钻探工程2025，Vol.52Issue(2)：51-58,8.DOI:10.12143/j.ztgc.2025.02.007
承德宽城坳陷重点地区页岩油气资源调查井冲洗液技术研究
Research on flushing fluid technology for shale oil and gas resources survey well in key areas of Kuancheng Depression in Chengde
摘要
Abstract
The Well Jichengye-1 is located in Chengde City,Hebei Province,which is a small-diameter shale oil and gas survey well,with a structural location in the Lujiagou syncline of the Kuancheng Depression in the Yanliao Rift Trough of the Chengde Basin.The geological condition of the drilling project is extremely complex,with not only water inflow and leakage problems,but also loose and fragmented carbon powder sandy shale in the Hongshuizhuang Formation of the target layer,high montmorillonite content in the clay mineral composition,strong water sensitivity,and poor wellbore stability.Drilling construction poses risks of collapse,leakage,and drill sticking,which puts high demands on drilling technology and flushing fluid technology.In view of this,a detailed analysis was conducted on the performance requirements of each well section for the flushing fluid in the encountered strata.A dedicated flushing fluid system for Well Jichengye-1 was developed and formulated.Orthogonal experiments were conducted on the flushing fluid ratio for the target shale layer,and the flushing fluid formula was determined as follows:water+3%Na-B+3%(soil weight)Na2CO3+3%KHM+1%GPC+0.2%K-PAM+0.2%Na-CMC+1.5%MSDS.Tailored flushing fluid maintenance measures were carried out,which has good application results in the actual drilling process,and can provide reference for similar drilling projects.关键词
页岩油气/小口径调查井/水敏地层/破碎地层/冲洗液技术Key words
shale oil and gas/small-diameter oil and gas survey well/water-sensitive formation/broken strata/flushing fluid technology分类
天文与地球科学引用本文复制引用
刘凤双,鲁建军,李佳伟,王书晴,王建宇,喇瑶瑶,王皓,尹飞,李泽群,王硕,丁战勋,李运鹏,张帅,孙红举..承德宽城坳陷重点地区页岩油气资源调查井冲洗液技术研究[J].钻探工程,2025,52(2):51-58,8.基金项目
中国地质调查局地质调查项目"东部地区战略性矿产靶区查证技术支撑"(编号:DD20240012) （编号:DD20240012）
