Changes

* Changes in the [[trap]]ping geometry

* Changes in the [[trap]]ping geometry

* Changes in the fluid contact due to [[hydrodynamics]]

* Changes in the [[Fluid contacts|fluid contact]] due to [[hydrodynamics]]

* Reduction in reservoir volume due to [[postaccumulation cementation]]

* Reduction in reservoir volume due to [[postaccumulation cementation]]

Petroleum loss across faults is considered spillage, not leakage, because faults are part of the trapping geometry. Petroleum shows in spilled accumulations are usually immobile at relatively constant [[Overview of routine core analysis#Residual fluid saturation|residual saturation]] over a thick section of the reservoir, with a [[Fluid contacts|paleo-fluid contact]] located near the base of the residual saturation. Petroleum in structurally spilled accumulations is relatively unaltered; oil in hydrodynamically spilled accumulations, on the other hand, is usually altered.

Petroleum loss across faults is considered spillage, not leakage, because faults are part of the trapping geometry. Petroleum shows in spilled accumulations are usually immobile at relatively constant [[Overview of routine core analysis#Residual fluid saturation|residual saturation]] over a thick section of the reservoir, with a paleo-fluid contact located near the base of the residual saturation. Petroleum in structurally spilled accumulations is relatively unaltered; oil in hydrodynamically spilled accumulations, on the other hand, is usually altered.

==See also==

==See also==