Changes

[[File:Sedimentary-basin-analysis_fig4-25.png|thumb|300px|{{figure number|3}}Correlation of the the third-order eustatic curve of Haq et al (1988){{citation needed}} and the oxygen isotope curve of William and Trainor (1987) with seven prograding clinoform intervals from the High Island South Addition in the GOM basin. From Armentrout (1993);{{citation needed}} Courtesy Gulf Coast SEPM.]]

[[File:Sedimentary-basin-analysis_fig4-25.png|thumb|300px|{{figure number|3}}Correlation of the the third-order eustatic curve of Haq et al (1988){{citation needed}} and the oxygen isotope curve of William and Trainor (1987) with seven prograding clinoform intervals from the High Island South Addition in the GOM basin. From Armentrout (1993);{{citation needed}} Courtesy Gulf Coast SEPM.]]

The top seal of the ''Glob alt'' reservoir is especially effective because it is thick and has a regional extent as a consequence of its position at a third-order turnaround from regression to transgression. This turnaround is from regressive cycles 3.4–3.5–3.6 to transgressive cycles 3.7–3.8 on the Haq et al.<ref name=ch04r43>Haq, B., Hardenbol, J., Vail, P., R., 1988, Mesozoic and Cenozoic chronostratigraphy and cycles of sea-level change: SEPM Special Publication 42, p. 71–108.</ref> cycle chart (see Figure 4-25).

The top seal of the ''Glob alt'' reservoir is especially effective because it is thick and has a regional extent as a consequence of its position at a third-order turnaround from regression to transgression. This turnaround is from regressive cycles 3.4–3.5–3.6 to transgressive cycles 3.7–3.8 on the Haq et al.<ref name=ch04r43>Haq, B., Hardenbol, J., Vail, P., R., 1988, Mesozoic and Cenozoic chronostratigraphy and cycles of sea-level change: SEPM Special Publication 42, p. 71–108.</ref> cycle chart ([[:File:Sedimentary-basin-analysis_fig4-25.png|Figure 3]]).

Despite its regional extent and thickness, hydrocarbons have leaked upward into the ''Hyal B'' and ''Trim A'' reservoirs, most probably along faults during intervals of fault movement with consequent dilation of fracture networks along the fault

Despite its regional extent and thickness, hydrocarbons have leaked upward into the ''Hyal B'' and ''Trim A'' reservoirs, most probably along faults during intervals of fault movement with consequent dilation of fracture networks along the fault