顺北56X特深水平井钻井关键技术  

Key Technologies for the Drilling of Ultra-Deep Horizontal Well Shunbei 56X

作　　者：白彬珍[1,2,3] 曾义金 葛洪魁[1] BAI Binzhen;ZENG Yijin;GE Hongkui(College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing,102249,China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing,102206,China;Sinopec Research Institute of Petroleum Engineering Co.Ltd.,Beijing,102206,China)

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]页岩油气富集机理与有效开发国家重点实验室,北京102206 [3]中石化石油工程技术研究院有限公司,北京102206

出　　处：《石油钻探技术》2022年第6期49-55,共7页Petroleum Drilling Techniques

基　　金：中国石化科技攻关项目“特深层安全高效钻井关键技术”(编号:P21081-2)部分研究内容。

摘　　要：顺北56X井是部署在顺北V号条带的超深重点风险预探井,钻井过程中面临二叠系和志留系易漏失、奥陶系破碎地层井壁稳定性差、奥陶系桑塔木组易井斜、井眼轨迹控制难和储层钻遇裂缝带气侵等技术难点。为此,针对二叠系、志留系和奥陶系的地质特征,选用防漏堵漏钻井液和高温强封堵油基钻井液,并制定相应维护处理措施,有效预防了二叠系和志留系的漏失,保障了奥陶系的井壁稳定;应用“大扭矩螺杆+垂直钻井系统”防斜打快技术,实现了直井段的防斜打快;通过优化井眼轨道、采用工具面快速调控工艺、配套高温随钻测量技术和制定井眼轨迹技术方案,使该井井眼轨迹与井眼轨道符合度高,实现准确中靶;利用“微过平衡密度+简易控压”钻井技术,解决了储层钻遇裂缝带气侵的问题。顺北56X井钻井过程中未出现井控风险,准确中靶,顺利钻至井深9300.00 m(垂深8087.94 m)完钻,成为我国目前最深的水平井,同时也是目前亚洲陆上最深的水平井。该井安全成井,表明我国具备了钻特深水平井的能力,可为中国石化“深地一号”工程顺北特深层油气藏勘探开发提供技术支撑。Well Shunbei 56X is a major ultra-deep wildcat well for the deployment of the Shunbei V Strip. While drilling this well, loss of circulation happened easily in the Permian and Silurian systems, with attendant technical problems, such as the poor stability of well walls in Ordovician fractured formations, well deviation in Ordovician Sangtamu Formation, difficulty in controlling the well trajectory, and gas kicks of fracture zones drilled in reservoirs, etc.Therefore, to remedy the geological characteristics tied to the Permian, Silurian, and Ordovician formations, an antileakage and plugging drilling fluid and the high-temperature oil-based drilling fluid with strong plugging properties were selected, and corresponding maintenance and treatment measures were formulated. It could effectively prevent loss of circulation in Permian and Silurian systems and ensure the well wall stability in the Ordovician system. The technology of “ high-torque positive displacement drill(PDM) + vertical drilling system” was applied to achieve deviation prevention and fast drilling of the vertical sections of the well. Moreover, with a combination of well-path optimization,fast regulation of tool faces, matching technology of high-temperature measurement while drilling(MWD), and well trajectory design, the trajectory of the well was highly consistent with the well-path to achieve accurate target hits. The technology of “slightly overbalanced density design + simple managed pressure drilling” was utilized to solve the gas kick problem of fracture zones drilled in reservoirs. During the drilling of Well Shunbei 56X, no well control risks were identified, and targets were accurately hit. The well was smoothly drilled to the depth of 9 300.00 m(a vertical depth of 8 087.94 m),which makes it the deepest horizontal well in China and the deepest onshore horizontal well in Asia so far. The safe completion of this well shows that China is capable of drilling ultra-deep horizontal wells, and can provide a technical support for for expl

关 键 词：特深水平井 防斜打快 钻井液 井眼轨迹 控压钻井 顺北56X井 顺北油气田 

分 类 号：TE921[石油与天然气工程—石油机械设备]