钻井液与水泥浆化学不兼容原因初探  

Research of Chemical Contamination between Drilling Fluids and Slurry

作　　者：马勇[1] 郭小阳[2] 姚坤全[3] 唐庚[1] 丛长江 

机构地区：[1]西南油气田公司采气工程研究院 [2]"油气藏地质及开发工程"国家重点实验室.西南石油大学 [3]西南油气田公司工程技术与监督部 [4]渤海钻探塔里木钻井分公司

出　　处：《钻井液与完井液》2010年第6期46-48,共3页Drilling Fluid & Completion Fluid

摘　　要：钻井液和水泥浆化学兼容性差不但影响顶替效率,而且危及固井作业安全,这是导致深井超深井固井质量低下的重要原因和引发固井工程事故的隐患。为了探索钻井液对水泥浆产生化学污染的本质,以川渝油气田某区块一口典型井的φ177.8mm尾管固井作业为例,采用单因素分析法,将该井采用的钻井液处理剂与现场水泥浆进行污染稠化实验。实验研究表明:钻井液污染水泥浆的主要原因是钻井液中某些处理剂与水泥浆外加剂之间相互作用,引发凝胶效应,导致浆体稠度迅速增大和稠化时间大幅度缩短,并非水泥浆真正凝结硬化。As the main cause of poor cementing quality and cementing engineering accidents,the poor chemical compatibility of drilling fluids and slurries,which has bad effects on displacement efficiency and cementing job,is a ubiquitous problem.Taking φ177.8 mm liner cementing of one typical well in Chuanyu oil and gas field as example,thickening time test is done to analysis the chemical contamination of cement slurries when in contact with drilling fluid.Laboratory research shows that the interaction between drilling fluid additives and slurry additives is the essential factor of gel action which relates to increase of consistency and decrease of thickening time of slurry.

关 键 词：钻井液 水泥浆 化学污染 固井 污染稠化 相互作用 凝胶效应 

分 类 号：TE256.9[石油与天然气工程—油气井工程]