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Integrated analysis of well logs and seismic data to deduce the possible distribution in depth of gas hydrate in Shenhu Area, South China Sea
Xu Hua-Ning1; Zhang Guang-Xue1; Zheng Xiao-Dong2; Wang Ming-Jun3; Yang Sheng-Xiong1; Yang Rui4; Liang Bei-Wen1
2014-10-01
Source PublicationCHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
Volume57Issue:10Pages:3363-3372
AbstractThe available geological and geophysical information indicates the presence of gas hydrate at Shenhu Area of Northern South China Sea. The drilling cores recovered in 2007 testify the expectation and reveal that the gas hydrate disseminates evenly within the hydrate stable zone (HSZ), but its regional distribution is inhomogeneous. However, the logging record length and coring depth coverage are limited, which causes the depth distribution of gas hydrate to be indeterminate. Logs at well site SH7 were used to link the information of physical properties of sediments to the coincident seismic data acquired in this area. According to the relation between physical properties of sediments and seismic reflection characteristics, three primary formations were calibrated and the pseudo-well constrained impedance inversion was then applied on poststack seismic data. The results showed a high velocity zone below the interval bearing gas hydrate. To determine whether this high velocity zone is related to the occurrence of gas hydrate or not, the technique of AVO forward modeling was further used to analyze the reflecting characteristic of pre-stack seismic data. The comparison between synthetic seismic models and real seismic data indicates that the HSZ was composed of thin interbeds of gas hydrate-bearing sediments and water-saturated sediments, which suggests that another gas hydrate deposit exists most likely below the depth where gas hydrate-bearing sediments were cored in the hole.
SubtypeArticle
KeywordShenhu Area Natural Gas Hydrate Avo Forward Modeling Impedance Inversion Depth Distribution
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.6038/cjg20141023
WOS Subject ExtendedGeochemistry & Geophysics
WOS KeywordCONTINENTAL-MARGIN ; MARINE-SEDIMENTS ; METHANE ; NORTH ; SLOPE
Indexed BySCI
Language英语
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000344039800023
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/10762
Collection中国科学院广州能源研究所
Affiliation1.Guangzhou Marine Geol Survey, MLR Key Lab Marine Mineral Resources, Guangzhou 510075, Guangdong, Peoples R China
2.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
3.China Geol Survey, Oil & Gas Survey, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Xu Hua-Ning,Zhang Guang-Xue,Zheng Xiao-Dong,et al. Integrated analysis of well logs and seismic data to deduce the possible distribution in depth of gas hydrate in Shenhu Area, South China Sea[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2014,57(10):3363-3372.
APA Xu Hua-Ning.,Zhang Guang-Xue.,Zheng Xiao-Dong.,Wang Ming-Jun.,Yang Sheng-Xiong.,...&Liang Bei-Wen.(2014).Integrated analysis of well logs and seismic data to deduce the possible distribution in depth of gas hydrate in Shenhu Area, South China Sea.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,57(10),3363-3372.
MLA Xu Hua-Ning,et al."Integrated analysis of well logs and seismic data to deduce the possible distribution in depth of gas hydrate in Shenhu Area, South China Sea".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 57.10(2014):3363-3372.
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