Changes

[[file:evaluating-top-and-fault-seal_fig10-45.png|thumb|300px|{{figure number|1}}Distribution of oil and gas production from more than 20,000 wells.<ref name=ch10r47 /> Copyright: Oil & Gas Journal.]]

[[file:evaluating-top-and-fault-seal_fig10-45.png|thumb|300px|{{figure number|1}}Distribution of oil and gas production from more than 20,000 wells.<ref name=ch10r47 /> Copyright: Oil & Gas Journal.]]

The chance of finding an economically successful accumulation in the Gulf Coast decreases with depth. This decrease is a result of several changes, including [[reservoir quality]] and [[migration pathway]]s. Most importantly, however, the distribution of hydrocarbons is closely related to the top of the overpressure zone. [[:file:evaluating-top-and-fault-seal_fig10-45.png|Figure 1]] shows the distribution of oil and gas production from more than 20,000 wells. Most hydrocarbons are found near or slightly above the top of the overpressured zone. The chance of success is reduced by 90–95% at depths of 2,000–5,000 ft below the top of overpressure.<ref name=ch10r47 />

The chance of finding an economically successful [[accumulation]] in the Gulf Coast decreases with depth. This decrease is a result of several changes, including [[reservoir quality]] and [[migration pathway]]s. Most importantly, however, the distribution of hydrocarbons is closely related to the top of the overpressure zone. [[:file:evaluating-top-and-fault-seal_fig10-45.png|Figure 1]] shows the distribution of oil and gas production from more than 20,000 wells. Most hydrocarbons are found near or slightly above the top of the overpressured zone. The chance of success is reduced by 90–95% at depths of 2,000–5,000 ft below the top of overpressure.<ref name=ch10r47 />

==[[Hydrocarbon distribution]] vs. overpressure==

==[[Hydrocarbon distribution]] vs. overpressure==