摘要
岩芯试验和矿场应用发现,微生物可以在多孔介质中生长、运移和繁殖,代谢产生生物聚合物,并进一步形成生物膜。生物聚合物在地层中可以通过条件的改变而形成凝胶;生物膜由于其致密性也可以对高渗透层产生选择性的封堵,调整吸水剖面,提高原油采收率。对生物矿化作用的进一步研究有助于微生物调剖机理的完善和应用。微生物调剖技术以其设备简单、施工简便、经济环保而在提高油田采收率方面得到广泛的应用。
The biopolymer-producing spores can germinate,transport and propagate easily in Berea cores or porous media with permeability of more than 4.935×10 -13 m 2.They can produce polymers,biomass,and slimes.Biofilm is the multilayer growth of cells and support material on solid surfaces,consisting of biopolymer and biomass produced the micro-organisms.Biopolymer can be triggered in situ to form a gel.The processes rely upon injected micro-organisms and nutrients to reduce the permeability of watered-out thief zones or high-permeability streaks by forming a resilient biofilm or gels in the pore space of the reservoir rock.The precipitations caused by biomineralization have an effective plugging when mixed with biomass.It is found that microbial profile modification(MPM) overcomes the shortcomings of the conventional treatments such as polymer gels,squeeze cementing,and selective perforation,whose effects are negated by crossflow in the reservoir.It will be widely used for its low-cost,effectiveness and environmental safety.
出处
《地质科技情报》
CAS
CSCD
北大核心
2005年第2期101-104,共4页
Geological Science and Technology Information
关键词
微生物调剖
选择性封堵
渗透率
生物聚合物
生物膜
生物矿化作用
microbial profile modification(MPM)
selective plugging
permeability
biopolymer
biofilm
biomineralization
