Assessing Technical and Economic Recovery of Oil Resources

Basin Name Permian West Texas 8A29 YField NameReservoirROBERTSONSAN ANDRESReservoir Parameters: MPZ ROZ Oil Production MPZ ROZ Volumes MPZ ROZArea (A) 6,000 6,000 Producing Wells (active) 3 - OOIP (MMbl) 7.0 93.9Net Pay (ft) 2 65 Producing Wells (shut-in) 1 - Cum P/S Oil (MMbl) 2.3 -Depth (ft) 4,700 4,754 Cum Oil (MMbbl) 2.3 - 2002 P/S Reserves (MMbl) 0.1 -Oil-Water Contact Dip N/A 30 2002 Production (MMbbl) 0.0 - Ult P/S Recovery (MMbl) 2.4 -Porosity 11.0% 11.0% CO2-EOR Cum (MMbbl) - - Remaining (MMbbl) 4.5 93.9Reservoir Temp (deg F) 108 108 2002 CO2-EOR (MMbbl) - - Recovery Efficiency (%) 35% 0%Initial Pressure (psi) -1 -1 02 CO2-EOR Reserves (MMbbl) - -Pressure (psi) -1 -1 OOIP Volume CheckWater Production Reservoir Volume (AF) 14,491 389,711Boi 1.240 1.240 2002 Water Production (Mbbl) 0 0 Bbl/AF 481.7 240.9B o @ S o , swept 1.050 1.240 Daily Water (Mbbl/d) 0 0.0 OOIP Check (MMbl) 7.0 93.9S oi 0.700 0.350Swept Zone So 0.350 0.350 Injection SROIP Volume CheckS wi 0.300 0.650 Injection Wells (active) 0 0 Reservoir Volume (AF) 14,491 389,711Injection Wells (shut-in) 0 0 Swept Zone Bbl/AF 284.5 240.9API Gravity 32 32 2002 Water Injection (MMbbl) 0 0.0 SROIP Check (MMbbl) 4.1 93.9Viscosity (cp) 1.54 1.54 Daily Injection - Field (Mbbl/d) 0 0.0Cum Injection (MMbbl) 0 0.0Dykstra-Parsons 0.75 0.75 Daily Inj per Well (Bbl/d) 0.0 ROIP Volume CheckROIP Check (MMbl) 4.5 93.9Figure 31. Robertson Field Input Parameters3-18 February 2006