复杂地层低密度钻井液研究与应用  

Research and application of low-density drilling fluid for complex formation

作　　者：董洪栋 朱金勇[1] 陈礼仪[1] 吴金生[2] 刘洪波 DONG Hongdong;ZHU jinyong;CHEN Liyi;WU Jinsheng;LIU Hongbo(State Key Laboratory of Geo-hazard Prevention and Geo-environment protection, Chengdu University of Technology,Chengdu 610059, China;The Institute of Exploration Technology, CAGS, Chengdu 611734, China;Sichuan Province Jinhe Geology and Exploration Engineering Company, Chengdu 610021, China)

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]中国地质科学院探矿工艺研究所,四川成都611734 [3]四川省金核地质勘查工程有限公司,四川成都610021

出　　处：《煤田地质与勘探》2017年第1期168-172,共5页Coal Geology & Exploration

基　　金：国家自然科学基金项目(41272331);地质灾害防治与地质环境保护国家重点实验室项目(SKLGP2012Z007);中国地质调查局地质调查项目(12120113017200)~~

摘　　要：针对资源开发过程中复杂地层钻探易发生压裂性漏失的问题,优选出适当类型的空心玻璃微珠,对空心玻璃微珠性能进行评价,并从分散稳定性、密度、流变性和滤失性等方面测试其对钻井液性能的影响。通过实验进一步优化得到一种以空心玻璃微珠为减轻剂的低密度钻井液体系,该钻井液具有良好的流变性和滤失性能,分散稳定性极佳。将研发的低密度钻井液体系应用于若尔盖矿区2K12-钻孔,结果表明其适用性良好,有效防止了复杂地层漏失问题的发生。An appropriate type of hollow glass microspheres was selected aiming at dealing with the leakage causedby high pressure of drilling fluid and its impact on the performance of the drilling fluid.The performance of hollowglass microspheres was evaluated,and its impact on the performance of the drilling fluid was tested from the aspectsof dispersion stability,density,rheology and fluid loss and so on.A low-density drilling fluid system was optimizedthrough a series of experiment with hollow glass microspheres used as the reducing agent.The drillingfluid system was proved to be of good rheology and filtration properties,excellent dispersion stability.The newdrilling fluid system was applied in the complex formation of Ruoergai and it turned out to be of good applicabilityas the formation leakage was effectively prevented.

关 键 词：空心玻璃微珠 低密度钻井液 复杂地层 漏失 

分 类 号：TE254[石油与天然气工程—油气井工程]