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In carbonate systems, dolomite often forms the best reservoirs. The dolomitization of carbonate sediments and rocks increases crystal size and pore throat size, and decreases pore roughness. Without exception, the combination of these increases the permeability of the carbonate. In this way, dolomitization “makes” the reservoir, with dolomite serving as the reservoir and the surrounding limestone forming the seal. Porosity in the dolomitic facies is enhanced in such cases not so much as a result of dolomitization, but through leaching of skeletal grains or evaporites, or by fracturing.

Many environments of dolomitization have been identified. Some result in unique...

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