国产精细控压钻井系统在蓬莱9井试验与效果分析

Field test and analysis on effect of auto-controlled pressure drilling system in the well Penglai 9

周英操 杨雄文 方世良 赵庆 肖润德 唐贵

ZHOU Yingcao YANG Xiongwen FANG Shiliang ZHAO Qing XIAO Runde TANG Gui

中国石油集团钻井工程技术研究院，北京　100195 中国石油集团川庆钻探工程有限公司，四川广汉　618300

CNPC Drilling Research Institute, Beijing 100195, China CNPC Chuanqing Drilling Company, Guanghan 618300,China

精细控压钻井是解决窄密度窗口安全钻井问题的新技术之一，其目的是精确控制环空压力剖面，实现井底压力的恒定控制。介绍了自主研发的PCDS-I精细控压钻井系统装备特点、现场试验与应用情况。该系统整体运行稳定、无故障，经受住了现场工况的考验，实现了恒定井底压力控制和微流量控制，钻进过程中，系统回压控制精度达到0.2 MPa，接单根、起下钻过程中，系统回压控制精度达到0.5 MPa。

MPD is a new technology that to resolve the drilling problem of narrow mud weight window, the aim is to precisely control the annulus pressure profile, to achieve a constant bottom-hole pressure. This article describes the development of the PCDS-I Auto-controlled pressure drilling system, equipped with sophisticated features, field tests and application. The overall stable operation, without failure, has withstood the test of site conditions, to achieve a constant well base pressure control, and micro-flow control, into the process system back pressure control accuracy 0.2 MPa, then a single root, from the drilling process control precision of the system back pressure 0.5 MPa.