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COGIS - WELL SCOUT CARD

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 Surface Location
 API# 05-123-31295
Well Classification: GW Status: PR - 11/1/2025
Well Name/No:GUSTAFSON #31-11
(Click Well Name for Production Data)
Click Here for Transporter Gatherer Info
Operator:PRAIRIE OPERATING CO LLC - 10819
(Click Operator Name for Company Detail Report)
Federal Or State Lease #:-1
Facility Status:PRStatus Date11/1/2025
FacilityID:416136LocationID:416121
County:WELD #123Location:NWNW 31 7N65W 6
Field:EATON - #19350Elevation:4829 ft.
Basin:DENVER (DJ) BASIN  
Planned Location:494FNL  794 FWLLat/Long: 40.537770 / -104.713010Lat/Long Source: Field Measured
As Drilled Location:Footages Not AvailableLat/Long: 40.537780 / -104.713000Lat/Long Source: Field Measured
 Wellbore And Formation Details -- select either a wellbore Or formation to expand.
 

Wellbore #00             Wellbore Classification: GW             Status: PR - 11/1/2025             Measured TD: 7445 ft.

 Wellbore Data for Original WellboreWellbore Classification: GW        PR - 11/1/2025
Wellbore Permit
Permit #: Expiration Date:3/12/2012
Proposed Depth/Form:7500 ft.
Surface Mineral Owner Same:Yes
Mineral Owner:FEESurface Owner:FEE
Unit: Unit Number:
Formation And Spacing:Code: NB-CD , Formation: NIOBRARA-CODELL , Order: , Unit Acreage: 80, Drill Unit: W/2NW4
Casing:String Type: SURF, Hole Size: 12.25 in., Size: 8.625 in., Top: , Depth: 520 ft., Weight: 24 , Citings Type: PLANNED
Cement:Sacks: 265, Top: 0 ft., Bottom: 520 ft.
Casing:String Type: 1ST, Hole Size: 7.875 in., Size: 4.5 in., Top: , Depth: 7450 ft., Weight: 11.6 , Citings Type: PLANNED
Cement:Sacks: 200, Top: 6350 ft., Bottom: 7450 ft.

Wellbore Completed
Completion Date:3/4/2011
Spud Date:2/28/2011Spud Date Is:ACTUAL
Measured TD:7445 ft.Measured PB depth:7387 ft.
True Vertical TD:True Vertical PB depth:
Log Types:High Resolution Induction; Compensated Density Compensated Neutron Gamma Ray; Gamma Ray CCL Cement Bond VDL
Casing:String Type: SURF, Hole Size: 12.25 in., Size: 8.625 in., Top: 0 ft., Depth: 573 ft., Weight: 24 , Citings Type: ACTUAL
Cement:Sacks: 430, Top: 0 ft., Bottom: 573 ft., Determination Method: CALC
Casing:String Type: 1ST, Hole Size: 7.875 in., Size: 4.5 in., Top: 0 ft., Depth: 7400 ft., Weight: 11.6 , Citings Type: ACTUAL
Cement:Sacks: 545, Top: 3096 ft., Bottom: 7400 ft., Determination Method: CBL
FormationInterval TopLog BottomCoredDSTs
GREELEY SAND2912 ft.
PARKMAN3783 ft.
SUSSEX4513 ft.
NIOBRARA6976 ft.
FORT HAYS7249 ft.
CODELL7279 ft.

Formation CODL                     Formation Classification:  GW                     Status:  PR - 11/1/2025                 Interval Top: 7282 ft.    Interval Bottom: 7298 ft.

 Completed Information for Formation CODELL
1st Production Date:3/31/2011Choke Size: 
Formation Name:CODELLCommingled:No
Production Method:
Open Hole Completion:
Formation Treatment
Treatment Date:3/19/2011
Treatment Summary:Frac Codell with 4113 bbls slickwater and 114,588# 30/50 sand. Spearhead 500 bbls 7% KCL ahead of frac. Treat at an average of 5241 psi at 60.5 bpm. Max. pressure 5936 psi. Max. rate 61.3 bpm.
Tubing Size:Tubing Setting Depth:
Tubing Packer Depth:Tubing Multiple Packer:
Open Hole Top:Open Hole Bottom:
Initial Test Data:
Test Date:4/8/2011Test Method:Flowing
Hours Tested:24Gas Type:WET
Gas Disposal:SOLD
Test TypeMeasure
BBLS_H2O 2
BBLS_OIL 43
BTU_GAS 1242
CALC_GOR 1698
CASING_PRESS 350
GRAVITY_OIL 44
MCF_GAS 73
Perforation Data:
Interval Top:7282 ft.# Of Holes:64
Interval Bottom:7298 ft.Hole Size:0.38 in.
Primary Well Designation:
Low Producing      i
            All DesignationsDate
Reported PluggedN 
Out Of Service RepurposedN 
Out Of ServiceN 
Inactive ExceptionN 
Noticed InactiveN 
Defined InactiveN 
Low ProducingYProduction Period
02/2025 - 01/2026

BOE/MCFE/GOR Calculations
Production for Previous 12 Months
February 2025 - January 2026i
Total Oil Produced (Barrels)56
Total Gas Produced (MCF)90
GOR1607
GOR DeterminationBOE
Average BOE per Day0.198
Average MCFE per Day1.141

 Federal Financial Assurance  i Y

 Tribal Well  i No