Application of wellhead suction anchor technology in the second production test of natural gas hydrates in the South China Sea  

作　　者：Bo Li Bei-bei Kou Bin Li Jing Li Jing Zeng Qing-lei Niu Yu-tao Shao Ke-wei Zhang Hao-yu Yu Ying-sheng Wang 

机构地区：[1]Guangzhou Marine Geological Survey,China Geological Survey,Guangzhou 510075,China [2]National Engineering Research Center of Gas Hydrate Exploration and Development,Guangzhou 510075,China [3]Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China [4]Institute of Exploration Techniques,China Academy of Geological Sciences,Langfang 065000,China

出　　处：《China Geology》2022年第2期293-299,共7页中国地质（英文）

基　　金：jointly supported by the Natural Gas Hydrate Exploration and Production Test Project of China Geological Survey (DD20221700);Key-Area Research and Development Program of Guangdong Province (2020B1111030003);Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering G uangdong Laboratory (Guangzhou) (GML2019ZD0504)。

摘　　要：Traditional suction anchor technology is mainly used in the fields of subsea structure bearing foundations,single-point mooring systems and offshore wind power.It is characterized by providing sufficient lateral and vertical bearing capacities and lateral bending moment.The anchor structure of a traditional suction anchor structure is improved with wellhead suction anchor technology,where a central pipe is added as a channel for drilling and completion operations.To solve the technical problems of a low wellhead bearing capacity,shallow built-up depth,and limited application of conductor jetting in the second production test of natural gas hydrates(NGHs)in the South China Sea(SCS),the China Geological Survey(CGS)took the lead in independently designing and manufacturing a wellhead suction anchor,which fulfilled the requirements of the production test.This novel anchor was successfully implemented in the second production test for the first time,providing a stable wellhead foundation for the success of the second production test of NGHs in the SCS.

关 键 词：Wellhead suction anchor Conductor jetting Marine NGHs Production test NGHs exploration trial engineering Oil and gas exploration engineering South China Sea 

分 类 号：TE53[石油与天然气工程—油气田开发工程]