CN106437642A - Fractured reservoir horizontal well injection-production asynchronous exploitation method - Google Patents
Fractured reservoir horizontal well injection-production asynchronous exploitation method Download PDFInfo
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- CN106437642A CN106437642A CN201610294730.6A CN201610294730A CN106437642A CN 106437642 A CN106437642 A CN 106437642A CN 201610294730 A CN201610294730 A CN 201610294730A CN 106437642 A CN106437642 A CN 106437642A
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Abstract
The invention provides a fractured reservoir horizontal well injection-production asynchronous exploitation method. The method comprises the steps that 1, area selecting and well selecting are conducted, specifically, a reservoir stratum with developed natural micro-fractures is selected, fractured water breakthrough in the multi-section fractured horizontal well production process is achieved through waterflooding extraction, and when the average increasing amount of the water content every day is larger than or equal to 1.5%, remaining oil within a horizontal well controlled area is used for an injection-production asynchronous oil extraction horizontal well; 2, the oil extraction horizontal well is closed, 80-100 cubic meters of water is injected into a water injection well, and the oil extraction horizontal well is closed; 3, the water injection well is closed, then, the oil extraction horizontal well is opened for oil extraction, the injected water entering matrix rock blocks is preserved, and the equal amount of crude oil replacing the injected water enters a fracture system, flows into a shaft and is extracted; and 4, the next round of water injection is started, the step 2 and the step 3 are repeated, and injection-exploitation asynchronous operation is conducted for 8-10 periods. According to the fractured reservoir horizontal well injection-exploitation asynchronous exploitation method, on the basis of the seam-net type fractures, the contact area of the injected water and the fractures is enlarged, the oil-water replacement amount is further increased, the reservoir overall imbibitions yield-increasing effect is improved, and accordingly the purposes of decreasing the water content of the fractured water breakthrough horizontal well, increasing the liquid amount and the oil amount, and supplementing the stratum energy are achieved.
Description
Technical field
The present invention relates to oil field development field, adopt asynchronous recovery method particularly to a kind of Horizontal Well in Fractured Reservoir note.
Background technology
With the gradually scarcity with high-quality petroleum resources that becomes increasingly conspicuous of world oil imbalance between supply and demand, Oil in Super-low Permeability fine and close oil money
The exploitation in source has become the agent object of China Petroleum development, and domestic and international compact oil reservoir production practices have shown that frac water
Horizontal well is a kind of effective exploitation mode developing such oil reservoir.And major part hyposmosis compact oil reservoir intrinsic fracture, microcrack are sent out
Educating, after horizontal well multistage fracturing reform, artificial fracture is complicated, is more readily formed pressure-break and water injection well during waterflooding extraction
Between intrinsic fracture link up, ultimately result in the Fractured water logging of horizontal well.Fracture development oil reservoir frac water horizontal well waterflooding extraction mistake
Cheng Zhong, Fractured water breakthrough phenomenon is commonplace, how to realize effectively employing of crude oil in Fractured water breakthrough horizontal well control area,
Remaining Oil, improving recovery ratio is Horizontal Well in Fractured Reservoir waterflooding extraction problems faced.
Concern is had to adopt asynchronous research outside Present Domestic, mainly in exploitation straight well, existing fractured reservoir pressure break
The method using after horizontal well Fractured water breakthrough and the problem of existence：
（1）After water injection well stops note, stratum energy is not enough, horizontal well Liquid output rapid decrease, it is impossible to realize the effectively dynamic of remaining oil
With.
（2）Frac water horizontal well Number of Fractures is many, and under current technical conditions, the water detection cycle is long, and is difficult to judge concrete water outlet
Point.
（3）The water plugging and profile controlling technology being applied to horizontal well at present is immature, and Residual effect of measure fruit is notable or during water blockoff
Effect property is short, aqueous meeting rapid increase again after measure.Water-plugging technology is looked for also to need to attack on frac water horizontal well Fractured water breakthrough is administered
Close and explore.
Both at home and abroad asynchronous oil recovery is adopted for note and study less, more do not have fracture development oil reservoir multistage frac water horizontal well note to adopt different
The research that step is recovered the oil.Current Fractured water breakthrough horizontal well mainly uses natural energy exhaustion formula development scheme, the method stratum energy
Amount reduction is fast, production decline is rapid, ultimate recovery is low.Therefore for oil production method after frac water horizontal well water breakthrough, need further
Deep seeks.Additionally, be directed to note to adopt asynchronous technique, affect in water injection rate, waterflood injection rate, oil recovery time, rate of oil production etc.
