Controls on the Gas Hydrate Occurrence in Lower Slope to Basin-Floor,Northeastern Bay of Bengal

作     者：LU Yintao LUAN Xiwu SHI Boqing FAN Guozhang RAN Weimin XU Ning WANG Haiqiang SHAO Dali DING Liangbo WANG Xingxing LU Yintao;LUAN Xiwu;SHI Boqing;FAN Guozhang;RAN Weimin;XU Ning;WANG Haiqiang;SHAO Dali;DING Liangbo;WANG Xingxing

作者机构：Petrochina Hangzhou Research Institute of GeologyHangzhou 310023China School of Earth Science and EngineeringShandong University of Science and TechnologyQingdao 266590China China National Oil and Gas Exploration and Development CompanyBeijing 100031China Qingdao Institute of Marine GeologyChina Geological SurveyQingdao 266071China College of Marine Science and TechnologyChina University of GeosciencesWuhan 430074China 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2022年第21卷第4期

页      面：813-826页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：We wish to thank the China National Oil and Gas Exploration and Development Company(CNODC)and Hangzhou Research Institute of Geology research team for providing the seismic data and approving this publication.The research is funded by the National Natural Science Foundation of China(Nos.92055211,42076219,42006067) the Construction Project of China ASEAN Marine Seismic Data Platform and Research Center(No.1212010050017001) 

主　　题：Bay of Bengal gas hydrate anticline turbidite sands 

摘      要：High resolution seismic data and newly acquired logging data reveal the presence of gas hydrates in the deep-water area in the northeastern Bay of *** Simulating Reflectors(BSRs)appear at 430 ms beneath the seafloor,with the features of typical gas hydrates reported elsewhere except for some *** BSR distribution is closely related to the position of anticline structures and turbidite *** provide conduits for the upward migration of gases from deeper intervals,while the turbidite sands within channels act as reservoirs for gas hydrate *** sedimentation rates in the Bengal Fan were ge-nerally favorable to produce a great amount of methane gas,providing favorable preconditions for the formation of gas *** discovery of gases in adjacent area indicates the contribution of the biogenic gas to the formation of gas ***,seismic sections provide the evidence for the potential thermogenic gas kitchen in deep *** anticline structures and the associated vertical fractures may constitute vertical fluid flowing conduits,which hydraulically connect the two deeper thermogenic petroleum systems(i.e.,rifting and Eocene-Oligocene source rocks)with the turbidite reservoirs and thus facilitate the fluid migration from the sources to the reservoirs,generating favorable conditions for gas-hydrate accumulation in such foreland setting.