Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study

doi:10.1016/j.marpetgeo.2017.05.037

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study
	Liang, Jinqiang 3; Sun, Jiaxin 5; Zhang, Ling 5; Ning, Fulong 5,6; Lei, Hongwu 1; Liu, Tianle 5; Hu, Gaowei 2,6; Lu, Hailong 4,6; Lu, Jingan 3; Liu, Changling 2,6
刊名	MARINE AND PETROLEUM GEOLOGY
	2017
卷号	86 页码:447-473
关键词	Gas hydrate Production potential Geomechanical response Numerical simulation
ISSN号	0264-8172
DOI	10.1016/j.marpetgeo.2017.05.037
英文摘要	According to the preliminary geological data of gas hydrate bearing-sediments (GHBS) at site GMGS3-W19 in the third Chinese expedition to drill gas hydrates in 2015, a production model using three different recovery pressures was established to assess the production feasibility from both production potential and geomechanical response. The simulation results show that for this special Class 1 deposit, it is a little hard for gas production rate to reach the commercial extraction rate because the degree of hydrate dissociation is limited due to the low reservoir permeability and the permeable burdens. However, the free gas accumulating in the lower part of the GHBS can significantly increase gas-to-water ratio. It also generates many secondary hydrates in the GHBS at the same time. Decreasing the well pressure can be beneficial to gas recovery, but the recovery increase is not obvious. In term of geomechanical response of the reservoir during the gas recovery, the permeable burdens are conducive to reduction of the sediment deformation, though they don't facilitate the gas recovery rate. In addition, significant stress concentration is observed in the upper and lower edges of GHBS around the borehole during depressurization because of high pressure gradient, and the greater the well pressure drop, the more obvious the phenomenon. Yield failures and sand production easily take place in the edges. Therefore, in order to achieve the purpose of safe, efficient and long-term gas production, a balance between the production pressure and reservoir stability should be reached at the hydrate site. The production pressure difference and sand production must be carefully controlled and the high stress concentration zones need strengthening or sand control treatment during gas production. Besides, the sensitivity analyses show that the hydrate saturation heterogeneity can affect the production potential and geomechanical response to some extent, especially the water extraction rate and the effective stress distribution and evolution. Increasing GHBS and its underlying free gas formation permeabilities can enhance the gas production potential, but it probably introduces geomechanical risks to gas recovery operations. (C) 2017 Elsevier Ltd. All rights reserved.
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000411296600027
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4136]
专题	岩土力学所知识全产出_期刊论文
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech ; 2.Qingdao Inst Marine Geol, Key Lab Gas Hydrate, Minist Land & Resources ; 3.Minist Land & Resources, Guangzhou Marine Geol Survey 4.Peking Univ, Coll Engn ; 5.China Univ Geosci, Fac Engn ; 6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources ;
推荐引用方式 GB/T 7714	Liang, Jinqiang,Sun, Jiaxin,Zhang, Ling,et al. Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study[J]. MARINE AND PETROLEUM GEOLOGY,2017,86:447-473.
APA	Liang, Jinqiang.,Sun, Jiaxin.,Zhang, Ling.,Ning, Fulong.,Lei, Hongwu.,...&Wu, Nengyou.(2017).Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study.MARINE AND PETROLEUM GEOLOGY,86,447-473.
MLA	Liang, Jinqiang,et al."Production potential and stability of hydrate-bearing sediments at the site GMGS3-W19 in the South China Sea: A preliminary feasibility study".MARINE AND PETROLEUM GEOLOGY 86(2017):447-473.