CN109594961B - Combustible plugging process for water-based rosin emulsion water flooding fire flooding oil reservoir - Google Patents
Combustible plugging process for water-based rosin emulsion water flooding fire flooding oil reservoir Download PDFInfo
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- CN109594961B CN109594961B CN201910014160.4A CN201910014160A CN109594961B CN 109594961 B CN109594961 B CN 109594961B CN 201910014160 A CN201910014160 A CN 201910014160A CN 109594961 B CN109594961 B CN 109594961B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 title claims abstract description 33
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 title claims abstract description 33
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000000839 emulsion Substances 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 230000005465 channeling Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000011259 mixed solution Substances 0.000 claims abstract description 5
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 18
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 9
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 claims description 6
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 4
- 239000004343 Calcium peroxide Substances 0.000 claims description 2
- NGLMYMJASOJOJY-UHFFFAOYSA-O azanium;calcium;nitrate Chemical compound [NH4+].[Ca].[O-][N+]([O-])=O NGLMYMJASOJOJY-UHFFFAOYSA-O 0.000 claims description 2
- LHJQIRIGXXHNLA-UHFFFAOYSA-N calcium peroxide Chemical compound [Ca+2].[O-][O-] LHJQIRIGXXHNLA-UHFFFAOYSA-N 0.000 claims description 2
- 235000019402 calcium peroxide Nutrition 0.000 claims description 2
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 claims description 2
- 229910001487 potassium perchlorate Inorganic materials 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000004088 foaming agent Substances 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 29
- 239000007789 gas Substances 0.000 description 15
- 239000000295 fuel oil Substances 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007863 gel particle Substances 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Landscapes
- 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)
- Feeding And Controlling Fuel (AREA)
- Fire-Extinguishing Compositions (AREA)
Abstract
The invention discloses a combustible plugging process for a water-based rosin emulsion water flooding fire flooding oil reservoir. The process comprises the following steps: 1) selecting the solid content of the water-based rosin emulsion to be 30-40% according to the solid content and well conditions of the water-based rosin emulsion, and then adding 0.5-1% of a combustion improver for later use; 2) injecting the mixed solution obtained in the step 1) into a stratum by using injection equipment; 3) then injecting combustion-supporting channeling-sealing agent; 4) displacing air to the liquid level of the shaft to the lower boundary of an oil layer; 5) and starting the electric ignition device to start an ignition process. The principle of the invention is as follows: after the water-based rosin emulsion enters an oil layer, rosin is adsorbed on the surface of rock to reduce the pore throat of the stratum, so that the rosin is blocked but not dead, the plugging and channeling-preventing effects on the stratum are achieved to a certain extent, and after the oil layer is ignited, the rosin can be used as fuel for supplementary combustion. And an oxidation combustion improver and a foaming agent can be supplemented subsequently, so that the effects of combustion supporting and channeling prevention are assisted, and pollution-free uniform fireflooding is realized.
Description
Technical Field
The invention belongs to the field of oil field application. In particular to a combustible plugging process of a water-based rosin emulsion water flooding fire flooding oil reservoir.
Background
The fire flooding is to use heavy components in the crude oil of the stratum as fuel, use air or oxygen-enriched gas as combustion improver, adopt methods such as spontaneous combustion and manual ignition to enable the temperature of an oil layer to reach the ignition point of the crude oil, continuously inject the combustion improver into the oil layer to enable the crude oil of the oil layer to be continuously combusted, generate a large amount of heat through combustion reaction, heat the oil layer to enable the temperature of the oil layer to rise to 600-700 ℃, crack the heavy components at high temperature, and use the injected gas, light oil generated by cracking of heavy oil, gas generated by combustion and steam to drive the crude oil to flow to a production well and be extracted from the production well.
The oil extraction in-situ combustion has the major defects that the air is seriously overflowed, the upper part has large using degree, and when the oil is extracted to a certain degree, gas channeling can be caused, and particularly, the oil reservoir is developed, and the gas channeling degree is larger.
The current common ignition process causes uneven location utilization of the ignition layer, coking waste is generated in an oil layer which is not suitable for fireflooding, the resources which can be subsequently developed are greatly reduced, and the problem of coking waste is particularly serious for a heavy oil reservoir which is developed by steam huff and puff.
