Reservoir Name: Wolfcamp Shale
Basin: Delaware Basin
Location: West Texas & Southeastern New Mexico, USA
Coordinates: Latitude 31.7° N, Longitude 103.5° W
Reservoir Type: Unconventional Shale Reservoir
Rock Lithology: Organic-rich Mudstone with Interbedded Carbonates and Siltstone
Reservoir Size: ~25,000 square miles
Reservoir Width: 150 - 300 miles
Reservoir Thickness: 200 - 400 ft
Net Pay Thickness: 50 - 300 ft
Initial Oil in Place (OIP): ~50 billion barrels
Initial Gas in Place (GIP): ~450 trillion cubic feet (TCF)
Proven Recoverable Reserves: 10 billion barrels of oil
Average Depth: 8,000 - 10,000 ft
Initial Reservoir Pressure: 4,500 - 7,500 psi
Reservoir Temperature: 220 - 250 °F
Presence of Natural Fractures: Moderate, localized within brittle zones
Faulting: Present, with normal and strike-slip faults impacting stress distribution
Salt Dome Influence: None in primary production zones
Aquifer Influence: Limited, weak water drive
Geomechanical Stress Regime: Normal to strike-slip faulting regime
Hydraulic Fracturing Requirement: Necessary due to ultralow permeability
Porosity: 6 - 12%
Permeability: 0.01 - 0.1 µD
Total Organic Carbon (TOC): 3 - 6%
Clay Content: 20 - 40%
Brittleness Index: High (~50 - 70% quartz & carbonate content)
Minimum Horizontal Stress: 35 - 60 MPa
Fracture Toughness: 0.5 - 2.0 MPa·m½
Capillary Pressure: 10 - 100 psi
Water Saturation: 25 - 55%
Oil Saturation: 30 - 60%
Gas-Oil Ratio (GOR): 800 - 3,000 SCF/STB
Presence of Overpressure: Yes, ~0.7 - 0.9 psi/ft pressure gradient
Main Recovery Mechanism: Hydraulic Fracturing & Artificial Lift