Abstract: Submarine fan channels,mainly deep-water gravity flow deposits,are generally characterized by diverse lithofacies types and poor correlation of porosity-permeability due to the complicated genetic mechanisms,which brings significant challenges to reservoir petrophysical modeling.Taking oilfield A in West Africa as an example,this paper proposes a new method for reservoir petrophyscial modeling of the submarine fan channels based on a comprehensive analysis of re-servoir features and their correlation with seismic attributes.This method features in "multi-facies control and multi-attributes collaboration".In contrast with the traditional facies-controlled modeling in which porosity modeling is simply controlled by sedimentary facies,this method first builds a reservoir facies model under the control of facies architecture model and then build porosity model under the control of the reservoir facies model.Given that the deep-water channel sandbodies show poor porosity-permeability correlation as a whole but good porosity-permeability correlation for different lithofacies,this method further supplements "lithofacies-control" in permeability modeling.Besides,this method also adds seismic-collaboration in the reservoir facies modeling in comparison with the common collaborative modeling.

Key words: reservoir petrophysical modeling, facies-controlled modeling, collaborative modeling, submarine fan channel, West Africa