松辽盆地扶余油田泉四段沉积微相研究

Sedimentary microfacies of the fourth member of Quantou Formation in Fuyu Oilfield, southern Songliao Basin

以岩心和测井资料为基础,从岩石类型、泥岩颜色、粒度以及沉积构造等特征入手,对松辽盆地南部扶余油田泉四段4个砂岩组的沉积微相展布特征及沉积模式进行了系统研究。结果表明:研究区为曲流河—三角洲沉积体系,包括三角洲分流平原和三角洲前缘2个沉积亚相,发育分流河道、天然堤及决口扇等12种沉积微相。根据不同微相的测井相特征,研究了小层沉积微相平面分布规律,并建立了浅水三角洲沉积模式,研究了其沉积演化特征,为研究区的剩余油挖潜提供了地质依据。

Based on core and logging data, this paper systemically studied the distribution of sedimentary microfacies and sedimentary model of the fourth member of Quantou Formation in Fuyu Oilfield of southern Songliao Basin through analyzing the rock type, color of mudstone, grain size and sedimentary structure. The result shows that the study area developed meandering river-delta plain, including two types of subfacies and 12 types of microfacies. According to the logging characteristics of different microfacies, classified the plane distribution features of microfacies, established sedimentary model of shallow water deltas, and analyzed the characteristics of sedimentary evolution. This study can provide a reliable base for potentials tapping of remaining oil in Fuyu Oilfield.