Abstract
Summary A new pore-pressure prediction equation for carbonate formations was developed following the compressibility method previously known. The main goal of this research was motivated by the lack of specialized information needed to apply such a method. The resulting equation is a function of the differential stress and a porosity-relative constant that depends implicitly on carbonate-rock compressibilities. Two examples in carbonates from Mexico are presented to demonstrate the viability of the method in this paper. A “mixed model” was obtained to compute the total pore-pressure gradient, accounting for shale and carbonate rocks.
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