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Line 17:
Line 17: − The ''Glob alt'' depositional sequence of Late Pliocene age (mapped below) is part of depositional cycle 2 in Figure 4-44. The sequence, deposited on a relatively open slope with only slightly undulating sea-floor topography, thins rapidly basinward due to sediment starvation in the most distal areas of the High Island-East Breaks depocenter (Figure 4-47). Subsequent progradation resulted in differential loading of the allochthonous salt and formation of local depocenters between downloaded growth fault sediment prisms and differentially displaced salt-cored anticlines. − + + + + + Line 28:
Line 31: − The following figure is a well-log cross section of the ''Glob alt'' reservoir interval; datum is a mudstone within the GA-2 sandstone (well locations are shown on Figure 4-46). All logs are spontaneous potential with true vertical depth displays. The GA-4 reservoir sand is below the displayed interval. Log profiles are annotated: arrow C = funnel-shaped, coarsening-upward sandstone; arrow F = bell-shaped, fining-upward sandstone; parallel lines B = blocky profile of relatively thick sandstones and thin mudstone interbeds. − + + +
East Breaks reservoir rock (view source)
Revision as of 15:20, 5 February 2014
, 15:20, 5 February 2014no edit summary
==''Glob alt'' sequence deposition==
==''Glob alt'' sequence deposition==
[[file:sedimentary-basin-analysis_fig4-47.png|thumb|{{figure number|4-47}}After Armentrout et al.<ref name=ch04r7 />). Copyright: Springer-Verlag.]]
[[File:Sedimentary-basin-analysis fig4-44.png|thumbnail|left|{{figure number|1}}.]]
[[file:sedimentary-basin-analysis_fig4-47.png|thumb|{{figure number|2}}After Armentrout et al.<ref name=ch04r7 /> Copyright: Springer-Verlag.]]
The ''Glob alt'' depositional sequence of Late Pliocene age (mapped below) is part of depositional cycle 2 in [[:file:sedimentary-basin-analysis_fig4-44.png|Figure 1]]. The sequence, deposited on a relatively open slope with only slightly undulating sea-floor topography, thins rapidly basinward due to sediment starvation in the most distal areas of the High Island-East Breaks depocenter ([[:file:sedimentary-basin-analysis_fig4-47.png|Figure 2]]). Subsequent progradation resulted in differential loading of the allochthonous salt and formation of local depocenters between downloaded growth fault sediment prisms and differentially displaced salt-cored anticlines.
==''Glob alt'' isochron and seismic facies map==
==''Glob alt'' isochron and seismic facies map==
==Well-log cross section==
==Well-log cross section==
[[file:sedimentary-basin-analysis_fig4-46.png|thumb|{{figure number|4-46}}After Armentrout et al.<ref name=ch04r7 />). Copyright: Springer-Verlag. Original map by Charles R. Beeman, Mobil Oil, 1987.]]
[[file:sedimentary-basin-analysis_fig4-46.png|thumb|{{figure number|3}}After Armentrout et al.<ref name=ch04r7 />). Copyright: Springer-Verlag. Original map by Charles R. Beeman, Mobil Oil, 1987.]]
The following figure is a well-log cross section of the ''Glob alt'' reservoir interval; datum is a mudstone within the GA-2 sandstone (well locations are shown on [[:file:sedimentary-basin-analysis_fig4-46.png|Figure 3]]). All logs are spontaneous potential with true vertical depth displays. The GA-4 reservoir sand is below the displayed interval. Log profiles are annotated: arrow C = funnel-shaped, coarsening-upward sandstone; arrow F = bell-shaped, fining-upward sandstone; parallel lines B = blocky profile of relatively thick sandstones and thin mudstone interbeds.
==Net sandstone isopachs==
==Net sandstone isopachs==