银额盆地石炭-二叠系包裹体成分特征对油气运移的讨论  

Discussion on Hydrocarbon Migration Based on Characteristics of Inclusions in CarboniferousPermian of Yin'e Basin

作　　者：韩伟[1,2] 任战利[1] 卢进才 魏建设 张云鹏 

机构地区：[1]西北大学大陆动力学国家重点实验室/地质学系,西安710069 [2]西安地质调查中心,西安710054

出　　处：《吉林大学学报（地球科学版）》2015年第5期1342-1351,共10页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(41202104);中国地质调查局国土资源大调查项目(1212010733506)

摘　　要：包裹体成分特征反映了油气的演化程度和运移期次。本文对银额盆地石炭-二叠系4组地层砂岩中的包裹体开展研究,发现研究区包裹体多≤5μm,呈串珠状分布于石英颗粒裂隙中,以气液两相的状态存在。根据包裹体中甲烷等有机组分的含量及其相互关系对研究区油气运移过程展开研究,认为二叠系至少经历过较高温较高盐度、较低温低盐度等两期油气运移;结合烃源岩热演化史研究,可分别对应二叠纪中期-二叠纪末和白垩纪早-晚期两期油气运移过程。The compositional characteristics of inclusions show the evolution and migration stages of oil and gas.Studying on the inclusions in the sandstone collected from Carboniferous-Permian of Yin＇e basin,we find that most of the inclusions are≤ 5μm;and beaded gas-liquid inclusions distribute in the fracture of quartz grains.Based on the relationship of methane and organic components,we focus on the hydrocarbon migration process in the study area,and find out that Carboniferous-Permian in the study area experienced two hydrocarbon migration processes：high temperature and salinity and low temperature and salinity.Combined with the hydrocarbon source rock thermal evolution history,we find two corresponding hydrocarbon migrations：one occurred in the Middle-Late of Permian,and the other one in Late Cretaceous.

关 键 词：银额盆地 石炭-二叠系 包裹体成分 油气运移 

分 类 号：P613.8[天文地球—矿床学]