CN205445566U - Straight flat combination gas injection injection pattern structure - Google Patents
Straight flat combination gas injection injection pattern structure Download PDFInfo
- Publication number
- CN205445566U CN205445566U CN201521130384.5U CN201521130384U CN205445566U CN 205445566 U CN205445566 U CN 205445566U CN 201521130384 U CN201521130384 U CN 201521130384U CN 205445566 U CN205445566 U CN 205445566U
- Authority
- CN
- China
- Prior art keywords
- gas injection
- straight
- well
- oil recovery
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The utility model provides a straight flat combination gas injection injection pattern structure, include and follow water injection straight well, oil recovery straight well, oil recovery horizontal well and the gas injection straight well that the left hand right side set gradually along the horizontal direction. The utility model discloses on the basis of former water injection exploitation, adopt gas injection and water injection to combine together to compensate the not enough of waterflood development, increase oily precipitation, improve the ultimate recovery of oil reservoir.
Description
Technical field
This utility model relates to a kind of well pattern structure that fractured reservoir recovers the oil, particularly one of being applicable to and directly equals combination gas injection injection pattern structure.
Background technology
Fractured reservoir is also called Double Porosity Reservoir, refers to that the existing hole of reservoir development has again crack, reservoir space, Seepage mode to be different from conventional oil reservoir.Pore media is main oil gas reservoir place, Fracture System is the main seepage channel of oil-gas migration, owing to crack and substrate exist larger difference preserving on percolation ability, add development degree of micro cracks in oil and distribution spatially exists serious anisotropism, compared with conventional oil reservoir, fractured reservoir exploitation has certain difficulty.
Crack is more grown, the preferably block fractured reservoir of vertical communication, use traditional blowdown, after stratum energy deficit, oil well output can successively decrease rapidly, and remaining substantial oil in the matrix system that permeability is poor, elastic recovery ratio is the lowest.Waterflooding extraction supplements stratum energy, but subterranean fracture attitude Characteristics, arrangement for closed configuration and development degree lack quantitatively characterizing, inject water easily along crack water breakthrough, the easy water logging of oil well, entering high water-cut stage after oil well water breakthrough in short time, though using polynary waterflood project to see certain effect, but aqueous rising is the most very fast, voltage stabilizing control water is particularly thorny, and waterflood recovery efficiency factor is the highest.If reservoir is the wet or neutral wetting of oil, water drive will walk around substrate sillar and the only crude oil in extraction crack, and waterflood recovery efficiency factor is lower.After usual exhaustion formula and waterflooding extraction, crude oil ultimate recovery, not over 30%, still has most of surplus oil in reservoir.
Utility model content
For the problem that the recovery ratio of fractured reservoir crude oil in prior art is relatively low, the utility model proposes a kind of straight flat combination gas injection injection pattern structure, it can be avoided that inject the problem of the low crude oil residual brought of water use efficiency, oil increasing precipitation in oil recovery process, improve the ultimate recovery of oil reservoir.
This utility model solves its technical problem and be the technical scheme is that a kind of straight flat combination gas injection injection pattern structure, including the water filling straight well set gradually the most from left to right, oil recovery straight well, oil recovery horizontal well and gas injection straight well.
The gas injection section of gas injection straight well is positioned at the top of oil reservoir；The water filling section of water filling straight well is positioned at the lower section of described oil reservoir；The oil recovery section of oil recovery straight well is positioned at described oil reservoir；The horizontal segment of oil recovery horizontal well is positioned at described oil reservoir.
The gas injection section of gas injection straight well is upper gas injection perforated interval；The water filling section of water filling straight well is bet water perforated interval；The oil recovery Duan Weizhong oil recovery perforated interval of oil recovery straight well；The horizontal segment of oil recovery horizontal well contains horizontal production perforated interval.
Upper gas injection perforated interval penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd, bet water perforated interval penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd, middle oil recovery perforated interval penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd.
In water filling straight well, oil recovery straight well, the horizontal segment of oil recovery horizontal well and gas injection straight well are generally aligned in the same plane.
Distance between water filling straight well and oil recovery straight well is 200m to 300m.
Distance between water filling straight well and oil recovery straight well is 250m.
Distance between oil recovery straight well and the vertical section of oil recovery horizontal well is 150m to 300m.
Distance between right-hand member and the gas injection straight well of the horizontal segment of oil recovery horizontal well is 200m to 300m.
Distance between right-hand member and the gas injection straight well of the horizontal segment of oil recovery horizontal well is 250m.
