CN113355076A - Heating material for thickened oil and application thereof - Google Patents
Heating material for thickened oil and application thereof Download PDFInfo
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- CN113355076A CN113355076A CN202110528394.8A CN202110528394A CN113355076A CN 113355076 A CN113355076 A CN 113355076A CN 202110528394 A CN202110528394 A CN 202110528394A CN 113355076 A CN113355076 A CN 113355076A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 46
- 239000000463 material Substances 0.000 title claims abstract description 38
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 63
- 239000003999 initiator Substances 0.000 claims abstract description 63
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 35
- 239000011259 mixed solution Substances 0.000 claims abstract description 25
- 239000000243 solution Substances 0.000 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 11
- 150000003863 ammonium salts Chemical class 0.000 claims abstract description 11
- 230000015556 catabolic process Effects 0.000 claims abstract description 7
- 238000006731 degradation reaction Methods 0.000 claims abstract description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical group [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 34
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical group [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 34
- 235000019270 ammonium chloride Nutrition 0.000 claims description 17
- 235000010288 sodium nitrite Nutrition 0.000 claims description 17
- 239000004280 Sodium formate Substances 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical group [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims description 10
- 235000019254 sodium formate Nutrition 0.000 claims description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 7
- 229940039748 oxalate Drugs 0.000 claims description 7
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical group [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims description 7
- 229940039790 sodium oxalate Drugs 0.000 claims description 7
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims description 6
- 150000004675 formic acid derivatives Chemical class 0.000 claims 1
- 239000003921 oil Substances 0.000 description 40
- 238000006722 reduction reaction Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 230000003197 catalytic effect Effects 0.000 description 7
- 230000001603 reducing effect Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C09K8/592—Compositions used in combination with generated heat, e.g. by steam injection
Abstract
The invention discloses a heating material for thickened oil and application thereof, and belongs to the technical field of thickened oil viscosity reduction exploitation. The heating material for the thick oil comprises a heat generating agent and an initiator, wherein the initiator is mixed with the heat generating agent to realize heating, the heat generating agent is a mixed solution of ammonium salt, nitrite and a carbon supply body, and the initiator is a phosphoric acid solution. The invention also comprises the application of the heating material for the thick oil in the degradation of the thick oil. The heating material provided by the invention can reduce the viscosity of the thick oil, increase the temperature and accelerate the degradation speed of the thick oil.
Description
Technical Field
The invention relates to the technical field of thickened oil viscosity reduction exploitation, in particular to a heating material for thickened oil and application thereof.
Background
The high relative analytical amount of asphaltenes and colloid content in the heavy oil results in high viscosity, high solidification point and poor fluidity in the stratum, and the heavy oil is difficult to effectively recover by adopting a conventional method. The mining techniques currently in use can be summarized as thermal, physical, chemical and biological.
Among these mining techniques, the thermal recovery technique mainly involving steam injection is most widely used, but the steam throughput and steam flooding in thermal recovery are limited by various factors such as crude oil viscosity, oil layer thickness, burial depth, and short-term slight viscosity reduction, and are effective only for thick oil having a viscosity of 10000mPa · S or less, and are not effective for ultra-thick oil having a high viscosity.
The thick oil catalytic oxidation can increase the saturation in the product and reduce the colloid in the product, and the catalytic viscosity reduction process has high catalytic efficiency and good viscosity reduction effect, and the reaction temperature range is 80-180 ℃. The reservoir oil deposit temperature is generally between 50 ℃ and 80 ℃, the catalytic oxidation reaction temperature is relatively low, but the oil layer temperature still does not reach the reaction temperature.
Disclosure of Invention
The invention aims to overcome the technical defects, provides a heating material for thick oil and application thereof, and solves the technical problems that the oil layer temperature is not high and the temperature required by catalytic viscosity reduction is difficult to reach in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention provides a heating material for thick oil and application thereof.
The invention provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of ammonium salt, nitrite and a carbon donor, and the initiator is a phosphoric acid solution.
Further, in the mixed solution, the mass concentration of the nitrite is 30-50%, and the mass concentration of the ammonium salt is 25-35%.
Further, in the mixed solution, the mass concentration of the carbon donor is 31 to 53%.
Further, the carbon donor is one or two of oxalate and formate.
Further, the oxalate salt is sodium oxalate.
