宝力格油田微生物驱物理模拟实验研究　　

Experimental study of microbial flooding physical simulation for Baolige oilfield

李勇斌 于立新 张黎黎 段丽莎 吴景春 王启波

LI Yongbin YU Lixin ZHANG Lili DUAN Lisha WU Jingchun WANG Qibo

华北油田公司采油工程研究院，河北任丘　062552 华北油田公司勘探开发研究院，河北任丘　062552 东北石油大学提高采收率教育部重点实验室，黑龙江大庆　163318 华北油田公司第四采油厂，河北廊坊　065000

Petroleum Production Engineering Research Institute, Huabei Oilfield Company, Renqiu 062552, China Geologic Exploration and Development Research Institute, Huabei Oilfield Company, Renqiu 062552, China Key Laboratory of Enhanced Oil and Gas Recovery of Education Ministry, Northeast Petroleum University, Daqing163318, China NO.4 Production Plant, Huabei Oilfield Company, Langfang 065000, China

针对宝力格油田微生物驱过程中存在的问题，通过室内物理模拟实验对不同驱替介质提高采收率的作用、产出细菌浓度与注入细菌浓度的关系以及营养液浓度对维持产出液细菌浓度的影响进行了深入研究。结果表明，通过注入1%的菌液及营养液进行微生物驱时可提高采收率16.77%，当产出液经补充营养液及菌液并发酵10~12 h后再继续进行微生物连续驱时可进一步提高采收率5.74%，产出液细菌浓度达到108个/mL以上。但由于岩心对菌体的吸附作用以及岩心渗透率对微生物运移的影响，产出液细菌浓度始终要低于注入细菌浓度一个数量级以上。采用产出液回注并补充0.25%以上的营养液时，可使产出液细菌浓度维持在107个/mL以上。研究结果可为现场注入方案设计提供技术支持。

Aiming at the issues in microbial flooding process of Baolige oilfield, the following points were deeply studied in this paper indoor physical simulation experiments, the effect of different flooding ways on enhance oil recovery, the relationship between output bacterial concentration and injected bacteria concentration and influence of nutrient solution concentration on maintaining the produced fluid concentration of bacteria. The results showed that the microbial flooding by injecting 1% bacterial fluid plus 1% nutrient solution can enhance 16.77% oil recovery. And the produced fluid can further enhance oil recovery by 5.74% when supplemented nutrient solution bacterial fluid and ferment about 10-12h before keep on microbial continuous flooding, and the produced fluid bacteria concentration can reach 108 cells / mL or more. However, due to the adsorption of cell core on microbial and the core permeability effect on microbial migration, the concentration of produced bacteria fluids was always one order of magnitude lower than the concentration of injected bacteria fluids. Using the produced fluids reinjection added above 0.25% nutrient solution, the concentration of produced bacteria fluids can be maintained at 107 cells/mL or more. The results can provide technical support for on-site inject program design.