The technology for sealing channeling of heavy oil wells mainly comprises the types of conventional granular plugging agents such as cement and the like, high-temperature organic gel, thermosetting resin, gel granular plugging agents, foam plugging agents and the like. The conventional granular plugging agents such as cement have the defects of large particle size, no selectivity, easy reservoir damage and the like; the price of the high-temperature organic jelly is higher; the thermosetting resin has no selectivity, the curing speed is very sensitive to the temperature, and the controllability is poor; the gel particle plugging agent cannot be injected into the deep part of the stratum; the plugging strength of the foam water plugging agent is too low, and the stratum adaptability is poor.
Patent 201510909656.X discloses a fireflood channeling sealing agent and a preparation method thereof; patent 201410592158.2 discloses an in-situ combustion ignition method and apparatus; patent 201410592160.X discloses a combustion-supporting ignition method for in-situ combustion; patent 201510887763.7 discloses an oil well profile control agent and its preparation and application; patent 201611253606.1 discloses a sulfur-fixing combustion-supporting high-temperature profile control agent, a preparation method and application thereof; patent 201610617729.2 discloses an apparatus for injecting pulverized coal into an oil reservoir and a method of igniting an in-situ combustion; patent 201410592183.0 discloses a method and apparatus for profile control and channeling sealing in oil production; patent 201610116728.X discloses a profile control method for gas channeling channel of fireflood gas injection well and its pipe column; patent 201510887763.7 discloses an oil well profile control agent and its preparation and application; patent 201610454433.3 discloses a method for in situ combustion air foam profile control; experimental study on profile control and temporary plugging mechanism of thickened oil fireflood, inner Mongolia petrochemical industry, 1006-; a chemical regulation and control technology for a fire flooding injection and production well of a heavy oil reservoir, namely, a special oil and gas reservoir, 2016,23(5) 122-; research on the fire flooding development dynamic regulation and control technology of thin interbed heavy oil reservoirs, chemical engineering management 2014(20) 118-.
In the profile control method for the fire flooding oil reservoir mentioned in the patent and the article, the used profile control channeling sealing agent cannot be combusted, so that the problem of stratum pollution in different degrees exists, effective resources are wasted, and the improvement of the final recovery ratio is influenced.
Disclosure of Invention
In order to solve the technical problem, the invention provides a combustible plugging process for a water-based rosin emulsion water-flooded fire flooding oil reservoir, which is suitable for flooding a heavy oil reservoir, and a huff-puff fire flooding injection well with low oil saturation (water content of 95-98%) in a near-wellbore region is used for uniformly igniting and fully combusting.
In order to achieve the purpose, the invention adopts the following technical scheme:
a combustible plugging process for a water-based rosin emulsion water flooding fire flooding oil reservoir comprises the following steps:
1) according to the solid content and well condition of the water-based rosin emulsion, the solid content of the rosin emulsion is selected to be 30-40%, and then 0.5-1% of combustion improver is added for later use.
The invention selects the commercial water-based rosin emulsion which is rosin and ester emulsion thereof, also called as dispersed rosin gum, milky white with blue light liquid and has relative density of 1.06. The solid content is 48-50%, and the particle size is 0.1-0.2 μm. A pH of 4.5 to 6.5 and a viscosity (25 ℃) of 200 mPas.
2) Injecting the mixed solution obtained in the step 1) into a stratum by using injection equipment; preferably, the injection amount is 30 to 50 tons.
3) Then injecting combustion-supporting channeling-sealing agent; preferably, the injection amount of the combustion-supporting channeling sealing agent is 50-100 square.
4) The air is displaced to the liquid level of the shaft to the lower boundary of the oil layer.
5) And starting the electric ignition device to start an ignition process.
