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 Surface Location
 API# 05-123-36105
Well Classification: OW Status: PR - 12/1/2025
Well Name/No:Antelope #41-44-31HZ
(Click Well Name for Production Data)
Click Here for Transporter Gatherer Info
Operator:BONANZA CREEK ENERGY OPERATING COMPANY LLC - 8960
(Click Operator Name for Company Detail Report)
Federal Or State Lease #:
Facility Status:PRStatus Date12/1/2025
FacilityID:430259LocationID:421165
County:WELD #123Location:NENE 31 5N62W 6
Field:WATTENBERG - #90750Elevation:4604 ft.
Basin:DENVER (DJ) BASIN  
Planned Location:776FNL  548 FELLat/Long: 40.361280 / -104.358910Lat/Long Source: Field Measured
As Drilled Location:Footages Not AvailableLat/Long: 40.361280 / -104.358910Lat/Long Source: Field Measured
 
FracFocus
Disclosure: Sidetrack #00
Start Date: 11/10/2012
End Date: 11/10/2012
Reported: 12/3/2012
Days to report: 23
 Wellbore And Formation Details -- select either a wellbore Or formation to expand.
 

Wellbore #00             Wellbore Classification: OW             Status: PR - 12/1/2025             Measured TD: 11050 ft.    Vertical TD: 6356 ft.

 Wellbore Data for Original WellboreWellbore Classification: OW        PR - 12/1/2025
Wellbore PermitHORIZONTAL
Permit #: Expiration Date:9/20/2014
Proposed Top PZ Location:Sec:31 Twp: 5N 62W Footage: 516 FNL  439 FEL
Bottom Hole Location:Sec:31 Twp: 5N 62W Footage: 494 FSL  518 FEL
Proposed Depth/Form:11095 ft.
Surface Mineral Owner Same:No
Mineral Owner:FEESurface Owner:FEE
Unit: Unit Number:
Formation And Spacing:Code: NBRR , Formation: NIOBRARA , Order: , Unit Acreage: 240, Drill Unit: GWA
Casing:String Type: SURF, Hole Size: 13.5 in., Size: 9.625 in., Top: 0 ft., Depth: 410 ft., Weight: 36 , Citings Type: PLANNED
Cement:Sacks: 200, Top: 0 ft., Bottom: 410 ft.
Casing:String Type: 1ST, Hole Size: 8.75 in., Size: 7 in., Top: 0 ft., Depth: 6820 ft., Weight: 26 , Citings Type: PLANNED
Cement:Sacks: 500, Top: 2500 ft., Bottom: 6820 ft.
Casing:String Type: 1ST LINER, Hole Size: 6.125 in., Size: 4.5 in., Top: 6720 ft., Depth: 11095 ft., Weight: 11.6 , Citings Type: PLANNED
Cement:Sacks: , Top: , Bottom:

Wellbore Completed
Completion Date:10/17/2012
Spud Date:10/10/2012Spud Date Is:Actual
Measured TD:11050 ft.Measured PB depth:11050 ft.
True Vertical TD:6356 ft.True Vertical PB depth:6356 ft.
Top PZ Location:Sec:31 Twp: 5N 62WFootage: 516 FNL  439 FEL
Bottom Hole Location:Sec:31 Twp: 5N 62WFootage: 494 FSL  518 FEL
Log Types:Mudlog, CBL
Casing:String Type: SURF, Hole Size: 13.5 in., Size: 9.625 in., Top: 0 ft., Depth: 436 ft., Weight: 36 , Citings Type: ACTUAL
Cement:Sacks: 370, Top: 0 ft., Bottom: 436 ft., Determination Method: VISU
Casing:String Type: 1ST, Hole Size: 8.75 in., Size: , Top: 0 ft., Depth: 6947 ft., Weight: 26 , Citings Type: ACTUAL
Cement:Sacks: 483, Top: 1612 ft., Bottom: 6947 ft., Determination Method: CBL
Casing:String Type: 1ST LINER, Hole Size: 6.125 in., Size: 4.5 in., Top: 6883 ft., Depth: 11043 ft., Weight: 11.6 , Citings Type: ACTUAL
Cement:Sacks: , Top: , Bottom: , Determination Method:
FormationInterval TopLog BottomCoredDSTs
SHARON SPRINGS6299 ft.
NIOBRARA6481 ft.

Formation NBRR                     Formation Classification:  OW                     Status:  PR - 12/1/2025                 Interval Top: 7015 ft.    Interval Bottom: 11050 ft.

 Completed Information for Formation NIOBRARA
1st Production Date:11/23/2012Choke Size: 
Formation Name:NIOBRARACommingled:No
Production Method:
Open Hole Completion:Yes
Formation Treatment
Treatment Type:FRACTURE STIMULATION
Treatment Date:11/10/2012Treatment End Date:11/13/2012
Treatment Summary:18 stages: Niobrara pumped a total of 61906 bbls of fluid and 4212740 of sand, ATP 4216 psi, ATR 49.4 bpm, Final ISDP 3291 psi, completed with sliding sleeves and casing packers.
Total fluid used in treatment (bbls):61906Max pressure during treatment (psi):4996
Total gas used in treatment (mcf):0Fluid density (lbs/gal):8.34
Type Of gas:Number Of staged intervals:18
Total acid used in treatment (bbls):0Min frac gradient (psi/ft):0.93
Recycled water used in treatment (bbls):0Total flowback volume recovered (bbls):17024
Fresh water used in treatment (bbls):61906Disposition method For flowback:DISPOSAL
Total proppant used (lbs):4212740Green completions techniques utilized:Yes
Reason green techniques Not utilized: 
Tubing Size:2.875 in.Tubing Setting Depth:6197 ft.
Tubing Packer Depth:6196 ft.Tubing Multiple Packer:
Open Hole Top:Open Hole Bottom:
Initial Test Data:
Test Date:12/7/2012Test Method:Flowing
Hours Tested:72Gas Type:WET
Gas Disposal:SOLD
Test TypeMeasure
BBLS_H2O 792
BBLS_OIL 1134
BTU_GAS 1311
CALC_BBLS_H2O 267
CALC_BBLS_OIL 378
CALC_GOR 1143
CALC_MCF_GAS 432
CASING_PRESS 200
GRAVITY_OIL 43
MCF_GAS 1296
Perforation Data:
Interval Top:7015 ft.# Of Holes:
Interval Bottom:11050 ft.Hole Size:
Primary Well Designation:
None      i
            All DesignationsDate
Reported PluggedN 
Out Of Service RepurposedN 
Out Of ServiceN 
Inactive ExceptionN 
Noticed InactiveN 
Defined InactiveN 
Low ProducingN 

BOE/MCFE/GOR Calculations
Production for Previous 12 Months
January 2025 - December 2025i
Total Oil Produced (Barrels)1283
Total Gas Produced (MCF)1600
GOR1247
GOR DeterminationBOE
Average BOE per Day4.279
Average MCFE per Day24.809

 Federal Financial Assurance  i 

 Tribal Well  i No