Title:
VISCOELASTIC FOAM SYSTEM OF ACID GAS SWITCH, AND METHOD AND USE FOR IMPROVING RECOVERY RATIO BY USING VISCOELASTIC FOAM SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/002048
Kind Code:
A1
Abstract:
Disclosed in the present invention are a viscoelastic foam system of an acid gas switch and a method and use for improving the recovery ratio by using the viscoelastic foam system. The viscoelastic foam system of an acid gas switch of the present invention comprises a pH switch surfactant, a hydrocarbon-based anionic surfactant, and water, wherein the pH switch surfactant is at least one of long-chain hydrocarbon-based amines. When the viscoelastic foam system meets an acid gas, the interaction between the pH switch surfactant and the hydrocarbon-based anionic surfactant is enhanced, the viscosity is increased, and the formed foam has better stability and blocking performance. When 1.0 PV of the viscoelastic foam system is injected, the apparent viscosity of the foam formed in the core is greater than or equal to 270 mPa·s, so that the recovery ratio can be increased by 20% or more, and the long-chain hydrocarbon-based amine improves the salt tolerance of a single anion, thereby increasing the mineralization degree application range of the system to 10-200 g/L.
Inventors:
HE XIUJUAN (CN)
LI YINGCHENG (CN)
QIU JUN (CN)
CUI LEYU (CN)
LI YINGCHENG (CN)
QIU JUN (CN)
CUI LEYU (CN)
Application Number:
PCT/CN2023/102636
Publication Date:
January 04, 2024
Filing Date:
June 27, 2023
Export Citation:
Assignee:
CHINA PETROLEUM & CHEM CORP (CN)
SINOPEC SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECH CO LTD (CN)
SINOPEC SHANGHAI RESEARCH INSTITUTE OF PETROCHEMICAL TECH CO LTD (CN)
International Classes:
C09K8/584; C09K8/58; C09K8/594; E21B43/16
Domestic Patent References:
| WO2015135777A2 | 2015-09-17 |
Foreign References:
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Other References:
ZHANG PANFENG; BAI GUANGYI; CUI GUODONG; ZHANG LIANG; PENG XIYI; PEI SHUFENG; REN SHAORAN: "Enhanced CO2foam based on amide and amine surfactants and synergistically coupled with sodium dodecyl sulfate at high temperature and high pressure", JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING, ELSEVIER, AMSTERDAM,, NL, vol. 179, 1 January 1900 (1900-01-01), NL , pages 266 - 275, XP085704313, ISSN: 0920-4105, DOI: 10.1016/j.petrol.2019.04.070
BA, AIYE: "Research on the Preparation of Salt-tolerant CO2-responsive Foaming and Discharge Agent", ZHONGGUO SHEBEI GONGCHENG - CHINA PLANT ENGINEERING, ZHONGGUO SHEBEI GONGCHENG ZAZHISHE, CN, no. 7, 10 April 2022 (2022-04-10), CN , pages 13 - 14, XP009552080, ISSN: 1671-0711
SUN SHUANGQING; ZHANG XIQIANG; FENG SHENGXIANG; WANG HONGBING; WANG YAN; LUO JIANHUI; LI CHUNLING; HU SONGQING: "CO2/N2 switchable aqueous foam stabilized by SDS/C12A surfactants: Experimental and molecular simulation studies", CHEMICAL ENGINEERING SCIENCE, OXFORD, GB, vol. 209, 9 September 2019 (2019-09-09), GB , XP085839291, ISSN: 0009-2509, DOI: 10.1016/j.ces.2019.115218
BA, AIYE: "Research on the Preparation of Salt-tolerant CO2-responsive Foaming and Discharge Agent", ZHONGGUO SHEBEI GONGCHENG - CHINA PLANT ENGINEERING, ZHONGGUO SHEBEI GONGCHENG ZAZHISHE, CN, no. 7, 10 April 2022 (2022-04-10), CN , pages 13 - 14, XP009552080, ISSN: 1671-0711
SUN SHUANGQING; ZHANG XIQIANG; FENG SHENGXIANG; WANG HONGBING; WANG YAN; LUO JIANHUI; LI CHUNLING; HU SONGQING: "CO2/N2 switchable aqueous foam stabilized by SDS/C12A surfactants: Experimental and molecular simulation studies", CHEMICAL ENGINEERING SCIENCE, OXFORD, GB, vol. 209, 9 September 2019 (2019-09-09), GB , XP085839291, ISSN: 0009-2509, DOI: 10.1016/j.ces.2019.115218
Attorney, Agent or Firm:
CHINA PATENT AGENT (H.K.) LTD. (CN)
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