CN1554725A - Thickened oil steam production synergist and its preparing method - Google Patents
Thickened oil steam production synergist and its preparing method Download PDFInfo
- Publication number
- CN1554725A CN1554725A CNA021533377A CN02153337A CN1554725A CN 1554725 A CN1554725 A CN 1554725A CN A021533377 A CNA021533377 A CN A021533377A CN 02153337 A CN02153337 A CN 02153337A CN 1554725 A CN1554725 A CN 1554725A
- Authority
- CN
- China
- Prior art keywords
- agent
- viscous crude
- alkali
- sodium hydroxide
- crude steam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title description 6
- 238000004519 manufacturing process Methods 0.000 title description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 45
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 32
- 239000003513 alkali Substances 0.000 claims abstract description 21
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 16
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000004202 carbamide Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 239000012747 synergistic agent Substances 0.000 claims description 27
- 239000004088 foaming agent Substances 0.000 claims description 16
- 235000017550 sodium carbonate Nutrition 0.000 claims description 15
- 239000013543 active substance Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 10
- -1 phenolic aldehyde Chemical class 0.000 claims description 8
- 150000003839 salts Chemical class 0.000 claims description 8
- 229920001732 Lignosulfonate Polymers 0.000 claims description 6
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 3
- 241000158728 Meliaceae Species 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 abstract description 6
- 239000006260 foam Substances 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 235000011089 carbon dioxide Nutrition 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229960004424 carbon dioxide Drugs 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 101100365461 Caenorhabditis elegans sepa-1 gene Proteins 0.000 description 1
- 101710110539 Probable butyrate kinase 1 Proteins 0.000 description 1
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- Y02P20/121—
Landscapes
- Lubricants (AREA)
- Cosmetics (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The synergist for steam exploitin thickened oil consists of gas creating agent 10-40 wt%, surfactant 5-25 wt% and alkali 0-5 wt% except water. The preparation process includes the steps of: dissolving sodium hydroxide and/or sodium carbonate; adding surfactant via stirring for mixing and adding the gas creating agent via stirring. Under steam temperature urea as the gas creating agent is decomposed to generate CO2 and CO2 and the surfactant form foam to expand the steam wave and volume to raise the oil displacing efficiency and reach the synergistic effects of modifying profile and lower viscosity obviously. The present invention is suitable for exploiting shallow, thin, dense and dispersed thickened oil reservoir. The present invention can raise oil yield and steam heat efficiency.
Description
Technical field
The present invention relates to the oil production chemical field, is a kind of viscous crude steam exploitation synergistic agent and preparation method thereof.
Background technology
The synergistic agent that present domestic oil-field thick-oil steam uses when exploiting is single surfactant or bases, though surfactant-based steam synergistic agent viscosity break ratio height, the cost height influences industrialization and uses, and is difficult to be accepted.Though bases steam synergistic agent is cheap, the working concentration narrow range, on-the-spot wayward.In addition, this two classes steam synergistic agent is better in heavy oil exploitation via steam injection initial stage effect, but along with the increase of steam stimulation round, the viscous crude stratum deposit the thermo-efficiency that increase can influence injecting steam, even add tensio-active agent or bases steam synergistic agent again, the condition of production also goes from bad to worse.
Water vapor and urea were once injected to replace tensio-active agent or bases steam synergistic agent to the stratum in some oil fields.Under the about 150 ℃ of conditions of temperature, urea decomposition is carbonic anhydride and ammonia, and both are than being 1: 2, and thermal field, carbonic anhydride and alkali (ammonia soln) are had an effect to the stratum subsequently.From 63 subjobs in year January in April, 1987 to 1993, inject 1,200 ton of urea altogether, measure increases 23,214 tons of oil.After the measure, oil reservoir has all improved in the degree that involves on horizontal and vertical, and the thermo-efficiency of steam is improved.
But this method is just utilized the driving energy of urea decomposition gas increase steam, inapplicable shallow, thin, thick, diffusing heavy crude reservoir, and single chemical viscosity reduction or profile control technique are only used in steam synergy, or profile control and viscosity reduction proceed in two phases, and make construction procedure many, cycle is long, drops into high.
