Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study

Gas hydrate is regarded as an alternative energy source to fossil fuels in the future. In particular, the pore-filling gas hydrate has the advantages of wide distribution and large reserves, which is of great significance for commercial exploitation. We focus on the amplitude-versus-angle (AVA) patt...

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Autores principales:	Dongmei Tian, Shengxiong Yang, Xuewei Liu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Gas hydrate AVA analysis Rock physics model Shuey’s equation Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/1075f074727f44d28ca016411ce876fd
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spelling	oai:doaj.org-article:1075f074727f44d28ca016411ce876fd2021-11-28T04:34:21ZIdentification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study2352-484710.1016/j.egyr.2021.10.109https://doaj.org/article/1075f074727f44d28ca016411ce876fd2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721011276https://doaj.org/toc/2352-4847Gas hydrate is regarded as an alternative energy source to fossil fuels in the future. In particular, the pore-filling gas hydrate has the advantages of wide distribution and large reserves, which is of great significance for commercial exploitation. We focus on the amplitude-versus-angle (AVA) patterns of reflection interfaces overlying by different pore-filling minerals deposits in order to identify gas hydrate from marine sediments. The AVA responses of different reflection models are obtained based on rock physics model and approximated Zoeppritz equation. The theoretical results show class III AVA patterns for pore-filling gas hydrate deposits and class IV AVA patterns for other pore-filling minerals deposits. In addition, we analyze the effect of gas saturation and different minerals saturation on the AVA patterns. The prestack seismic data of sites GMGS2-08 and GMGS2-16 in South China Sea is processed and the common reflection point (CRP) gathers are applied to verify our theoretical results. The AVA patterns of actual reflection interface overlying by pore-filling gas hydrate deposits and other pore-filling minerals deposits are class III and IV, respectively, in agreement with theoretical results. And the class IV AVA responses for reflection interfaces overlying by fracture-filling gas hydrate studied by predecessors are also tested in our study area. We then propose a new approach to identify pore-filling gas hydrate from marine sediments by AVA analysis.Dongmei TianShengxiong YangXuewei LiuElsevierarticleGas hydrateAVA analysisRock physics modelShuey’s equationElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 8368-8377 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Gas hydrate AVA analysis Rock physics model Shuey’s equation Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Gas hydrate AVA analysis Rock physics model Shuey’s equation Electrical engineering. Electronics. Nuclear engineering TK1-9971 Dongmei Tian Shengxiong Yang Xuewei Liu Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study
description	Gas hydrate is regarded as an alternative energy source to fossil fuels in the future. In particular, the pore-filling gas hydrate has the advantages of wide distribution and large reserves, which is of great significance for commercial exploitation. We focus on the amplitude-versus-angle (AVA) patterns of reflection interfaces overlying by different pore-filling minerals deposits in order to identify gas hydrate from marine sediments. The AVA responses of different reflection models are obtained based on rock physics model and approximated Zoeppritz equation. The theoretical results show class III AVA patterns for pore-filling gas hydrate deposits and class IV AVA patterns for other pore-filling minerals deposits. In addition, we analyze the effect of gas saturation and different minerals saturation on the AVA patterns. The prestack seismic data of sites GMGS2-08 and GMGS2-16 in South China Sea is processed and the common reflection point (CRP) gathers are applied to verify our theoretical results. The AVA patterns of actual reflection interface overlying by pore-filling gas hydrate deposits and other pore-filling minerals deposits are class III and IV, respectively, in agreement with theoretical results. And the class IV AVA responses for reflection interfaces overlying by fracture-filling gas hydrate studied by predecessors are also tested in our study area. We then propose a new approach to identify pore-filling gas hydrate from marine sediments by AVA analysis.
format	article
author	Dongmei Tian Shengxiong Yang Xuewei Liu
author_facet	Dongmei Tian Shengxiong Yang Xuewei Liu
author_sort	Dongmei Tian
title	Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study
title_short	Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study
title_full	Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study
title_fullStr	Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study
title_full_unstemmed	Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study
title_sort	identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/1075f074727f44d28ca016411ce876fd
work_keys_str_mv	AT dongmeitian identificationofporefillinggashydratedepositsinmarinesedimentsbasedonamplitudeversusanglestudy AT shengxiongyang identificationofporefillinggashydratedepositsinmarinesedimentsbasedonamplitudeversusanglestudy AT xueweiliu identificationofporefillinggashydratedepositsinmarinesedimentsbasedonamplitudeversusanglestudy
_version_	1718408301887094784

Identification of pore-filling gas hydrate deposits in marine sediments based on amplitude-versus-angle study

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