The beneficial effects of the utility model are: on the basis of former water flooding recovery, use gas injection to combine with water filling, thus make up the deficiency of waterflooding extraction, and oil increasing precipitation improves the ultimate recovery of oil reservoir.
Accompanying drawing explanation
Fig. 1 is straight flat combination gas injection injection pattern structure layout schematic diagram in oil reservoir of the present utility model；
Fig. 2 is the structural representation of the preferred embodiment of straight flat combination gas injection injection pattern structure of the present utility model；
Fig. 3 is the recovery percent of reserves comparison diagram of straight flat combination gas injection injection pattern structure of the present utility model and the straight flat combination injection pattern structure of prior art.
Description of reference numerals:
1, gas injection straight well；11, upper gas injection perforated interval；2, water filling straight well；21, bet water perforated interval；31, oil recovery straight well；311, middle oil recovery perforated interval；32, oil recovery horizontal well；321, horizontal production perforated interval.
Detailed description of the invention
In order to be more clearly understood from technical characteristic of the present utility model, purpose and effect, now comparison accompanying drawing illustrates detailed description of the invention of the present utility model.
As it is shown in figure 1, the utility model proposes a kind of straight flat combination gas injection injection pattern structure, including the water filling straight well 2 set gradually the most from left to right, oil recovery straight well 31, oil recovery horizontal well 32 and gas injection straight well 1.
Traditional mining type is to use water flooding recovery, owing to injecting water easy crack water breakthrough, water logging oil well, makes injection water use efficiency low, and in main body section substrate, remaining oil is still difficult to employ.The blowdown of the most traditional mining type, can remaining substantial amounts of crude oil in the substrate sillar of poor permeability.Particularly with thick massive fractured reservoir, waterflooding extraction not only faces the problem of High water cut, and intake profile difference degree is relatively big, and in longitudinal direction, water-flooding performance is also serious uneven.
Straight flat combination gas injection injection pattern structure of the present utility model is applicable to bulk or thick-layer shape Fractured ligh-oil reservoir, can effectively solve the technical bottleneck that conventional development scheme is faced.Described straight flat combination gas injection injection pattern structure, on the basis of former water flooding recovery, gas injection is used to combine with water filling, there are differences with water drive owing to injecting gas dust trajectory, by intermolecular diffusion can enter ripples and less than microcrack, micropore, employ the remaining oil that water drive does not feeds through to, thus make up the deficiency of waterflooding extraction.And, between oil gas, interfacial tension is much smaller than the interfacial tension between profit, and hydrocarbon density difference is again more than profit density contrast, thus can also reduce the effect of capillary force after gas injection, it is possible to suppressing the flowing of water to a certain extent, oil increasing precipitation effect is obvious；Laboratory test research also indicates that, fractured reservoir differs greatly with matrix permeability because of crack, and waterflooding extraction substrate recovery percent of reserves is only 14.8%, and oil displacement efficiency only has 24.68%.Using gas injection development to be greatly improved substrate crude oil recovery percent of reserves, improve 43.64% relative to water drive, oil displacement efficiency is up to 63.43%.The gas injected in this utility model selects the nitrogen in noble gas as injected media, carries out injection gas displacement control water.Inject and maintain it addition, gas injection water filling synchronizes solid or improve reservoir pressure, efficient solution can determine after Fractured reservoir waterflooding High water cut the contradiction between voltage stabilizing control water, improve the ultimate recovery of oil reservoir.
In one preferred embodiment, the gas injection section of gas injection straight well 1 is positioned at the top of oil reservoir；The water filling section of water filling straight well 2 is positioned at the lower section of described oil reservoir；The oil recovery section of oil recovery straight well 31 is positioned at described oil reservoir；The horizontal segment of oil recovery horizontal well 32 is positioned at described oil reservoir.Gas injection straight well 1, water filling straight well 2, oil recovery straight well 31 and oil recovery horizontal well 32 in straight flat combination gas injection injection pattern structure of the present utility model are positioned at same injection-production well group, gas injection straight well 1 is from high-order bit injection gas displacement control water, water filling straight well 2 is from low position water injection to keep pressure, " the straight flat combination " of oil recovery straight well 31 and oil recovery horizontal well 32 recovers the oil from middle part, gas injection, water filling, oil recovery are positioned at same oil-containing target zone, form the exploitation pattern that high, medium and low three-dimensional note is adopted.
