Application of Advanced Reservoir Characterization, Simulation, and Production Optimization Strategies to Maximize Recovery in Slope and Basin Clastic Reservoirs, West Texas (Delaware Basin)

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2000

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The objective of this Class III project is to demonstrate that detailed reservoir characterization of slope and basin elastic reservoirs in sandstones of the Delaware Mountain Group in the Delaware Basin of West Texas and New Mexico is a cost-effective way to recover a higher percentage of the original oil in place through geologically based field development. Phase 1 of the project, reservoir characterization, was completed this year, and Phase 2 began. The project is focused on East Ford field, a representative Delaware Mountain Group field that produces from the upper Bell Canyon Formation (Ramsey sandstone). The field, discovered in 1960, is operated by Orla Petco, Inc., as the East Ford unit. A CO2 flood is being conducted in the unit, and this flood is the Phase 2 demonstration for the project. The depositional model of the East Ford unit was revised on the basis of analysis of pressure and production information and reexamination of the outcrop data. Overbank splays were recognized in outcrop as being the main area of sand storage outside of the channels, not levees. This model has now been applied to the East Ford unit. Deposits flanking the Ramsey 1 and 2 channels are interpreted as consisting of narrow levees and wider overbank-splay sandstones. Deposits at the south end of the field are interpreted to be lobe sandstones in both Ramsey 1 and 2 intervals.

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