In this paper we present a model for calculating water saturations in clean, fine-grained, fractured rocks. The model, called the fracture/matrix (F/M) model, is used to calculate a composite porosity exponent, m, which is then used in Archie’s relationship to calculate water saturations. An application of the F/M model to wells located in S.E. New Mexico which penetrate the Bone Spring sands is presented.

Keywords:
conventional method, water saturation, log analysis, conductance, fracture, fracture porosity, interpretation technique, reservoir rock, porosity, conductivity
Subjects:
Hydraulic Fracturing, Reservoir Characterization, Formation Evaluation & Management, Unconventional and Complex Reservoirs, Open hole/cased hole log analysis, Naturally-fractured reservoirs
Copyright 1988, Society of Petroleum Engineers
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