苏北断块页岩油水平井钻井提速关键技术  

Key Technologies for Enhancing the Drilling Speed of Fault Block Shale Oil Horizontal Wells in Subei Basin

作　　者：秦春 刘纯仁 李玉枝 王治国 陈文可 QIN Chun;LIU Chunren;LI Yuzhi;WANG Zhiguo;CHEN Wenke(Jiangsu Drilling Company,Sinopec Huadong Oilfield Service Corporation,Yangzhou,Jiangsu,225000,China)

机构地区：[1]中石化华东石油工程有限公司江苏钻井公司,江苏扬州225000

出　　处：《石油钻探技术》2024年第6期30-36,共7页Petroleum Drilling Techniques

基　　金：中国石化集团公司科研项目“苏北页岩油藏高效钻井与压裂关键技术研究”(编号:P22096);中石化石油工程公司科研项目“页岩油石油工程关键技术”子课题“苏北盆地页岩油钻井关键技术研究与应用”(编号:SG22-16K)联合资助。

摘　　要：苏北盆地阜二段页岩油水平井施工时存在井身结构设计有待优化、井壁稳定性差、井眼轨迹控制难度大及井控风险高等提速难题。为解决这些问题,基于地质-工程一体化,进行了井身结构及井眼轨道优化、PDC钻头个性化设计及钻具组合优选的分层提速技术、定-测-录-导一体化的钻遇断层井眼轨迹控制技术研究,并集成强化钻井参数、减摩降扭提速、强封堵白油基钻井液和双密度钻井液精细控压防压窜安全钻井等配套技术,形成了苏北断块页岩油水平井钻井提速关键技术。苏北断块5口页岩油水平井应用该技术后,钻井周期大幅缩短,平均机械钻速由7.19 m/h提至16.47 m/h。研究表明,苏北断块页岩油水平井钻井提速关键技术满足该断块页岩油水平井钻井提速需求,为该断块页岩油效益规模开发提供了技术支撑。During the operation of shale oil horizontal wells in the second section of Funing Formation in Subei Basin,problems occur such as casing program await to be optimized,poor wellbore stability,difficulty in well trajectory control,and high well control risks,etc.Therefore,based on integration of geology and engineering,a layered speed-up technology was developed,including casing programs and well trajectory optimization,polycrystalline diamond compact(PDC)drill bit personalization design,and an optimal bottom hole assembly(BHA)selection.In addition,a well trajectory control technology for encountering fault during drilling that integrates directional drilling,logging,and steering was studied.The supporting technologies such as enhanced parameter drilling,friction and torque reduction for speed-up,white oil-based drilling fluid for strong sealing,and double-density drilling fluid for fine pressure control,and safety drilling with anti-channeling induced by pressure were developed.As a result,the key technologies for enhancing the drilling speed of fault block shale oil horizontal wells in Subei Basin were formed.These technologies were applied in five shale oil horizontal wells.As a result,the drilling cycle was greatly shortened,and the average rate of penetration(ROP)increased from 7.19 m/h to 16.47 m/h.The research results show that these technologies meet the drilling speed-up requirements for shale oil horizontal wells and provide technical support for the efficient and large-scale development of the shale oil.

关 键 词：地质-工程协同优化 分层提速 井眼轨迹控制 防压窜 安全钻井 苏北盆地 

分 类 号：TE242[石油与天然气工程—油气井工程]