CN106634922A - Self generated gas foam oil-displacing agent liquid and application and injection increase and yield increase method thereof - Google Patents
Self generated gas foam oil-displacing agent liquid and application and injection increase and yield increase method thereof Download PDFInfo
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- CN106634922A CN106634922A CN201610822383.XA CN201610822383A CN106634922A CN 106634922 A CN106634922 A CN 106634922A CN 201610822383 A CN201610822383 A CN 201610822383A CN 106634922 A CN106634922 A CN 106634922A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
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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
Abstract
The invention discloses a self generated gas foam oil-displacing agent liquid and an application and injection increase and yield increase method thereof. The self generated gas foam oil-displacing agent liquid comprises a gas generation agent liquid and a gas release agent liquid, wherein the volume ratio of the gas generation agent liquid to the gas release agent liquid is 1:(1-1.2); the gas generation agent liquid is a 8-15% carbonate or bicarbonate solution; the gas release agent liquid is a solution comprising 6-12% inorganic acid, a 0.5-2% foaming agent, a 1-3% corrosion inhibitor and a 0.1-1% stabilizer. By adopting the self generated gas foam oil-displacing agent liquid, the pressure of a water injection well can be reduced, moreover, a water absorption profile can be improved, and the oil-displacing effect can be further improved.
Description
Technical field
The invention relates to but be not limited to a kind of foam flooding finish liquid, espespecially a kind of down-hole natural occuring bubbles foam oil displacement agent
Liquid and its method for application and augmented injection volume increase.
Background technology
Offshore oilfield water injection well mainly adopts big section sand-preventing process, and series of strata are more in sand control section, plane and vertical heterogeneity
Seriously, high permeability formation is advanced by leaps and bounds seriously after long-term injecting water, and non-available water circulation ratio is big, and less permeable layer employs difference；Water filling is received simultaneously
Water source is limited, and injection water quality condition is limited, there is near wellbore zone pollution problem.At this stage offshore oilfield is mainly using profile control and acid
Chemical industry skill solves the above problems, and more ripe technique is usually the profile control system based on gel and granular system and with fluoboric acid
With the tempered spline based on MH acid.It is general using implementing step by step on process implementing, acidifying de-plugging is implemented in advance, then enter
Row profile control operation, the overall operation cycle is longer.
The content of the invention
This application provides a kind of down-hole natural occuring bubbles foam oil displacement agent liquid and its application and the augmented injection in water injection well in oil fields
The method of volume increase, the foam flooding finish liquid energy enough reduces improving intake profile while water filling well pressure, further improves the displacement of reservoir oil
Efficiency.
This application provides a kind of natural occuring bubbles foam oil displacement agent liquid, the natural occuring bubbles foam oil displacement agent liquid includes inflating medium liquid
With bubble release agent liquid,
The volume ratio of the inflating medium liquid and the bubble release agent liquid is 1:1～1.2,
The inflating medium liquid is to include carbonate or bicarbonate aqueous solution that mass concentration is 8%～15%,
The bubble release agent liquid is to include inorganic acid, 0.5%～2% foaming agent, 1% that mass concentration is 6%～12%
The aqueous solution of～3% corrosion inhibiter and 0.1%～1% stabilizer.
In the application embodiment, the inorganic acid can be hydrochloric acid or MH acid.
In the application embodiment, the foaming agent can be alpha-alkene sulfonate.
In the application embodiment, the corrosion inhibiter can be imidazolines acidification corrosion inhibitor.
In the application embodiment, the stabilizer can be seawater Instant polymer.
In the application embodiment, the inflating medium liquid is to include carbonate or carbon that mass concentration is 10%～12%
The sour hydrogen salt aqueous solution.
Present invention also provides application of the natural occuring bubbles foam oil displacement agent liquid in water injection well in oil fields as above, wherein,
The natural occuring bubbles foam oil displacement agent liquid be applied to strata pressure higher than solution gas saturation pressure, 40 DEG C～100 DEG C of reservoir temperature,
Initial oil saturation is more than 40%, in water injection well of the underground crude oil viscosity less than 300mPas.
