Digital Petroleum Atlas
Mckinney Field
General Information
Mckinney Field Oil & Gas Data

General Field Information

Produces Oil: Yes Produces Gas: Yes
Geologic Province: Anadarko Basin
Exploration Method: A surface structure mapped in 1946 led Gulf Oil Corporation to acquire a 9600-acre block at the common corners of Townships 33 and 34 South, Ranges 25 and 26 West, Meade and Clark counties. Seismograph work by Gulf failed to confirm presence of closure, in that it revealed only a nosing or terracing interruption of the contours. Core drill work by Skelly Oil Company led Skelly to acquire approximately one-half of the block on a more or less 320-acre checkerboard pattern as an acreage contribution toward the drilling of an Arbuckle test. Gas units between these two companies, consisting of 640 acres, each based on governmental sections, were formed in developing the block following the discovery of gas in the initial test.
Surface Formation: Quaternary, Holocene & Pleistocene Alluvium & Dune Sand
Oldest Formation Penetrated: Ordovician Arbuckle
Drilling Casing Practices: Surface Casing: 8.625" set in 12.25" hole at 1550' with 250 sacks of Poz "C" Production Casing: 5.5" set in 7.875" hole at RTD with 150 sacks of Poz "H" Production Tubing: 2.875" landed 25" off bottom State Board of Health Required Surface Casing for Meade and Clark Counties, Spetember 1959: Set a minimum of 200 feet in all areas, in no case set less than 50 feet into the Permian. In all cases set through all unconsolidated material plus 20 feet into the underlying formation.
Drilling Fluid Practices: Water-based native gel to displacement point at 4200 feet (Heebner Shale) Chemical Gel to rotary total depth
Treatment Practices: Marmaton: Acidize with 1000 - 2,500 gallons of 15% Fe HCL containing additives Morrowan: Acidize with 3000 - 6,500 gallons of 15% Fe HCL containing additives Chesteran: Acidize with 3000 - 12,00 gallons of 15% Fe HCL containing additives
Completion Practices: Drill stem testing of the Morrow and/or Chester intervals is commonly practiced prior to drilling to the probable casing point (generally 50 feet below lowest prospective interval) and the running of electrical surveys. Both 4.5" and 5.5" casing are used as the production string in the field, with pipe set through the productive interval and completion through perforations. The Morrow sandstone is fracture treated, whereas the Chester limestones are acidized to stimulate them for completion.
Electric Logging Practices: Dual Induction, Compensated Neutron-Lithodensity, SP, Gamma Ray, Caliper
Comments: Approved Well Spacing: 160 acres and/or variable Initial completion rates prior to September 1959 ranged from calculated open flow potential of less than 1.0 MMCF per day to 65.4 MMCF per day and condensate from negligible to six barrels per MMCF. The KOGF, Vol. II report on this field has a lengthly report on production by year (oil, gas), casing requirements, and type logs.
Discussion: As of September 1959, development indicated approximately 40,000 acres were productive of gas, with production of its associated condensate varying greatly within the field. At that time, drilling and completion cost for an average well depth of 6000 feet was approximately $70,000.

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
25 JUL 1950 GRACE MCKINNEY 'A' 1
No Core Images No Core Data
Well Location: NW NW NE 2-T34S-R26W
Rotary Total Depth: 5932
Production Zone: Mississippi Chester Series
Initial Gas Potential: 14,870,744 CFG, open flow, 8-hr 2-point drawdown test
Initial Formation Pressure: 1930
Perforations: 5811' Mississippian Chester Series
Comments: Condensate (65.1 degrees A.P.I. corrected) averaged approximately six barrels per million cubic feet of gas received on a 48-hour well test.
Data Source: Digital Petroleum Atlas
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
24 JUL 1951 G. R. THEIS 'B' 1
No Digital LAS Files No Core Images No Core Data
Well Location: SW SW NE 11-T34S-R26W
Rotary Total Depth: 6123
Production Zone: Morrow Sandstone
Initial Gas Potential: 4,600,000 cubic feet of gas per day
Perforations: Morrow Sandstone at 5736' feet
Comments: Initial Potential: 21 barrels of condensate per day
Data Source: Digital Petroleum Atlas; DISCOVERY 6788
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
14 MAR 1985 ROGERS 1
No Gas Production No Digital LAS Files No Core Images No Core Data
Well Location: SE SE NE 30-T34S-R26W
Rotary Total Depth: 6175
Production Zone: Marmaton Group
Data Source: Digital Petroleum Atlas; DISCOVERY 6790
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
09 APR 1987 Ediger 1-6
No Digital LAS Files No Core Images No Core Data
Well Location: C NE NE 6-T35S-R26W
Rotary Total Depth: 6300
Production Zone: Morrow Oil
Data Source: DISCOVERY 6791

