Abstract
One of the major shortcomings of many geologic models in attempting to characterize reservoirs is the uncertainty of permeability estimates. This uncertainty has been especially true in the offshore Gulf of Mexico where the cost of acquiring data is high. Most fields have no conventional core data; more often than not the geologist or petrophysicist has only wireline logs, occasionally supplemented by sidewall core data, to use in describing the reservoir. Conventional core data from 11 wells, taken in various parts of the Gulf of Mexico and from different depositional environments, were examined to develop a better correlation of porosity to permeability with rocks of different grain size and shaliness. Results from this study would allow an analyst without conventional core data to estimate permeability using porosity and grain size from sidewall core data.
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