The invention mainly aims at an injection well which is used for handling and transferring fire flooding to ensure that ignition is uniform and combustion is sufficient and the ignition success rate is improved when a steam handling block in multiple rounds is flooded with water, the stratum depletion is serious, the oil saturation is low (the water content is 95-98 percent), and the gas channeling risk exists. The principle of the invention is as follows: after the water-based rosin emulsion enters an oil layer, rosin is adsorbed on the surface of rock to reduce the pore throat of the stratum, so that the rosin is blocked but not dead, the plugging and channeling-preventing effects on the stratum are achieved to a certain extent, and after the oil layer is ignited, the rosin can be used as fuel for supplementary combustion. And an oxidation combustion improver and a foaming agent can be supplemented subsequently, so that the effects of combustion supporting and channeling prevention are assisted, and pollution-free uniform fireflooding is realized.
Preferably, the combustion improver comprises one or more of oxidizing agents such as calcium peroxide, ammonium persulfate, calcium ammonium nitrate, potassium permanganate, potassium perchlorate and manganese dioxide.
Preferably, when the solid content of the emulsified aqueous rosin emulsion is higher than the selected use solid content, water is added to dilute the emulsion to the selected use solid content.
Preferably, the combustion-supporting channeling sealing agent is prepared by the following method: 40-50 wt% of dodecyl dimethyl betaine, 40-50 wt% of k-12 lauryl sodium sulfate and 10-20 wt% of ammonium persulfate; adding water to prepare a 1-5% solution. Wherein, dodecyl dimethyl betaine and k-12 dodecyl sodium sulfate are used as foaming agents, and ammonium persulfate is used as combustion improver.
In a preferred embodiment of the invention, the combustion-supporting channeling sealing agent is prepared by the following method: 40 wt% of dodecyl dimethyl betaine, 40 wt% of k-12 lauryl sodium sulfate and 20 wt% of ammonium persulfate; adding water to prepare a 1-5% solution.
Compared with the prior art, the invention has the following beneficial effects:
(1) the water-based blocking agent can enter the deep part of an oil layer.
(2) Adding combustion improver to burn fully.
(3) And (4) combustion-supporting plugging and double effects.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
Example 1:
the oil field fire flooding is injected into the well, the huff and puff is performed for 25 times, the water is flooded, the water content is 97 percent, and the data shows that the oil saturation of the steam huff and puff range is low. For smooth ignition, the following process is implemented:
1. an electric ignition tool is programmed.
2. 50 tons of water-based rosin emulsion with the solid content of 40 percent is selected and mixed with 0.2 ton of ammonium persulfate for standby.
3. And injecting the mixed solution into the stratum by using injection equipment. The injection pressure is 4.2MPa, and the injection speed is 20m3/h。
4. And then 100 parts of combustion-supporting channeling sealing agent (40% of dodecyl dimethyl betaine, 40% of k-12 lauryl sodium sulfate, 20% of ammonium persulfate, 1% of solution prepared by industrial grade clear water) is injected. The injection pressure is 4.0MPa, and the injection speed is 20m3/h。
5. Using 5000 standard square spaceAnd displacing the gas to ensure that the liquid level of the shaft reaches the lower boundary of the oil layer. Gas injection rate 9830Nm3And d, gas injection pressure of 5.5 MPa.
6. And starting the electric ignition device to start a normal ignition process. The designed ignition temperature of the well is more than 450 ℃, the maximum implementation power is 95KW, the actual ignition temperature is 478 ℃, the ignition is carried out for 19 days, and the gas injection speed is 10412Nm3D, gas injection pressure of 5.5-5.0-6.0 MPa.
7. The well is smoothly ignited, and gas channeling does not occur in the corresponding production well, so that the construction purpose is achieved.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (5)
1. A combustible plugging process for a water-based rosin emulsion water flooding fire flooding oil reservoir is characterized by comprising the following steps:
1) selecting the solid content of the water-based rosin emulsion to be 30-40% according to the solid content and well conditions of the water-based rosin emulsion, and then adding 0.5-1% of a combustion improver for later use;
the combustion improver comprises one or more of calcium peroxide, ammonium persulfate, calcium ammonium nitrate, potassium permanganate, potassium perchlorate and manganese dioxide;
2) injecting a mixed solution obtained by mixing the water-based rosin emulsion and the combustion improver in the step 1) into a stratum by using injection equipment;
3) then injecting combustion-supporting channeling-sealing agent;
the combustion-supporting channeling sealing agent is prepared by the following method: 40-50 wt% of dodecyl dimethyl betaine, 40-50 wt% of k-12 lauryl sodium sulfate and 10-20 wt% of ammonium persulfate; adding water to prepare a 1-5% solution;
4) displacing the air to enable the liquid level of the shaft to reach the lower boundary of an oil layer;
5) and starting the electric ignition device to start an ignition process.