Summary Production Information

Field Size: 103680 acres
Total Wells: 453
Productive Oil Wells: 63 as of February 2024
Productive Gas Wells: 169 as of March 2024
Abandoned Wells: 149
Cumulative Oil: 1,173,368.57 bbls as of February 2024
Cumulative Gas: 249,625,378.00 mcf as of March 2024

Producing Formation:


MARMATON
(Marmaton Group)
Depth Top: 5435 feet
Geological Age: Pennsylvanian
Formation Lithology: Carbonate
Formation Geometry: Subtidal upward coarsening carbonate shoal
Trap Type: Stratigraphic, Shoaling Carbonate

MARMATON (Marmaton Group)
Thickness
Thickness: 6 feet Maximum Thickness: 6 feet

MARMATON (Marmaton Group)
Oil & Gas Production Information
Produces Oil: Yes
Maximum Net Pay: 6 feet Average Net Pay: 6 feet
Drive Mechanism: Gas expansion & poor water drive
Initial Pressure: 1950 Data Source of Initial Pressure: Digital Petroleum Atlas
Estimated Ultimate Recovery: 50 MBBLS
Estimated Ultimate Recovery: 50 MBBLS
Proven Production: 103680 acres Production Well Spacing: 160 acres

MARMATON (Marmaton Group)
Porosity
Maximum Porosity: 16 % Average Porosity: 16 %

Producing Formation:


MORROWAN
(Upper Kearny Member)
Depth Top: 5690 feet
Geological Age: Pennsylvanian
Formation Lithology: The lithology of the uppermost Morrow series is a shale (dark gray to black, carbonaceous, blocky to fissile) ranging from a few feet to an average of 20 feet thick. This is usually followed by a siliceous limestone (gray-buff-brown, microcrystalline to coarsely crystalline, glauconitic) sequence of 10 to 20 feet in thickness, interrupted by an occasional thin shale member. The amount of sand content, which varies considerably, is the criteria for occasionally using this zone for completion, together with the major pay intervals. The major pay zone of the Morrow series follows next in lithologic sequence. This consists of sandstone, clear-gray-tan, fine to coarse-grained, subangular to subrounded, poorly sorted, quartzitic and glauconitic. The remaining Morrow sequence, if not missing by reason of non-deposition due to a high position of the underlying Chester (Mississippian) series, consists of a sandy limestone sequence, interrupted by shale members, which has not displayed adequate permeability and porosity characteristics for production.
Formation Geometry: Fluvial channel sandstone
Trap Type: Stratigraphic, Incised Valley Fill: Since no major structural deformation is evident in the immediate area, the accumulation of hydrocarbons is accredited to stratigraphic traps. These traps consist of sandstone bodies within the shale source beds in the Morrow series and porous limestone zones within the Chester series that were truncated during the erosional hiatus prior to deposition by Morrow seas. The feathered thinning out of the Morrow series to the northeast is principally the result of convergence and offlap influenced by the Central Kansas Uplift. The black shales and the relatively thin limestone members, together with offshore bar sand deposits, attest to a lagoonal environment during Morrowan time. Irregularities in the unconformable surface of the Chester series subcrop caused by post-Mississippian folding followed by truncation account for local variances in thickness of the overlying Morrow sediments.
Continuity of Reservoir Rocks: A Morrow sandstone area of major proportions in the McKinney field can be ascertained in noting the Pm symbols on the structure map in the KOGF, Vol. II, page 110. This area can generally be described as dominating the southern portion of Township 34S, Range 26W. The lensing nature of the sand bodies feather out to thin limestone and shale bodies in all directions from this noteworthy sandstone concentration. The infrequency of Pm symbols located elsewhere in the field appropriately attests to the erratic nature of the other sandstone developments found within the Morrow series.

