深海井口吸力锚安装分析与实践  

Analysis and practice of wellhead suction anchor installation in deep sea

作　　者：韩泽龙 宋刚[1] 牛庆磊[1] 邵玉涛[1] 崔淑英[1] 朱嵘华 李博 陈根龙[1] HAN Zelong;SONG Gang;NIU Qinglei;SHAO Yutao;CUI Shuying;ZHU Ronghua;LI Bo;CHEN Genlong(Institute of Exploration Techniques,CAGS,Langfang Hebei 065000,China;Ocean College,Zhejiang University,Zhoushan Zhejiang 316021,China;Guangzhou Marine Geological Survey,CGS,Guangzhou Guangdong 511458,China)

机构地区：[1]中国地质科学院勘探技术研究所,河北廊坊065000 [2]浙江大学海洋学院,浙江舟山316021 [3]广州海洋地质调查局,广东广州511458

出　　处：《钻探工程》2023年第5期109-115,共7页Drilling Engineering

基　　金：广东省科技厅项目“海域天然气水合物随钻测井和钻采井口稳定关键技术及装备研发”(编号:2020B1111030003);广东省重点领域研发计划项目“海上风电吸力筒导管架基础高效多体联动沉贯装备研制与产业化”(编号2021B0707030001);中国地质调查局地质调查项目“神狐海域天然气水合物先导试验区试采实施”(编号DD20190227);“QDN海域天然气水合物先导”(编号DD20211349);“深海钻探工程关键技术支撑”(编号DD20221721)。

摘　　要：第二轮海域天然气水合物试采在神狐海域首次应用了深海井口吸力锚技术,为浅软地层水平井开采水合物提供了稳定的井口支撑。通过理论计算及有限元分析对吸力锚沉贯过程中的自重沉贯深度以及需求负压进行研究,同时现场采用“步渐间歇式自重贯入、拖拽连续负压沉贯”施工工艺,保障了国产首个深海井口吸力锚成功安装。现场实践结果表明,理论计算结果与实际施工情况较为接近,理论分析可指导井口吸力锚安装;沉贯施工工艺快速、高效、安全,井口吸力锚安装的各项指标满足使用需求,对吸力锚技术在深海油气领域应用具有借鉴意义。During the second gas hydrate trial production test,the deep‑sea wellhead suction anchor technology was firstly applied in the Shenhu sea area,which provids stable wellhead support for horizontal gas hydrate production wells in shallow soft formations.Through the theoretical calculation and finite element analysis,the self‑weight penetration depth and negative pressure demand in the process of suction anchor penetration are studied.At the same time,the construction technology of“step‑by‑step intermittent self‑weight penetration,dragging and continuous negative pressure sinking”was adopted in site,which ensured the successful installation of the first domestically produced deep‑sea wellhead suction anchor.The field practice results show that the theoretical calculation results are close to the actual construction situation,and the theoretical analysis can guide the installation of suction anchors at the wellhead.In addition,the penetration construction technology is featured of fast,efficient and safe.The indicators of the wellhead suction anchor installation reached the usage demand.It has referential value for the application of suction anchor technology in the fields of deep‑sea oil and gas.

关 键 词：深海井口吸力锚 海域天然气水合物试采 自重贯入 负压沉贯 

分 类 号：P634[天文地球—地质矿产勘探] TE52[天文地球—地质学]