新型KCl/硅酸钠钻井液在强水化分散泥页岩中的应用  

Applications of a Novel KCL/Sodium Silicate Drilling Fluid in Swelling-Prone Formations

作　　者：艾中华[1] 郭健康[1] 唐德钊 

机构地区：[1]中国石化国际石油勘探开发有限公司,北京100083 [2]中国石油集团长城钻探工程有限公司,北京100101

出　　处：《石油钻探技术》2009年第5期77-80,共4页Petroleum Drilling Techniques

摘　　要：井壁稳定一直是影响钻井进度的重要因素。长期以来,油基钻井液一直是解决井壁稳定问题的首选,但因其成本高、环保性差而被成本更低、环保性更好的硅酸盐钻井液所替代。针对苏丹南部油田强水化分散的泥页岩地层,研制出了一种新型KCl/硅酸钠钻井液,该钻井液克服了传统的硅酸盐钻井液流变性控制困难、滤失量偏高等缺点,其防塌性能也明显优于原来在该油田使用的KCl/聚合物钻井液。现场应用表明,该钻井液具有流变性易调、滤失量可控、配制维护简便等特点,使井下复杂情况大大减少,取得了很好的稳定井壁效果,值得其他地区钻进强水化分散地层时借鉴。The well bore stability is one of the key factors affecting the drilling progress, and oil-based mud was the primary option for solving the problem. With higher cost and poor environmental protection, oil-based mud is replaced by the sodium silicate drilling mud. In southern oilfield of Sudan, the shale formation is easy to hydrate. The application of the novel KCL/sodium silicate drilling fluid show that it is easy to adjust the theological properties, control its filter loss, maintain the wellbore stability and reduce the downhole problems.

关 键 词：水基钻井液 硅酸盐钻井液 流变性 井眼稳定 降滤失剂 

分 类 号：TE254.3[石油与天然气工程—油气井工程]