Laboratory Test of Microbial Chemical Compound Flooding to Enhance Recovery Efficiency of High Condensate Oil Reservoirs

doi:10.3969/j.issn.1006-6535.2023.01.012

Abstract

Abstract: In view of the problems of high condensate oil reservoir, cold damage caused by wax precipitation and low recovery efficiency by water flooding, were the microbial high throughput sequencing analysis and experimental evaluation method for chemical flooding and used the core physical simulation and CT scanning and other means to propose the enhanced high pour-point oil recovery technology through microbial + chemical compound flooding combination and research the microbial-chemical compound flooding formula. The system has the advantages of chemical flooding greatly improving the oil displacement efficiency and microbe reducing the waxy composition of crude oil. Finally, the slug combination of microbial and chemical flooding formula is optimized by physical model experiment. The experimental result shows that: The microbial + chemical compound flooding can improve the oil displacement efficiency by 35.19% than the water flooding, and if compared with the single chemical compound flooding, it can improve the oil displacement efficiency by 7.27%, and the oil increment increases by1.16 t/t. This research provides an effective replacement technology for the mode conversion and enhanced oil recovery in the late development stage of high condensate oil reservoir.

Key words: Microbial, chemical compound flooding, enhanced oil recovery, high condensate oil, Block S84-A12

CLC Number:

TE311

Wen Jing, Xiao Chuanmin, Guo Fei, Yang Can, Ma Jing, Li Xiaofeng, Yi Wenbo. Laboratory Test of Microbial Chemical Compound Flooding to Enhance Recovery Efficiency of High Condensate Oil Reservoirs[J]. Special Oil & Gas Reservoirs, 2023, 30(1): 87-92.

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