Digital Petroleum Atlas
Liberal Southeast Field
General Information
Liberal Southeast Field Oil & Gas Data

General Field Information

Produces Oil: Yes Produces Gas: Yes
Geologic Province: Hugoton Embayment of the Anadarko Basin
Exploration Method: Stanolind Oil and Gas Corporation, which later became Pan American, drilled the discovery well on an anticlinal structure contoured on the base of the Cimarron anhydrite. This structure was defined by use of a core drill. The Mississippian reservoir was found by cleaning out an old dry hole and testing the Morrow sandstone and the Mississippian.
Drilling Casing Practices: The early wells in the field were drilled into the Mississippian or older formations, then plugged back and casing was set on top of the producing sand. These wells were completed naturally from the open hole with the only stimulation treatment being a minor wash with mud acid. Later wells have set casing through the Morrow sandstone pay and perforated the casing. Following perforation, the wells were hydraulically fractured to increase the gas flow. As of July 1959, this practice appears to have supplanted the original top setting method of completion.
Comments: The field lies astride the Kansas-Oklahoma state line with the major portion of the field being in Kansas.
Discussion: As of July 1959, the average cost of a 6300 foot dry hole was $64,000 and a producing well drilled to the same depth cost between $82,000 and $128,000. The average cost of a fully equipped producing well was $100,000.

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
07 MAR 1947 Pearl Feathers 1
No Core Images No Core Data
Well Location: SW SW NE 15-T35S-R33W
Rotary Total Depth: 8243
Production Zone: Morrow Gas
Initial Gas Potential: 4965 MMCF
Initial Formation Pressure: 1575
Comments: Average depth to producing sandstone: 6100 feet. Initial potential of 4,965 MMCF of gas from the Morrow sandstone was determined from a 20-minute open flow test.
Data Source: DISCOVERY 3764
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
01 JUL 1953 Ide-Larrabee 1
No Oil Production No Gas Production No Digital LAS Files No Core Images No Core Data
Well Location: SW NE NE 16-T35S-R33W
Rotary Total Depth: 6345
Production Zone: Misissippian
Initial Gas Potential: 600 MCF
Comments: Initial potential 600 MCF of gas commingled Morrow and Mississippian production. Average depth to the Mississippian reservoir: 6275 feet. This discovery occurred during a workover (15-175-00086-0001) of the original well, the Chloe S. Swartz 1.
Data Source: KOGF, Vol. II
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
07 MAR 1962 Fincham 1
No Digital LAS Files No Core Images No Core Data
Well Location: C SW NE 3-T35S-R33W
Rotary Total Depth: 6304
Production Zone: Mississippian System
Data Source: DISCOVERY 6392
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
07 NOV 1973 Feldman 1
No Gas Production No Digital LAS Files No Core Images No Core Data
Well Location: SW NE 2-T35S-R33W
Rotary Total Depth: 7090
Production Zone: Mississippian System
Data Source: DISCOVERY 6393
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
01 JUN 1978 Newlin 1
No Digital LAS Files No Core Images No Core Data
Well Location: SW SW SW 2-T35S-R33W
Rotary Total Depth: 6230
Production Zone: Cherokee Group
Data Source: DISCOVERY 6394
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
14 MAY 1998 Boles 'D' 2
No Oil Production
No Core Images No Core Data
Well Location: NE NE 15-T35S-R34W
Rotary Total Depth: 6750
Production Zone: Shaw Oil
Data Source: DISCOVERY 6395
Discovery Date Well Name Available Well Data Oil Production Gas Production LAS File Viewer with Core Data Plots Core Image Core Data Table
30 NOV 1999 Tucker 'M' 1
No Core Images No Core Data
Well Location: C/2 SW 6-T35S-R33W
Rotary Total Depth: 9050
Production Zone: Miss-gas
Data Source: DISCOVERY 6402

Summary Production Information

Field Size: 14400 acres
Total Wells: 73
Productive Oil Wells: 11 as of December 2023
Productive Gas Wells: 36 as of December 2023
Abandoned Wells: 16
Cumulative Oil: 643,598.90 bbls as of December 2023
Cumulative Gas: 69,021,998.00 mcf as of December 2023

Producing Formation:


CHEROKEE
(Cherokee Group)
Depth Top: 5511 feet
Trap Type: Structurally the Liberal Southeast field lies within the Hugoton Embayment, an arm of the much larger Anadarko basin. Regional structure consists of homoclinal dip on all beds to the southeast, toward the deep trough of the Anadarko Basin. Local structure has been formed where major uplifts have interrupted regional dip. The two major structures are the Keyes Dome (in Cimarron County, Oklahoma) and the Plains or Kismet High. Minor structures, especially those found in the lower Pennsylvanian Morrow sandstone, may be formed by compaction over old Mississippian topographic highs. These local structures appear to have no direct influence on gas accumulation but may have directly affected the character and deposition of the sandstone. The production is from stratigraphic traps that were either a beach sand deposit or an off-shore sand bar. These reservoirs are further limited by grading laterally into nonporous nonpermeable sandy limestones or silty shales. These permeability barriers prevented lateral or up dip migration. Production in this field is controlled primarily by the fortuitous occurrence of a reservoir rather than regional or local structure. In July 1959, the Mississippian reservoir was noneconomic and had not been exploited, which made it impossible to accurately determine the nature of the reservoir.

