The West Hewitt field is a north west-trending anticline lying just off the west flank of the larger Hewitt structure. The surface rocks are Permian in age, whereas the producing horizons consist of Deese (late Pennsylvanian) beds. The main producing sandstones, long known as the 1st, 2d, and 3d Hewitt sandstones, are now believed to be correlated with the Chubbee, Norris and Lone Grove sandstones, respectively, of the Lone Grove field to the southeast.
Major unconformities are present at the base of the Pontotoc beds and at the base of the Deese formation, with less important ones being present within the Deese. Faulting has been minor in the field, and neither the unconformities nor the faults have had appreciable effect upon the accumulation of the oil.
The prospects of pre-Pennsylvanian production are slight, as wells in both the West Hewitt field and the Hewitt field have penetrated all or part of the Simpson section, and show a complete lack of sandstone development. Other known pre-Pennsylvanian productive beds have proved to be barren of oil in this area.
The total production of the field through 1952 was 11,120,263 barrels, with the maximum monthly production having been reached in the latter part of 1941. Per-well/per-day production had decreased from 53 barrels in December of 1941 to 6.5 barrels in December of 1952. The per-acre recovery through 1952 has been estimated at approximately 23,000 barrels.