Quantitative assessment of free gas beneath gas hydrate stability zone from prestack seismic data and rock physics: a case of hole NGHP01-10A, Krishna-Godavari basin, India

被引：3

作者：

Qian Jin ^{[1
,2
]}

Wang Xiu-Juan ^{[1
,2
]}

Dong Dong-Dong ^{[1
]}

Wu Shi-Guo ^{[1
,3
]}

Kalachand, Sain ^{[4
]}

Ye Yue-Ming ^{[5
]}

机构：

[1] Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China

[2] Qingdao Natl Lab Marine Sci & Technol, Evaluat & Detect Technol Lab Marine Mineral Resou, Qingdao 266061, Peoples R China

[3] Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China

[4] Natl Geophys Res Inst, Hyderabad 500007, Andhra Pradesh, India

[5] PetroChina, Hangzhou Res Inst Geol, Hangzhou 310023, Zhejiang, Peoples R China

来源：

CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION | 2016年 / 59卷 / 07期

关键词：

Gas hydrate; Rock physics; AVO; Quantitative assessment; Free gas saturation; REFLECTION COEFFICIENTS; EAST-COAST; MARGIN; AVO; SATURATION; EVOLUTION; INVERSION; PART;

D O I：

10.6038/cjg20160720

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Distribution, saturation and hydrate indicator of free gas beneath gas hydrate stability zone have been the difficulty in the research of gas hydrate. Amplitude versus offset (AVO) and rock physics can be used to quantitatively interpret free gas saturation. In this paper, seismic data, acquired at K-G basin, India, have been processed to preserve true amplitude information. Based on the logging data and horizon calibration, free gas saturation of NGHP01-10A is assessed with effective medium theory and AVO modeling. It is found that free gas saturation is related to its distribution patterns. Assessments of free gas saturation in homogeneous and patchy distribution are 0.3%similar to 0.4% and 3%similar to 4%, respectively. The results show good agreement with the crossplot of Poisson's ratio which are calculated by the measurement at NGHP01-10D. Free gas is further deduced to be homogeneous distribution on the base of dry matrix Poisson's ratio with the saturation of 0.3%similar to 0.4%.

引用

页码：2553 / 2563

页数：11

共 41 条

[1]

Aki K., 2002, QUANTITATIVE SEISMOL

[2]

[Anonymous], 2008, NGHP EXPEDITION 01 S

[3]

[Anonymous], P 8 2009 ISOPE OC MI

[4]

[Anonymous], MARINE GEOLOGY QUATE

[5]

CASTAGNA J.P., 1997, The Leading Edge, V16, P337, DOI [10.1190/1.1437626, DOI 10.1190/1.1437626]

[6]

Chen DF, 2005, CHINESE J GEOPHYS-CH, V48, P165

[7] Exploration for gas hydrates in the deepwater, northern Gulf of Mexico: Part I. A seismic approach based on geologic model, inversion, and rock physics principles [J].

Dai, Jianchun ;

Snyder, Fred ;

Gillespie, Diana ;

Koesoemadinata, Adam ;

Dutta, Nader .

MARINE AND PETROLEUM GEOLOGY, 2008, 25 (09) :830-844

[8] Seabed morphology and gas venting features in the continental slope region of Krishna Godavari basin, Bay of Bengal: Implications in gas-hydrate exploration [J].

Dewangan, P. ;

Ramprasad, T. ;

Ramana, M. V. ;

Mazumdar, A. ;

Desa, M. ;

Badesab, F. K. .

MARINE AND PETROLEUM GEOLOGY, 2010, 27 (07) :1628-1641

[9] Acoustic signatures of patchy saturation [J].

Dvorkin, J ;

Nur, A .

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 1998, 35 (34-35) :4803-4810

[10] Identifying patchy saturation from well logs [J].

Dvorkin, J ;

Moos, D ;

Packwood, JL ;

Nur, AM .

GEOPHYSICS, 1999, 64 (06) :1756-1759

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