Summary of the invention
The object of the present invention is to provide a kind of heavy crude reservoir shallow, thin, thick, that loose that is suitable for, improve a kind of viscous crude steam exploitation synergistic agent of gas oil ratio and production factor, oil displacement efficiency and preparation method thereof.
The present invention adopts following technical scheme:
A kind of viscous crude steam exploitation synergistic agent is composited by foaming agent, tensio-active agent and alkali, and the weight % ratio of its each component concentration is: foaming agent 10-40, tensio-active agent 5-25, alkali 0-5, all the other are water.
The present invention also adopts following technical scheme:
Foaming agent can be volatile salt, bicarbonate of ammonia and urea.The most frequently used is urea, and technical grade purity is more than 95%.
Concentration was 10-20% when foaming agent was volatile salt; Concentration is 10-30% during for bicarbonate of ammonia.
Alkali can be that sodium hydroxide, yellow soda ash also can be the mixtures of sodium hydroxide and yellow soda ash.The most frequently used is sodium hydroxide, and technical grade purity is more than 95%.
When concentration was to use the mixture of sodium hydroxide or sodium hydroxide and yellow soda ash when alkali used yellow soda ash separately 2 times, the ratio of mixture of sodium hydroxide and yellow soda ash is 1: 2.
Tensio-active agent can be alkali lignin Sulfonates, phenolic aldehyde polyethers viscosity-depression agent, preferably alkali lignin sulfonate.
Also can use mahogany acid salt or ether alcohol sulfate class whipping agent, preferably ether alcohol sulfate.
The invention provides a kind of preparation method of viscous crude steam exploitation synergistic agent, its preparation process is:
(1) dissolved hydrogen sodium oxide, yellow soda ash or sodium hydroxide and sodium carbonate mixture;
(2) add tensio-active agent down at 0 ℃～40 ℃ and mix stirring 0.5～1 hour;
(3) adding foaming agent down at 0 ℃～40 ℃ stirred 1～2 hour.
The urea that the present invention adds in synergistic agent, its decomposition gas can produce higher pressure and drive energy under vapor temperature, can enlarge the steam heating radius fast, improve the exploitation effect of earth formation deep viscous crude, be applicable to heavy crude reservoir shallow, thin, thick, that loose.
Construction technology of the present invention is simple, the cycle short, can enlarge steam heating radius and swept volume to the handle up high ponding oil reservoir of low pressure of development late stage of high cycle, reduce stratum ponding, improve the peak value oil offtake, steam heat efficient, average individual well gas oil ratio improves 116% in the rig-site utilization, production factor improves 114%, and the oil well of using this technology shows one-period and implements, and the obvious characteristic that the multicycle is imitated is subjected to continuously at present to imitate and is up to 4 more than the cycle.
The present invention not only utilizes urea decomposition gas to increase the driving energy of steam, also utilize urea decomposition to produce carbonic acid gas and enlarge the steam swept volume with tensio-active agent formation foam, has the double effects that improves oil displacement efficiency and enlarge the steam swept volume, the synergistic process that two steps of former profile control viscosity reduction are walked is once realized, effect is remarkable, and ton urea oil increment reaches 93.6 tons.
Embodiment
Each embodiment component of synergistic agent 1-6 of the present invention and configuration condition such as following table:
The present invention uses volatile salt, bicarbonate of ammonia, urea, sodium oxide, yellow soda ash to adopt the commercially available prod, and its technical grade purity is more than 95%.The tensio-active agent that the present invention uses can be alkali lignin Sulfonates, phenolic aldehyde polyethers viscosity-depression agent, preferably alkali lignin sulfonate.As SEPA-1, WPS-3, GL-1, KW-1 and BK-1 etc.Tensio-active agent also can use mahogany acid salt or ether alcohol sulfate class whipping agent, preferably ether alcohol sulfate.As LAS, TAS, SS02, HR9801, SD1020 etc.
This adds in proper order that stirring and dissolving becomes uniform solution in certain water gaging according to alkali, pyrometer surface-active agent and foaming agent in the present invention.Earlier alkali is dissolved in certain water gaging, solution temperature raises, and more a certain amount of high temperature emulsifying pour depressor is added wherein, after stirring, adds a certain amount of foaming agent to dissolving fully.The foaming agent dissolving is an endothermic process, adds alkali dissolution earlier, and solution temperature is raise, and helps the dissolving of foaming agent.The steam synergistic agent dispersiveness and the good fluidity that prepare are easy to transportation, storage and on-the-spot the injection.