Present invention also provides a kind of use natural occuring bubbles foam oil displacement agent liquid augmented injection in water injection well in oil fields as above
The method of volume increase, methods described comprises the following steps：
The cumulative volume of the foam flooding finish liquid that need to be filled is calculated according to the core intersection of water injection well；
Water injection well is divided into two or more slugs；
The natural occuring bubbles foam oil displacement agent liquid and insulating liquid are injected into each slug, wherein, it is the inflating medium liquid, described
Insulating liquid and the bubble release agent liquid are implanted sequentially respectively；
Optionally, after a slug injection terminates, the injection of polymer solution in the slug.
In the application embodiment, polymer solution described in each slug and the natural occuring bubbles foam oil displacement agent liquid
Weight ratio is 0.07-0.17：1.
In the application embodiment, relative to the liquid volume of length 300-500m oil pipe, the volume of the insulating liquid
For 3-5m3。
In the application embodiment, in each slug, the inflating medium liquid, the insulating liquid and the bubble release agent liquid
It is implanted sequentially at twice or repeatedly.
In the application embodiment, the concentration of the polymer solution is 1000ppm～10000ppm.
In the application embodiment, the computational methods of the foam flooding finish liquid cumulative volume are：
VPore volume=π r2hвmKв
In formula：R is the distance between injecting slug from water injection well to producing well；
hвFor stratum is aqueous or permeable thickness；
M is porosity；
kвFor mother oil displacement coefficient；
VFoam flooding finish liquid cumulative volume=(0.5%～1.0%) VPore volume。
Compared with prior art, the application injects inflating medium and bubble release agent using segmentation to target zone, makes medicament directly exist
Reaction in oil reservoir forms carbon dioxide foam systems, and lives with acid solution, polymer and the surface contained in inflating medium and bubble release agent
Property agent immixture reaches acidifying de-plugging in layer, profile control and displacement of reservoir oil purpose in oil reservoir.In technical process, in the application
Acid solution can release near wellbore zone inorganic particle, iron dirt and calcium dirt blocking, recover near wellbore zone reservoir permeability；Inflating medium and release
Gas agent is released while the reaction of oil reservoir deep is angry with substantial amounts of heat, makes stratum and pit shaft heat up by heat transfer, solution
Except the contamination and plugging that organic matter colloid, asphalitine, wax etc. in stratum are caused；The preferential carbon dioxide generated in high permeability zone
The solution-air foam system for being stably difficult to spread is formed with polymer solution, makes later stage injection water produce larger additional drag, expanded
Big injection swept volume；Oil water interfacial tension effect and carbon dioxide are reduced by the effect of polymer viscoelastic, surfactant
The displacement of reservoir oil is acted on, and reaches volume increase purpose.
Bubble release agent in the application reacts carbon dioxide gas with inflating medium, while near wellbore zone blocking can be released,
Inorganic acid therein be hydrochloric acid or MH acid, foaming agent be alpha-alkene sulfonate, corrosion inhibiter be imidazolines acidification corrosion inhibitor,
Stabilizer is seawater Instant polymer.
Polymer solution is used for stable foam and closure high permeability formation.
Other features and advantage will be illustrated in the following description, also, the partly change from specification
Obtain it is clear that or being understood by implementing the application.The purpose of the application and other advantages can be by specification, rights
Specifically noted structure is realizing and obtain in claim and accompanying drawing.
Description of the drawings
Accompanying drawing is used for providing further understanding technical scheme, and constitutes a part for specification, with this
The embodiment of application is used to explain the technical scheme of the application together, does not constitute the restriction to technical scheme.
Fig. 1 is the process flow diagram of individual well group injection in the application Application Example 1.
Specific embodiment
Purpose, technical scheme and advantage to make the application becomes more apparent, below in conjunction with accompanying drawing to the application
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
The application provides a kind of down-hole natural occuring bubbles foam oil displacement agent liquid, including inflating medium liquid and bubble release agent liquid, the anger
The volume ratio of agent liquid and the bubble release agent liquid is 1:1～1.2, the inflating medium liquid includes the carbon that mass concentration is 8%～15%
Hydrochlorate or bicarbonate aqueous solution, the bubble release agent liquid including the inorganic acid that mass concentration is 6%～12%, 0.5%～2%
Foaming agent, 1%～3% corrosion inhibiter, the aqueous solution of 0.1%～1% stabilizer.
