油藏微生物生长与繁殖对多孔介质渗透率的影响  

Impacts of in situ microorganism growth and multiplication on permeability in porous medium

作　　者：程海鹰[1] 王冷[1] 张津[1] 张仁勇[1] 

机构地区：[1]中油大港油田分公司,天津大港300280

出　　处：《特种油气藏》2010年第2期98-100,共3页Special Oil & Gas Reservoirs

基　　金："十五"国家科技攻关项目"中国大中型油田勘探开发关键技术研究"子课题"极端微生物石油开采技术研究"(2003BA613A-08)

摘　　要：开展不同渗透率岩心的驱替实验,研究了注入营养物刺激内源微生物生长与繁殖对多孔介质渗透率的影响规律,确定了微生物的细胞聚集体产生有效封堵的渗透率范围,讨论了利用内源微生物细胞聚集体封堵对提高非均质油藏采收率的作用机理以及条件。实验得出,在较低渗透率(小于350×10-3μm2)岩心中,微生物生长可使渗透率降低80%以上,形成较为稳定的深度封堵;而较高渗透率岩心中则不能。By conducting displacement experiments with cores of different permeability,this paper investigates the impact process of indigenous microorganism growth and multiplication stimulated by injecting nutrient on permeability in porous medium,determines the permeability range of effective plugging formed by microorganism cell aggregates,and discusses the mechanism and conditions of improving recovery factor of heterogeneous reservoir by cell aggregates plugging. The experiments indicate that microorganism growth can reduce permeability by more than 80% and form stable in-depth plugging in cores with permeability less than 350×10-3μm2,while this is not the case in cores of higher permeability.

关 键 词：岩心 微生物生长 渗透率 封堵 稳定性 

分 类 号：TE357.9[石油与天然气工程—油气田开发工程]