石油钻采工艺2023，Vol.45Issue(5)：548-554,7.DOI:10.13639/j.odpt.202304033
基于机械钻速的地层孔隙压力随钻监测方法
Monitoring method for formation pore pressure while drilling based on rate of penetration
摘要
Abstract
Accurate monitoring of formation pore pressure is a crucial foundation to adjust drilling parameters promptly and ensure safe drilling operations.Currently,domestic formation pore pressure monitoring while drilling is difficult and less accurate.In response,the near-wellbore formation pore pressure redistribution caused by drilling fluid flow during the drilling process was taken into consideration.The correlations among bottom-hole pressure difference,depth of drill bit penetration into the bottom rock and penetration rate were analyzed,and a model(penetration rate method)for monitoring formation pore pressure while drilling was derived and established.Finally,the monitoring results from the penetration rate method were analyzed and compared with the computation results obtained using dc index method and rock strength method.The research results show that there exists a positive correlation between bottom-hole pressure difference and drilling fluid permeation intensity as well as penetration rate,while a negative correlation with the penetration depth of single tooth of the drill bit into the bottom rock.The single-point monitoring accuracy of the penetration rate method is consistently above 95%,with an average error as low as 1.63%,demonstrating its greater applicability.The research results can provide a theoretical support for the timely adjustment of drilling parameters,especially in narrow-density window intervals,ensuring the safety and efficiency of drilling operations.关键词
地层孔隙压力/随钻监测/钻井液渗流/机械钻速/牙齿侵入深度Key words
formation pore pressure/monitoring while drilling/drilling fluid flow/rate of penetration/tooth penetration depth分类
能源科技引用本文复制引用
杨前亮,黄洪林,罗鸣,吴艳辉,李文拓,肖平..基于机械钻速的地层孔隙压力随钻监测方法[J].石油钻采工艺,2023,45(5):548-554,7.基金项目
中海石油(中国)有限公司科研项目"南海西部油田上产2000万方钻完井关键技术研究"(编号:CNOOC-KJ135ZDXM38ZJ05ZJ) （中国）
中海油"十四五"重大科技项目子课题"深水超深水复杂井安全高效钻完井关键技术"(编号:KJGG2022-0201). （编号:KJGG2022-0201）
