HSS油田H1储层测井沉积微相研究

Sedimentary Microfacies of H1 Formation in HSS Oilfield for Well Logging

在充分利用和分析岩心、录井、分析化验、测井等多种资料的基础上,利用自然电位、自然伽马、电阻率和声波时差等测井曲线的形态、幅度等特征,建立了其与沉积微相之间的对应关系,并对不同沉积微相的测井曲线形态进行描述,从单井分析、剖面对比、平面展布3个层次对H1储层沉积微相进行了研究。研究表明,HSS油田含油层系为河流三角洲沉积体系,主要发育三角洲前缘和滨浅湖亚相。三角洲前缘水下分流河道的测井曲线形态多为箱形、钟形,河口坝的测井曲线形态多为倒雪松形,前缘席状砂的测井曲线多为齿状,滨浅湖测井曲线多为齿状或指状。

Based on the analysis of core,mud log,Inspection,well logging and other information,the relationship has been established between well logging curve and the sedimentary microfacies by using the self-potential,natural gamma,resistivity and acoustic logging.The type and characteristics of well logging curve shape in different sedimentary microfacies also have been described.Microfacies of the H1 Formation have been researched from three different level of single well,section correlation and planar distribution.The results show that oil-bearing layers of the HSS oilfield are river-delta depositional system,mainly including of delta front and shoreward lake sub-facies.The shapes of well logging curves corresponding to subaquatic distributary channel show as cylinder or bell-shape,corresponding to mouth bar as reversed cedar shape,to front sheet sand mostly as dentate shape,and to shore-shallow lake as dentate or finger-like shape.