Further, the formate is sodium formate.
Further, the mass concentration of phosphoric acid in the phosphoric acid solution is 3-10%.
Further, the ammonium salt is ammonium chloride; and/or, the nitrite is sodium nitrite.
Further, when the heat generating agent and the initiator are mixed, the heat generating agent and the initiator are mixed according to the volume ratio of 10: 2-3.
The invention also provides an application of the heating material for the thick oil in the degradation of the thick oil, which comprises the steps of mixing the heating agent with the thick oil, adding the initiator for continuous mixing, and adding the viscosity reducer for realizing viscosity reduction.
Compared with the prior art, the invention has the beneficial effects that: the heat generation agent is a mixed solution of ammonium salt, nitrite and carbon donor, the heat generation agent is a phosphoric acid solution, the heating reaction of the mixed heat generation agent and the initiator belongs to spontaneous reaction, the heat generation agent realizes oxidation-reduction reaction in an acid environment to generate a large amount of heat, and carbon dioxide, nitrogen and nitric oxide gas are generated, so that the gas yield is large; the generated heat can ensure the low-temperature catalytic oxidation reaction, the generated gas can promote the thick oil of the reservoir to flow and accelerate the degradation speed, and particularly the generated carbon dioxide gas can reach the supercritical Condition (CO) in the oil reservoir environment2The critical temperature is 31.26 ℃, the critical pressure is 72.9atm), the diffusion coefficient is 100 times of that of liquid, the viscous crude oil viscosity reducing agent has excellent dissolving capacity, the viscous crude oil viscosity reducing agent provides viscosity reducing conditions for viscosity reducing exploitation of viscous crude oil, and then the degradation speed of the viscous crude oil is accelerated while the temperature is increased for viscosity reducing of the viscous crude oil.
Detailed Description
The specific embodiment provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator is mixed with the heat generating agent to realize heating, the heat generating agent is a mixed solution of ammonium salt, nitrite and a carbon donor, and the initiator is a phosphoric acid solution; the mass concentration of nitrite in the mixed solution is 30-50%, the mass concentration of ammonium salt is 25-35%, and the mass concentration of the carbon donor is 31-53%;
further, the carbon donor is one or two of oxalate and formate; in the mixed solution, the mass concentration of the oxalate is 1-3%, and the mass concentration of the formate is 30-50%; the oxalate is sodium oxalate, and the formate is sodium formate;
the concentration of phosphoric acid in the phosphoric acid solution is 3% -10%; the ammonium salt is ammonium chloride; and/or, the nitrite is sodium nitrite;
when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 10: 2-3.
The chemical reaction equation involved is as follows (phosphoric acid as initiator provides an acidic environment for the reaction):
the specific embodiment further comprises an application of the heating material for the thick oil in degradation of the thick oil, wherein the application comprises the steps of mixing the heating agent with the thick oil, adding the initiator for continuous mixing, and adding the viscosity reducer for viscosity reduction.
In the process of developing the heating material, the applicant also tries to use hydrochloric acid as the initiator, but finds that hydrochloric acid as the initiator generates a large amount of nitric oxide and nitrogen dioxide, so that the heating effect is not good, and later, considering that phosphoric acid is subjected to multi-stage dissociation, the generation of nitric oxide and nitrogen dioxide can be reduced, and after phosphoric acid is used as the initiator, the yield of nitric oxide and nitrogen dioxide is actually relatively reduced, the heating effect is obviously better, and the temperature at normal temperature can be increased by 50-60 ℃.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of ammonium chloride, sodium nitrite and sodium oxalate, and the initiator is a phosphoric acid solution; the mass concentration of ammonium chloride, sodium nitrite and sodium oxalate in the mixed solution is 25%, 30% and 1%; the mass concentration of phosphoric acid in the phosphoric acid solution is 3%; when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 5: 1.
Example 2
The embodiment provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of ammonium chloride, sodium nitrite and sodium oxalate, and the initiator is a phosphoric acid solution; the mass concentration of ammonium chloride in the mixed solution is 32%, the mass concentration of sodium nitrite is 41%, and the mass concentration of sodium oxalate is 2%; the mass concentration of phosphoric acid in the phosphoric acid solution is 5%; when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 5: 1.
