平湖油气田钻杆刺漏现象研究

Research on drill pipe damaged in Pinghu field

阐述平湖油气田钻井作业中钻具刺漏现象研究过程及其结论。 1998年以来 ,平湖油气田钻井作业中连续出现钻杆刺漏现象。有关部门组织了跨系统、多学科、多专业的科研合作 ,先后有5个学科、2 4个专业、近 2 0所大专院校和科研院所、8个油田的专家参与了研究工作 ,并先后在 5个城市进行了 11项正规的系列试验 ,写出了 13部正式试验报告和调研报告。研究中使用了我国独具知识产权的 3项专利技术。当今现代化大型工程中出现的机具损坏、腐蚀问题 ,常常是综合原因作用的结果 ,需要从相关的各个学科进行认真的研究。在对钻具刺漏现象的大量试验和研究中 ,意外地发现并证实平湖油气田地层内存在少量的H2 S气体 ,这为全面认识平湖油气田地层状况 ,正确确定有关装备的防腐蚀等级 ,以及预测生产装备的使用寿命 ,提供了重要的决策依据。

A lot of drill pipes have been damaged or corroded during drilling in Pinghu oil and gas field offshore China since 1997.The paper introduces the procedure and results of research on the damaged drill pipes. Such damage is called by engineers of rig site as cut through of the pipe by drilling fluid.The multidisciplinary research was organized by related departments and participated by many experts and professors from almost 20 universities and institutes as well as engineers from 8 oil fields,involving 5 disciplines and 24 specialities.They did 11 tests in 5 cities and wrote 13 reports to find the cause resulting in the damage of drill pipe.3 patent technologies of China had been used in the research.It has been recognized that anti_corrosion is an integrated engineering and needs the cooperation of multidiscipline.The research found that very little H 2S exits in the formation of Pinghu oil and gas field,which has provided the basis to fully understand the reservoir of the field, determine anti_corrosion level of related equipment and tools, and accurately predict the life of production equipment in the future.