In one embodiment, inorganic acid can be hydrochloric acid or MH acid.
In one embodiment, foaming agent can be alpha-alkene sulfonate.
In one embodiment, corrosion inhibiter can be imidazolines acidification corrosion inhibitor.
In one embodiment, stabilizer can be seawater Instant polymer.
Present invention also provides application of the natural occuring bubbles foam oil displacement agent liquid in water injection well in oil fields as above, wherein,
The natural occuring bubbles foam oil displacement agent liquid can apply to strata pressure higher than solution gas saturation pressure, 40 DEG C of reservoir temperature～
100 DEG C, initial oil saturation is more than 40%, in water injection well of the underground crude oil viscosity less than 300mPas.
Present invention also provides a kind of use as above natural occuring bubbles foam oil displacement agent liquid augmented injection in water injection well in oil fields
The method of volume increase, methods described comprises the following steps：
The cumulative volume of the foam flooding finish liquid that need to be filled is calculated according to the core intersection of water injection well；
Water injection well is divided into two or more slugs；
The natural occuring bubbles foam oil displacement agent liquid and insulating liquid are injected into each slug, wherein, it is the inflating medium liquid, described
Insulating liquid and the bubble release agent liquid are implanted sequentially respectively；
Optionally, after a slug injection terminates, the injection of polymer solution in the slug.
In one embodiment, the weight of polymer solution described in each slug and the natural occuring bubbles foam oil displacement agent liquid
Amount ratio can be 0.07-0.17：1.
In one embodiment, relative to the liquid volume of length 300-500m oil pipe, the volume of the insulating liquid can
Think 3-5m3.In presently filed embodiment, the insulating liquid can be water.
In one embodiment, in each slug, the inflating medium liquid, the insulating liquid and the bubble release agent liquid point
It is implanted sequentially twice or repeatedly.
In one embodiment, the concentration of the polymer solution can be 1000ppm～10000ppm.
In one embodiment, the computational methods of the foam flooding finish liquid cumulative volume are：
VPore volume=π r2hвmKв
In formula：R is the distance between injecting slug from water injection well to producing well；
hвFor stratum is aqueous or permeable thickness；
M is porosity；
kвFor mother oil displacement coefficient；
VFoam flooding finish liquid cumulative volume=(0.5%～1.0%) VPore volume。
In above-mentioned formula, VFoam flooding finish liquid cumulative volumeLess than the 80% of water injection well daily water-injection rate, therefore at (0.5%～1.0%)
VPore volumeIn, the value of (0.5%～1.0%) can be selected according to water injection well daily water-injection rate.
Embodiment 1
A kind of natural occuring bubbles foam oil displacement agent liquid, including inflating medium liquid and bubble release agent liquid, the inflating medium liquid and the outgassing
The volume ratio of agent liquid is 1:1, the mass concentration that the inflating medium liquid includes is 8% aqueous sodium carbonate, the bubble release agent liquid
It is including mass concentration：7% hydrochloric acid, 0.5% alpha-alkene sulfonate foaming agent (PO-FASD；From CNOOC's clothes chemistry
Company), 1% 2-methylimidazole quinoline corrosion inhibiter (PA-CO23；Take chemical company from CNOOC), 0.1% seawater it is instant
The aqueous solution of type polymer (rule of origin takes chemical company in CNOOC).
Embodiment 2
A kind of down-hole natural occuring bubbles foam oil displacement agent liquid, including inflating medium liquid and bubble release agent liquid, the inflating medium liquid and described
The volume ratio of bubble release agent liquid is 1:1.2, the inflating medium liquid includes the sodium bicarbonate aqueous solution that mass concentration is 9%, described to release
Gas agent liquid includes the hydrochloric acid that mass concentration is 10%, 1% alpha-alkene sulfonate foaming agent (PO-FASD；From CNOOC's clothes
Chemical company), 1.5% 2-methylimidazole quinoline corrosion inhibiter (PA-CO23；Take chemical company from CNOOC), 0.3% sea
The aqueous solution of water Instant polymer (rule of origin takes chemical company in CNOOC).