Water filling note adopts effective theoretical research analysis and test is also required to prove further.
Therefore the present invention is proposed for the new approaches of oil production method after fractured reservoir frac water horizontal well waterflooding extraction water breakthrough.
Content of the invention
In order to overcome the problem that existing oil production method stratum energy reduces, production decline is rapid, ultimate recovery is low, this
Bright offer a kind of Horizontal Well in Fractured Reservoir note adopts asynchronous recovery method.This oil production method make use of injection water with crack as matchmaker
Be situated between the effect with the crude oil generation imbibition displacement in reservoir rock, and its increasing yield is mainly handled up by Cyclic injection, filled
The hollow billet reverse imbibition effect of matrix is waved in distribution, replaces the crude oil in matrix sillar in crack and is exploited, thus realizes
Conventional waterflooding exploitation is difficult to the effective exploitation of the Fractured Low-Permeability Reservoir employed.
The technical solution used in the present invention is：
A kind of Horizontal Well in Fractured Reservoir note adopts asynchronous recovery method, concretely comprises the following steps：
1）Well is selected in constituency, chooses the natural microcrack of reservoir and grows, Fractured in waterflooding extraction multistage frac water horizontal well production process
Water breakthrough, when rising more than or equal to 1.5% water content average every day, the remaining oil in horizontal well control area is adopted asynchronous as note
Oil recovery horizontal well；
2）Oil recovery horizontal well closing well, water injection well water filling 80-100 side, oil recovery horizontal well closing well；
3）Water injection well closing well, after water injection well closing well, oil recovery horizontal well drives a well oil recovery, and the injection water entering in matrix sillar is detained
Getting off, the crude oil replacing out equivalent enters Fracture System, flows into pit shaft extraction；
4）Entering next one water filling, repeating step 2-3, note adopts asynchronous 8-10 the cycle.
Each water injection cycle is 60 days, and production cycle is 180 days.
Described step 2）In, in the injecting process, inject water under the double action of water injection pressure and capillary pressure, along opening
The intrinsic fracture opening and fractured horizontal well seam enter in the oil-containing hole of horizontal well surrounding substrate sillar.
In described the injecting process, strata pressure progressively recovers, and pressure is maintained at the 90-100% of original formation pressure, horizontal well
Region profit redistribution.
In described the injecting process, strata pressure progressively recovers, and pressure is maintained at the 95% of original formation pressure, horizontal well region
Profit redistributes.
Described step 3）In, after water injection well closing well, oil recovery horizontal well drives a well oil recovery, by existing between crack and matrix sillar
Pressure reduction accelerate capillary imbibition oil extraction effect, under displacement pressure reduction and capillary imbibition effect, make the note in entrance matrix sillar
Entering water to be detained to get off, the crude oil replacing out equivalent enters Fracture System, flows into pit shaft extraction.
Described step 2）Middle oil recovery horizontal well closing well, water injection well water filling 90 side.
Described step 4）It is 9 cycles that middle note is adopted asynchronous.
Beneficial effects of the present invention is：
1st, the Horizontal Well in Fractured Reservoir cyclic waterflooding oil production method of the present invention make use of injection water with crack as medium and storage
The effect of the crude oil generation imbibition displacement in layer rock, its increasing yield is mainly handled up by Cyclic injection, is given full play to
The hollow billet reverse imbibition effect of matrix, replaces the crude oil in matrix sillar in crack and is exploited, thus reduce water breakthrough water
The moisture content of horizontal well, raising well yield, supplementary stratum energy, it is achieved conventional waterflooding exploitation is difficult to the Fractured hyposmosis employed
The effective exploitation of oil reservoir.
2nd, compared with cluster well, multistage frac water horizontal well seam net system is grown, and increases reservoir man-made fracture and natural splits
Oil water contact area in seam, is more beneficial for improving Fractures in Low Permeability Reservoir and oozes ability with matrix friendship, can improve oil further
Hide overall imbibition effect of increasing production, increase substantially well yield, increase the recovery percent of reserves of crude oil.
3rd, Geological Engineering technique is simple, disclosure satisfy that and realizes that chronic energy is supplemented and the requirement of stable yields.
It is further detailed below with reference to accompanying drawing.
Brief description
Fig. 1 multistage frac water horizontal well note adopts asynchronous the injecting process schematic of fluid flow.
