钻井液浸泡时间对返排效果的影响模拟研究  

EXPERIMENTAL STUDY ON INFLUENCE OF SOAKING TIME IN DRILL-IN FLUIDS FILTRATE ON RETURN EFFECTIVENESS OF RESERVOIRS

作　　者：赵峰[1] 唐洪明[1,2] 王生奎[3] 邱小骥 王健 

机构地区：[1]西南石油大学资源与环境学院,四川成都610500 [2]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610500 [3]中国石化国际勘探开发有限公司阿尔及利亚分公司,北京海淀100083 [4]中国石油川庆钻探工程公司地球物理勘探公司,四川成都610200

出　　处：《西南石油大学学报（自然科学版）》2011年第5期126-130,199-200,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家重大专项子课题(2008ZX05024-003-04)

摘　　要：室内钻井液动态损害评价实验往往在较短时间内完成,与现场实际钻井过程不符。利用高温高压动态损害评价仪,模拟现场实际钻井过程,将被钻井液损害后的岩芯浸泡在钻井液滤液中一定时间后取出返排,评价不同浸泡时间对返排效果的影响程度。实验结果表明:随着钻井液滤液浸泡时间的增加,油基钻井液体系的返排恢复率变化不大,水基聚合醇体系的返排恢复率有下降的趋势;短时间浸泡时变化不大,长时间浸泡后返排效果明显变差;无固相体系的总体趋势是增加的。钻井液滤液浸泡时间对返排效果的影响主要与钻井液性质、储层特征、储层损害机理等因素有关。The dynamic damage experiment of drill-in fluids in the laboratory is often completed in a short time,which does not correspond with actual drilling process.The article utilizes HTHP dynamic evaluation instrumentto simulate the actual drilling process.We soak the core which is damaged by drill-in fluids into drill-in fluidfiltrate for certain time,and bring it out to evaluate the affecting degree of different soaking time on reservoir returneffectiveness.The experimental results show that,with the increasing of soaking time in the dill-in fluids filtrate,thereturn effectiveness of oil-based drill-in fluid have few variation,and the return effectiveness of polymeric alcoholdrill-in fluid trend to decline;there is few variation in the process of soaking in a short time.On the contrast,thereturn effectiveness tends to decrease after a long time,and clay-free drill-in fluid trend to decrease.The influenceof soaking time in drill-in fluids filtrate on return effectiveness is relative to the characteristic of drill-in fluids,reservoir characteristics,reservoir damage mechanisms and etc.

关 键 词：储层保护 钻井液 浸泡时间 返排效果 储层伤害 

分 类 号：TE254[石油与天然气工程—油气井工程] P634.6[天文地球—地质矿产勘探]