我国南海天然气水合物资源潜力分析

Resource potential analysis of natural gas hydrate in South China Sea

天然气水合物是一种潜在能源,资源量大,我国天然气水合物以南海分布居多.本文分析了影响天然气水合物形成的构造沉积、烃源、温度与压力等因素,并以墨西哥湾和布莱克海台天然气水合物藏为例进行了分析.基于天然气水合物形成的影响因素,综合考虑南海海域的构造演化及油气地质条件,认为南海的构造及气源条件有利于天然气水合物的形成,同时进一步认为南海地区水合物成藏一级远景区包括台西南盆地、东沙群岛、西沙海槽—琼东南盆地和北康盆地,次级远景区包括中建南盆地和万安盆地等.并针对南海天然气水合物勘探及研究面临的挑战,提出了建议.

Gas hydrate is a kind of potential energy resource,and the resources are huge.South China Sea is the principal region where natural gas hydrates are distributed in China.This paper analyzes the influencing factors of forming gas hydrate,such as tectonic deposition,hydrocarbon source,temperature and pressure and some other factors,taking the Gulf of Mexico and Blake Ridge gas hydrate reservoirs for example.Then based on the influencing factors of forming hydrate,taking South China Sea tectonic evolution and petroleum geological conditions into account,this paper thinks that the structural and gas source condition in South China Sea are beneficial to the formation of natural gas hydrate.Meanwhile,this paper further regards Southwest Taiwan basin,Dongsha Islands,Xisha Trough – Qiong-dongnan basin and Beikang basin as the first-grade prospective area of gas hydrate and the Zhongjiannan basin and Wanan basin as subprime prospective area of gas hydrate in the South China Sea.According to the challenge for the exploration and research of the South China Sea natural gas hydrate,this paper puts forward some suggestions.