四川盆地须家河组煤系烃源岩沉积发育模式探讨

Sedimentary Development Model of Coal-measure Source Rock in Sichuan Basin

煤层气作为新兴的能源矿种,具有巨大的资源潜力,有着极大的经济价值、社会效益和环境效应。近年来,我国陆续发现了许多大气田,这些气田均为煤成气田。四川盆地是中国陆上最重要的天然气产区之一,勘探证实,须家河组天然气主要源于自身煤系地层。文章通过分析不同构造区域沉积相带的变化和有机质富集的关系,结合四川盆地须家河组煤系烃源岩分布和发育特点,总结了四川盆地须家河组煤系烃源岩沉积发育模式,对探索前陆盆地煤成气(烃)地质条件及油气分布规律,具有重要的理论意义和实际意义。

The Sichuan basin is one of the most important gases producing area onshore in China. It is explored that the gas in Xujiahe for- marion is mainly from the coal measure strata itself. By analyzing the relationship between the changes in sedimentary faces zone and the or- ganic- rich sediments in different tectonic area, combined with distribution and the development characteristics of coal measure source rocks, the paper discussed the sedimentary development pattern of the coal measure source rocks of Xujiahe formation in Sichuan basin, which is useful for us to explore the oil and gas in the Foreland Badin.