Changes

==Procedure==

==Procedure==

[[file:evaluating-top-and-fault-seal_fig10-26.png|thumb|{{figure number|1}}See text for explanation.]]

[[file:evaluating-top-and-fault-seal_fig10-26.png|thumb|{{figure number|1}}FPP of a portion of a fault in a Gulf Coast field.]]

The table below outlines a procedure for analyzing fault seal behavior.

The table below outlines a procedure for analyzing fault seal behavior.

==Determine seal behavior==

==Determine seal behavior==

[[file:evaluating-top-and-fault-seal_fig10-27.png|thumb|{{figure number|2}}See text for explanation.]]

[[file:evaluating-top-and-fault-seal_fig10-27.png|thumb|{{figure number|2}}Examples of cross-leaking and cross-sealing portions of the fault.]]

Examples of cross-leaking and cross-sealing portions of the fault are shown in [[:file:evaluating-top-and-fault-seal_fig10-27.png|Figure 2]], which is a detail of [[:file:evaluating-top-and-fault-seal_fig10-26.png|Figure 1]]. Juxtapositions of the 7100/7100 sands and the 7200/7200 sands are cross leaking (left). These sand/sand juxtapositions have common hydrocarbon contacts across the fault. The portion of the fault juxtaposing the 7100/7200 sands, however, is cross sealing (right). Hydrocarbons in the 7200 sand in the hanging wall (R_u) are juxtaposed with water-wet sands of the 7100 sand in the footwall (R_d).

Examples of cross-leaking and cross-sealing portions of the fault are shown in [[:file:evaluating-top-and-fault-seal_fig10-27.png|Figure 2]], which is a detail of [[:file:evaluating-top-and-fault-seal_fig10-26.png|Figure 1]]. Juxtapositions of the 7100/7100 sands and the 7200/7200 sands are cross leaking (left). These sand/sand juxtapositions have common hydrocarbon contacts across the fault. The portion of the fault juxtaposing the 7100/7200 sands, however, is cross sealing (right). Hydrocarbons in the 7200 sand in the hanging wall (R_u) are juxtaposed with water-wet sands of the 7100 sand in the footwall (R_d).

==Calculate SGR and construct SGR map==

==Calculate SGR and construct SGR map==

[[file:evaluating-top-and-fault-seal_fig10-28.jpg|thumb|{{figure number|3}}See text for explanation.]]

[[file:evaluating-top-and-fault-seal_fig10-28.jpg|thumb|{{figure number|3}}Map of the SGR contoured on the FPP of the fault .]]

SGR is calculated over the surface of the entire fault. [[:file:evaluating-top-and-fault-seal_fig10-28.jpg|Figure 3]] is a map of the SGR contoured on the FPP of the fault in [[:file:evaluating-top-and-fault-seal_fig10-26.png|Figure 1]]. SGR—and seal potential—vary over the surface of the fault as the throw and stratigraphy change. Areas of high SGR are shown in red and orange. Areas of low SGR are shown in purple and blue.

SGR is calculated over the surface of the entire fault. [[:file:evaluating-top-and-fault-seal_fig10-28.jpg|Figure 3]] is a map of the SGR contoured on the FPP of the fault in [[:file:evaluating-top-and-fault-seal_fig10-26.png|Figure 1]]. SGR—and seal potential—vary over the surface of the fault as the throw and stratigraphy change. Areas of high SGR are shown in red and orange. Areas of low SGR are shown in purple and blue.

==Example: correlating SGRs, seal behavior==

==Example: correlating SGRs, seal behavior==

[[file:evaluating-top-and-fault-seal_fig10-29.png|thumb|{{figure number|4}}See text for explanation.]]

[[file:evaluating-top-and-fault-seal_fig10-29.png|thumb|{{figure number|4}}SGRs of two cross-leaking and cross-sealing segments of the fault.]]

[[file:evaluating-top-and-fault-seal_fig10-33.png|thumb|{{figure number|5}}See text for explanation.]]

[[file:evaluating-top-and-fault-seal_fig10-33.png|thumb|{{figure number|5}}See text for explanation.]]