In a specific embodiment, the gas injection section of gas injection straight well 1 is upper gas injection perforated interval 11；The water filling section of water filling straight well 2 is bet water perforated interval 21；The oil recovery Duan Weizhong oil recovery perforated interval 311 of oil recovery straight well 31；The horizontal segment of oil recovery horizontal well 32 contains horizontal production perforated interval 321.It can thus be appreciated that, described straight flat combination gas injection injection pattern structure is on the basis of original well pattern, original water filling straight well 2 can be utilized to carry out water filling, water logging straight well tuberculosis gas straight well 1 carries out " the straight flat combination " of gas injection, oil recovery straight well 31 and oil recovery horizontal well 32 and carries out middle part oil recovery, implements the theory of economical and efficient oil field development, it is other that Appropriate application existing resource optimizes injection-production well, construct described straight flat combination gas injection injection pattern structure, save drilling well investment, and bring economic benefit；Meanwhile, the development scheme of this " high gas injection, low water filling ", can play dispensing effect to a certain extent, be effectively improved longitudinal swept volume.
In order to expand the swept volume of injected media, upper gas injection perforated interval 11 penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd, bet water perforated interval 21 penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd, set up effective displacement pressure system, meet oil reservoir reasonable development requirement；Middle oil recovery perforated interval 311 penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd, give full play to reservoir potentiality.
In a detailed description of the invention as shown in Figure 2, in water filling straight well 2, oil recovery straight well 31, the horizontal segment of oil recovery horizontal well 32 and gas injection straight well 1 are generally aligned in the same plane.
Wherein, distance between water filling straight well 2 and oil recovery straight well 31 is 200m to 300m, distance between oil recovery straight well 31 and the vertical section of oil recovery horizontal well 32 is 150m to 300m, and the distance between right-hand member and the gas injection straight well 1 of the horizontal segment of oil recovery horizontal well 32 is 200m to 300m.In order to avoid occurring that straight well develops the problem of easy has channeling, the distance between distance and the right-hand member of the horizontal segment of oil recovery horizontal well 32 and gas injection straight well 1 between water filling straight well 2 and oil recovery straight well 31 is preferably 250m, to improve injected media utilization rate, suggestions for improvement.
As shown in Figure 3, under the simulation of oil reservoir actual parameter calculates, contrasting the development effectiveness of straight flat combination gas injection injection pattern structure of the present utility model and the straight flat combination injection pattern structure of prior art, straight flat combination gas injection injection pattern structure of the present utility model is higher by 13.0% than the final recovery percent of reserves of the straight flat combination injection pattern structure of prior art.
The foregoing is only the schematic detailed description of the invention of this utility model, be not limited to scope of the present utility model.Any those skilled in the art, the equivalent variations made on the premise of without departing from design of the present utility model and principle and amendment, the scope of this utility model protection all should be belonged to.And it should be noted that, each ingredient of the present utility model is not limited in above-mentioned overall applicability, each technical characteristic described in description of the present utility model can select an independent employing according to actual needs or select the multinomial use that combines, therefore, this utility model naturally covers other combinations relevant with this case innovative point and specifically applies.
Claims (10)
1. the most flat combination gas injection injection pattern structure, it is characterized in that, described straight flat combination gas injection injection pattern structure includes water filling straight well (2), oil recovery straight well (31), oil recovery horizontal well (32) and the gas injection straight well (1) set gradually the most from left to right.
Straight flat combination gas injection injection pattern structure the most according to claim 1, it is characterised in that the gas injection section of gas injection straight well (1) is positioned at the top of oil reservoir；The water filling section of water filling straight well (2) is positioned at the lower section of described oil reservoir；The oil recovery section of oil recovery straight well (31) is positioned at described oil reservoir；The horizontal segment of oil recovery horizontal well (32) is positioned at described oil reservoir.
Straight flat combination gas injection injection pattern structure the most according to claim 1, it is characterised in that the gas injection section of gas injection straight well (1) is upper gas injection perforated interval (11)；The water filling section of water filling straight well (2) is bet water perforated interval (21)；Oil recovery Duan Weizhong oil recovery perforated interval (311) of oil recovery straight well (31)；The horizontal segment of oil recovery horizontal well (32) contains horizontal production perforated interval (321).
Straight flat combination gas injection injection pattern structure the most according to claim 3, it is characterized in that, upper gas injection perforated interval (11) penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd, bet water perforated interval (21) penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd, middle oil recovery perforated interval (311) penetrate out thickness less than or equal to described oil reservoir thickness 1/3rd.
Straight flat combination gas injection injection pattern structure the most according to claim 1, it is characterized in that, in water filling straight well (2), oil recovery straight well (31), the horizontal segment of oil recovery horizontal well (32) and gas injection straight well (1) are generally aligned in the same plane.
