昆仑山垭口盆地天然气水合物形成条件研究  

Formation Conditions of Natural Gas Hydrates in Kunlun Mountain Pass Basin

作　　者：张金华[1,2] 魏伟[2] 魏兴华[2] 肖红平[2] 彭涌[2] 张巧珍[2] 王培[2] 

机构地区：[1]中国地质大学(北京)海洋学院,北京100083 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007

出　　处：《非常规油气》2016年第3期101-105,共5页Unconventional Oil & Gas

基　　金：中国石油科技管理部项目(2014A-4806)

摘　　要：昆仑山垭口盆地具有良好的天然气水合物的形成条件,钻探显示,该盆地具有天然气水合物赋存特征。在该盆地构造和沉积分析的基础上,结合天然气水合物油气系统理论探讨了昆仑山垭口盆地天然气水合物成藏条件。通过该盆地冻土厚度、地温条件、气源和气体组分条件、运移及储层条件等方面分析,认为昆仑山垭口盆地具备形成天然气水合物较好的温度和压力条件,高含量的CO_2等气体组分有利于天然气水合物的形成。模拟显示,昆仑山垭口盆地冻土区天然气水合物稳定带厚度最大可达450m。发育的断裂及裂缝,以及砂岩和页岩的互层组合为天然气水合物的储存提供了良好的空间。Kunlun Mountain Pass Basin holds good conditions for the formation of natural gas hydrate. Drilling results indicated the presence traits of natural gas hydrate in the basin. Based on the tectonics and deposition condition analysis,and combined with the natural gas hydrate petroleum system theory,we discussed the natural gas hydrate reservoir conditions in the basin. Through analyzing permafrost thickness and ground temperature conditions,the gas source and gas component conditions,migration and reservoir conditions,etc.,we believe that the basin has good temperature and pressure conditions for gas hydrates formation,and high CO_2 content in the area is more conducive to the formation of gas hydrates. Numerical simulation reveals that the maximum value of gas hydrate stability zone thickness can up to about 450 meters in the area. The formations with well-developed cracks and inter-bedded sandstone-shale provide good reservoir space for gas hydrates.

关 键 词：天然气水合物 成藏条件 昆仑山垭口盆地 水合物油气系统 

分 类 号：P539.3[天文地球—古生物学与地层学]