The present invention adopts slug formula or instillation formula injection technology in use, and the steam synergistic agent is injected the viscous crude stratum.At acid number height in the viscous crude, contain organic acid and nonacid oxidiferous characteristics, in prescription, add the alkali number of various proportionings.
At viscous crude stratum injection water retaining in reservoir height, the characteristics that reservoir pressure is low add foaming agent in prescription.
At viscous crude and the big characteristics of water termination tension force, in prescription, add the viscosity-depression agent of various proportionings.
Carrying out steam heat before annotating synergistic agent earlier handles, improve formation temperature, reduce the viscosity of thickened oil in the low moisture oil reservoir, improve the vapor absorption capacity of stratum efficient part, be beneficial to steam and synergistic agent heating viscosity reduction and displacement effect, improve the exploitation effect of handling up efficient part.
Claims (10)
1, a kind of viscous crude steam exploitation synergistic agent is composited by foaming agent, tensio-active agent and alkali, and the weight % ratio of its each component concentration is: foaming agent 10-40, tensio-active agent 5-25, alkali 0-5, all the other are water.
2, a kind of viscous crude steam exploitation synergistic agent according to claim 1 is characterized in that foaming agent can be volatile salt, bicarbonate of ammonia and urea.
3, according to claim 1 or 2 or 2 described a kind of viscous crude steam exploitation synergistic agent, concentration is 10-20% when it is characterized in that foaming agent is volatile salt; Concentration is 10-30% during for bicarbonate of ammonia.
4, a kind of viscous crude steam exploitation synergistic agent according to claim 1, it is characterized in that foaming agent the most frequently used be urea.
5, a kind of viscous crude steam exploitation synergistic agent according to claim 1 is characterized in that alkali can be sodium hydroxide, yellow soda ash, also can be the mixture of sodium hydroxide and yellow soda ash.
6, a kind of according to claim 1 or 5 viscous crude steam exploitation synergistic agent is characterized in that 2 times when concentration when alkali uses yellow soda ash separately is to use the mixture of sodium hydroxide or sodium hydroxide and yellow soda ash; The ratio of mixture of sodium hydroxide and yellow soda ash is 1: 2.
7, a kind of according to claim 1 or 5 viscous crude steam exploitation synergistic agent is characterized in that the most frequently used alkali is sodium hydroxide.
8, a kind of viscous crude steam exploitation synergistic agent according to claim 1, used tensio-active agent can be alkali lignin Sulfonates, phenolic aldehyde polyethers viscosity-depression agent, preferably alkali lignin sulfonate in it is characterized in that preparing.
9, a kind of viscous crude steam exploitation synergistic agent according to claim 1 is characterized in that tensio-active agent can use mahogany acid salt or ether alcohol sulfate class whipping agent, preferably ether alcohol sulfate.
