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In order to meet the requirements of air foam flooding in Dagang Gangdong Oilfield, two kinds of foaming agents, GFPA-1 and GFPA-2, were prepared by sulfonation, neutralization and high-temperature hydrolysis of α-olefins with different carbon chain lengths in the laboratory. The test results of foaming agents for its properties showed that when the concentration of foaming agent was over 0.5%, the initial foaming volumes of the two foaming agent systems were more than 500mL, and the foam half-life of GFPA-2 was about 3.5 hours, obviously longer than that of GFPA-1. Therefore, GFPA-2 was selected as the foaming agent for air foam flooding. The experimental results of static adsorption, plugging and core displacement performance of GFPA-2 foaming agent showed that the initial foaming volume of GFPA-2 foaming agent could still maintain 500mL after 48 hours of adsorption at a concentration of 0.5%, and when the ratio of gas to liquid was 1: 1, the resistance factor was more than 50. When a 0.4% foaming agent was injected with 0.35 PV slug, the displacement efficiency of air foaming flooding was 17.4% higher than that of water flooding.References
Youwei J, Yitang Z, Shang Qi L, et al. Displacement mechanisms of air injection in low permeability reservoirs. Petroleum Exploration and Development 2010; 37(4): 471- 476. https://doi.org/10.1016/S1876-3804(10)60048-1
Yuan X, Chengjun W, Shaojing J, et al. Preliminary analysis on explosion limits of EOR by air-foam flooding. Unconventonal Oil & Gas 2015; 2(2): 44-47.
Jun H. Field application of air flooding in light oil reservoirs. Petrochemical Industry Application 2013; 32(4): 26-29.
Shenglai Y, Hao C, Jilei F, et al. A brief discussion on some scientific issues to improve oil displacement during gas injection, Tarim oilfield. Petroleum Geology and Recovery Efficiency 2014; 21(1): 40-44.
Huaijun Y, Yajun D, Lin S, et al. Research on temperature resist air foam system for flooding. Journal of Southwest Petroleum University: Science & Technology Edition 2012; 34(5): 93-98.
Guo DH, Xin HC, Sun JF, Cui XD, Zheng XB. Chinese Patent 2012101528805.
Lei Z, Youdan D. Analysis of surfactants and auxiliaries. Hangzhou: Zhejiang Science and Technology Press 1991; 94-115.
Chengming Z. Oil displaced effects by the alternating injection of N2 foaming system with the high-plugging/high oil-washing in GAOTAIZI reservoirs. Petroleum Geology and Oilfield Development in Daqing 2018; 37(5): 109-112.
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