CHEROKEE (Cherokee Group)
Thickness
Thickness: 2 feet

CHEROKEE (Cherokee Group)
Oil & Gas Production Information
Produces Oil: Yes

Producing Formation:


MORROWAN
(Upper Kearny Member)
Depth Top: 6202 feet
Formation Lithology: Rock modifiers found in this reservoir are calcium carbonate as a cementing agent and shale.
Trap Type: Structurally the Liberal Southeast field lies within the Hugoton Embayment, an arm of the much larger Anadarko basin. Regional structure consists of homoclinal dip on all beds to the southeast, toward the deep trough of the Anadarko Basin. Local structure has been formed where major uplifts have interrupted regional dip. The two major structures are the Keyes Dome (in Cimarron County, Oklahoma) and the Plains or Kismet High. Minor structures, especially those found in the lower Pennsylvanian Morrow sandstone, may be formed by compaction over old Mississippian topographic highs. These local structures appear to have no direct influence on gas accumulation but may have directly affected the character and deposition of the sandstone. The production is from stratigraphic traps that were either a beach sand deposit or an off-shore sand bar. These reservoirs are further limited by grading laterally into nonporous nonpermeable sandy limestones or silty shales. These permeability barriers prevented lateral or up dip migration. Production in this field is controlled primarily by the fortuitous occurrence of a reservoir rather than regional or local structure. In July 1959, the Mississippian reservoir was noneconomic and had not been exploited, which made it impossible to accurately determine the nature of the reservoir.
Continuity of Reservoir Rocks: The well spacing in this field suggests an off-shore sand bar of Morrowan age extending in an east-west direction approximately 3.5 miles, and about a mile in width.

MORROWAN (Upper Kearny Member)
Thickness
Maximum Thickness: 51 feet Average Thickness: 34 feet

MORROWAN (Upper Kearny Member)
Oil & Gas Production Information
Produces Gas: Yes
Maximum Net Pay: 41 feet
Average Oil Column: 0 Average Gas Column: 41
Water Production: The Morrow sandstone reservoir is water free and the wells make no water on completion. When the reservoir nears depletion, the release of reservoir pressure frees interstitial water and allows this water to enter the bore hole. Reservoir pressure, however, must drop almost to abandonment pressure before water is produced with the gas. The volume of water produced is minor and creates no disposal problems.

MORROWAN (Upper Kearny Member)
Porosity
Maximum Porosity: 16.3 % Average Porosity: 11.3 %

MORROWAN (Upper Kearny Member)
Permeability
Maximum Horizontal: 305 md Average Horizontal: 75.4 md

Producing Formation:


CHESTERAN
(Chesteran Stage)
Depth Top: 6407 feet
Formation Lithology: A gray, fine, crystalline, fossiliferous limestone.
Trap Type: Structurally the Liberal Southeast field lies within the Hugoton Embayment, an arm of the much larger Anadarko basin. Regional structure consists of homoclinal dip on all beds to the southeast, toward the deep trough of the Anadarko Basin. Local structure has been formed where major uplifts have interrupted regional dip. The two major structures are the Keyes Dome (in Cimarron County, Oklahoma) and the Plains or Kismet High. Minor structures, especially those found in the lower Pennsylvanian Morrow sandstone, may be formed by compaction over old Mississippian topographic highs. These local structures appear to have no direct influence on gas accumulation but may have directly affected the character and deposition of the sandstone. The production is from stratigraphic traps that were either a beach sand deposit or an off-shore sand bar. These reservoirs are further limited by grading laterally into nonporous nonpermeable sandy limestones or silty shales. These permeability barriers prevented lateral or up dip migration. Production in this field is controlled primarily by the fortuitous occurrence of a reservoir rather than regional or local structure. In July 1959, the Mississippian reservoir was noneconomic and had not been exploited, which made it impossible to accurately determine the nature of the reservoir.
Continuity of Reservoir Rocks: The Mississippian limestone reservoir is apparently of very small areal extent. The permeable porous reservoir is very limited but the limestone member is quite widespread.

CHESTERAN (Chesteran Stage)
Thickness
Thickness: 4 feet Maximum Thickness: 11 feet

CHESTERAN (Chesteran Stage)
Oil & Gas Production Information
Produces Oil: Yes Produces Gas: Yes
Maximum Net Pay: 11 feet
Average Oil Column: 0 Average Gas Column: 11

CHESTERAN (Chesteran Stage)
Gas Chemistry
Minimum BTU: 1111.5 Maximum BTU: 1111.5
Nitrogen: 1.37 %
Methane: 90.56 % Butane: .71 % Ethane: 4.21 %
Propane: 2.22 % Pentane: .22 % Hextane: .27 %
ISO Pentane: .09 % ISO Butane: .35 %
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