中文摘要：

试验性的数据由 Rock-Eval 热分解让步了， kerogen 原子 H/C ，从 Tarim 盆的海洋的寒武纪奥陶纪的来源岩石上的 Py-GC 和金试管的封上的热模拟表明为天然气产生或为水兵的煤气的产生的截止时间的成熟的上面的限制打字我和 II kerogens 等于3.0% vitrinite 反射( R o )；当为类型 III kerogens 的煤气的产生的截止时间典型地象 10% R o 一样象煤一样高时。因此，不同有机物为煤气的产生有显然不同的最大的成熟。由 kerogen 元素的集体平衡的计算看了那什么时候 R o >1.5% ，为海洋的类型 II kerogen 的煤气的产生的最大的数量是不到 185 m3/t TOC，为不到 30% 它的全部的烃的财务生产潜力；什么时候 R o >2.0% ，它成为 110 m3/t TOC，不到 20% 全部的烃生产潜力。Rock-Eval 获得的煤气的生产潜力的数量仅仅在由在一样的热进化阶段的 kerogen 元素的集体平衡的十分之一计算价值附近，当由 Py-GC 和金试管的封上模拟的那些在上述二之间是干涉的时。因此，在超过1.3% R o 阶段的煤气的生产潜力的最大可能在 6090 m3/t TOC 附近 Rock-Eval 获得的煤气的产生的数量是煤气的生产潜力的最小，当那由 kerogen 元素的集体平衡的计算是煤气的产生的实际数量不应该超过的最大值时。

英文摘要：

The experimental data yielded by Rock-Eval pyrolysis, kerogen atomic H/C, Py-GC and gold-tube sealing thermal simulation on the marine Cambrian-Ordovician source rock from the Tarim Basin revealed that the upper limit of maturity for natural gas generation or the ＂deadline of gas generation＂ for marine types Ⅰ and II kerogens is equal to 3.0% of vitrinite reflectance （Ro）; while the ＂deadline of gas generation＂ for type Ⅲ kerogens typically like coals is as high as 10% Ro. Thus, different organic matter has obviously different utmost maturities for gas generation. The mass-balance calculation by kerogen elements showed that when Ro〉1.5%, the utmost amount of gas generation for the marine type II kerogen is less than 185 m^3/t TOC, accounting for less than 30% of its total hydrocarbon generative potential; when Ro〉2.0%, it becomes 110 m^3/t TOC, less than 20% of the total hydrocarbon generative potential. The amount of the gas generative potential obtained by Rock-Eval is only around one tenth of the calculated value by the mass balance of kerogen elements at the same thermal evolutionary stage, while those by Py-GC and gold-tube sealing simulation are intervenient between the above two. The utmost of gas generative potential at the over 1.3% Ro stage is around 60--90 m3/t TOC, therefore, the amount of gas generation obtained by Rock-Eval is the minimum of gas generative potential, while that by the mass-balance calculation of kerogen elements is the maximum that the actual amount of gas generation should not exceed.