Embodiment 3
A kind of down-hole natural occuring bubbles foam oil displacement agent liquid, including inflating medium liquid and bubble release agent liquid, the inflating medium liquid and described
The volume ratio of bubble release agent liquid is 1:1.1, the inflating medium liquid includes the aqueous sodium carbonate that mass concentration is 12%, the outgassing
Agent liquid includes the hydrochloric acid that mass concentration is 12%, 1.5% alpha-alkene sulfonate foaming agent (PO-FASD；From CNOOC's clothes
Chemical company), 1.8% 2-methylimidazole quinoline corrosion inhibiter (PA-CO23；Take chemical company from CNOOC), 0.8% sea
The aqueous solution of water speed insoluble polymer (rule of origin takes chemical company in CNOOC).
Application Example 1
Above-mentioned foam flooding finish liquid is used for into strata pressure above bubble point pressure, reservoir temperature is 50 DEG C, and initial oil is satisfied
It is 60% with degree, during underground crude oil viscosity is for the water injection well of 200mPas, the oil-water well corresponding relation in well is clearly, longitudinal, flat
The strong oil reservoir of face anisotropism.Closure slug concentration is 8000ppm polymer solutions, and specifically used concentration is according to high permeability formation
Permeability be adjusted.
The Time window of the application is that waterflooding effect becomes when block oil well comprehensive water cut 80%, rate of water cut increase are accelerated
Difference, water injection well injects the stage of pressure 12MPa.
As shown in figure 1, a kind of down-hole natural occuring bubbles foam reservoir oil displacing system, the application is noted by the foam flooding system
Enter, including inflating medium injected system, bubble release agent injected system and data collecting system 6, the inflating medium injected system includes angry
Agent holding vessel 1 and pump 2, the bubble release agent injected system includes injection pump 3, bubble release agent holding vessel 4, insulating liquid holding vessel 5.Inflating medium
Inflating medium, bubble release agent, insulating liquid in holding vessel 1, bubble release agent holding vessel 4, insulating liquid holding vessel 5 is respectively by pump 2 and injection
Pump 3 injects Highpressure Tee 8, and Highpressure Tee 8 respectively controls inflating medium holding vessel 1, bubble release agent holding vessel 4, insulating liquid holding vessel 5
Switch, that is, while controlling one of holding vessel opening, close other two holding vessel, and by Highpressure Tee 8 each component is made
Well head 9 is respectively enterd, pressure sensor 10 is provided with the pipeline between Highpressure Tee 8 and well head 9, well head 9 is provided with injection
Waterpipe 7.
The application is injected using oil pipe squeezing technique, and injection designing points are：Injection rate meets oil reservoir will with fluence
Ask；Operation pressure is less than formation fracture pressure.
One kind is used to generate carbon dioxide augmented injection method for increasing in water injection well layer using above-mentioned foam flooding finish liquid, including such as
Lower step：
The cumulative volume of the foam flooding finish liquid that need to be filled is calculated according to the core intersection of water injection well；Computational methods are：
VPore volume=π r2hвmKв
In formula：R is the distance between injecting slug from water injection well to producing well；
hвFor stratum is aqueous or permeable thickness；
M is porosity；
kвFor mother oil displacement coefficient；
VFoam flooding finish liquid cumulative volume=(0.5-1.0%) VPore volume
In above-mentioned formula, VFoam flooding finish liquid cumulative volumeLess than the 80% of water injection well daily water-injection rate, therefore (0.5～1.0%) VPore volumeIn
The value of (0.5%～1.0%) is adjusted according to water injection well daily water-injection rate.
According to the cumulative volume of foam flooding finish liquid, water injection well is divided into several slugs, when slug quantity is more than 6, each
Slug size is no more than 140m3.Such as table 1 below：
The cumulative volume and slug number of the foam flooding finish liquid of table 1
Averagely fill the foam flooding finish liquid successively into each slug, the fill order of each slug be inflating medium liquid+
3-5m3Insulating liquid+bubble release agent liquid+3-5m3Insulating liquid.
