摘要
通过对松辽盆地东部天然气中稀有气体及二氧化碳同位素组成的测试,探讨了天然气组分中氦和二氧化碳的成因及其地质意义,并对该区天然气气源岩年龄进行了估算。研究表明,该区天然气中壳源氦占绝对优势,大部分天然气中氦的含量达到了工业开采价值,可以形成氦的气藏。天然气气源岩年龄分别为早白垩世和早—中侏罗世,大部分天然气中的二氧化碳为有机成因。另外,该区的大地热流值相对偏低,说明在松辽盆地下部上地幔整体隆起幅度较高,中、新生代构造活动强,岩浆活动强烈的情况下,该区的构造活动相对较弱,岩浆活动不强烈。
Based on tests of isotope composition of carbon dioxide and rare gas in natural gas in the eastern Songliao Basin, the origin of carbon dioxide and helium and their geological significance are discussed and the age of the gas source rocks is calculated in the study area. The natural gas in the study area is dominated by helium sourced from the crust and the contents of helium in most natural gas reservoirs reach the standard of commercial production, thus these natural gas reservoirs can be developed as helium reservoirs. The ages of gas source rocks are Early Cretaceous and Early-Middle Jurassic respectively, and the carbon dioxide in most of the natural gas is organic type. In addition, the value of geothermal heat flow is relatively low in the study area, indicating relatively high amplitude of overall uplift of the upper mantle in deep Songliao Basin. In contrast to the background of strong tectonic action and strong magnetic activity in Meso-cenozoic, both the tectonic action and magnetic activity were weak in the study area.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2006年第10期24-26,41,共4页
Natural Gas Industry
关键词
稀有气体
二氧化碳
成因
气源岩
大地热流
松辽盆地
双城-太平川地区
rare gas, genesis of carbon dioxide, gas source rock, geothermal heat flow, Songliao Basin, Shuangcheng-Taipingchuan area
