The Shale Gouge Ratio (SGR) is a geologic parameter used to evaluate the potential for faulting and the associated rock mechanics in petroleum reservoirs. It quantitatively assesses the influence of shale layers within a rock sequence on the stability and behavior of faults and fractures. The SGR is defined as the ratio of the amount of shale present in a fault zone compared to the total amount of rock (including both the shale and non-shale components) that is involved in the faulting process.
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