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Solution Properties and Displacement Characteristics of in situ CO 2 Foam System for Enhanced Oil Recovery
Author(s) -
Jin Fayang,
Du Daijun,
Pu Wanfen,
Wang Song
Publication year - 2019
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1002/jsde.12319
Subject(s) - enhanced oil recovery , dissolution , in situ , chemistry , surface tension , spark plug , viscous fingering , carbon dioxide , petroleum engineering , displacement (psychology) , oil production , chemical engineering , pulp and paper industry , geology , mechanical engineering , psychology , physics , organic chemistry , porous medium , porosity , engineering , psychotherapist , quantum mechanics
Carbon dioxide (CO 2 ) foam flooding has been shown to enhance oil recovery. However, large‐scale adoption has been restricted by issues with transportation of CO 2 and equipment corrosion. In situ CO 2 foam generation can possibly overcome these issues. In this article, a CO 2 sustained‐release system was first optimized for the CO 2 production rate and production efficiency. Then, the dissolution capacity and plug‐removing ability of the sustained‐release system were evaluated. Visual experiment and parallel sand pack flooding tests were conducted to verify the formation, propagation of in situ CO 2 foam, and the feasibility of this technique. The results indicated that the sustained‐release system had benign ability to lower injection pressure and improve injectability. Moreover, in situ CO 2 foam flooding could obtain high oil recovery due to favorable mobility control ability, interfacial tension reduction capacity, and heterogeneity improvement. All the experiments demonstrated that the in situ CO 2 foam technique has great potential for enhanced oil recovery in the Bohai oilfield.