Preparation of hydrophobic nano calcium carbonate and its application in EOR

Abstract W/O emulsification flooding is a new type of oil displacement method, which can effectively improve oil recovery, but there are few materials used for W/O emulsification at present. Therefore, we prepared a hydrophobic nano calcium carbonate (WS-Ca) and compounded it with Span80 to form a n...

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Bibliographic Details
Published inIOP conference series. Earth and environmental science Vol. 1152; no. 1; pp. 12012 - 12019
Main Authors Kaiping, Tian, Wanfen, Pu, Siying, Li, Hongzhou, Wang, Wei, He, Minghong, Xia
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2023
Subjects
Calcium carbonate
Calcium compounds
Contact angle
Crude oil
Displacement
Emulsification
Enhanced oil recovery
Hydrophobicity
Lipophilic
Oil
Oil recovery
Surface tension
Viscosity
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Summary:Abstract W/O emulsification flooding is a new type of oil displacement method, which can effectively improve oil recovery, but there are few materials used for W/O emulsification at present. Therefore, we prepared a hydrophobic nano calcium carbonate (WS-Ca) and compounded it with Span80 to form a nano oil displacement system. The contact angle experiment demonstrates that WS-Ca is lipophilic material. After testing the emulsification performance, viscosity, interfacial tension and oil displacement performance of the oil displacement system, it is found that the nano oil displacement system with the best performance is WS-Ca (800ppm) +Span80 (1%), and the displacement system and oil are emulsified into W/O emulsion, and the viscosity of emulsion is 25 times that of crude oil. Furthermore, the oil displacement system can successfully lower the oil-water interfacial tension and increase the oil recovery of injection water to 62.63%.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/1152/1/012012