控压钻井气侵早期监控方法及其应用  

The method of early gas influx detection and control while managed pressure drilling and its application

作　　者：周号博[1] 牛新明[1] 王果[1] 范红康[1] 高立攀 ZHOU Haobo;NIU Xinming;WANG Guo;FAN Hongkang;GAO Lipan(SINOPEC Research Institute of Petroleum Engineering,Beijing 100101,China;Southwest Drilling Company of SINOPEC Zhongyuan Petroleum Engineering Ltd.,Chengdu 610052,China)

机构地区：[1]中国石化石油工程技术研究院,北京100101 [2]中石化中原石油工程公司西南钻井分公司,四川成都610052

出　　处：《中国矿业》2019年第5期66-71,共6页China Mining Magazine

基　　金：中国石化科技部攻关项目"精细控压钻井技术推广应用"和"干热岩勘探开发关键工程技术研究"资助

摘　　要：控压钻井(MPD)系统可不关井对微量气侵进行控制,并将侵入流体安全循环出井。但MPD控制气侵的关键在于气侵早期监测及控制方法的制定。本文分析了MPD钻进过程及气侵瞬间井底压力、井口压力变化情况,通过理论推导得出了气侵瞬间井口压力、井底压力的响应特征,建立了基于无因次压力导数的MPD气侵监测方法。另外,分析了MPD气侵控制方法优选的影响因素,综合考虑地层特性、钻井工况等建立了控压钻井气侵控制与安全排溢参数的优选流程,一旦气侵,通过该流程可确定最优的气侵控制参数。运用现场数据对MPD气侵监测方法与控制方法进行了应用分析,结果表明:运用无因次压力导数能够及时发现气侵,运用建立的排溢控制方法能够很好地对气侵进行控制,表明该方法具有一定的理论与应用价值。The equipment commonly used in MPD allows alternative responses to kick that do not require that circulation ceases and the well shuts in.The pivotal issue of kick control for MPD is the early gas influx detection and the initial response of kick.The pressure variation characteristics of bottom hole and well head are analyzed,and then the pressure signature of gas influx is obtained based on the theoretical analyzed,and finally the early gas influx detection model of MPD is established.The influence factors for initial response selection of kick control is analyzed,and then the comprehensive optimization of initial response for kick control is established,in which several factors are took into account,such as formation characteristics,drilling conditions and so on,through which the best initial response for kick control can be obtained easily.The method is evaluated and verified based on one set of gas kick data from the oilfield,which include both gas kick detection and the kick control.The results show that we can make precisely gas detection based on the new early gas influx detection method and the kick can also be control very well based on the optimization method.The method proposed will lay a foundation for the application and popularization of kick control of MPD in engineering.

关 键 词：控压钻井 气侵监测 压力导数 气侵控制 

分 类 号：TE242[石油与天然气工程—油气井工程]