A New Method for Sedimentary Microfacies Analysis Named MVF

This paper proposes a new method for predicting sedimentary microfacies named MVF (Microfacies Versus Frequencies) that means the relationship between the microfacies and tuning frequencies. The method is based on the logging interpretation, electrofacies analysis and spectral decomposition, combined with the crossplot analysis to do RGB geologically. Firstly the tuning frequencies were calculated by Discrete Fourier Transform (DFT) and Maximum Entropy Method (MEM), and then the relationship TVF (Thickness Versus Frequencies) was established. Secondly by the application of electrofacies considering the geological background, the relationship MVT (Microfacies Versus Thickness) was obtained. At last, we use crossplot technique which integrates microfacies, reservoir thickness and the tuning frequencies to study MVF to guide the selection of fusion frequencies for RGB. It is geologically reasonable for predicting the sedimentary microfacies. The examples for meandering river microfacies are predicted clearly.