一种低油水比低成本油基钻井液性能研究  

Research on the Performance of Oil-based Drilling Fluid with Low Oil-water Ratio and Low Cost

作　　者：韩秀贞[1] 王显光[1] 李舟军[1] 何恕[1] 林永学[1] 

机构地区：[1]中国石化石油工程技术研究院,北京100101

出　　处：《中外能源》2015年第4期67-71,共5页Sino-Global Energy

基　　金：中国石化科技攻关项目"页岩气藏水平井油基钻井液技术研究"(项目编号:P11053)部分成果

摘　　要：油基钻井液具有抗高温、抗盐钙侵、润滑性好、利于井壁稳定以及对油气层损害程度小等突出优点，已成为钻探高难度水平井、大斜度定向井、高温深井和复杂地层的首选体系。目前国内现场使用的油基钻井液的油水比普遍较高、处理剂加量大，成本难以有效降低。针对油田开发降低成本的迫切需求，研制了一套低油水比、低成本的油基钻井液体系。通过对乳化剂、有机土和降滤失剂进行评价，确定了其加量，并通过优化，最终确定了低油水比钻井液配方：0号柴油＋1．0％-2．5％有机土＋2．0％～3．5％乳化剂＋3．0％～4．0％降滤失剂＋CaCl2水溶液（25％的CaCl2）＋2．0％的CaO＋重晶石，油水比为70：30—60：40，乳化剂加量仅为2．0％～3．5％，抗温能力可达170℃，密度可控制在1．0-2．0g，cm3之间。该低油水比钻井液体系具有较好的抗污染能力、流变性能和极低的滤失量，不仅可满足现场钻井施工的技术要求，而且大幅度降低了油基钻井液的成本。应用前景良好。Oil-based drilling fluid has the advantages of high temperature resistance, salt and calcium erosion resistance,good lubricity,being good for stable sidewall,giving protection for reservoirs and so on.It has be- come the preferred system for drilling in the high-difficulty horizontal well,high angle deviated hole,high- temperature deep well and complex formations.At present,the cost of domestic oil-based drilling fluid is generally high for high oil-water ratio and more additive dosage.In order to meet the urgent demand of low cost in the oilfield development,a new oil-based drilling fluid system with low oil-water ratio and low cost was developed.Mter the dosage of emulsifier,organic clay and filtrate reducer was evaluated and optimized, the formulation of the oil-based drilling fluid was established.It has been optimized as 0#diesel oil＋l.0%- 2.5%organic clay＋2.0%-3.5% emulsifier＋3.0%-4.0%fihrate reducer＋25% CaC12 water solution＋2.0% CaO＋ baroselenite with oil-water ratio of 70：30 to 60：40.The system has a small dosage of the emulsifier and high-temperature resistance of 170℃.Its density may be controlled among 1.0 to excellent anti-pollution ability operation requirements of field ,good rheological property and lower filter loss.It has drilling and much lower cost. 2.0g/cm3.The good prospect system has for meeting

关 键 词：油基钻井液 油水比 抗温性能 流变性能 密度 

分 类 号：TE254[石油与天然气工程—油气井工程]