Fig. 2 multistage frac water horizontal well note adopts asynchronous oil recovery process schematic of fluid flow.
Fig. 3 note adopts asynchronous water injection well and producing well open and close well procedure chart.
In figure, reference：1 water injection well, 2 horizontal wells, 3 artificial fracturing cracks, the sky linked up between 4 injection-production wells
Right crack, 5 injection aqueous fluids, 6 injection water, 7 stratum oil and water miscible fluids, 8 profit miscible fluids.
Detailed description of the invention
Embodiment 1：
In order to overcome existing method stratum energy to reduce the problem fast, production decline is rapid, ultimate recovery is low, the present invention provides
A kind of Horizontal Well in Fractured Reservoir note as shown in Figure 1 and Figure 2 adopts asynchronous recovery method, present invention utilizes injection water to split
Seam is the effect of medium and the crude oil generation imbibition displacement in reservoir rock, and its increasing yield is mainly gulped down by Cyclic injection
Tell, give full play to the hollow billet reverse imbibition effect of matrix, replace the crude oil in matrix sillar in crack and exploited, thus
Realize that conventional waterflooding exploitation is difficult to the effective exploitation of the Fractured Low-Permeability Reservoir employed.
A kind of Horizontal Well in Fractured Reservoir note adopts asynchronous recovery method, concretely comprises the following steps：
1）Well is selected in constituency, chooses the natural microcrack of reservoir and grows, Fractured in waterflooding extraction multistage frac water horizontal well 2 production process
Water breakthrough, when rising more than or equal to 1.5% water content average every day, the remaining oil in horizontal well 2 control area is adopted asynchronous as note
Oil recovery horizontal well；
2）Oil recovery horizontal well closing well, water injection well 1 water filling 80-100 side, oil recovery horizontal well closing well；
3）Water injection well 1 closing well, after water injection well 1 closing well, oil recovery horizontal well drives a well oil recovery, enters the injection water 6 in matrix sillar stagnant
Staying, the crude oil replacing out equivalent enters Fracture System, flows into pit shaft extraction；
4）Entering next one water filling, repeating step 2-3, note adopts asynchronous 8-10 the cycle.
In in the present invention, well is selected in constituency, chooses the natural microcrack of reservoir and grows, and waterflooding extraction multistage frac water horizontal well produces
During Fractured water breakthrough, when rising more than or equal to 1.5% water content average every day, the remaining oil in horizontal well 2 control area
Adopt asynchronous oil recovery horizontal well as note；
Oil recovery horizontal well closing well, water injection well 1 water filling 80-100 side, oil recovery horizontal well closing well, in the injecting process, injects water 6 at note
Under the double action of water pressure and capillary pressure, enter into horizontal well 2 weeks along the intrinsic fracture opened and horizontal well 2 pressure-break
Enclosing in the oil-containing hole of matrix sillar, in the injecting process, strata pressure progressively recovers, and pressure is maintained at the 90-of original formation pressure
100%, horizontal well 2 region profit redistributes；
Water injection well 1 closing well, after water injection well 1 closing well, oil recovery horizontal well drives a well oil recovery, and the pressure reduction existing between crack and matrix sillar adds
The speed oil extraction effect of capillary imbibition, under displacement pressure reduction and capillary imbibition effect, makes injection water 6 quilt in entrance matrix sillar
Delay is got off, and the crude oil replacing out equivalent enters Fracture System, flows into pit shaft extraction.For preventing stratum from seriously deaerating, recover the oil the phase
The strata pressure at end should be slightly above saturation pressure；
Entering next one water filling, repeating step 2-3, note adopts asynchronous 8-10 the cycle.
Note and adopt the optimal water injection time of water injection well 1 about 60 days in asynchronous the injecting process, well group daily water-injection rate 80-100 side,
Cycle well group adds up about water injection rate 5500 side, and at the end of water filling, strata pressure level is maintained at 90-100%；
Fig. 1, Fig. 2 show that fractured reservoir multistage frac water horizontal well note adopts fluid stream in asynchronous the injecting process and oil recovery process
Dynamic schematic diagram.Water injection well 1, horizontal well 2 laterally has the intrinsic fracture 4 linked up between multiple artificial fracturing crack 3 and injection-production well, note
Well 1 is distributed in the surrounding of horizontal well 2, and four water injection wells 1 carry out water filling, injects aqueous fluid 5 and enters in crack, injects water 6 and enters
Enter Medium Culture, then in crack for stratum oil and water miscible fluids 7, intramatrical for profit miscible fluids 8.
