影响油包裹体均一温度的主要控制因素及其地质涵义  

Main Controlling Factors on Oil Inclusion Homogenization Temperatures and Their Geological Significance

作　　者：平宏伟[1] 陈红汉[1,2] 

机构地区：[1]中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球科学（中国地质大学学报）》2011年第1期131-138,共8页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目(No.40372068)

摘　　要：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.Petroleum inclusions trapped in diagenetic minerals have been extensively applied to studies of constraint hydrocarbon migration and accumulation,but the effects on petroleum inclusion homogenization temperatures and their geological implications have not been completely understood. In this paper,a thermodynamic modeling method was employed,and two types of black oil and volatile oil were used to simulate their homogenization temperatures and to establish the homogenization temperature relationship between petroleum inclusions and their coeval aqueous inclusions under different P-T conditions. It is concluded that all the petroleum composition,trapped temperature and pressure have influence on the petroleum inclusion homogenization temperature. In contrast,if the trapped P-T and petroleum composition of single inclusion are known,the petroleum inclusion homogenization temperature and the difference between petroleum inclusions and their coeval aqueous inclusions can give geological meanings,which can play a great role on hydrocarbon charging episodes and paleofluid pressure modeling.

关 键 词：油包裹体 均一温度 PVT组分 石油地质 

分 类 号：P618[天文地球—矿床学]