微生物产表面活性剂降压增注提高采收率实验研究
Study on Enhanced Oil Recovery by Depressurization and Injection of Microbial Surfactant
仵改 1汪昌尧 1李键 1杜敏 1樊欣欣1
作者信息
- 1. 延长油田股份有限公司,陕西 延安 716000
- 折叠
摘要
针对低渗油田注水井压力高、配注不达标、注水开发效果差等问题,在研究分析储层特征、油藏条件、地面配套的基础上,从原油样品中优选能产生高效生物表面活性剂的菌株Bhj-04.通过室内毛细管驱替实验、岩石润湿性测试、油水乳化现象对比、原油沾附效果评价、岩心驱替模拟实验分析该高效微生物产表面活性剂的性能.实验表明:此菌株产高效表面活性剂具有良好的润湿反转性,经菌剂液体浸泡的岩石样品表面润湿性转变为亲水性能,能有效降低油水界面张力防止水锁导致的储层伤害;岩心驱替实验中加入菌液后能有效提高岩心驱替过程采收率6％,注水井压力降落32.9％.效果明显,研究成果可对低渗油田降压增注提高采收率提供参考意义.
Abstract
In view of the problems of high-pressure water injection well,substandard injection and poor development effect of water injection in low permeability oilfield,on the basis of research and analysis of reservoir characteristics,reservoir conditions and surface matching,strain BHJ-04 with high Surfactant yield was selected from crude oil samples.The performance of the highly efficient microbial surfactant was analyzed by laboratory capillary flooding experiments,rock wettability tests,oil-water emulsification comparison,oil adhesion evaluation and core flooding simulation experiments.The results showed that the strain had good surfactant reversal,and the surface wettability of the rock sample soaked in the liquid changed to hydrophilicity,it can effectively reduce the oil-water interface tension and prevent the reservoir damage caused by water lock,and can effectively improve the recovery factor of core displacement process by 6％and the pressure drop of water injection well by 32.9％.The effect is obvious,and the research results can provide reference significance for enhancing oil recovery by depressurization and injec-tion in low permeability oilfield.
关键词
降压增注/表面活性剂/微生物/提高采收率Key words
Step-down Booster/Surfactant/Microorganisms/Enhanced Oil Recovery引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据