【摘要】 广州海洋地质调查局自2000年以来在南海北部陆坡区相继开展了多个航次的天然气水合物资源的调查及研究工作,取得了非常丰富的地震资料.在对这些地震资料精细解释的基础上,识别出了6种典型的地震相:透镜状前积相、丘状前积相、V字型充填相、席状平行相、底辟-气烟囱状杂乱相、丘状杂乱相;并由此分析出3种类型的沉积相:深水浊积相、滑塌相、峡谷水道相.结合似海底反射(BSR)在研究区范围内的分布,研究BSR与各沉积相之间的空间位置关系,由此分析出了3种水合物成藏模式:断层沟通浊积扇体成藏模式、断层沟通峡谷水道成藏模式、断层沟通峡谷水道及滑塌扇体成藏模式.更多还原

【Abstract】 Guangzhou marine geological survey have carried out a number of voyages for gas hydrate investigation and research at the continental slope of northern South China Sea since 2000 and has acquired abundance of seismic data.On the basis of detailed interpretation of those seismic data,this paper recognizes six typical seismic facies,namely lenticular progradation facies,hummocky progradation facies,V-shaped filling facies,sheet parallel facies,diapir-gas chimney disorder facies and hummocky disorder facies.Thus developed three sedimentary facies including deep sea fan,slump and canyon channel facies.Combined with the distribution of the bottom simulating reflector(BSR) in the study area and the spatial relationship of the BSR with the variety of sedimentary facies,three gas hydrate accumulation models have been established as follows:fault communication with deep sea fan,fault communication with canyon channel and fault communication with canyon channel and slump fan.更多还原