Traps with leaky seals or reduced seal capacity may still maintain an economic column of petroleum. Partially leaked traps are characterized by a zone of residual petroleum saturation thicker than the transition zone predicted by [[capillary pressure]] tests. Shows in traps that have leaked are similar to those in spilled traps. Paleofluid contacts are usually flat, not tilted like spilled traps. | Traps with leaky seals or reduced seal capacity may still maintain an economic column of petroleum. Partially leaked traps are characterized by a zone of residual petroleum saturation thicker than the transition zone predicted by [[capillary pressure]] tests. Shows in traps that have leaked are similar to those in spilled traps. Paleofluid contacts are usually flat, not tilted like spilled traps. |