Gas Storage Fields
Field name: Cunningham ; Operated by Northern Natural Gas Co.
Located in: Pratt County

Reservoir discovered: 1931 ; Year Activated: 1978 ; Active?: Yes

Storage Type: Depleted Reservoir
Original Contents: Gas, Oil & Water ; Original Pressure: 1540 (psig); Original reserves: 74000 (mmcf)

Formation Name: Viola
Storage Lithology: Dolomite
Gross Thickness: 40 (feet)
Trap Type: Structural Trap
Formation Depth Maximum: 4361 ; Minimum: 3923

Injection or Withdrawl Wells: 53
Observation, Pressure Control Wells: 18
Compressor Horsepower: 13545
Pipe Diameter Maximum: 24 ; Minimum 2

Base Gas Volume: 30000 (mmcf)
Maximum Developed Gas Volume: 26000 (mmcf)
Maximum Storage Pressure: 1600 (psig)
Maximum Daily Delverability: 650000 (mcf)
Maximum Designed Daily Volume: (mcf)
Annual Cycling Capability: 2
Undeveloped Capacity: 0 (mmcf)