摘要
通过对川中与川西北主要气田的天然气组分、天然气运移指标等资料的详细分析,发现川中地区须家河组天然气主要来自内部的次级生烃洼陷,其中须家河组二、四、六段气源分别为一、三、五段烃源岩,且不同含气层段之间很少有气源窜通的现象。最后指出即使生气强度小于20×108m3/km2,但只要紧邻生气洼陷,储层物性就相对较好,又有良好的构造背景,也能形成大中型气田。
An intensive analysis of the characteristics of main gas fields in central and northwest Sichuan basin such as the components and migration indicators of natural gas shows that natural gas of Xujiahe Formation in central Sichuan basin was mainly generated from source beds in the hydrocarbon generation sags,and the natural gas of T3x2,T3x4,T3x6 was respectively generated from hydrocarbon source rocks of T3x1,T3x3,T3x5.It is pointed out that even if the gas generation intensity of hydrocarbon source rocks in the hydrocarbon generation sag is lower than 20×108m3/km2,the reservoir which has good physical properties and beneficial tectonic background and is close to the hydrocarbon generation sag could also form a large or medium sized gas field.
出处
《地质通报》
CAS
CSCD
北大核心
2011年第10期1608-1613,共6页
Geological Bulletin of China
关键词
川中地区
须家河组
天然气组分
天然气运移
气源
central Sichuan Basin
Xujiahe Formation
natural gas components content
natural gas migration
gas source
