Self-assembly gel foam oil-displacing agent suitable for high-temperature and high-salt fractured-vuggy reservoir and preparation method thereof

The invention provides a self-assembly gel foam oil-displacing agent suitable for a high-temperature and high-salt fracture-cavity reservoir and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The oil-displacing agent is prepared from the following raw materia...

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Bibliographic Details
Main Authors LI CHENGHAO, HE YINGLAN, TU HONGJUN, GU YUE, LUO HAO, YANG YAN, HE XUEDONG, ZHOU MING, LI YI
Format Patent
LanguageChinese
English
Published 22.08.2023
Subjects
ADHESIVES
CHEMISTRY
DYES
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
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Summary:The invention provides a self-assembly gel foam oil-displacing agent suitable for a high-temperature and high-salt fracture-cavity reservoir and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The oil-displacing agent is prepared from the following raw materials in percentage by weight: 0.2 to 0.5 percent of quaternary amphiphilic hydrophobic association copolymer, 0.2 to 0.3 percent of betaine Gemini surfactant, 0.1 to 0.35 percent of amine oxide surfactant, 0.1 to 0.2 percent of heat-resistant polybasic anhydride, 0.02 to 0.07 percent of counter ion compound, 0.04 to 0.14 percent of chelating agent and the balance of water, the content of inorganic salt in the water is 10 to 22 percent, and the raw materials are prepared into the foam oil-displacing agent by utilizing a foam generator. The stability of foam after foaming is remarkably improved, and the crude oil recovery rate of the high-temperature and high-salt fracture-vuggy reservoir is remarkably improved by impr
Bibliography:Application Number: CN202310476230