渤海钻井防漏堵漏技术研究

Research on Leak Prevention and Sealing Technology for Bohai Drilling

渤海油田深井在钻井过程中钻遇断层、破裂带及火成岩时多次发生失返性漏失,处理难度大、耗时长,增加井控风险的同时影响作业时效。井漏已成为制约钻井作业安全、效率和成本管控的主要问题。本文针对作业风险点,制定了“钻前避漏-钻中防漏-高效堵漏”的作业思路,通过在技术和管理两方面突破,在深层井成功应用,形成了一套渤海油田深层井防漏堵漏的推荐做法。

During the drilling process of deep wells in Bohai Oilfield,there are multiple occurrences of lost circulation and leakage when encountering faults,fractured zones,and igneous rocks,which is difficult and timeconsuming to handle.This increases the risk of well control and affects the efficiency of operations.Leakage has become a major issue that restricts the safety,efficiency,and cost control of drilling operations.This article has developed a work concept of "pre drilling leak prevention,mid drilling leak prevention,and efficient plugging" for job risk points.Through breakthroughs in technology and management,it has been successfully applied in deep wells,forming a set of recommended practices for leak prevention and plugging in deep wells of Bohai Oilfield.