Multiple Fields within the Sequence Stratigraphic Framework of the Greater Auger Basin, Gulf of Mexico
Michael C. Dean, James R. Booth, Bruce T. Mitchell, 2002. "Multiple Fields within the Sequence Stratigraphic Framework of the Greater Auger Basin, Gulf of Mexico", Sequence Stratigraphic Models for Exploration and Production: Evolving Methodology, Emerging Models and Application Histories, John M. Armentrout, Norman C. Rosen
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The greater Auger basin lies approximately 220 miles south southwest of New Orleans, Louisiana in the deep water Gulf of Mexico. Multiple exploration and development wells from five Shell producing fields in the greater Auger basin have provided sequence stratigraphic information from several different basin settings and different seismic facies (e.g., Prather et al., 1998). Two of these, the proximal Auger Field and the distal Macaroni Field have been used by Booth et al. (2000) to classify the overall seismic–stratigraphic framework of the basin. Additional drilling has provided information from three other fields to tie into this framework. Shell’s producing fields in the greater Auger basin are Auger, Cardamom, Macaroni, Oregano, and Serrano. Though these fields lie within the same basin-scale sequence stratigraphic framework, their depositional settings vary considerably. Presently, the Auger salt dome, East Auger fault, and North Auger fault partition the greater Auger bbasin into two sub-basins. At the time of deposition of many of the producing reservoirs, these structural features have manifested themselves in the form of the northwest-southeast trending Auger ridge. Macaroni, Oregano, and Auger fields lie south of these structural features, in the Auger basin proper and are primarily oil-bearing. Serrano and Cardamom lie northeast of these features in the Andros basin and are primarily gas bearing. The greater Auger basin is an excellent case study for variations in the deposition and preservation of reservoir quality sands in multiple basin settings. Although the mechanisms differ in different settings, productive sands can be found in proximal, distal, and lateral settings within the basin. In each setting, however, deposition is controlled both by sediment source and accommodation space. The reservoirs at Oregano Field are healed slope deposits most similar to those at Auger Field; Serrano reservoirs are locally ponded deposits similar to those at Macaroni Field; and Cardamom reservoirs appear to represent both healed slope and ponded deposits.