10, a kind of preparation method of viscous crude steam exploitation synergistic agent, its preparation process is:
(1) dissolved hydrogen sodium oxide, yellow soda ash or sodium hydroxide and sodium carbonate mixture;
(2) add tensio-active agent down at 0 ℃～40 ℃ and mix stirring 0.5～1 hour;
(3) adding foaming agent down at 0 ℃～40 ℃ stirred 1～2 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021533377A CN1253648C (en) | 2002-11-29 | 2002-11-29 | Thickened oil steam production synergist and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021533377A CN1253648C (en) | 2002-11-29 | 2002-11-29 | Thickened oil steam production synergist and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1554725A true CN1554725A (en) | 2004-12-15 |
| CN1253648C CN1253648C (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021533377A Expired - Lifetime CN1253648C (en) | 2002-11-29 | 2002-11-29 | Thickened oil steam production synergist and its preparing method |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100497884C (en) * | 2006-12-07 | 2009-06-10 | 西南石油大学 | Method for producing oil by injecting air buffering catalytic oxidation of thick oil |
| CN101323780B (en) * | 2008-08-06 | 2010-06-02 | 西安石油大学 | A low-permeability oilfield thermochemical drainage aid and its application |
| CN101775971A (en) * | 2010-02-03 | 2010-07-14 | 中国石油天然气股份有限公司 | Oil field maximum swept volume chemical flooding oil extraction method |
| CN101839127A (en) * | 2010-04-12 | 2010-09-22 | 北京东方亚洲石油技术服务有限公司 | Exploitation method of thick oil type oil deposit |
| CN102153994A (en) * | 2011-01-30 | 2011-08-17 | 中国石油天然气股份有限公司 | High-temperature miscible phase temporary plugging channeling sealing agent and preparation method thereof |
| CN102162350A (en) * | 2011-03-08 | 2011-08-24 | 东北石油大学 | Method for improving flooding effect of polymer solution by using calcium and magnesium ions in water |
| CN103275687A (en) * | 2013-05-24 | 2013-09-04 | 中国石油天然气股份有限公司 | Thick oil cold recovery agent, preparation method and application thereof |
| CN103289665A (en) * | 2013-05-09 | 2013-09-11 | 中国石油天然气股份有限公司 | Oil displacement composition, multi-element thermal fluid oil displacement composition containing same and displacement method |
| CN106367053A (en) * | 2015-07-21 | 2017-02-01 | 中国石油天然气股份有限公司 | Viscosity reduction composition and application thereof in field of super-heavy oil exploitation |
| CN106437651A (en) * | 2015-08-05 | 2017-02-22 | 中国石油化工股份有限公司 | Aerochemical steam flooding method for increasing recovery rate of heavy oil reservoir |
| CN106545321A (en) * | 2015-09-18 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of method of gravity auxiliary displacement of reservoir oil and its application |
| CN107191167A (en) * | 2017-06-14 | 2017-09-22 | 中国石油天然气股份有限公司 | Method for improving steam assisted gravity drainage development by using urea |
| CN108868721A (en) * | 2018-08-01 | 2018-11-23 | 中国石油天然气股份有限公司 | Method for reducing viscosity of heavy oil huff-puff well by utilizing associated gas after steam flooding desulfurization |
| CN109113700A (en) * | 2018-07-20 | 2019-01-01 | 中国石油天然气股份有限公司 | Multi-medium steam huff-and-puff oil production method for old region of heavy oil reservoir |
| CN110566816A (en) * | 2019-09-25 | 2019-12-13 | 威海翔泽新材料科技有限公司 | preparation method of tar viscosity reducer for reducing viscosity of tar |
| WO2020165572A1 (en) * | 2019-02-12 | 2020-08-20 | Innospec Limited | Treatment of subterranean formations |
| CN113403058A (en) * | 2021-05-27 | 2021-09-17 | 濮阳市万良石油科技发展有限公司 | Synergist and preparation method thereof |
| US11739256B2 (en) | 2019-02-12 | 2023-08-29 | Innospec Limited | Treatment of subterranean formations |
| US11753583B2 (en) | 2019-02-12 | 2023-09-12 | Innospec Limited | Treatment of subterranean formations |
| CN117868767A (en) * | 2024-03-13 | 2024-04-12 | 中国石油大学(华东) | A method for improving heavy oil recovery by using flue gas to form gel |
| US11987751B2 (en) | 2019-02-12 | 2024-05-21 | Innospec Limited | Treatment of subterranean formations |
-
2002
- 2002-11-29 CN CNB021533377A patent/CN1253648C/en not_active Expired - Lifetime
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100497884C (en) * | 2006-12-07 | 2009-06-10 | 西南石油大学 | Method for producing oil by injecting air buffering catalytic oxidation of thick oil |
