The University field, East Baton Rouge Parish, Louisiana, is a deep domal type structure with minor faulting.

Production from the field is obtained from Miocene sands. The main and most important oil-producing sand is the 6,400-foot sand. Other producing sands are the 4,300-foot gas sand, the 6,700-foot oil sand, and the 7,100-foot gas sand Aside from these four producing sands, there are three potentially productive sands: the 4,100-foot and 6,200-foot sands in which oil has been cored, and the 6,900-foot sand containing gas As yet, no attempt has been made to produce from the latter sands.

This field is of particular interest because of the presence of a greater number of stratigraphic traps (oil and gas reservoirs) than are known in any other field of the Gulf Coast except from piercement-type domes.

Accumulation in the 4,300-foot sand, which is among the producing sands, and in the 4,100-foot sand and the 6,200-foot sand of the potentially productive sands, is controlled by stratigraphic factors which created traps.

Individual contour maps on these three sands delineate their respective lines of pinch-out and, with the assistance of cross sections of the sands in the field, provide an accurate picture of the stratigraphic traps which they form. An hypothesized explanation is given, based on the assumption of erratic contemporaneous deposition of sediments from different sources in the same area.