Numerical Simulation of Hydrate Decomposition during the Drilling Process of the Hydrate Reservoir in the Northern South China Sea

doi:10.3390/en15093273

GIEC OpenIR

	Numerical Simulation of Hydrate Decomposition during the Drilling Process of the Hydrate Reservoir in the Northern South China Sea
	Zhang, Lei 1,2,3; Zhang, Yu1,2,3 ; Chen, Chang 1,2,3; Li, Xiao-Sen1,2,3 ; Chen, Zhao-Yang 1,2,3
	2022-05-01
发表期刊	ENERGIES
卷号	15 期号:9 页码:29
通讯作者	Zhang, Yu(zhangyu1@ms.giec.ac.cn) ; Li, Xiao-Sen(lixs@ms.giec.ac.cn)
摘要	The process of drilling in natural gas hydrate reservoirs in sea areas involves problems such as hydrate decomposition and wellbore instability. To study the response behaviors of a reservoir during the drilling process, a two-dimensional numerical model of drilling fluid invading a hydrate reservoir in a cylindrical coordinate system was established to simulate the processes of heat and mass transfer, gas-liquid two-phase flow, and hydrate formation and decomposition in the hydrate reservoir during the drilling process. Based on the hydrate reservoir at station W17, Shenhu area of the South China Sea, the physical property response of the hydrate reservoir under different drilling fluid temperatures and salinity values was studied. The simulation results showed that during the drilling process, the temperature and pressure of the reservoir respond rapidly in a large area, further promoting the hydrate decomposition in the reservoir around the wellbore and leading to secondary hydrate formation. Moreover, a high hydrate saturation zone appears near the decomposed hydrate area in the layer without free gas, which corresponds to the low water saturation and high salinity zone. The hydrate decomposition area in the layer with free gas is larger than that without free gas. The increase in the drilling fluid temperature significantly enhances the hydrate decomposition in both layers of the reservoir. The hydrate decomposition near the wellbore under the high drilling fluid temperature will cause a sharp increase in the pressure in the reservoir, leading to the flow of pore fluid into the wellbore. The increase in drilling fluid salinity has little effect on the range of the hydrate decomposition in the reservoir but significantly increases the salinity of the pore water in the layer with free gas. As the drilling fluid temperature increases, the possibility of the gas invasion from the reservoir into the wellbore will be greatly increased at the early stage.
关键词	drilling process hydrate decomposition secondary hydrate formation drilling fluid temperature salinity
DOI	10.3390/en15093273
关键词[WOS]	METHANE HYDRATE ; WELLBORE INSTABILITY ; BEARING SEDIMENTS ; SHENHU AREA ; GAS ; MODEL ; STABILITY ; INVASION ; KINETICS ; MUD
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52076208] ; National Natural Science Foundation of China[51736009] ; Guangdong Special Support Program[2019BT02L278] ; Special Project forMarine Economy Development of Guangdong Province[GDME-2020D044]
WOS研究方向	Energy & Fuels
项目资助者	National Natural Science Foundation of China ; Guangdong Special Support Program ; Special Project forMarine Economy Development of Guangdong Province
WOS类目	Energy & Fuels
WOS记录号	WOS:000794492700001
出版者	MDPI
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36458
专题	中国科学院广州能源研究所
通讯作者	Zhang, Yu; Li, Xiao-Sen
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 2.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100083, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Zhang, Lei,Zhang, Yu,Chen, Chang,et al. Numerical Simulation of Hydrate Decomposition during the Drilling Process of the Hydrate Reservoir in the Northern South China Sea[J]. ENERGIES,2022,15(9):29.
APA	Zhang, Lei,Zhang, Yu,Chen, Chang,Li, Xiao-Sen,&Chen, Zhao-Yang.(2022).Numerical Simulation of Hydrate Decomposition during the Drilling Process of the Hydrate Reservoir in the Northern South China Sea.ENERGIES,15(9),29.
MLA	Zhang, Lei,et al."Numerical Simulation of Hydrate Decomposition during the Drilling Process of the Hydrate Reservoir in the Northern South China Sea".ENERGIES 15.9(2022):29.