粘土在高温高盐油藏封堵大孔道的应用研究  

Application Study on Clay Plugging Large Pore Paths in High Temperature and High Salinity Reservoir

作　　者：韩易龙[1] 纪文娟[2] 赵光[2] 沈建新[1] 张志武 秦涛[4] 戴彩丽[2] 

机构地区：[1]新疆塔里木油田公司开发事业部 [2]中国石油大学重质油国家重点实验室 [3]大庆塔木察格有限责任公司 [4]中原油田分公司采油工程技术研究院

出　　处：《石油与天然气化工》2011年第2期170-174,100,共5页Chemical engineering of oil & gas

基　　金：山东省杰出青年基金(项目编号JQ201013);中国石油大学(华东)研究生创新基金资助项目(S10-05)

摘　　要：针对高温、高盐油藏地层条件，选用耐温耐盐的粘土体系封堵大孔道。激光粒度仪分析了稳定化钠土的粒径，析水指数法考察了稳定化钠土的分散能力。研究表明，稳定化钠土分散性能好，其粒径不均匀，适合的渗透率范围在3μm^2～20μm^2，注入性试验验证了此结果。同时，研究了四种稳定化钠土的封堵体系的封堵能力，主要包括粘土分散体系、粘土-超细水泥固化体系、粘土-AM—AMPS共聚物、粘土-酚醛树脂冻胶体系，稳定化钠土-超细水泥固化体系于2009年在孤岛油田现场应用2井次，取得了较好的增油效果。Aiming at high temperature and high salinity reservoir, clay is optimized to plug large pore paths. Particle size distribution of stabilizing Na—bentonite is characterized by laser particle analyzer and dispersity by the method of bleeding index. The results show that stabilizing Na—bentonite has good behavior of dispersity.However, it is nonuniform in size, and the adaptive permeability is in a range from 3 to 20tum2, which is proved by injectivity test. Plugging ability and plugging mechanism of clay plugging system are studied, including clay dispersion system, curing system of clay and super—fine cement, floeculation system of clay—AM—AMPS and clay—phenolicresin gel. Curing system of stabilizing Na—bentonite and super—fine cement was successfully applied to two wells in Gudao oilfield in 2009 and achieved good effects.

关 键 词：高温高盐 大孔道 调剖 稳定化钠土 

分 类 号：TE358[石油与天然气工程—油气田开发工程]