Changes

Because of leaky seals—especially lateral seals—many [[stratigraphic trap]]s have short [[hydrocarbon column]] heights. In these kinds of plays, [[reservoir quality]] can be critical. Higher quality reservoirs require less column height to drive [[water saturation]]s low enough for water-free production. Lower quality reservoirs require more column height for water-free production.

Because of leaky seals—especially lateral seals—many [[stratigraphic trap]]s have short [[hydrocarbon column]] heights. In these kinds of plays, [[reservoir quality]] can be critical. Higher quality reservoirs require less column height to drive [[water saturation]]s low enough for water-free production. Lower quality reservoirs require more column height for water-free production.

For example, a trap with [[length::100 ft]] (32 m) of stratigraphic closure has a maximum column height of [[length::100 ft]]. If its reservoir is a [[Wikipedia:Mesoporous material mesoporous]] sandstone with 18% [[porosity]] and 10 md [[permeability]], then the bottom [[length::75 ft]] (20 m) of the trap will produce both oil and water in a long transition zone. Commercial production can be reached only at the top, where buoyancy pressure is sufficient to create water-free production.

For example, a trap with [[length::100 ft]] (32 m) of stratigraphic closure has a maximum column height of [[length::100 ft]]. If its reservoir is a [[Wikipedia:Mesoporous material|mesoporous]] sandstone with 18% [[porosity]] and 10 md [[permeability]], then the bottom [[length::75 ft]] (20 m) of the trap will produce both oil and water in a long transition zone. Commercial production can be reached only at the top, where [[buoyancy pressure]] is sufficient to create water-free production.

==See also==

==See also==