Digital Petroleum Atlas
Robbins Ranch Field
General Information
Robbins Ranch Field Oil & Gas Data

General Field Information

Produces Oil: Yes Produces Gas: No
Exploration Method: Surface structure mapping

Discovery Well(s)
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
10 FEB 1953 Robbins Ranch 1
No Oil Production No Gas Production No Digital LAS Files No Core Images No Core Data
Well Location: SE NE NW 23-T31S-R16W
Rotary Total Depth: 4926
Production Zone: MISSISSIPPIAN GAS AND OIL
Initial Gas Potential: 6 MCF
Initial Formation Pressure: 1474
Perforations: Mississippian Chert
Treatments: Fractured open hole from 4888 to 4915. Before fracturing it tested 960,000 cubic feet of gas. After fracturng it tested 6,000,000 cubic feet of gas.
Data Source: KOGF, Vol. I; DISCOVERY 716
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Summary Production Information

Field Size: 640 acres
Total Wells: 3
Productive Oil Wells:

Producing Formation:


MISSISSIPPIAN
(Mississippian System)
Depth Top: 4915 feet
Formation Lithology: White, vitreous chert with a little tripolotic chert
Trap Type: Stratigraphic (erosional). Regional dip on the Mississippian is toward the southwest. The Mississippian thins toward the northeast and thickens southwestward, underlying this area. The producing zone pinches out toward the northeast and thickens toward the southwest and water is present on the down-dip, or southwest, side. The gas and oil has accumulated above the water and against the pinchout on the northeast side.

MISSISSIPPIAN (Mississippian System)
Thickness
Maximum Thickness: 90 feet

MISSISSIPPIAN (Mississippian System)
Oil & Gas Production Information
Produces Oil: Yes Produces Gas: Yes
Average Oil Column: 5 Average Gas Column: 29
Water Production: From April 14 to 16, 1953, the well made 32 gallons of fluid, which was 45% water plus colored gasoline. In September 1955, the well was down for 72 hours and during that time it made 29 barrels of water and 7 barrels of oil accumulated.

MISSISSIPPIAN (Mississippian System)
Gas Chemistry
Maximum BTU: 1070
Carbon Dioxide: .19 %
Methane: 84.67 % Ethane: 11.92 %

MISSISSIPPIAN (Mississippian System)
Oil Chemistry
Oil Color: Light amber green %
Average Oil API Gravity: 41.4

MISSISSIPPIAN (Mississippian System)
Porosity
Porosity Type: Porosity is in fractures in the chert
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