摘要
长2油层组为鄂尔多斯盆地下寺湾地区主要的含油气层段之一,为确定长2油层组油气的成藏时期,采用流体包裹体测试技术和分析方法,利用包裹体的均一温度,对该地区长2油层组储层流体包裹体样品进行了系统研究.通过对流体包裹体特征的分析,应用流体包裹体均一温度的资料,结合相应沉积埋藏史、热史和生烃史,探讨了下寺湾地区油气的运聚成藏历史.下寺湾地区长2油层组砂岩储层中发育三类流体包裹体:盐水包裹体、含液态烃包裹体和液态烃包裹体.与烃类包裹体共生的盐水包裹体均一温度具有明显的单峰特征,主要分布在105～115℃.根据埋藏史和热演化史分析结果,最终确定鄂尔多斯盆地下寺湾地区长2油层组油藏为一期成藏,其成藏时间距今110～125 Ma,为早白垩世晚期.
Chang-2 formation of Xiasiwan area is a major petroleum reservoir. Using the homogeneous temperature of inclusion and with regards to the burial history of formation and the thermal evolution history of Ordos basin, a study on fluid inclusions was done systematicaly in order to determine the period of hydrocarbon accumulation in Xiasiwan area. The history of hydrocarbon migration and accumulation in Xiasiwan area was discussed based on the data of the fluid inclusion homogeneous temperature, burial history, thermal history and hydrocarbon generation analyses. There are mainly 3 types of fluid inclusions in sandstone reservoirs in Chang-2 formation of Xiasiwan area： brine inclusion, liquid hydrocarbon inclusion and liquid hydrocarbon-containing in- clusion. The homogenization temperatures of brine inclusion coexisting with organic inclusions are 105-115 ℃ on the basis of analysis of the burial history and thermal evolution history. It was ultimately determined that the time of hydrocarbon accumulation was of one phase in this area, and the age of accumulation was between 110 Ma and 125 Ma, which is nearly the late early cretaceous.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第5期30-35,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(41102083)
西安石油大学博士启动基金项目(YS29030504)
