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

General Field Information

Produces Oil: Yes Produces Gas: Yes
Geologic Province: Anadarko Basin Shelf
Exploration Method: Subsurface geology-reflection Seismograph
Surface Formation: Permian-Blaine
Oldest Formation Penetrated: Ordovician-Arbuckle
Drilling Casing Practices: Drill 12 1/4" hole to approximately 650' and set either 9 5/8" or 8 5/8" surface pipe. Cement to surface. Depth of surface pipe necessitated by a persistent but not always occurring zone of lost circulation at about 450'. Drill 7 7/8" holes to total depth and set 4 1/2" casing. Cement with 150 sacks. Perforate and treat as indicated. Most of the Morrow wells were completed natural or with only a small mud acid job. The Mississippian wells were acidized with between 1,500 and 3,000 gallons.
Electric Logging Practices: Dual Induction-G.R.-S.P, CNL-FDC-G.R.-Cal., Sonic, Microlog. Gamma Ray-Neutron-Guard, Density-Caliper.
Discussion: The Lexington Field was first opened at Mesa #1-19 Seacat, SW SE Section 19-T31S-R21W in April, 1977. This well was completed flowing 94 BOPD and 603 MCFGPD from the Mississippian Meramec limestone. The test well was the first of 13 oil and gas completions as of 1985 in the Mississippian reservoir that, taken as a whole, appeared to be only marginally profitable. A one-half mile east stepout, the Mesa # 1-20 Moore, was drilled and completed in December, 1978, in the SW SW Section 20-31S-21W. This was the discovery well of the Morrow Sand pool and was completed flowing 964 BOPD and 374 MCFGPD. This well is remarkable because it produced 56,000 barrels of oil during its first 55 days of production and was shut-in pending the establishment of an appropriate allowable. The Morrow pool was spaced on "laydown" 80 acre units and the per well allowable was set at 250 BOPD by the KCC in July, 1979. The pool was quickly developed, with nine additional Morrow wells being completed in 1979, all located in the E 1/2 E 1/2 of SEC. 19, the W 1/2 W ½ of Sec. 20, and the NW 1/4 of Sec. 29. By October 1984, these original ten wells, supplemented only slightly by infill wells drilled in 1982 and 1983, had produced 2,104,291 BO and 2,400,611 MCFG. The secondary recovery unit (water flood), first proposed in 1981, had not been fully implemented by 1985. By that time, a pilot project had reported favorable results.

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
12 MAY 1977 SEACAT 1-19
No Digital LAS Files No Core Images No Core Data
Well Location: C SW SE 19-T31S-R21W
Rotary Total Depth: 5700
Production Zone: Mississippian System
Initial Oil Potential: 94 BO
Initial Gas Potential: 603 MCFGPD
Initial Formation Pressure: 1750
Casing: 9 5/8" @ 614' w/ 300 sx 4 1/2" @ 5463'
Perforations: 5177'-5244' OA - 70 holes
Treatments: 1500 Acid
Data Source: KOGF, Vol. V; DISCOVERY 634
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
11 JAN 1979 MOORE 1-20
No Digital LAS Files No Core Images No Core Data
Well Location: SW SW 20-T31S-R21W
Rotary Total Depth: 5400
Production Zone: MORROW OIL
Data Source: DISCOVERY 9123
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
12 JUL 1979 SEACAT 4-19
No Oil Production No Gas Production No Digital LAS Files No Core Images No Core Data
Well Location: NE 19-T31S-R21W
Rotary Total Depth: 5370
Production Zone: MORROW GAS
Data Source: DISCOVERY 9124
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
01 MAY 1995 Norman 24-14
No Gas Production No Digital LAS Files No Core Images No Core Data
Well Location: 19 24-T31S-R22W
Rotary Total Depth: 6806
Production Zone: VIOLA OIL AND GAS
Data Source: DISCOVERY 9125

