Sedimentary Characteristics in the 3rd Member of Weizhou Formation in Weizhou Oilfield

In view of the lack of well data in Weizhou oilfield, this paper starts from the previous results and literature investigations to determine the provenance area and main sedimentary environment in the 3rd Member of Weizhou Formation. Secondly, through the latest well and seismic data of 4 wells drilled in oilfield area, two sub facies of braided river delta plain, braided river delta front and corresponding 7 sedimentary microfacies are divided. Finally, on the basis of the direction of the source, combined with the wave impedance attribute extraction, the vertical and horizontal distribution characteristics of the four sets in the 3rd Member of Weizhou Formation can also be depicted. It will lay a foundation for further geological research.