塔里木盆地三叠系暗色泥岩分布广、厚度大、有机碳和可溶有机质含量高。烃源岩可溶抽提物中含有很高的孕甾烷、升孕甾烷和丰富的长链三环二萜烷 ,说明三叠系烃源岩母质组成中含有丰富的低等水生生物成分 ,非常有利于油气的形成。三叠系烃源岩在塔里木盆地多数地区已成熟。油气源对比结果表明 ,塔里木盆地目前所产的原油和天然气中有相当一部分均与三叠系烃源岩有关 ,三叠系地层具有较高的生油气潜力。

Triassic black mudstones are extensively distribut ed in Tarim basin with great thickness and higher content of total organic matte r (TOC) and extractable organic matter (EOM). Abundance pregnanes and higher con centrations of tricyclic terpanes are also observed in extractable organic matte r (EOM) of Triassic source rocks. All of above characteristics show that organic  matters in Triassic source rocks of Tarim basin are rich in aquatic-life deriv ed organic material and Triassic source rocks are favorable for oil and gas gene ration. Triassic source rock organic matters are also mature in thermal maturity  in most parts of Tarim basin. The oil/gas and source rocks correlation studying  have proved that considerable amount of oil and natural gas produced in Tarim b asin are derived from Triassic source rocks. Triassic source rocks are in good c ondition with relatively higher potential for oil and gas generation.