In the case that water filling has occurred and that water breakthrough, matrix crude oil are locked by water seal, for expanding the floood conformance of matrix sillar
Volume, improves oil recovery factor and a kind of cyclic waterflooding mode of carrying out.
Note is adopted asynchronous cardinal principle and is：Close down oil well during water injection well 1 water filling, prevent injection water 6 along crack water breakthrough, at note
Under the double action of water pressure and capillary pressure, injection water 6 is made to enter in the oil-containing hole of matrix sillar deep part；Ground lamination
After power is recovered, water injection well 1 stops note, balances pressure field, makes the profit redistribution of whole region；Profit divides oil well after different a period of time
Reproducing, the pressure reduction existing between crack and matrix sillar accelerates the oil extraction effect of capillary imbibition, at displacement pressure reduction and capillary imbibition
Under effect, make the injection water 6 in more entrance matrix sillar be got off by delay, thus the crude oil replacing out equivalent enters crack system
System.Its essence is the favorable factor giving full play to Fracture System as water supply and oil flow channel, utilize displacement pressure reduction, matrix sillar
Compression and expansion, capillary imbibition effect etc., promote crude oil to flow to Fracture System from matrix sillar, thus expand the note of matrix sillar
Water swept volume, improves oil displacement efficiency.
Embodiment 2：
On the basis of based on above-described embodiment, in the present embodiment, each water injection cycle is 60 days, and production cycle is 180 days.
In the horizontal production well opening well and making production stage, production cycle about 180 days, about well yield 30 side, recover the oil end of term ground
Stressor layer is slightly above saturation pressure, and the cycle adds up about Liquid output 5500 side, and cycle note is adopted in a basic balance.
Described step 2）In, in the injecting process, inject water 6 under the double action of water injection pressure and capillary pressure, along
The intrinsic fracture opened and horizontal well 2 pressure-break enter in the oil-containing hole of horizontal well 2 surrounding substrate sillar.
In described the injecting process, strata pressure progressively recovers, and pressure is maintained at the 90-100% of original formation pressure, horizontal well
2 region profit redistributions.
After water injection well 1 closing well, oil recovery horizontal well drives a well oil recovery, accelerates hair by the pressure reduction existing between crack and matrix sillar
The oil extraction effect of pipe imbibition, under displacement pressure reduction and capillary imbibition effect, under making the injection water 6 in entrance matrix sillar be detained
Coming, the crude oil replacing out equivalent enters Fracture System, flows into pit shaft extraction.
Aqueous after horizontal well 2 Fractured water breakthrough rapidly increasing to more than 50%, even close to 100%, injecting water 6 major part is
Inefficient water injection, directly from horizontal well 2 output, and oil production rapid decrease, development effectiveness is deteriorated.So, after horizontal well 2 water breakthrough more
Early to adopt asynchronous exploitation effect better for metaideophone, it is proposed that moisture content>60% i.e. transfers note to adopts asynchronous oil recovery.
The Horizontal Well in Fractured Reservoir note using the present invention to provide adopts asynchronous recovery method, can effectively improve tar productivity, this
The research by fracture water breakthrough frac water horizontal well oil production method for the invention, improves recovery ratio for Horizontal Well in Fractured Reservoir exploitation
Provide a kind of effective yield increase.After fractured reservoir frac water horizontal well water breakthrough, note adopts asynchronous oil production method volume increase effect simultaneously
Substantially, cost of investment is low, good in economic efficiency, and Technological Economy risk is also well below profile control or water blockoff for fruit.
Embodiment 3：
On the basis of based on above-described embodiment, in the present embodiment, described step 2）Middle oil recovery horizontal well closing well, water injection well 1 water filling
90 sides.In described the injecting process, strata pressure progressively recovers, and pressure is maintained at the 95% of original formation pressure, horizontal well 2 region oil
Water redistributes.Repeat step 2）With step 3）Water filling, the process of oil recovery, the whole cycle elects 9 cycles as.
Note adopts asynchronous first cycle individual well daily output and cumulative oil production is the highest, aqueous minimum, after with aqueous
Rising, the minimizing of remaining oil, yield progressively successively decrease, aqueous gradually rise, and it is 9 cycles that optimal note adopts asynchronous periodicity.Note is adopted different
During step water injection well 1 and producing well drive a well, closing well process such as Fig. 3.
