由沥青产状及地球化学特征分析碳酸盐岩油藏的成藏期次──以塔中16井区为例

应用荧光显微镜技术,结合岩石学和地球化学特征,根据沥青产状与其围岩成岩演化的关系,可划分出油气成藏期次及大致成藏时间。通过对塔中16井区奥陶系碳酸盐岩油藏的分析认为：该油藏具两次成藏的特征,第一次成藏发生在海西运动期,第二次成藏发生在喜马拉雅运动期。早期油气源自寒武系至下奥陶统,晚期油气源自中-上奥陶统。

ANALYSIS OF RESERVOIR-FORMING STAGES OF CARBONATE RESERVOIR FROM OCCURRENCE AND GEOCHEMISTRY OF ASPHALT-An Example from Tazhong16 Well Area

Based on the relation between the occurrence of asphalt and diagensis of surmunding rock, along with its petrology and geochendsny, reservoir-forming stages and approximate time can be determined by applying fluorescence microscope. Case study over Oulovician carbonate reservoir in Tazhong16 well area showed that it formed in two periods(Hercynian and Himalayan period in subsequent order). The oil (gas) formed in early period originated from Cambrian-Lower Ordovician, while one in later period sourced from Middle-Upper Ordovician.