| CN101323780B (en) * | 2008-08-06 | 2010-06-02 | 西安石油大学 | A low-permeability oilfield thermochemical drainage aid and its application |
| CN101775971B (en) * | 2010-02-03 | 2013-02-20 | 中国石油天然气股份有限公司 | Oil field maximum swept volume chemical flooding oil extraction method |
| CN101775971A (en) * | 2010-02-03 | 2010-07-14 | 中国石油天然气股份有限公司 | Oil field maximum swept volume chemical flooding oil extraction method |
| CN101839127A (en) * | 2010-04-12 | 2010-09-22 | 北京东方亚洲石油技术服务有限公司 | Exploitation method of thick oil type oil deposit |
| CN102153994A (en) * | 2011-01-30 | 2011-08-17 | 中国石油天然气股份有限公司 | High-temperature miscible phase temporary plugging channeling sealing agent and preparation method thereof |
| CN102153994B (en) * | 2011-01-30 | 2013-07-10 | 中国石油天然气股份有限公司 | High-temperature miscible phase temporary plugging channeling sealing agent and preparation method thereof |
| CN102162350A (en) * | 2011-03-08 | 2011-08-24 | 东北石油大学 | Method for improving flooding effect of polymer solution by using calcium and magnesium ions in water |
| CN102162350B (en) * | 2011-03-08 | 2013-04-24 | 东北石油大学 | Method for improving flooding effect of polymer solution by using calcium and magnesium ions in water |
| CN103289665A (en) * | 2013-05-09 | 2013-09-11 | 中国石油天然气股份有限公司 | Oil displacement composition, multi-element thermal fluid oil displacement composition containing same and displacement method |
| CN103289665B (en) * | 2013-05-09 | 2015-09-09 | 中国石油天然气股份有限公司 | Oil displacement composition, multi-element thermal fluid oil displacement composition containing same and displacement method |
| CN103275687A (en) * | 2013-05-24 | 2013-09-04 | 中国石油天然气股份有限公司 | Thick oil cold recovery agent, preparation method and application thereof |
| CN106367053A (en) * | 2015-07-21 | 2017-02-01 | 中国石油天然气股份有限公司 | Viscosity reduction composition and application thereof in field of super-heavy oil exploitation |
| CN106367053B (en) * | 2015-07-21 | 2019-08-02 | 中国石油天然气股份有限公司 | Viscosity reduction composition and application thereof in field of super-heavy oil exploitation |
| CN106437651A (en) * | 2015-08-05 | 2017-02-22 | 中国石油化工股份有限公司 | Aerochemical steam flooding method for increasing recovery rate of heavy oil reservoir |
| CN106545321A (en) * | 2015-09-18 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of method of gravity auxiliary displacement of reservoir oil and its application |
| CN106545321B (en) * | 2015-09-18 | 2019-06-07 | 中国石油化工股份有限公司 | A kind of method and its application of the gravity auxiliary displacement of reservoir oil |
| CN107191167A (en) * | 2017-06-14 | 2017-09-22 | 中国石油天然气股份有限公司 | Method for improving steam assisted gravity drainage development by using urea |
| CN109113700A (en) * | 2018-07-20 | 2019-01-01 | 中国石油天然气股份有限公司 | Multi-medium steam huff-and-puff oil production method for old region of heavy oil reservoir |
| CN108868721A (en) * | 2018-08-01 | 2018-11-23 | 中国石油天然气股份有限公司 | Method for reducing viscosity of heavy oil huff-puff well by utilizing associated gas after steam flooding desulfurization |
| US11987751B2 (en) | 2019-02-12 | 2024-05-21 | Innospec Limited | Treatment of subterranean formations |
| WO2020165572A1 (en) * | 2019-02-12 | 2020-08-20 | Innospec Limited | Treatment of subterranean formations |
| US11739256B2 (en) | 2019-02-12 | 2023-08-29 | Innospec Limited | Treatment of subterranean formations |
| US11753583B2 (en) | 2019-02-12 | 2023-09-12 | Innospec Limited | Treatment of subterranean formations |
| US12060522B2 (en) | 2019-02-12 | 2024-08-13 | Innospec Limited | Treatment of subterranean formations |
| CN110566816A (en) * | 2019-09-25 | 2019-12-13 | 威海翔泽新材料科技有限公司 | preparation method of tar viscosity reducer for reducing viscosity of tar |
| CN113403058A (en) * | 2021-05-27 | 2021-09-17 | 濮阳市万良石油科技发展有限公司 | Synergist and preparation method thereof |
| CN117868767B (en) * | 2024-03-13 | 2024-06-11 | 中国石油大学(华东) | A method for improving heavy oil recovery by using flue gas to form gel |
| CN117868767A (en) * | 2024-03-13 | 2024-04-12 | 中国石油大学(华东) | A method for improving heavy oil recovery by using flue gas to form gel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1253648C (en) | 2006-04-26 |
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