Simulation and forecast result shows, note adopts the asynchronous moisture content that Fractured water breakthrough well can be greatly lowered, due to water filling
Stratum energy is sufficient, and under imbibition metathesis, individual well liquid measure, oil production increase substantially, and individual well cumulative oil production and stage adopt
Go out degree also to increase substantially, it is contemplated that effectively note adopts asynchronous periodicity more than 8 cycles, and recovery percent of reserves can improve more than 2%.
After fractured reservoir frac water horizontal well Fractured water breakthrough, note is adopted the advantage of asynchronous development and is：Can effectively reduce water
Flood the moisture content of well, make full use of profit imbibition displacement simultaneously, stratum energy supplement principle improve oil recovery factor, inject in addition
Agent（Inject water 6）Cheap, resource is sufficient, running cost is relatively low.Can fully rely on the crack of seam net type, expand and inject water 6
With the contact area in crack, increase oil and water displacement amount further, simultaneously through water filling repeatedly, oil recovery process alternately, increase
Washing oil sweep area and displacement multiple, improve oil displacement efficiency, thus improve oil recovery factor.
The research by fracture water breakthrough frac water horizontal well oil production method for the present invention, for Horizontal Well in Fractured Reservoir exploitation
Improve recovery ratio and provide a kind of effective yield increase.After fractured reservoir frac water horizontal well water breakthrough, note adopts asynchronous oil recovery simultaneously
Method effect of increasing production is obvious, and cost of investment is low, good in economic efficiency, and Technological Economy risk is also well below profile control or water blockoff.
Embodiment 4：
On the basis of based on above-described embodiment, the present embodiment is newly appeased the border area mainly for Ordos Basin area fine and close oil oil reservoir.
This area is long 7 layers as one of fine and close oil test district of Changqing oilfields, fine and close oil reservoir, reservoir buried depth 2190-2570m, reservoir
Poor properties（The average pore 8.9% that core analysis obtains, mean permeability 0.12mD）, original formation pressure 15.8MPa.Should
The head of district 72Reservoir average oil layer thickness 10m, core analysis porosity 7%～9%, average 8.9%, permeability 0.1～0.2mD, averagely
0.12mD, the growth of reservoir intrinsic fracture, average crack grows 0.29/m of density, oil viscosity 1.23mPa s, density
0.74g/cm3, gas-oil ratio be 75.40m3/ t, saturation pressure 7.04MPa.Comprehensive analysis understands, this reservoir intrinsic fracture is grown, whole
Body oiliness is very poor, and hole, the condition of oozing are in conventional development cutoff, and this district's part of horizontal well 2 uses 5 points, seven spot pattern to carry out
Waterflooding extraction is tested, and result of the test shows that this district's Fractured water breakthrough phenomenon highlights, and how to supplement formation depletion energy, realizes precipitation
Increasing oil is this waterflooding extraction trial zone problems faced.
This district's typical water horizontal well is in finishing drilling in March, 2012, finishing drilling layer bit length 72Reservoir, horizontal section length 650m, oil reservoir bores
Encountering rate 93.5%, uses segmentation volume fracturing reforming technology, fracturing reform 6 sections, average single hop operational discharge capacity 4.5m3/ min, averagely
Single hop sand feeding amount 41m3, go into operation in August, 2012, go into operation initial stage oil-producing 2.0t/d, and aqueous 87.7%；The supporting water injection well of horizontal well 1 three
Mouthful, average Advance Water Injection 10 days, accumulative Advance Water Injection amount 286m.Owing to intrinsic fracture is grown, horizontal well is i.e. shown in injection after going into operation
Water 6, water blockoff and cyclic waterflooding effect are poor.Owing to water injection well 1 stops, stratum energy progressively declines, horizontal well Liquid output, oil-producing
Amount and producing fluid level are rapid decrease trend, development effectiveness difference.This well group in May, 2014 closing well come into effect note and adopt asynchronous note
Water, the individual well day injection allocation water yield 30 side, water injection time 60 days, horizontal well operation daily fluid production rate reaches 21.2m3/ d, day oil-producing reach
8.6t/d, aqueous is quickly down to about 53.5%.Can be seen that oil recovery note is adopted asynchronous development and supplemented stratum energy, improve list
Well production, reduce aqueous.
Now with following most preferred embodiment, the present invention is described, but is not limited to the scope of the present invention.If not specializing,
The conventional means that technological means used in embodiment is well known to those skilled in the art.
