摘要
微生物采油机理包括嗜烃降黏、乳化、润湿、产气等,其中微生物润湿机理为微生物及代谢产物通过对储层界面改性实现提高洗油效率和改善原油渗流能力的目的。总结了现阶段中外对微生物及代谢产物在润湿改性中的作用及微观机理研究进展,提出了微生物采油技术在润湿改性方面需要深化研究的问题及发展方向。目前研究证实微生物菌体、代谢产物都具备不同程度的改变岩石表面润湿性的能力,而引起该现象的原因可能是:①微生物代谢产生的生物类表面活性剂通过清洗机理或覆盖机理吸附在岩石表面,从而改变岩石表面的润湿性;②微生物菌体通过生长繁殖在油水或油固界面上形成一层黏弹性的生物膜,进而完成润湿性改变。由于微生物采油机理具有多机理协同作用的复杂性,微生物润湿改性机理在提高采收率中的贡献及油藏适应性等问题尚未明确。因此需要进一步深化微生物及代谢产物润湿改性机理研究,明确其作用范围、稳定性及油藏适应性,为提高微生物采油现场应用效果提供理论支撑。
Microbial oil recovery mechanisms include hydrocarbonophilic viscosity reduction,emulsification,wettability alteration,and gas production.In the microbial wettability mechanism,microorganisms and metabolites modify the reservoir interface to improve oil displacement efficiency and crude oil percolation capacity.The current research progress in the role and micro-mechanism of microorganisms and metabolites in wettability modification was summarized,and the problems and development directions of microbial oil recovery technology,which require in-depth research for wettability modification,were presented.Current studies have confirmed that the microbial cells and metabolites can change the wettability of the rock surface to varying degrees,and the reasons for this phenomenon may be as follows:①The biological surfactant pro⁃duced by microbial metabolism is adsorbed on the rock surface through the cleaning or covering mechanism,thereby chang⁃ing the wettability of the rock surface.②Microbial cells grow and multiply on the oil-water or oil-solid interface to form a viscoelastic biofilm,thereby completing wettability alteration.Due to the complex multi-mechanism synergistic reaction of the microbial oil recovery mechanism,the contribution of the biological wettability mechanism to enhanced oil recovery and the adaptability of oil reservoirs have not yet been clarified.Therefore,it is necessary to deepen the research on the wettabil⁃ity mechanism of microorganisms and metabolites and clarify its scope of action,stability,and reservoir adaptability to pro⁃vide theoretical support for improving the field application of microbial oil recovery.
作者
陈子慧
林军章
汪卫东
汪庐山
CHEN Zihui;LIN Junzhang;WANG Weidong;WANG Lushan(Postdoctoral Work Station of Shengli Oilfield,SINOPEC,Dongying City,Shandong Province,257001,China;Institute of Petroleum Engineering and Technology,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China;Key Laboratory of Microbial Enhanced Oil Recovery,SINOPEC,Dongying City,Shandong Province,257000,China;Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257001,China)
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2022年第4期83-90,共8页
Petroleum Geology and Recovery Efficiency
基金
中国石化胜利石油管理局有限公司博士后项目“微生物驱油藏界面生物改性机制和调控方法研究”(YKB2014)。
关键词
微生物采油技术
提高采收率
润湿改性
机理研究
矿场应用
microbial oil recovery technology
enhanced oil recovery(EOR)
wettability alteration
mechanism research
field application
