断层与天然气水合物的关系

The Relations Between Faults and Gas Hydrates

天然气水合物与断层、碳酸盐岩、渗流和盐底辟等构造都有比较密切的关系。其中,断层一方面为深部气源向上运移提供良好的通道,使气体能够在合适的温压环境下聚集成藏。为水合物的形成创造良好的构造条件；另一方面,断层往往对水合物的赋存起到一定的破坏作用,因为它能够成为水合物分解逸出的通道,所以它在一定程度上可以揭示地层之下是否存在水合物。因此,研究断层与天然气水合物的关系,是了解海底水合物的历史变化、当今现状和发展规律的重要途径,是当今水合物开发研究工作中必须面对的新课题。

As we know, there are close relations among gas hydrates and faults, carbonate, seepage flow and salt diapirism. In this paper, the relations between faults and gas hydrates are analyzed. One side, faults which can be regarded as good passage for gases migration from deeper gases source to upper stratum, and then gases can be accumulated to deposit in the suitable temperature and pressure environment, so faults can be supported good condition for the form of gas hydrates. The other side, the gas hydrates deposit often were destructed by faults in some degrees, because they can be supported passage for the breakdown of gas hydrates, so it is a symbol of gas hydrates existence whether or not under the stratum. Therefore, to study the relations between faults and gas hydrates is important to know the history, now and feature of the gas hydrates, it is a new task for us to research the gas hydrates.