Raymond W. Suhm, Ph.D.

Petroleum Geologist and Geophysicist




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Central Oklahoma (Shallow Oil)

Central Oklahoma is the focal point of shallow to intermediate (3000' to 6000') oil in Oklahoma.  The Ordovician Simpson Group sandstones; Viola and Hunton carbonates are among the most prolific reservoirs in this oil-rich area of Oklahoma which includes Pottawatomie, Garvin, McClain, Oklahoma, Cleveland, and Seminole counties.  This area is characterized by broad low relief anticlines and domes that are interrupted by occasional vertical faults.  Hydrocarbon traps are predominantly structural in nature for pre-Pennsylvanian objectives.

In central Oklahoma most Viola and Hunton wells drilled from 2D seismic are dry holes because the structure is not closed.  Too often, the seismic high that is drilled is a "nose" without structural closure.  To confirm closure, all  existing seismic data has to be utilized and consideration given to purchasing or shooting additional seismic data.

West St. Louis Prospect (development)

Location: Pottawatomie County, Oklahoma
Total Depth: 4500'
Objectives: Primary  -  Bois D'Arc (Hunton limestone), Wilcox sands
Secondary  -  Earlsboro, Chimney Hill (Hunton limestone), St. Louis dolomite
Trap: Anticline (seismic control)
Reserves: 350,000 BO/well, six wells on 40-acre spacing

North Tecumseh Prospect (development)

Location: Pottawatomie County, Oklahoma
Total Depth: 4600'
Objectives: Primary  -  Hunton and Viola limestone, 1st and 2nd Wilcox sands
Secondary  -  Pennsylvanian sands, Arbuckle dolomite
Trap: Anticline (seismic control)
Reserves: 300,000 BO/well, potential for 25 wells on 40-acre spacing

West Morvin Prospect (development)

Location: Pottawatomie County, Oklahoma
Total Depth: 5900'
Objectives: Hunton and Viola limestone, Simpson and Pennsylvanian sands
Trap: Horst Block with anticlinal closure (seismic control)
Reserves: 500,000 BO/well, potential for 10 wells on 40-acre spacing

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Copyright © 2008 R. W. Suhm