形成大中型气田的地球化学条件

Geochemical Conditions of Forming Large-Middle Gas Fields

本文以四川盆地威远、卧龙河和中坝等大中型气田为例,进行了油气成藏的地球化学条件分析。认为丰富的气源供给,适宜的成气阶段,良好的成藏组合是大中型气田形成的必备条件,其中成气阶段和烃气保藏条件尤为重要。

Taking Weiyuan, Wolonghe and Zhongba large-middle gas fields etc. as examples, the writer anal- ysed the geochemical conditions of forming oil-gas reservoirs and considered that the necessary condi- tions of forming large-middle gas fields are abundant supply of gas source, suitable gas-forming stage and favorable combination of forming reservoir, and that the very important ones among them are the gas-forming stage and hydrocarbon-conserving conditions.