精细油藏描述中的沉积微相研究——以吉林油田大208区黑帝庙油层为例

Study on sedimentary microfacies in fine reservoir description——taking Heidimiao oil pay at 208 Block,Jilin oil field as an example

以吉林油田大208区黑帝庙油层为例,从岩心、测井等资料入手,通过各种相标志的识别,并结合区域地质背景,认为该区主要发育曲流河三角洲前缘沉积,其中水下分流河道、河口坝、远砂坝、席状砂、水下溢岸砂等5种微相较为发育。在此基础上,通过横向对比,勾绘了不同小层的沉积微相平面分布图,从而在宏观上展现出该区沉积微相的展布及其演化特征,为油藏的勘探开发提供了重要的地质依据。

The microfacies of Heidimiao oil pay at 208 Block of Jilin oilfield are studied in details on the basis of core and logging data,various facies marks,and regional geologic setting. It is suggested that there are five main kinds of sedimentary microfacies in the area:subaqueous distributary channel,mouth bar,distal bar,sheet sand and overbank sand.After the lateral correlation,the horizontal distribution of sedimentary microfacies of different member is drawn,rendering the characteristics of the distribution and evolution of sedimentary microfacies at the area.