Play: Morrow Basin: Anadarko County: Stanton County Arroyo Field--General Information

Summary of Field Data

Producing Formations:

Lower Morrow (Keyes)

Mississippian (St. Louis)

Discovery Date:

April 12, 1990, Lower Morrow

June 23, 1992, Mississippian

Reservoir Parameters:

Lower Morrow, sandstone, 0 to 60 ft.

Mississippian, carbonate, 0 to 12 ft.

Reservoir Geometry:

Lower Morrow, upward coarsening shoreface deposits

Mississippian, subtidal nearshore ooolite shoal

Net Pay max/ave:

Lower Morrow, 60 ft. / 30 ft.

Mississippian, 12 ft. / 12 ft.

Porosity max/ave:

Lower Morrow, 20% / 14%

Mississippian, 18% / 14%

Permeability max/ave:

Lower Morrow, unknown

Mississippian, unknown

Water Saturation:unknown

Initial Field Pressure:

Lower Morrow, 1,434 psia, Dst Final Shut-in, Kendrick 14-1

Mississippian, 1,475 psia, Dst Final Shut-in, Fretz 16-1

Temperature:

Lower Morrow, 125 degrees F

Mississippian, 127 degrees F

Drive Mechanism:

Lower Morrow, Gas Expansion

Mississippian, Dissolved Gas and Water

Produced Fluid Contacts:

Lower Morrow, Gas/OIl: (Variable), Oil/Water: (Variable)

Mississippian, Oil/Water: (-2203)

Logging Practice:

Dual Induction - SFL, Spontaneous Potential, Gamma Ray

Compensated Neuton, LithoDensity

Long Spaced Sonic

MicroLog

Drilling-Casing Practice:

Conductor Casing: 20 in. set in 30 in. hole at 50 ft. with 4 cubic yards of Redi-Mix

Surface Casing: 8.625 in set in 12.25 in. hole at 1650 ft. with 550 sacks of Poz "C"

Production Casing: 5.5 in. set in 7.875 in. hole at 5800 ft. two-staged through DV tool with 1200 sacks of Poz "H"

Drilling Fluid Practice:

Water based gel to displacement point at 3600 ft.

Chemical Gel to rotary total depth

Treatment Practice:

Lower Morrow: acidize with 1500 gals. of 7.5% Fe HCL containing additives

Lower Morrow: fracture with 28,000 gals. of CO2 foam and 27,000 lbs. of 20/40 sand

Mississippian: acidize with 1500 gals. of 15% Fe HCL containing additives