Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling

doi:10.1111/1365-2478.13402

IOCAS-IR > 海洋地质与环境重点实验室

	Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling
	Liu, Bo 1,2,3,4,5; Wang, Xiujuan 2,3,6,11,12; Su, Pibo 7,13; Li, Qingping 8; Wan, Xiaoming 9; Li, Jie; Li, Yuanping 10; Zhou, Jilin2,3,4,5 ; Jin, Jiapeng 2,3; Sun, Luyi 4,5
	2023-07-24
发表期刊	GEOPHYSICAL PROSPECTING
ISSN	0016-8025
页码	17
通讯作者	Wang, Xiujuan([email protected]) ; Su, Pibo([email protected])
摘要	The complex contacts between gas hydrate and free gas have been confirmed by gas hydrate pilot production in the Pearl River Mouth Basin, South China Sea. The laminated clay silt reservoirs have high amplitude reflections which may be filled with different saturations of gas hydrates, free gas and the coexistence between gas hydrate and free gas. To distinguish the variations of amplitude reflections caused by different reservoirs properties below the bottom simulating reflection, we combine the forward modelling, pre-stack gathers with different incident angles and well log analysis to conduct the seismic responses. A number of geological models are established with variable saturations and different interfaces between gas hydrate and free gas. First, we analyse the seismic and well log responses at Sites W11, W01 and W17 near the production test area. Then, we perform the forward modelling to quantify the differences among seismic reflections with different saturations, thickness, incident angles and strata dips in free gas- or gas hydrate-bearing geological models. We extract the seismic amplitudes along the bottom simulating reflection and other layers to compare with the amplitudes generated from forward modelling. The results indicate that the inclined intervals below the bottom simulating reflection have high amplitude, continuous reflection and polarity reversal which may be caused by thin gas reservoir and the interlayered gas hydrate and free gas with different saturations. The top interfaces of the gas hydrate- and free gas-bearing layers show typical Class III amplitude versus offset and exhibit high amplitude reflections at seismic data with near, mid and far-incident angles, which are easy to distinguish. Seismic response of far-incident angle can be used to identify the coexistence of gas hydrate and free gas.
关键词	Compagnie Generale deGeophysique complex contact forward modelling free gas gas hydrate seismic response
DOI	10.1111/1365-2478.13402
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[41976077]; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2021KG09]; Guangdong Province Marine Economic Development (Six Major Marine Industries) Special Fund Project[2021]; Guangdong Province Marine Economic Development (Six Major Marine Industries) Special Fund Project[58]; National Key Ramp;D Program of China[2017YFC0307301-1]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001034078500001
出版者	WILEY
WOS关键词	WESTERN CONTINENTAL-MARGIN ; EASTERN NANKAI TROUGH ; RIVER MOUTH BASIN ; METHANE HYDRATE ; SHENHU AREA ; BEARING SEDIMENTS ; STABILITY ZONE ; DOWNHOLE LOG ; SEISMIC DATA ; CHINA
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.qdio.ac.cn/handle/337002/182557
专题	海洋地质与环境重点实验室
通讯作者	Wang, Xiujuan; Su, Pibo
作者单位	1.Hebei Univ Engn, Sch Earth Sci & Engn, Handan, Peoples R China 2.Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Deep Sea Multidisciplinary Res Ctr, Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 6.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Submarine Geosci & Prospecting Tech, MOE & Coll Marine Geosci, Qingdao, Peoples R China 7.China Geol Survey, Sanya Inst South China Sea Geol, Acad South China Sea Geol Sci, Sanya, Peoples R China 8.CNOOC Res Inst Co Ltd, State Key Lab Nat Gas Hydrate, Beijing, Peoples R China 9.China Geol Survey, Haikou Marine Geol Survey Ctr, Haikou, Peoples R China 10.China Natl Offshore Oil Corp Ltd, Shenzhen Branch, Shenzhen, Peoples R China 11.Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 12.Deep sea Multidisciplinary Res Ctr, Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao 266237, Peoples R China 13.China Geol Survey, Sanya Inst South China Sea Geol, Acad South China Sea Geol Sci, Sanya 572025, Peoples R China
推荐引用方式 GB/T 7714	Liu, Bo,Wang, Xiujuan,Su, Pibo,et al. Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling[J]. GEOPHYSICAL PROSPECTING,2023:17.
APA	Liu, Bo.,Wang, Xiujuan.,Su, Pibo.,Li, Qingping.,Wan, Xiaoming.,...&Sun, Luyi.(2023).Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling.GEOPHYSICAL PROSPECTING,17.
MLA	Liu, Bo,et al."Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling".GEOPHYSICAL PROSPECTING (2023):17.