海洋地质与第四纪地质2011，Vol.31Issue(1)：109-118,10.DOI:10.3724/SP.J.1140.2011.01109
琼东南盆地块体搬运体系对天然气水合物形成的控制作用
CONTROL OF MASS TRANSPORT DEPOSITS OVER THE OCCURRENCE OF GAS HYDRATE IN QIONGDONGNAN BASIN
摘要
Abstract
Tectonic movement has become inactive since the Miocene in the Qiongdongnan Basin.The thickness of sediments from the Miocene to present comes to 5000～9000 m.The well of Ya35-1-2 reveals that the Pleistocene are dominated by fine-grained sediments characterized by interbedded mudstone and silt.There is lack of vertical pathways for fluid migration.The interpretation of high resolution 2D and 3 D seismic data reveals that there are gas chimneys and mass transport deposits occurred in the Pliocene.The gas chimneys may provide vertical pathways for fluid migration from the deeper sediments to the shallower part.Sediments would be remolded during the transport.The MTD layer usually has higher resistivity, higher density and lower permeability than the bounding sediments due to compaction.It may act as a seal for hydrocarbon accumulation and favor the formation of gas hydrate.关键词
天然气水合物/气烟囱/块体搬运体系/细粒沉积物/琼东南盆地Key words
Gas hydrate/ gas chimney/ MTD/ fine-grained sediment/ Qiongdongnan Basin分类
海洋科学引用本文复制引用
王秀娟,吴时国,董冬冬,郭依群,HUTCHINSON Deborah..琼东南盆地块体搬运体系对天然气水合物形成的控制作用[J].海洋地质与第四纪地质,2011,31(1):109-118,10.基金项目
中国科学院广州天然气水合物研究中心开放基金(0807s5) （0807s5）
中国科学院重要方向性项目(KZCX2-YW-229) （KZCX2-YW-229）
国际科技合作计划项目(2010DFA21740) （2010DFA21740）
