摘要
泥底辟及滑动-逆冲构造是控制北康盆地天然气水合物成藏的重要浅层构造。泥底辟主要分布于研究区北部和南部,且构造特征有所不同。其中南部泥底辟常与滑动-逆冲构造相伴生,部分泥底辟刺穿至海底形成泥火山,在海底形成多个丘状体。泥底辟和滑动-逆冲构造的存在会对天然气水合物的运聚成藏产生很大影响,首先两种构造可以为天然气水合物成藏提供良好的运移条件,其次与两种构造伴生的裂隙还可以成为有利的天然气水合物储层,同时泥底辟(泥火山)的存在会在一定范围内改变天然气水合物稳定带的温压条件。最终笔者总结/.北康盆地南部泥底辟及滑动-逆冲构造共同控制的天然气水合物成藏模式。
The mud diapirs and the thrust-nappe structures are important shallow structures to control gas hydrate accumulation in Beikang basin.The mud diapirs mainly distributed in the south and north of the study area,the characteristics of them are different.The mud diapirs in the south of the study area always associated with the thrust-nappe structure,part of them pierced to the submarine as a mud volcanoes,formed a few of domal bodies near the submarine.The mud diapirs and the thrust-nappe structures can make a great influence on Gas Hydrate Accumulation.Firstly,they can improve the migration conditions,and then,the fracture associated with them provided good reservoir space to gas hydrate,at last,the mud diapirs(mud volcanoes)can change the press-temperature condition of the gas hydrate stability zone within a certain range.Finally,the author summarizes the gas hydrate accumulation pattern controlled by the mud diapirs and the thrust-nappe structures in Beikang basin.
作者
徐梦婕
匡增桂
何玉林
林霖
尚久靖
Xu Mengjie;Kuang Zenggui;He Yulin;Lin Lin;Shang Jiujing(MNR Key Laboratory of Marine Mineral Resource,Guangzhou Marine Geological Survey,Guangzhou 510075,China)
出处
《南海地质研究》
2016年第1期84-95,共12页
Gresearch of Eological South China Sea
基金
中国地质调査局项目(GZH2001100303,GZH201100305).
