摘要：Deep-water natural gas hydrates are commonly found in muddy siltstone at shallow seabed depths. The land subsidence caused by the continuous dissociation of hydrate can influence the stability of the subsea wellhead and facilities. The analysis of formation subsidence pattern around wellbore is helpful to avoid the risk of field operation. A multi-field coupled model for hydrate extraction experiments was established, considering the coupling effects of seepage, mechanical, thermal, and chemical fields based on the storage characteristics of hydrates and the properties of submarine soils. Based on the formation physical parameters and wellbore parameters of the Shenhu area in the South China Sea, a numerical simulation method was used to analyze the formation subsidence pattern around the wellbore under hydrate production test conditions, and a sensitivity analysis of subsidence factors was completed. According to the subsidence patterns obtained, combined with the field operation conditions, the hazardous loads on the conductor throughout its lifecycle during the hydrate production test process were analyzed. A design method for the minimum mud depth of the conductor under hydrate production test conditions was provided. The study of seabed subsidence patterns during natural gas hydrate production tests in deep-water sea is helpful in reducing the instability risk of subsea wellheads and ensuring operation security, which provides a certain of reference for the design of natural gas hydrate production test engineering. 漏 2024 Elsevier Ltd

ISSN号：0141-1187

卷、期、页：卷153

发表日期：2024-12-01

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,地学领域高质量科技期刊分级目录（国外T2）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Applied Ocean Research

参与作者：胡志强,陈章星,马慧珍

通讯作者：张明贺,卢梦杰

第一作者：付超凡,杨进,杨钰龙,殷启帅,李磊宁,李晓山

论文类型：期刊论文

论文概要：付超凡,杨进,杨钰龙,殷启帅,李磊宁,胡志强,张明贺,卢梦杰,李晓山,陈章星,马慧珍，Analysis of subsidence patterns of the formation around the wellbore during deepwater natural gas hydrate test production conditions，Applied Ocean Research，2024，卷153

论文题目：Analysis of subsidence patterns of the formation around the wellbore during deepwater natural gas hydrate test production conditions