Classification of mass-transport complexes and distribution of gashydrate-bearing sediments in the northeastern continental slope of the South China Sea

作     者：Chao FU Xinghe YU Xue FAN Yulin HE Jinqiang LIANG Shunli LI Chao FU;Xinghe YU;Xue FAN;Yulin HE;Jinqiang LIANG;Shunli LI

作者机构：School of Energy ResourcesChina University of GeosciencesBeijing 100083China Zhongyuan Gas Storage Company LimitedSINOPECPuyang 400083China Guangzhou Marine Geological SurveyMinistry of Land and Nature ResourceGuangzhou 510760China 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2020年第14卷第1期

页      面：25-36页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：This research was sponsored by the National 127 Project(No.GZ2011003-05-02-02) National Natural Science Foundation of China(No.41572080),as well as the Major State Science and Technology Research Program(No.2016ZX05024002-002).The authors would like to thank the Guangzhou Marine Geological Survey for providing the geological and seismic data used in this work.We would also like to acknowledge the gas hydrate science team of China University of Geoscience(Beijing) 

主　　题：gas hydrate accumulation pattern masstransport complexes(MTCs) stress distribution South China Sea 

摘      要：The drilling areas in Shenhu and Dongsha,South China Sea,studied from 2007 to 2015,reveal great heterogeneity in the spatial distribution of the gas hydrate *** types of mass-transport complexes(MTCs)were developed in the study areas,which served as ideal *** conduct exploration in these areas,it is necessary to study the different types of MTCs and the corresponding gashydrate *** integrating seismic reflection and log coring data,we classified three types of MTCs according to their stress distribution:the tension,extrusion,and shear types,and their corresponding gashydrate accumulation *** results show that the accumulation of the gas-hydrate varies with the type of MTC and stress distribution depending on the MTC’s position(e.g.,in the headwall,translational,or toe areas).Owing to this variance of the MTC’s position,the corresponding kinemics situation in the MTCs also ***,we determined the corresponding location in which the gashydrate develops for various types of *** on the bottom simulating reflectors(BSRs)and the hydrate core and image logging data,the gashydrate reservoir shows an obvious heterogeneity in various types of *** gashydrate in the tension-type MTCs are mostly borne in the toe and the headwall *** extrusion-type MTCs,the translational and toe parts constitute an ideal hydrate *** shear-type MTCs,the headwall and toe parts’coarse-grained sediments show an obviously hydrate *** comparing the gashydrate saturation and MTCs morphology statics data,we were able to quantitatively prove that the main factors determining gashydrate accumulation in the different types of MTCs are the fault displacement,sedimentary rate,and flow erosion rate.