2. The aqueous rosin emulsion flooding fire flooding reservoir burnable plugging process of claim 1, wherein when the solid content of the aqueous rosin emulsion is higher than the selected use solid content, water is added to dilute the aqueous rosin emulsion to the selected use solid content.
3. The aqueous rosin emulsion water flooding fire flooding reservoir combustible plugging process of claim 1, wherein the combustion supporting channeling sealing agent is prepared by the following method: 40 wt% of dodecyl dimethyl betaine, 40 wt% of k-12 lauryl sodium sulfate and 20 wt% of ammonium persulfate; adding water to prepare a 1-5% solution.
4. The combustible plugging process of the water-based rosin emulsion flooding fire flooding reservoir according to claim 1, wherein the injection amount of the mixed solution in the step 2) is 30-50 tons.
5. The water-based rosin emulsion water flooding fire flooding reservoir combustible plugging process as claimed in claim 1, wherein the injection amount of the combustion-supporting channeling sealing agent is 50-100 square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014160.4A CN109594961B (en) | 2019-01-08 | 2019-01-08 | Combustible plugging process for water-based rosin emulsion water flooding fire flooding oil reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014160.4A CN109594961B (en) | 2019-01-08 | 2019-01-08 | Combustible plugging process for water-based rosin emulsion water flooding fire flooding oil reservoir |
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| Publication Number | Publication Date |
|---|---|
| CN109594961A CN109594961A (en) | 2019-04-09 |
| CN109594961B true CN109594961B (en) | 2021-07-30 |
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| CN201910014160.4A Active CN109594961B (en) | 2019-01-08 | 2019-01-08 | Combustible plugging process for water-based rosin emulsion water flooding fire flooding oil reservoir |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071918A (en) * | 2010-12-22 | 2011-05-25 | 中国石油天然气集团公司 | Thick oil reservoir fire flooding oil extraction combustion-supporting ignition method |
| CN105696990A (en) * | 2016-03-02 | 2016-06-22 | 中国石油天然气股份有限公司 | Profile control method for gas channeling channel of fireflooding gas injection well and tubular column thereof |
| CN106317315A (en) * | 2015-06-26 | 2017-01-11 | 中国石油化工股份有限公司 | Plugging agent for oil reservoir fracture plugging |
| CN106869886A (en) * | 2017-02-03 | 2017-06-20 | 中国石油天然气股份有限公司 | Oil production method by pre-injecting air |
| CN108119092A (en) * | 2017-12-01 | 2018-06-05 | 中国石油天然气股份有限公司 | Selective channeling sealing agent for flooding oil reservoir fire flooding production well and application of selective channeling sealing agent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017100344A1 (en) * | 2015-12-08 | 2017-06-15 | Chevron U.S.A. Inc. | Methods for hydrocarbon recovery |
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2019
- 2019-01-08 CN CN201910014160.4A patent/CN109594961B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071918A (en) * | 2010-12-22 | 2011-05-25 | 中国石油天然气集团公司 | Thick oil reservoir fire flooding oil extraction combustion-supporting ignition method |
| CN106317315A (en) * | 2015-06-26 | 2017-01-11 | 中国石油化工股份有限公司 | Plugging agent for oil reservoir fracture plugging |
| CN105696990A (en) * | 2016-03-02 | 2016-06-22 | 中国石油天然气股份有限公司 | Profile control method for gas channeling channel of fireflooding gas injection well and tubular column thereof |
| CN106869886A (en) * | 2017-02-03 | 2017-06-20 | 中国石油天然气股份有限公司 | Oil production method by pre-injecting air |
| CN108119092A (en) * | 2017-12-01 | 2018-06-05 | 中国石油天然气股份有限公司 | Selective channeling sealing agent for flooding oil reservoir fire flooding production well and application of selective channeling sealing agent |
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