds up oil-producing
A few kiloton is measured, production capacity is lost, recovery ratio, well below 25% or more recovery ratio of development plan planning, is produced less than 1%
Amount, reserves loss are serious.
Horizontal well is carried out using the present invention and stitches interior fluid diversion control water blocking water, changes water drive direction, avoids injection water invalid
Circulation restores horizontal productivity, improves water drive reserves development degree and water drive reserves employ efficiency.
The foregoing is merely several embodiments of the present invention, and those skilled in the art is according to invention file disclosure
Various changes or modifications can be carried out without departing from the spirit and scope of the present invention to the embodiment of the present invention.
Claims (10)
1. a kind of horizontal well stitches interior fluid diversion control water blocking water development approach characterized by comprising
Water outlet crack is blocked, to completely cut off its connection with horizontal wellbore, the water outlet crack is connected to water injection well；
Fracturing technology is executed to the oil reservoir of the water outlet crack at least side, to be formed in at least side in the water outlet crack
Have and newly makes crack, it is described newly to make crack and be connected to the horizontal wellbore；
It is filled the water by the water injection well into the water outlet crack, the water of injection is by the matrix pores of the oil reservoir to described new
Flow in fracture is made, so that the crude oil inflow in matrix pores described in displacement is described newly to make crack, and finally flows into the horizontal well
Cylinder.
2. the method as described in claim 1, which is characterized in that before blocking the step of being discharged crack, the method is also wrapped
It includes:
Whether determined level pit shaft water breakthrough type is Fractured water breakthrough；
If so, determining the water exit position of the horizontal wellbore, the corresponding crack of water exit position is the water outlet crack；
Whether the water source for identifying the water outlet crack is water injection well；If so, executing the operation for blocking the water outlet crack.
3. the method as described in claim 1, which is characterized in that execute fracturing technology in the oil reservoir to water outlet crack at least side
The step of in,
Fracturing technology is executed to the oil reservoir of water outlet crack two sides, is split to be each formed with newly to make in the two sides in the water outlet crack
Seam, and the quantity for newly making crack for being located at the water outlet crack side is one.
4. the method as described in claim 1, which is characterized in that the mode for blocking water outlet crack is the water outlet near wellbore zone
Slug is injected in crack, the slug blocks the sealing that the water outlet crack is connected to the horizontal wellbore.
5. method as claimed in claim 4, which is characterized in that the slug is cement slug, and the length is 2 to 3 meters.
6. the method as described in claim 1, which is characterized in that forming the step of newly making crack includes:
According to pressure in the seam in the permeability of the oil reservoir and the water outlet crack, the position for newly making crack is determined；
Pressure break seam is carried out at the determining position for newly making crack, formation is described newly to make crack.
7. the method as described in claim 1, which is characterized in that is filled the water by the water injection well into the water outlet crack
After step, the method also includes: the crude oil of the tripping in flow string into horizontal well, the horizontal wellbore is managed through the production
Column is lifted to ground.
8. a kind of horizontal well stitches interior fluid diversion control water blocking water and extracting device of oil characterized by comprising
Plugging module, for blocking water outlet crack, to completely cut off its connection with horizontal wellbore, the water outlet crack and water injection well connect
It is logical；
Pressure break module executes fracturing technology for the oil reservoir to the water outlet crack at least side, thus in the water outlet crack
At least side be formed with and newly make crack, it is described newly to make crack and be connected to the horizontal wellbore；
Water injection module, for being filled the water by the water injection well into the water outlet crack, the water of injection passes through the base of the oil reservoir
Matter hole newly makes flow in fracture to described, so that the crude oil inflow in matrix pores described in displacement is described newly to make crack, and final
Flow into the horizontal wellbore.
9. device as claimed in claim 8, which is characterized in that further include:
Whether judgment module is Fractured water breakthrough for determined level pit shaft water breakthrough type；
Determining module, for determining the water exit position of the horizontal wellbore, the corresponding crack of water exit position is the water crack out
Seam；
Identification module, whether the water source in the water outlet crack is water injection well for identification.
10. a kind of horizontal well stitches interior fluid diversion control water blocking water and oil extraction system, the horizontal well, which has, to be extended in oil reservoir
Horizontal wellbore, which is characterized in that water outlet crack is formed in the oil reservoir, and, positioned at the water outlet crack at least side
Newly make crack；Wherein, the water outlet crack is blocked, so that it is isolated with the horizontal wellbore, and the water outlet crack with
Water injection well connection, it is described newly to make crack and be connected with the horizontal wellbore；
When being filled the water by the water injection well into the water outlet crack, the water energy of injection by the matrix pores of the oil reservoir to
It is described newly to make flow in fracture, thus crude oil in matrix pores described in displacement flow into it is described newly make crack, and described in finally flowing into
Horizontal wellbore.
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| CN201810888601.9A CN108979610A (en) | 2018-08-07 | 2018-08-07 | Horizontal well seam liquid flow steering water control and water plugging development method, device and system |
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| CN201810888601.9A CN108979610A (en) | 2018-08-07 | 2018-08-07 | Horizontal well seam liquid flow steering water control and water plugging development method, device and system |
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