Seismic data processing and the characterization of a gas hydrate bearing zone offshore of southwestern Taiwan

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院边缘海地质重点实验室

	Seismic data processing and the characterization of a gas hydrate bearing zone offshore of southwestern Taiwan
	Deng, H ; Yan, P ; Liu, HL ; Luo, WZ
刊名	TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
	2006
卷号	17 期号:4 页码:781-797
关键词	gas hydrate bottom-simulating reflector seismic imaging AVO analysis AVO inversion offshore southwestern Taiwan
ISSN号	1017-0839
通讯作者	nhsdenghui@163.com
中文摘要	Various seismic attributes of gas hydrate bearing sediments were analyzed in the accretionary prism offshore of southwestern Taiwan utilizing seismic imaging, velocity analysis, AVO analysis, and AVO inversion of large offset seismic data. A bottom-simulating reflector (BSR) is clearly observed on the seismic section with a reversed polarity compared to that of the seabed reflection. Instantaneous amplitude sectioning clearly shows lateral variations of the BSR. The zero-phase waveform of the BSR is distinct and the weak reflectors above the BSR can be observed on the instantaneous phase section. AVO analysis shows the absolute value of the negative BSR amplitude increasing with offset. A low P-wave interval velocity layer was found below the strong BSR by detailed velocity analysis. Both the P (normal incident P-wave reflection coefficient) and G (AVO gradient) values are highly negative for the strong BSR on the P and G sections, and they lie in the third quadrant of the P and G cross-plot section. The P+G (reflectivity of Poisson's ratio) value is also negative on the P+G section and the P-G (normal incident S-wave reflection coefficient) value is approximately zero on the P-G section along the same strong BSR. All the seismic characters described above suggest that a gas hydrate layer exists together with a free gas layer below it along strong BSRs in the area offshore southwestern Taiwan.
学科主题	Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; Oceanography
收录类别	SCI
原文出处	CHINESE GEOSCIENCE UNION
WOS记录号	WOS:000243814800010
公开日期	2011-07-03
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/4380]
专题	南海海洋研究所_中科院边缘海地质重点实验室
推荐引用方式 GB/T 7714	Deng, H,Yan, P,Liu, HL,et al. Seismic data processing and the characterization of a gas hydrate bearing zone offshore of southwestern Taiwan[J]. TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,2006,17(4):781-797.
APA	Deng, H,Yan, P,Liu, HL,&Luo, WZ.(2006).Seismic data processing and the characterization of a gas hydrate bearing zone offshore of southwestern Taiwan.TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,17(4),781-797.
MLA	Deng, H,et al."Seismic data processing and the characterization of a gas hydrate bearing zone offshore of southwestern Taiwan".TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 17.4(2006):781-797.