Problems encountered in petroleum exploration and exploitation of the Chester and Upper Meramec of the Oklahoma Panhandle and parts of the Texas Panhandle are many and varied. Lateral variations of lithologic units, accompanied with porosity and permeability changes largely determines commercial accumulations of oil or gas in the Chester. Positive structural position, at present, probably determines St. Louis accumulation although local lateral lithologic changes may occur to form separate reservoirs on the same structure.

Carbonate reservoirs present unique problems in well completion, and the well completion methods vary as greatly as the individuals who do the work.

Producing carbonates must reach their optimum facility in regard to capacity and pressure so that excessive production will not ruin the well.

A low initial potential or low rate of production does not necessarily mean a small reservoir.

IRA D. TAYLOR

Ira D. Taylor, B.S., 1950, M.A., 1952, Indiana University.

Employed by Indiana State Geological Survey, Pure Oil Company and has been with the Texas Panhandle Sample Log Service since 1955.

Member of AAPG, G.S.A. and Panhandle Geological Society.

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