Straight flat combination gas injection injection pattern structure the most according to claim 1, it is characterised in that the distance between water filling straight well (2) and oil recovery straight well (31) is 200m to 300m.
Straight flat combination gas injection injection pattern structure the most according to claim 6, it is characterised in that the distance between water filling straight well (2) and oil recovery straight well (31) is 250m.
Straight flat combination gas injection injection pattern structure the most according to claim 1, it is characterised in that the distance between the vertical section of oil recovery straight well (31) and oil recovery horizontal well (32) is 150m to 300m.
Straight flat combination gas injection injection pattern structure the most according to claim 1, it is characterised in that the distance between right-hand member and the gas injection straight well (1) of the horizontal segment of oil recovery horizontal well (32) is 200m to 300m.
Straight flat combination gas injection injection pattern structure the most according to claim 9, it is characterised in that the distance between right-hand member and the gas injection straight well (1) of the horizontal segment of oil recovery horizontal well (32) is 250m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521130384.5U CN205445566U (en) | 2015-12-31 | 2015-12-31 | Straight flat combination gas injection injection pattern structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521130384.5U CN205445566U (en) | 2015-12-31 | 2015-12-31 | Straight flat combination gas injection injection pattern structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205445566U true CN205445566U (en) | 2016-08-10 |
Family
ID=56598906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521130384.5U Active CN205445566U (en) | 2015-12-31 | 2015-12-31 | Straight flat combination gas injection injection pattern structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205445566U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236898A (en) * | 2018-11-28 | 2020-06-05 | 中国石油化工股份有限公司 | Method for improving recovery ratio based on stagnant gas |
-
2015
- 2015-12-31 CN CN201521130384.5U patent/CN205445566U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236898A (en) * | 2018-11-28 | 2020-06-05 | 中国石油化工股份有限公司 | Method for improving recovery ratio based on stagnant gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102913221B (en) | Volume transformation process of low permeability reservoir | |
| CN104989341B (en) | A kind of method for determining low-permeability oil deposit effective displacement injector producer distance | |
| CN100999992B (en) | Method for transferring steam driven at thickened oil steam taking-in and sending-out later period post | |
| CN101280678A (en) | Oil well chemical gorge and disgorge yield increasing and inverse direction regulating block connection working process | |
| CN104594859B (en) | A kind of method of the fine and close oily oil reservoir of nano-fluid exploitation | |
| CN108708693A (en) | A kind of closing fault block oil reservoir nitrogen compound throughput method | |
| CN104314539A (en) | Artificial foaming-oil huff and puff oil production method for heavy oil reservoir | |
| CN105239990A (en) | Placing method of self-simulating lateral-displacement horizontal well of super-low permeability tight reservoir | |
| CN101952544A (en) | Method of hydraulic fracturing of horizontal wells, resulting in increased production | |
| CN106437674A (en) | Imitation horizontal well waterflooding well pattern adapting method | |
| CN109209333A (en) | The more gang of wells high-efficiency mining spacing optimization methods of shale gas | |
| CN104632157A (en) | Low permeability reservoir equilibrium displacement method | |
| CN105422068A (en) | Method for developing heavy oil reservoir of horizontal well by combining staged volume fracturing and fracturing filling | |
| CN103174403A (en) | Gravity and steam flooding combined mining method of thick layer containing interlayer common heavy oil reservoir | |
| CN106437642A (en) | Fractured reservoir horizontal well injection-production asynchronous exploitation method | |
| CN104033137B (en) | Oilfield sewage is utilized to improve fault block oil reservoir recovery ratio method | |
| CN207093050U (en) | A kind of gas drive well pattern structure of high water cut rate high inclination-angle LOW PERMEABILITY RESERVOIR | |
| CN105089594A (en) | Water-control effect-enhancing fracturing method of carbonate reservoir | |
| CN108457630A (en) | The method for improving oil recovery using polygamy point small pressure difference water filling | |
| CN204252974U (en) | A kind of horizontal well well structure for the block fractured reservoir exploitation of deep layer | |
| CN205445566U (en) | Straight flat combination gas injection injection pattern structure | |
| CN107448179A (en) | A kind of CO2- water alternately injects the method and its application of purging | |
| CN105089573A (en) | Recovering method for improving substrate and microfracture oil flooding efficiency in dual medium reservoir gas injection | |
| CN110318719A (en) | A kind of two-way displacement method of positive rhythm thick formation | |
| CN208057104U (en) | The well pattern structure of deep layer bulk fractured reservoir is developed for gas drive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |