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通过有压力的黄金管封闭体系生烃模拟实验和GC IRMS测定,结合GOR IsotopeKinetics专用软件,求取了塔里木盆地库车坳陷三叠系—侏罗系烃源岩生成甲烷的碳同位素动力学参数。结合地质背景,探讨了克拉2气田天然气的成因。克拉2气田天然气主要来源于早中侏罗世煤系烃源岩,属阶段捕获气,为- 5Ma以来的天然气聚集,对应成熟度范围Ro为1.3%～2 .5 %。在此基础上,建立了克拉2气田天然气运聚成藏动力学模式,从而为天然气定量评价和动态研究提供了新思路
The carbon isotope kinetic parameters of methane from the Triassic-Jurassic source rocks in the Kuqa Depression of Tarim Basin were obtained through hydrocarbon generation simulation and GC-IRMS measurement under pressured gold tube closed system and GOR IsotopeKinetics software. . Based on the geological background, the origin of natural gas in Kela-2 gas field is discussed. The natural gas in the Kela-2 gas field is mainly derived from the early-middle Jurassic coal-measure source rocks, and belongs to the stage of capture gas, which is the accumulation of natural gas after -5Ma. The corresponding maturity range Ro is 1.3% -2.5%. On this basis, the kinetic model of natural gas migration and accumulation in the Kela-2 gas field was established, which provided a new idea for the quantitative evaluation and dynamic study of natural gas