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成岩矿物中捕获的油包裹体已经广泛应用到油气成藏过程约束研究之中,但对油包裹体均一温度的影响因素及其地质涵义还了解得不够清楚.主要运用热动力学模拟的方法,通过模拟黑油和挥发性油两种不同原油类型在不同温-压条件下捕获时油包裹体均一温度与捕获时温度之间的关系,发现油包裹体的均一温度受到油组分、捕获温度和压力等多种因素影响;利用同期盐水包裹体约束的温-压条件并结合单包裹体组分分析结果,反过来可以给出油包裹体均一温度以及与同期盐水包裹体均一温度差值地质解释,从而为获得较为准确的油气充注幕次划分和古流体压力热动力学模拟结果奠定基础.
The oil inclusions captured in diagenetic minerals have been widely used in the study of hydrocarbon accumulation process constraints, but the influence factors of homogenization temperature of oil inclusions and their geological implications are not well understood.Mainly using the method of thermodynamic simulation, By simulating the relationship between the homogenization temperature of oil inclusions and the temperature at the time of capture under different temperature-pressure conditions, the homogenization temperature of the oil inclusions was determined by the oil composition, the capture temperature Pressure and other factors. Based on the temperature-pressure conditions constrained by the brine inclusions and the analysis of single-component composition, the homogenization temperature of the oil inclusions and the uniform temperature difference with the salt inclusions in the same period can be given So as to lay a foundation for more accurate sub-division of oil and gas charge and thermo-dynamic simulation of paleo-fluid pressure.