After bubble release agent liquid is filled, pressure drop 1-2MPa in slug, using 10m3Polymer solution blocks slug.
Stewing well 1 hour, recovers to carry out augmented injection by 1.2-1.5 times with fluence in water filling, pressure tolerance band.Monitoring,
Ask and carry out before and after operation apparent water injectivity index test, such as condition license, it is proposed that intake profile is tested；It is required that construction overall process monitoring is applied
Work discharge capacity and operation pressure；It is required that monitoring recovers water injection pressure and water injection rate after water filling, the benefited oil well of periphery is monitored weekly and is produced
Artificial situation
Alternatively, when water injection well has obvious high infiltration strip, to before water injection well injection foam flooding finish liquid, high concentration is injected
Polymer, high concentration polymer is used for the preposition closure of water injection well, and consumption is generally 20-60m3, its injection rate is according to water filling
The original injection rate injection of well, its injection pressure should be less than water injection well fracture pressure.
By taking the A23 wells of JZ25-1 oil fields as an example, the well core intersection common 90.3m, viscosity of crude 0.46-0.79mPas.Should
Well is particularly thorny in long-term water filling interlayer, layer, and the individual layer injected in water fingering and longitudinal direction in the plane is advanced by leaps and bounds seriously,
In order to improve displacement of reservoir oil by filling water efficiency, rate of water cut increase is controlled, it is ensured that oil field production capacity, implement to generate titanium dioxide in the layer of the application
Carbon augmented injection yield-increasing technique.Calculated according to detail design consumption, 740m is injected altogether3Solution：Inflating medium is mass percent 12%
Carbonate, inject 350m3.It is 9%HCl, 1.5%PA-CO23 corrosion inhibiter (CNOOC's clothes chemistry that bubble release agent is mass percent
Company), 1.5%PO-FASD foaming agents (CNOOC takes chemical company) and 0.5% seawater instant polymer (derive from middle sea
You Fu chemical companies) the aqueous solution, inject 390m3.Polymer solution is 3000ppm (CNOOC takes chemical company), is injected
50m3。
Water injection well is divided into eight slugs by the present embodiment, wherein,
First slug sequentially injects 20m into well3Inflating medium, 3m3Clear water, 22m3Bubble release agent, 3m3Clear water；
Second slug sequentially injects 30m into well3Inflating medium, 3m3Clear water, 33m3Bubble release agent, 3m3Clear water；
3rd slug sequentially injects 50m into well3Inflating medium, 3m3Clear water, 54m3Bubble release agent, 10m3Polymer；
4th slug sequentially injects 50m into well3Inflating medium, 3m3Clear water, 54m3Bubble release agent, 10m3Polymer；
5th slug sequentially injects 50m into well3Inflating medium, 3m3Clear water, 54m3Bubble release agent, 10m3Polymer；
6th slug sequentially injects 50m into well3Inflating medium, 3m3Clear water, 54m3Bubble release agent, 10m3Polymer；
7th slug sequentially injects 50m into well3Inflating medium, 3m3Clear water, 54m3Bubble release agent, 10m3Polymer；
8th slug sequentially injects 50m into well3Inflating medium, 3m3Clear water, 65m3Bubble release agent, 10m3Clear water.Complete JZ25-
Carbon dioxide augmented injection yield-increasing technique is generated in the layer of 1 oil field A23 wells.
JZ25-1 oil fields A23 wells take after above-mentioned measure water injection rate by 250m3/ d rises to 350m3/ d, augmented injection 83 days is tired out
Product augmented injection 4288m3.Intake profile test result shows that water absorbing capacity is suppressed in the high layer of injection index before and after measure,
The low layer water absorbing capacity of water accepting layer and injection index has not obtained certain lifting.5 mouthfuls of producing well in A23 well groups, wherein taking effect 3
Mouthful, accumulation has a net increase of oily 5500m3, the term of validity is half a year.