Example 3
The embodiment provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of ammonium chloride, sodium nitrite and sodium formate, and the initiator is a phosphoric acid solution; the mass concentration of ammonium chloride in the mixed solution is 25%, the mass concentration of sodium nitrite is 30%, and the mass concentration of sodium formate is 30%; the mass concentration of phosphoric acid in the phosphoric acid solution is 3%; when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 5: 1.
Example 4
The embodiment provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of ammonium chloride, sodium nitrite and sodium formate, and the initiator is a phosphoric acid solution; the mass concentration of ammonium chloride in the mixed solution is 32%, the mass concentration of sodium nitrite is 41%, and the mass concentration of sodium formate is 40%; the mass concentration of phosphoric acid in the phosphoric acid solution is 5%; when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 5: 1.
Example 5
The embodiment provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of ammonium chloride, sodium nitrite and sodium formate, and the initiator is a phosphoric acid solution; the mass concentration of ammonium chloride in the mixed solution is 32%, the mass concentration of sodium nitrite is 41%, and the mass concentration of sodium formate is 40%; the concentration of phosphoric acid in the phosphoric acid solution is 10 percent; when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 10: 3.
Comparative example 1
The comparative example provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of ammonium chloride and sodium nitrite, and the initiator is a phosphoric acid solution; the mass concentration of ammonium chloride in the mixed solution is 25%, and the mass concentration of sodium nitrite is 30%; the mass concentration of phosphoric acid in the phosphoric acid solution is 5%; when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 5: 1.
Comparative example 2
The comparative example provides a heating material for thick oil, which comprises a heat generating agent and an initiator, wherein the initiator and the heat generating agent are mixed to realize heating, the heat generating agent is a mixed solution of sodium nitrite and ammonium chloride, and the initiator is a phosphoric acid solution; the mass concentration of ammonium chloride in the mixed solution is 40%, and the mass concentration of sodium nitrite is 40%; the mass concentration of phosphoric acid in the phosphoric acid solution is 5%; when the heat generating agent is mixed with the initiator, the heat generating agent and the initiator are mixed according to the volume ratio of 5: 1.
Application example
The heating materials in the above examples 1-5 and comparative examples 1-2 are used for degrading Tuha thick oil (viscosity is 36650mPa · s at 50 ℃), specifically, the heating agent in each example or comparative example is mixed with the thick oil according to the volume ratio of 1:50, then the initiator is added for continuous mixing, then the thick oil viscosity reducing agent with the model number cy-152408 purchased from Shandong Changyao new material Co., Ltd is added for viscosity reduction, the viscosity reduction rate is detected at 1.5h and 3h, and the mass ratio of the viscosity reducing agent to the thick oil is 1: 100; in addition, the viscosity reduction was carried out at normal temperature (25 ℃ C.) as a blank control at a mass ratio of the viscous oil viscosity reducer to the viscous oil of 1:100 without adding the heat generating material, and the results are shown in Table 1.
TABLE 1 Detack rates for examples 1-5, comparative examples 1-2, and blank control
| Viscosity reduction Rate (%) at 1.5h | Viscosity reduction ratio (%) at 3h | |
| Example 1 | 55.7 | 56.1 |
| Example 2 | 57.3 | 58.9 |
| Example 3 | 65.1 | 74.1 |
| Example 4 | 68.4 | 79.8 |
| Example 5 | 63.4 | 70.2 |
| Comparative example 1 | 32.9 | 45.7 |
| Comparative example 2 | 39.6 | 52.7 |
| Blank control | 12.7 | 22.4 |
It can be known from table 1 that, under the effect of the heating material of this embodiment, the viscosity reducing rate of the viscosity reducing agent for sodium formate in the heating agent for degrading the thick oil for 3 hours can reach 79.8%, and the viscosity reducing effect of the heating material for oxalate is lower, only 58.9%, and the viscosity reducing effect of the heating material without carbon is worse, and in addition, the viscosity reducing effect of the viscosity reducing agent without heating material can be seen from the blank comparison.
During on-site construction, a heat generating agent is firstly injected into an underground oil reservoir to be mixed with thickened oil, water is used as an isolating liquid, then an initiator is injected, the heat generating agent and the initiator are contacted and mixed in the underground oil reservoir, chemical self-heating is realized, a temperature environment is provided for subsequent low-temperature catalytic oxidation viscosity reduction of the thickened oil, and viscosity reduction is further realized.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The heating material for the thick oil is characterized by comprising a heat generating agent and an initiator, wherein the initiator is mixed with the heat generating agent to realize heating, the heat generating agent is a mixed solution of ammonium salt, nitrite and a carbon supply body, and the initiator is a phosphoric acid solution.
