Abstract
To mid-1973, carbonate rocks of Ordovician age in north Mississippi had produced 7,813 bbl of 35° gravity oil from one well and 123,752 MCF of gas from another. In spite of the poor results of exploration of Ordovician strata, large reservoirs may be present in these oil- and gas-bearing limestones and dolomites, and structural and stratigraphic conditions may favor commercially profitable accumulations of oil and gas. Porosity is found in fractured and vuggy dolomite, in sucrosic dolomite, in secondarily dolomitized limestone, in coquinoid or reef limestone, in oolitic limestone, and in chert residuum from post-Ordovician, Early Silurian, lixiviation.
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