吐哈与准噶尔盆地J煤系有机相及生气性研究

Organic Facies and Their Gas Generating Potentials of the Jurassic Coal Measures in Turpan Hami and Junggar Basins

详细划分了吐哈与准噶尔盆地 J煤系有机相 ,将本区泥岩有机相和煤相分别划出 4类 .对这些有机相样品进行了 Py- GC生气性实验 ,首次提出了 Co1,Co2 ,Cg1,Cg2 ,D11,D2 2 等反映烃源岩生气能力的重要参数 .结合荧光有机组分指数 ,将研究区各类泥质烃源岩和煤烃源岩分为 3类气源岩 ,改进和完善了气源岩有机岩石学 -有机地化评价体系 .通过对每一个有机相现阶段 (低熟阶段 )和远景 (成熟、过成熟阶段 )生气能力逐一评述 ,划出了本区有利生气相带 。

The organic facies of the Jurassic coal measures in the Turpan Hami and Junggar Basins were classified in detail. The mudstone organic facies and the coal facies were individually classified into 4 types. Based on the Py GC experiment of gas generating potentials of the samples, some important indexes, such as C o1 ,C o2 ,C g1 ,C g2 ,D 11 and D 22 were put forward to reflect the gas generating potentials of source rocks. According to the fluorescence maceral index (FMI), the clay and coal source rocks were classified into 3 types, improving and perfecting the organic petrology organic geochemistry evaluating system for gas source rocks. According to the evaluation of gas generation potential of each organic facies, both at present and in the future, the favorable gas generating belts were lined out. The results show that there is a coincident relationship between the favorable gas generating belts and the gas accumulating belts.