Claims (8)
1. a Horizontal Well in Fractured Reservoir note adopts asynchronous recovery method, it is characterised in that：Concretely comprise the following steps：
1）Well is selected in constituency, chooses the natural microcrack of reservoir and grows, waterflooding extraction multistage frac water horizontal well（2）Crack in production process
Property water breakthrough, when rising more than or equal to 1.5% water content average every day, horizontal well（2）Remaining oil in control area is adopted as note
Asynchronous oil recovery horizontal well；
2）Oil recovery horizontal well closing well, water injection well（1）Water filling 80-100 side, oil recovery horizontal well closing well；
3）Water injection well（1）Closing well, water injection well（1）After closing well, oil recovery horizontal well drives a well oil recovery, enters the injection water in matrix sillar
（6）Being got off by delay, the crude oil replacing out equivalent enters Fracture System, flows into pit shaft extraction；
4）Entering next one water filling, repeating step 2-3, note adopts asynchronous 8-10 the cycle.
2. a kind of Horizontal Well in Fractured Reservoir note according to claim 1 adopts asynchronous recovery method, it is characterised in that：Every time
Water injection cycle is 60 days, and production cycle is 180 days.
3. a kind of Horizontal Well in Fractured Reservoir note according to claim 1 adopts asynchronous recovery method, it is characterised in that：Described
Step 2）In, in the injecting process, inject water（6）Under the double action of water injection pressure and capillary pressure, natural along open
Crack and horizontal well（2）Pressure-break enters into horizontal well（2）In the oil-containing hole of surrounding substrate sillar.
4. a kind of Horizontal Well in Fractured Reservoir note according to claim 1 or 3 adopts asynchronous recovery method, it is characterised in that：
In described the injecting process, strata pressure progressively recovers, and pressure is maintained at the 90-100% of original formation pressure, horizontal well（2）Region
Profit redistributes.
5. a kind of Horizontal Well in Fractured Reservoir note according to claim 1 adopts asynchronous recovery method, it is characterised in that：Described
In the injecting process, strata pressure progressively recovers, and pressure is maintained at the 95% of original formation pressure, horizontal well（2）Region profit is again
Distribution.
6. a kind of Horizontal Well in Fractured Reservoir note according to claim 1 adopts asynchronous recovery method, it is characterised in that：Described
Step 3）In, water injection well（1）After closing well, oil recovery horizontal well drives a well oil recovery, is accelerated by the pressure reduction existing between crack and matrix sillar
The oil extraction effect of capillary imbibition, under displacement pressure reduction and capillary imbibition effect, makes the injection water in entrance matrix sillar（6）Stagnant
Staying, the crude oil replacing out equivalent enters Fracture System, flows into pit shaft extraction.
7. a kind of Horizontal Well in Fractured Reservoir note according to claim 1 adopts asynchronous recovery method, it is characterised in that：Described
Step 2）Middle oil recovery horizontal well closing well, water injection well（1）Water filling 90 side.
8. a kind of Horizontal Well in Fractured Reservoir note according to claim 1 adopts asynchronous recovery method, it is characterised in that：Described
Step 4）It is 9 cycles that middle note is adopted asynchronous.
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| CN109184656A (en) * | 2018-09-05 | 2019-01-11 | 大庆油田有限责任公司 | One kind, which adopting no note type and isolates well point, taps the latent power and proposes efficacious prescriptions method |
| CN109488274A (en) * | 2018-11-29 | 2019-03-19 | 重庆科技学院 | The fracturing yield increasing method of deep layer shale gas |
| CN109488274B (en) * | 2018-11-29 | 2020-10-16 | 重庆科技学院 | Deep shale gas fracturing production increasing method |
| CN111456693A (en) * | 2020-04-17 | 2020-07-28 | 中国石油大学(北京) | Method for supplementing formation energy by advanced gas injection and continuous gas injection of tight-shale oil reservoir |
| CN112360409A (en) * | 2020-11-03 | 2021-02-12 | 中国石油天然气股份有限公司 | Unstable injection-production method for high-angle fracture development carbonate reservoir |
| CN114592837A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气股份有限公司 | Injection and production adjusting method for horizontal well row shape facing injection and production well pattern in high water-cut period |
| CN115324542A (en) * | 2022-07-14 | 2022-11-11 | 中国石油大学(北京) | Multi-well-gap water injection oil extraction method and system for horizontal well with low-permeability tight reservoir |
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