Prototype geological model of distributary channel based on the high density well pattern

Abstract

The western part of the central zone lies in the middle of the Saertu anticline structure. It can be divided into 77 sedimentary units, with the permeability ranging from less than 10 mD to more than 1000 mD. Diversity of plane sand body morphology, phase change frequently. Based on the high density logging data in the west of the central district, the prototype geological model of distributary channel sand body is studied, and 6 sedimentary models of distributary channel in 3 sedimentary environments are established. The Upper plain was mainly developed: composite type. The lower plain is mainly developed: the split-band type and the interwoven network type; the delta front is furcated dendritic, single continuous and discontinuous type. Geometric parameters of different distributary channels are obviously affected by the sedimentary environment, and the scale, curvature and width-thickness ratio of distributary channels along the sedimentary direction all decrease from large to small.