The Study of the Sedimentary Microfacies of Single Sand-body in High Water-cut Oilfield:Taking PI Oil Bearing Formation of 2-North of Sabei Development Area as an Example

According to the analysis of cores and logging data of PI oil-bearing formation of 2-north of Sa-bei development area,it is held that in the oil-bearing formation is developed distributary channel microfacies,abandoned channel microfacies,nature levee microfacies,sheet sand microfacies in the sedimentary setting of river-delta.The special distribution law of the sandbodies is understood according to the division and correlation of depositional time unit,the establishment of logging sedimentary microfacies model and the study of sedimentary microfacies,which supplies important geological basis for the prediction of the remaining oil and the adjustment of the development plan of the oilfield.