Summary Production Information

Field Size: 2880 acres
Total Wells: 81
Productive Oil Wells: 34 as of July 2024
Productive Gas Wells: 18 as of September 2013
Abandoned Wells: 23
Cumulative Oil: 4,925,591.33 bbls as of July 2024
Cumulative Gas: 4,183,538.00 mcf as of September 2013

Producing Formation:


MISSISSIPPIAN
(Mississippian System)
Depth Top: 5160 feet
Geological Age: Mississippian - Meramec
Depositional Environment: Shallow marine
Formation Lithology: Limestone, white, cream, very fine and fine grained oolite, fossiliferous in part, spar matrix. Intergranular and pinpoint porosity.
Formation Geometry: Irregularly developed small zones of porosity
Trap Type: Stratigraphic

MISSISSIPPIAN (Mississippian System)
Thickness
Thickness: 67 feet

MISSISSIPPIAN (Mississippian System)
Oil & Gas Production Information
Produces Oil: Yes Produces Gas: Yes
Maximum Net Pay: 15 feet Average Net Pay: 7 feet
Gas Oil Ratio: 6000/1 Drive Mechanism: Gas expansion and solution gas drive
Initial Pressure: 1750 Data Source of Initial Pressure: KOGF, Vol. V
Estimated Ultimate Recovery: Same as primary
Estimated Primary Oil Recovery: 185000 Estimated Primary Gas Recovery: 1500000 Estimated Ultimate Recovery: Same as primary
Proven Production: 320 acres Production Well Spacing: 40 acres

MISSISSIPPIAN (Mississippian System)
Brine Chemistry
Resistivity: .045
Chloride Equivalent: 0 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: 0 ppm

MISSISSIPPIAN (Mississippian System)
Porosity
Porosity Type: Interoolitic - intercrystalline Maximum Porosity: 12 % Average Porosity: 8 %

Producing Formation:


MORROWAN
(Upper Kearny Member)
Depth Top: 5162 feet
Geological Age: Pennsylvanian Morrow Sand
Depositional Environment: Channel distributary
Formation Lithology: Quartz sandstone, clear, fine to very coarse grained, angular to sub-round, sorting mostly moderate to good, many grains angular because of heavy quartz overgrowth, some altered shale grains and clasts, some patchy pyrite. Sand is cross-bedded.
Formation Geometry: Lenticular sandstones deposited in a narrow channel cut into the Mississippian surface. Sand generally conforms to the shape of the channel.
Trap Type: Stratigraphic

MORROWAN (Upper Kearny Member)
Thickness
Thickness: 18 feet

MORROWAN (Upper Kearny Member)
Oil & Gas Production Information
Produces Oil: Yes Produces Gas: Yes
Maximum Net Pay: 30 feet Average Net Pay: 10 feet
Average Oil Column: 60
Oil Water Contact: -3075
Gas Oil Ratio: Original: 350/1; Cumulative: 1140/1 Drive Mechanism: Gas expansion and solution gas drive
Initial Pressure: 1650 Data Source of Initial Pressure: KOGF, Vol. V
Pressure Maintenance or EOR: Waterflood Estimated Ultimate Recovery: 3,000,000 BO; 2500 MCFG
Estimated Primary Oil Recovery: 2350000 Estimated Primary Gas Recovery: 2500 Estimated Ultimate Recovery: 3,000,000 BO; 2500 MCFG
Proven Production: 320 acres Production Well Spacing: 40 acres

MORROWAN (Upper Kearny Member)
Brine Chemistry
Resistivity: .028
Chloride Equivalent: 160000 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: 0 ppm

MORROWAN (Upper Kearny Member)
Porosity
Porosity Type: Intergranular Maximum Porosity: 28 % Average Porosity: 16 %

MORROWAN (Upper Kearny Member)
Permeability
Maximum Horizontal: 2000 md

Producing Formation:


VIOLA
(Viola Limestone Formation)

VIOLA (Viola Limestone Formation)
Oil & Gas Production Information
Produces Oil: Yes Produces Gas: Yes
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