一种复合钾盐聚合物钻井液的研究及应用  

Study on a composite potassium salt polymer drilling fluid and its application in Fushun block,Sichuan

作　　者：张小平[1] 王京光[1] 王勇强[1] 刘伟[1] 曹辉[1] 赵海峰[1] 吴满祥[1] 

机构地区：[1]川庆钻探工程有限公司钻采工程技术研究院长庆分院钻井液所低渗透油气田勘探开发国家工程实验室,陕西西安710018

出　　处：《西安石油大学学报（自然科学版）》2014年第5期89-92,9,共4页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：中国石油天然气集团公司科技项目"西部大庆建设长庆钻完井整体提速及压裂一体化技术研究与现场试验"(编号:2013T-0105-001)

摘　　要：在四川富顺区块页岩钻探过程中使用水基钻井液井段存在地层造浆、泥页岩大量剥落、井壁失稳、严重井漏、上部地层出水、起下钻困难、卡钻等难题。针对以上问题对钻井液存在的技术难点进行分析,对使用的钾盐聚合物钻井液体系进行优化,对体系的基本性能进行了评价。优化后的体系采用优选的复合钾盐配方作为核心抑制剂,具有抑制性强、抗温性好、抗污染能力强等特点,在四川富顺区块的页岩气钻探中取得了良好的应用效果。Fushun block in Sichuan is rich in shale gas,but in drilling sections using water-based drilling fluid,there are some serious problems such as strong formation mud-making,a lot of shale spalling,borehole instability,serious lost circulation,water breakthrough from upper formation,difficult tripping and sticking. For solving the above problems,the used potassium salt polymer drilling fluid system is optimized,and the basic performance of the optimized potassium salt polymer drilling fluid system is evaluated. It is shown that the composite potassium salt polymer drilling fluid system has the advantages of strong inhibitory,good high-temperature resistance and anti-pollution ability,and it can meet the drilling requirements in this block. The application of the drilling system in Fushun block achieves to good result.

关 键 词：页岩 钻井液 复合钾盐聚合物钻井液 坍塌抑制性 抗污染性能 

分 类 号：TE254[石油与天然气工程—油气井工程]