Digital Petroleum Atlas
Willtex Field
General Information
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Digital Petroleum Atlas |
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| Willtex Field Oil & Gas Data | |||
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General Field Information | |
| Geologic Province: | Sedgwick Basin |
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| Exploration Method: | Landsat photogeology and seismic |
| Surface Formation: | Ninnescah shale of the Sumner Group, Permian |
| Oldest Formation Penetrated: | Arbuckle (Ordovician) |
| Drilling Casing Practices: | Drill a 7 7/8" hole to the total depth using chemical gel mud with low weight. Unusually high mud weight and water loss have been known to suppress shows. Drillstem testing is normally not done. Perforate the potential pay interval with two jet shots per foot using a deep penetrating charge. Approximately one-half barrel of 15% hydrochloric acid (MCI) per perforation is used to clean up perforations. Put well on pump. |
| Electric Logging Practices: | Dual Induction Focused and Gamma-Density-Neutron Logs are run from approximately the Heebner Shale to the total depth, i.e. bottom 2000 feet of the borehole. |
Discovery Well(s) |
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| Discovery Date | Well Name | Available Well Data | Oil Production | Gas Production | LAS File Viewer with Core Data Plots | Core Image | Core Data Table |
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| 10 DEC 1981 | Williams, C.D. 1 | 
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No Gas Production | No Digital LAS Files | No Core Images | No Core Data |
| Well Location: | NE NE SE 9-T35S-R5W |
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| Rotary Total Depth: | 5512 |
| Production Zone: | Mississippian and Simpson Oil and Gas |
| Initial Oil Potential: | Flowed 412 BOPD |
| Initial Gas Potential: | 55.5 MCFGPD |
| Casing: | 8 5/8" @ 570' w/ 400 sx 5 1/2" @ 5512' w/ 375 sx |
| Perforations: | Dual Completion: 4980' - 5050' Mississippian 5174' - 5184' Simpson |
| Treatments: | Mississippian: Frac with 2000 gallons of water and 2000 lbs. of sand |
| Data Source: | KOGF, Vol. V; DISCOVERY 5766 |
Summary Production Information | |
| Field Size: | 640 acres |
| Total Wells: | 18 |
| Productive Oil Wells: | 9 as of April 2024 |
| Productive Gas Wells: | 5 as of April 2024 |
| Abandoned Wells: | 3 |
| Cumulative Oil: | 252,667.89 bbls as of April 2024 |
| Cumulative Gas: | 16,997.00 mcf as of April 2024 |
Producing Formation:MISSISSIPPIAN |
| Depth Top: | 4980 feet |
| Geological Age: | Mississippi Osagean (Goebel, 1968) |
| Depositional Environment: | Grain-sized material, such as bioclasts, are noticeably absent from the samples. Deposition in a low energy, restricted circulation setting is implied. Minor amounts of interpreted detrital clay minerals are present. |
| Formation Lithology: | The basal Mississippian in the Willtex Pool is characterized as cream to gray, fine to medium crystalline, partly recrystallized Mudstone (Limestone) with minor amounts of interpreted detrital clay minerals and gray-tan opaque chert. |
| Formation Geometry: | 100' to 130' of massive carbonate mudstone (Micrite) with discontinuous zones of varying recrystallization |
| Trap Type: | Primarily structural |
MISSISSIPPIAN (Mississippian System) |
| Thickness: | 70 feet |
MISSISSIPPIAN (Mississippian System) |
| Produces Oil: | Yes | Produces Gas: | Yes |
| Maximum Net Pay: | 80 feet | Average Net Pay: | 45 feet |
| Gas Oil Ratio: | 130:1 | Drive Mechanism: | Gas Expansion |
| Pressure Maintenance or EOR: | None |
| Estimated Primary Oil Recovery: | 57151 |
| Proven Production: | 240 acres | Production Well Spacing: | 10 acres |
MISSISSIPPIAN (Mississippian System) |
| Oil Color: | Black % |
| Oil Base: | Asphalt % |
| Average Oil API Gravity: | 39 |
MISSISSIPPIAN (Mississippian System) |
| Porosity Type: | Microporosity with only minor amounts of effective intercrystalline porosity and sparry calcite fracture fill | Maximum Porosity: | 8 % | Average Porosity: | 5 % |
Producing Formation:SIMPSON |
| Depth Top: | 5174 feet |
| Geological Age: | Simpson Group, Middle Ordovician |
| Depositional Environment: | Regressive marine beach sand |
| Formation Lithology: | White to gray, fine to medium grained, angular to sub rounded frosted sandstone. |
| Formation Geometry: | 10' to 35' of sandstone and shaly sandstone directly below the Viola Limestone |
| Trap Type: | Primarily structural |
SIMPSON (Simpson Group) |
| Thickness: | 10 feet |
SIMPSON (Simpson Group) |
| Produces Oil: | Yes | Produces Gas: | Yes |
| Average Net Pay: | 10 feet |
| Drive Mechanism: | Water |
| Pressure Maintenance or EOR: | Re-injection of produced water |
| Proven Production: | 240 acres | Production Well Spacing: | 10 acres |
SIMPSON (Simpson Group) |
| Oil Color: | Black % |
| Oil Base: | Asphalt % |
| Average Oil API Gravity: | 40 |
SIMPSON (Simpson Group) |
| Porosity Type: | Intergranular | Maximum Porosity: | 18 % | Average Porosity: | 10 % |
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