井楼油田北区细分沉积微相研究

井楼油田北区物源来源存在争议,导致对砂体分布的认识不清,限制了油田高效开发。通过岩心、测井、分析化验等资料综合研究,认为井楼油田北区物源来自北东方向的古城三角洲。细分了储层沉积微相,研究区主要属于三角洲前缘末梢沉积,发育水下分流河道、河口坝、席状砂、河道间以及湖泥五个微相。结合砂体以及沉积微相分布规律,总结了研究区沉积相模式。并在沉积相模式指导下,对储层微相及砂体的平面分布规律进行了研究,确定了砂体在空间上分布特征及规律,研究结果对油田开发具有重要指导意义。

Study on sedimentary microfacies in the north area of Jinglou oilfield

The sediment source in the north area of Jinglou oilfield is not obvious,which causes the indistinct of the distribution of sand body and restricts the development of the oilfield. Through comprehensive analysis on core data,logging data and chemical experiment data,the sediment source in the north area of Jinglou oilfield is considered to come from Gucheng delta which lies to the northeast of Jinglou oilfield. The research area is at the end of delta front and there are five main kinds of sedimentary microfacies,distributary channel,mouth bar,sand sheet,interchannel and lake mud. Combining the distribution of the sand and the sedimentary microfacies,the sedimentary pattern of the research area has been established.According to the sedimentary pattern,the plane distribution of the reservoir microfacies and sand are researched,which is of significance for the development of oilfield.