与火山-热液作用有关的海洋天然气水合物  

MARINE GAS HYDRATE RELATED TO VOLCANO-HYDROTHERMALISM

作　　者：赵洪伟[1] 龚建明[2] 陈建文[2] 李荣柱 

机构地区：[1]吉林大学 [2]青岛海洋地质研究所 [3]韩国资源研究院,韩国大田305350

出　　处：《石油实验地质》2005年第4期395-398,403,共5页Petroleum Geology & Experiment

基　　金：国家重点基础研究发展规划项目(G20000467)。

摘　　要：天然气水合物中烃类主要有生物成因和热解成因,然而随着水合物勘探开发的不断深入,分布于洋底、洋陆过渡带或拉张裂谷区与火山-热液作用有关的天然气水合物的发现则表明,海洋天然气水合物很可能存在第三种类型:无机成因天然气水合物.实验模拟表明,洋底岩石蛇纹石化可生成无机成因的天然气水合物,实际中我们在缺少沉积物的洋底和沉积物有机碳含量低(＜0.5%～1.0%)的大陆边缘发现了与火山-热液有关的天然气水合物.因此,今后天然气水合物勘探开发中应特别重视寻找与火山-热液有关的天然气水合物.Hydrocarbon in gas hydrate mainly includes biogenic and thermogenic gases. However, with increasing understandings of gas hydrate, new evidences are coming to light that there exists inorganic gas hydrate related with volcano-hydrothermalism, which is discovered in ocean floor, subduction zone or extensional valley. Field investigations and laboratory simulation have manifested that, seabed serpentinization could generate inorganic gases. In fact, we have found gas hydrate related with volcano-hydrothermalism whose sediments have thin thickness and low organic carbon quantity. Therefore, inorganic gas hydrae deposits should be paid attention to in the future.

关 键 词：蛇纹石化 火山-热液 无机合成 天然气水合物 

分 类 号：TE122.1[石油与天然气工程—油气勘探]