Definitions for "Stratigraphic trap"
A porous section of rock surrounded by nonporous layers, holding oil or gas. They are usually very difficult to locate, although oilmen believe that most of the oil yet to be discovered will be found in these traps.
A type of reservoir capable of holding oil or gas, formed by a change in the characteristics of the formation - loss of porosity and permeability, or a break in its continuity - which forms the trap or reservoir.
A type of petroleum trap which results from variations in the lithology of the reservoir rock, which cause a termination of the reservoir, usually on the up-dip extension.