2. The heat-generating material according to claim 1, wherein the nitrite is present at a concentration of 30 to 50% by mass and the ammonium salt is present at a concentration of 25 to 35% by mass in the mixed solution.
3. The heat-generating material according to claim 1, wherein the mass concentration of the carbon donor in the mixed solution is 31 to 53%.
4. The heat-generating material according to claim 1, wherein the carbon donor is one or both of oxalate and formate.
5. The heat-generating material according to claim 4, wherein the oxalate is sodium oxalate.
6. The heat-generating material according to claim 4, wherein the formate salt is sodium formate.
7. The heat-generating material according to claim 1, wherein a mass concentration of phosphoric acid in the phosphoric acid solution is 3% to 10%.
8. The heat-generating material according to claim 1, wherein the ammonium salt is ammonium chloride; and/or, the nitrite is sodium nitrite.
9. The heat-generating material according to claim 1, wherein the heat-generating agent and the initiator are mixed in a volume ratio of 10: 2-3.
10. The use of the exothermic material for thick oil according to any one of claims 1 to 9 in the degradation of thick oil, wherein the exothermic material is prepared by mixing the exothermic agent with the thick oil, adding the initiator, continuing the mixing, and adding the viscosity reducer to achieve viscosity reduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110528394.8A CN113355076A (en) | 2021-05-14 | 2021-05-14 | Heating material for thickened oil and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110528394.8A CN113355076A (en) | 2021-05-14 | 2021-05-14 | Heating material for thickened oil and application thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN113355076A true CN113355076A (en) | 2021-09-07 |
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Family Applications (1)
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| CN202110528394.8A Pending CN113355076A (en) | 2021-05-14 | 2021-05-14 | Heating material for thickened oil and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116179176A (en) * | 2023-03-07 | 2023-05-30 | 西南石油大学 | Autogenous heat viscosity-reducing system and application thereof |
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|---|---|---|---|---|
| GB431935A (en) * | 1933-12-15 | 1935-07-15 | James Taylor | Improved blasting charge |
| US4482016A (en) * | 1983-11-17 | 1984-11-13 | Shell Oil Company | Acidizing with chemically heated weak acid |
| CN1091457A (en) * | 1994-01-26 | 1994-08-31 | 阎树型 | Chemical, thermal, washing dredging agent |
| US20140262243A1 (en) * | 2013-03-15 | 2014-09-18 | Suncor Energy, Inc. | Systems and Methods for Accelerating Production of Viscous Hydrocarbons in a Subterranean Reservoir with Thermally Activated Chemical Agents |
| CN108952651A (en) * | 2018-06-29 | 2018-12-07 | 西安石油大学 | A method of increasing steamed well shaft bottom mass dryness fraction |
| CN111793486A (en) * | 2020-07-15 | 2020-10-20 | 西安中孚凯宏石油科技有限责任公司 | Carbon dioxide gas-thermal composite blocking remover, preparation method and application thereof |
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2021
- 2021-05-14 CN CN202110528394.8A patent/CN113355076A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB431935A (en) * | 1933-12-15 | 1935-07-15 | James Taylor | Improved blasting charge |
| US4482016A (en) * | 1983-11-17 | 1984-11-13 | Shell Oil Company | Acidizing with chemically heated weak acid |
| CN1091457A (en) * | 1994-01-26 | 1994-08-31 | 阎树型 | Chemical, thermal, washing dredging agent |
| US20140262243A1 (en) * | 2013-03-15 | 2014-09-18 | Suncor Energy, Inc. | Systems and Methods for Accelerating Production of Viscous Hydrocarbons in a Subterranean Reservoir with Thermally Activated Chemical Agents |
| CN108952651A (en) * | 2018-06-29 | 2018-12-07 | 西安石油大学 | A method of increasing steamed well shaft bottom mass dryness fraction |
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| CN116179176A (en) * | 2023-03-07 | 2023-05-30 | 西南石油大学 | Autogenous heat viscosity-reducing system and application thereof |
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Application publication date: 20210907 |