海上CO_(2)回注大位移井工程关键技术研究  

Study on Key Techniques of Offshore Extended-reach Well Engineeringfor CO_(2) Reinjection

作　　者：张伟国[1,2] 高德利 严德[2] 邓成辉 ZHANG Weiguo;GAO Deli;YAN De;DENG Chenghui(China University of Petroleum(Beijing),Beijing 102249,China;CNOOC China Ltd.,Shenzhen Branch,Shenzhen,Guangdong 518000,China)

机构地区：[1]中国石油大学(北京) [2]中海石油(中国)有限公司深圳分公司

出　　处：《钻采工艺》2024年第5期1-6,共6页Drilling & Production Technology

基　　金：中海石油(中国)有限公司“三新三化”项目“恩平油田CO 2捕集和封存技术研究与示范应用”(编号:YXKY-SXSH-2021-SZ-01)。

摘　　要：CO_(2)回注实现碳捕获和储存是海上油气领域践行“双碳”目标的有效途径之一。针对我国海上CO_(2)回注首口大位移井存在的埋藏浅导致承压能力低、井壁稳定性差、浅地层高造斜率所致的定向钻井轨迹控制难、高浓度高压力超临界CO_(2)对井筒的完整性要求高等技术问题,基于南海东部前期大位移井设计和作业经验,通过理论分析、工程设计和技术攻关,形成了钻井液体系“复合固壁”、浅层大位移井ECD精控、浅地层高造斜率井段定向控制等技术,并构建了多套耐CO_(2)腐蚀的固井水泥浆体系。技术研究成果成功应用于E-X井工程,该井完钻井深3709 m、水平位移3212.96 m、垂深894.31 m,井壁稳定性和井筒完整性良好,满足了CO_(2)回注相关技术要求。研究成果积累了海上CO_(2)回注大位移井工程技术经验,填补了国内海上CCS技术及其应用的空白。Carbon Capture and Storage(CCS)through CO_(2) reinjection is one of effective ways to achieve China′s dual carbon goals in offshore oil and gas field.In view of the low pressure bearing capacity and poor wellbore stability caused by shallow burial in the drilling of China′s first offshore extended-reach well for CO_(2) reinjection,the difficulty of directional drilling trajectory control caused by shallow formation deviation,and the high requirements of high concentration and high pressure supercritical CO_(2) for well integrity assurance,the“composite reinforcement of wellbore”technology of drilling fluid system,the ECD fine control technology of shallow extended-reach well and the directional control technology of shallow high deviated well section have been formed,and several sets of CO_(2) corrosion resistant cementing slurry systems constructed through theoretical analysis,engineering design and scientific research,based on the previous design and operation experience of extended-reach well in the Eastern of South China Sea.The technical research results have been successfully applied to E-X well building with total depth of 3,709 m,horizontal displacement of 3,212.96 m and vertical depth of 894.31 m.The wellbore stability and well integrity were good,and met the relevant technical requirements.The research results show that the engineering technology experience of offshore extended-reach CO_(2) reinjection wells has been accumulated and the gap of domestic offshore CCS technology and its application filled.

关 键 词：大位移井 海洋钻井 CCS技术 回注井 井筒完整性 

分 类 号：TE53[石油与天然气工程—油气田开发工程]