Resistivity indication of reservoir flow potential in carbonate rocks: a case study of Little Cedar Creek Field, onshore Alabama

摘要

Cementation factor "m" in Archie's law has been found to be related to carbonate pore structure and explains the electrical resistivity variations at a given porosity. In highly heterogeneous carbonates, understanding the variation of the cementation factor in different pore systems is important for accurate estimation of both hydrocarbon saturation and permeability. In this report, cementation factor derived from resistivity and density logs acquired in a carbonate formation onshore Alabama is investigated to relate its large variations to diagenetically generated high permeable zones. Detailed petrophysical analysis of over 8 wells reveals that "m" is a good indicator of pore structure. From log analysis, we find that the dominant pore type is dominated by micropores, where l