MORROWAN (Upper Kearny Member)
Thickness
Maximum Thickness: 32 feet Average Thickness: 20 feet

MORROWAN (Upper Kearny Member)
Oil & Gas Production Information
Produces Oil: Yes Produces Gas: Yes
Maximum Net Pay: 32 feet Average Net Pay: 15 feet
Drive Mechanism: Gas expansion & poor water drive. Depletion is by normal gas expansion toward pressure sinks formed at the existing well bore outlets.
Water Production: Water production has been in negligible amounts.
Initial Pressure: 1910 Data Source of Initial Pressure: Digital Petroleum Atlas
Estimated Ultimate Recovery: 90 BCF and 550 MBBLS
Estimated Ultimate Recovery: 90 BCF and 550 MBBLS
Proven Production: 103680 acres Production Well Spacing: 160 acres

MORROWAN (Upper Kearny Member)
Gas Chemistry
Minimum BTU: 1084 Maximum BTU: 1084 Gas Liquids (GPM): 17.77
Methane: 91.18 % Butane: .62 % Ethane: 4.8 %
Propane: 3.26 % Pentane: .18 % Hextane: .26 %
ISO Pentane: .18 % ISO Butane: .3 %

MORROWAN (Upper Kearny Member)
Porosity
Maximum Porosity: 23 % Average Porosity: 12 %

MORROWAN (Upper Kearny Member)
Permeability
Maximum Horizontal: 230 md Average Horizontal: 75 md

Producing Formation:


MISSISSIPPIAN CHESTER SERIES
(Chesteran Stage)
Depth Top: 5762 feet
Geological Age: Mississippian
Formation Lithology: From both a stratigraphic and interval point of view, the pay intervals of the Chester series are contained within the uppermost beds. The lithology of this portion of the Chester series consists of limestone, gray to buff, both microcrystalline to coarsely crystalline and fragmental, containing the Bryozoan Archimedes descriptive of youngest Chesterian, interbedded with gray to greenish-gray and brown fissile shales.
Formation Geometry: Cyclic peritidal-subtidal carbonate
Trap Type: Stratigraphic, Angular Unconformity: Since no major structural deformation is evident in the immediate area, the accumulation of hydrocarbons is accredited to stratigraphic traps. These traps consist of sandstone bodies within the shale source beds in the Morrow series and porous limestone zones within the Chester series that were truncated during the erosional hiatus prior to deposition by Morrow seas. The feathered thinning out of the Morrow series to the northeast is principally the result of convergence and offlap influenced by the Central Kansas Uplift. The black shales and the relatively thin limestone members, together with offshore bar sand deposits, attest to a lagoonal environment during Morrowan time. Irregularities in the unconformable surface of the Chester series subcrop caused by post-Mississippian folding followed by truncation account for local variances in thickness of the overlying Morrow sediments.
Continuity of Reservoir Rocks: The productive section of the Chester series is more widespread in its areal extent than that of the sandstones within the Morrow series. The continuity of the Chester reservoirs is, however, occasionally disturbed by unpredictable permeability changes.

MISSISSIPPIAN CHESTER SERIES (Chesteran Stage)
Thickness
Thickness: 66 feet Maximum Thickness: 50 feet

MISSISSIPPIAN CHESTER SERIES (Chesteran Stage)
Oil & Gas Production Information
Produces Oil: Yes
Maximum Net Pay: 50 feet Average Net Pay: 25 feet
Gas Water Contact: Multiple
Drive Mechanism: Gas expansion and poor water drive. Depletion is by normal gas expansion toward pressure sinks formed at the existing well bore outlets.
Water Production: Some Chester wells in the eastern portion of the field indicate the presence of large quantities of water. Water Specific Gravity 1.14
Initial Pressure: 1960 Data Source of Initial Pressure: Digital Petroleum Atlas
Estimated Ultimate Recovery: 115 BCF and 315 MBBLS
Estimated Ultimate Recovery: 115 BCF and 315 MBBLS
Proven Production: 103680 acres Production Well Spacing: 160 acres

MISSISSIPPIAN CHESTER SERIES (Chesteran Stage)
Oil Chemistry
Average Oil API Gravity: 65.1

MISSISSIPPIAN CHESTER SERIES (Chesteran Stage)
Brine Chemistry
PH: 5
Chloride Equivalent: 114000 ppm Barium: 0 ppm
Bicarbonates: 0 ppm Calcium: 0 ppm
Calcium Bicarbonate: 0 ppm Calcium Sulfate: 0 ppm
Iron: 0 Magnesium: 0 ppm
Magnesium Sulfate: 0 ppm Silica: 0
Sodium Sulfate: 0 ppm Sodium Chloride: 0 ppm
Strontium: 0 Sulfates: 200000 ppm

MISSISSIPPIAN CHESTER SERIES (Chesteran Stage)
Porosity
Maximum Porosity: 20 % Average Porosity: 10 %

MISSISSIPPIAN CHESTER SERIES (Chesteran Stage)
Permeability
Maximum Horizontal: 52 md Average Horizontal: 5 md
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