The application of constrained sparse spike impedance inversion to seismic exploration of land gas hydrate
WANG Kai1, 2, 3, CHEN De-Yuan1, 2, ZHANG Kai1, 2, YUE Hang-Yu1, 2, ZHANG Bao-Wei1, 2, WANG Xiao-Jiang1, 2
1.Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China; 2.National Modern Geological Exploration Technology Research Center,Langfang 065000,China; 3.College of GeoExploration Science and Technology,Jilin University,Changchun 130026,China
Abstract：Natural gas hydrates are mainly distributed below the seabed and in the permafrost zones.There are obvious characteristics for the impedance of the sea gas hydrate.Nevertheless,very insufficient research has been focused on the impedance characteristics of the land gas hydrate.In this paper,the research aimed at the land gas hydrate in Muli area of the Tibetan Plateau.The authors used the constrained sparse-spike method to invert the impedance with 2D reflected seismic profile which crossed the DK-9 well.The authors analyzed the features of the impedance profile of the four layers that contain gas hydrate.The results show that the impedance of land gas hydrate reservoir is on the whole the same as things of the surroundings.There are a lot of difficulties in detecting the land gas hydrate with wave impedance individually,and hence the reservoir should be detected in combination with other geological and geophysical data.
王凯, 陈德元, 张凯, 岳航羽, 张保卫, 王小江. 青海木里地区陆域天然气水合物地震波阻抗特征研究[J]. 物探与化探, 2017, 41(6): 1105-1112.
WANG Kai, CHEN De-Yuan, ZHANG Kai, YUE Hang-Yu, ZHANG Bao-Wei, WANG Xiao-Jiang. The application of constrained sparse spike impedance inversion to seismic exploration of land gas hydrate. Geophysical and Geochemical Exploration, 2017, 41(6): 1105-1112.
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