新型钻井液成膜剂的研制及其在埕海油田的应用  

Development of New Film-Forming Agent for Drilling Fluids and Application in Chenghai Oilfield

作　　者：张朔[1] 蒋官澄[1] 郭海涛 汤新国 金海锋 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油大港油田分公司,天津300289

出　　处：《石油钻探技术》2013年第2期44-48,共5页Petroleum Drilling Techniques

基　　金：国家科技重大专项"渤海湾盆地黄骅坳陷滩海开发示范工程"(编号:2011ZX05050);中国国家杰出青年基金项目"多孔介质油气藏气湿性基础理论研究"(编号:50925414);国家自然科学基金面上项目"复杂地层条件下;提高井壁稳定性新方法研究"(编号:51074173)联合资助

摘　　要：为了降低埕海油田钻井过程中外来流体对储层的损害,基于成膜钻井液技术的基本理论,以苯乙烯、丙烯酸丁酯单体为原料,采用乳液聚合的方法,以过硫酸铵为引发剂,合成了新型钻井液成膜剂LCM-8。室内试验表明:埕海油田上部钻井液中加入成膜剂LCM-8后,流变性能能够满足携岩要求;能在岩心污染端形成一个渗透率极低的封堵带,封堵率可达90%以上;返排渗透率恢复率大于90%。新型钻井液成膜剂LCM-8在埕海油田2口井的储层钻进过程中进行了应用,结果表明,上部钻井液加入该成膜剂后,其性能能满足钻井要求,2口井的表皮系数为-2.31和-3.11,而未用该成膜剂2口邻井的表皮系数为-0.27和0.23。这说明,成膜剂LCM-8能满足埕海油田钻井要求,实现钻井过程中的储层保护。In order to reduce the reservoir damage caused by foreign fluid during drilling in Chenghai Oilfield,a new film-forming agent LCM-8 had been developed using styrene,butyl acrylate monomer and trigger ammonium persulfate, by emulsion polymerization method based on the film-forming technology. Laboratory tests showed that rheological properties of the drilling fluid could be gotten to carry cuttings af- ter adding LCM-8, which could form a plugging area with low permeability at the polluted end of the core. The plugging rate and flowback permeability recovery rate could be higher than 90%. LCM-8 had been ap- plied in two wells in Chenghai Oilfield, the results showed that the drilling fluid for the upper well section could meet the drilling demand after adding the film-forming agent,resulting in skin factors of --2.31 and --3.11 respectively,while the skin factors of two adjacent wells were --0. 27 and 0.23 respectively without adding the film forming agent. It showed that LCM-8 could meet the demand of drilling and reservoir pro- tection in Chenghai Oilfield.

关 键 词：钻井液 成膜剂 防止地层损害 封堵 表皮系数 埕海油田 

分 类 号：TE254.4[石油与天然气工程—油气井工程]