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通过对库车坳陷１７个含油、气储集岩样品自由态、束缚态油和气组分及油、气包裹体的ＧＣ和ＧＣ－ＭＳ分析，结果表明油、气包裹体分子地球化学特征明显不同于自由态．油、气组分（现今油、气组分）．和现今油、气组分相比，油、气包裹体具有较高的Ｐｒ／ｎＣ_(１７)和Ｐｈ／ｎＣ_(１８)比值；较低的Ｐｒ／Ｐｈ、藿烷／甾烷、Ｃ_(３０)重排藿烷／Ｃ_(３０)藿烷、Ｔｓ／Ｔｍ比值和Ｃ_(２９)Ｔ_ｓ萜烷相对含量，较高的成熟度（即Ｃ_(２９)甾烷２０Ｓ／（２０Ｒ＋２０Ｓ）比值较高），并且和塔北、塔中的海相原油具有很好的对比性．束缚态油、气组分的地球化学特征则介于油、气包裹体和现今油、气组分之间．上述结果表明，库车坳陷含油、气储集岩具有两期油、气注入过程，早期注入的油、气组分来自下古生界（寒武－奥陶系）海相烃源岩，而晚期注入的油、气组分来自中生界陆相烃源岩，以陆相油、气组分为主．
Based on GC and GC-MS analysis of free and bound oil and gas components and oil and gas inclusions of 17 oil-bearing gas reservoirs in the Kuqa Depression, the results show that the molecular geochemical characteristics of oil and gas inclusions are obvious Unlike the free state. Oil, gas components (present oil, gas components). Compared with current oil and gas compositions, oil and gas inclusions have higher Pr / nC_ (17) and Ph / nC_ (18) ratios; lower Pr / Ph and hopane / sterane and C_ ) Rearranged hopane / C_ (30) hopane, Ts / Tm ratio and relative content of C_ (29) T_s parapara and higher maturity (ie, the ratio of C 29 sterane 20S / (20R + 20S) , And tower north, the tower of the marine oil has very good contrast. Bound state oil, gas composition of the geochemical characteristics of oil and gas inclusions and present oil and gas components between. The above results show that the oil and gas reservoirs in the Kuqa Depression have two oil and gas injection processes, and the oil and gas components injected from the earlier stage originate from the Lower Paleozoic (Cambrian-Ordovician) marine source rocks, The oil and gas components injected lately come from the Mesozoic continental facies source rocks, mainly continental oil and gas components.