It can be seen that, the natural occuring bubbles foam oil displacement agent liquid that the application is provided has obvious augmented injection volume increase for water injection well in oil fields
Effect.
Although embodiment provided herein is as above, described content is only to readily appreciate the application and adopt
Embodiment, is not limited to the application.Technical staff in any the application art, is being carried without departing from the application
For spirit and scope on the premise of, any modification can be carried out in the form and details implemented with change, but the application
Scope of patent protection, still must be defined by the scope of which is defined in the appended claims.
Claims (10)
1. a kind of natural occuring bubbles foam oil displacement agent liquid, it is characterised in that the natural occuring bubbles foam oil displacement agent liquid include inflating medium liquid and
Bubble release agent liquid,
The volume ratio of the inflating medium liquid and the bubble release agent liquid is 1:1～1.2,
The inflating medium liquid is to include carbonate or bicarbonate aqueous solution that mass concentration is 8%～15%,
The bubble release agent liquid is to include inorganic acid, 0.5%～2% foaming agent, 1%～3% that mass concentration is 6%～12%
Corrosion inhibiter and 0.1%～1% stabilizer the aqueous solution.
2. natural occuring bubbles foam oil displacement agent liquid according to claim 1, wherein,
The inorganic acid is hydrochloric acid or MH acid；
The foaming agent is alpha-alkene sulfonate；
The corrosion inhibiter is imidazolines acidification corrosion inhibitor；
The stabilizer is seawater Instant polymer.
3. natural occuring bubbles foam oil displacement agent liquid according to claim 1 and 2, wherein, the inflating medium liquid is to include that quality is dense
Spend the carbonate or bicarbonate aqueous solution for 10%～12%.
4. application of the natural occuring bubbles foam oil displacement agent liquid described in claim 1 or 2 in water injection well in oil fields, it is characterised in that institute
State natural occuring bubbles foam oil displacement agent liquid and be applied to strata pressure above bubble point pressure, 40 DEG C～100 DEG C of reservoir temperature, initial oil is satisfied
It is more than 40%, in water injection well of the underground crude oil viscosity less than mPas with degree.
5. a kind of usage right requires the side of the natural occuring bubbles foam oil displacement agent liquid augmented injection volume increase in water injection well in oil fields described in 1 or 2
Method, it is characterised in that methods described comprises the following steps：
The cumulative volume of the foam flooding finish liquid that need to be filled is calculated according to the core intersection of water injection well；
Water injection well is divided into two or more slugs；
The natural occuring bubbles foam oil displacement agent liquid and insulating liquid are injected into each slug, wherein, the inflating medium liquid, the isolation
Liquid and the bubble release agent liquid are implanted sequentially respectively；
Alternatively, after a slug injection terminates, the injection of polymer solution in the slug.
6. method according to claim 5, wherein, polymer solution described in each slug drives with the natural occuring bubbles foam
The weight ratio of finish liquid is 0.07-0.17：1.
7. method according to claim 5, wherein, relative to the liquid volume of length 300-500m oil pipe, the isolation
The volume of liquid is 3-5m3。
8. method according to claim 7, wherein, in each slug, the inflating medium liquid, the insulating liquid and described
Bubble release agent liquid is implanted sequentially at twice or repeatedly.
9. augmented injection method for increasing according to claim 6, wherein, the concentration of the polymer solution be 1000ppm～
10000ppm。
10. augmented injection method for increasing according to claim 5, wherein, the computational methods of the foam flooding finish liquid cumulative volume
For：
VPore volume=π r2hвmKв
In formula：R is the distance between injecting slug from water injection well to producing well；
hвFor stratum is aqueous or permeable thickness；
M is porosity；
kвFor mother oil displacement coefficient；
VFoam flooding finish liquid cumulative volume=(0.5%～1.0%) VPore volume。
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| CN111793489A (en) * | 2020-08-03 | 2020-10-20 | 西南石油大学 | In-situ gas-generating foaming gel system for carbonate reservoir and application method thereof |
| CN111793489B (en) * | 2020-08-03 | 2022-07-01 | 西南石油大学 | In-situ gas-generating foaming gel system for carbonate reservoir and application method thereof |
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