Random Update Of The Antelope Oil Field -- In Progress -- December 3, 2019

The Antelope oil field is tracked here.

Size:

• There are 77.5 sections in that oil field
• 76 are 640-acre sections (or thereabouts)
• 3 are half-sections (320 acres or thereabouts)
• Total: 49,600 acres
• A rectangle of 10 sections by 8 sections would be 80 sections
• A section is a mile x a mile
• Therefore, if the field were a perfect rectangle, it would be about 10 miles x 8 miles.

Spacing:

• there are six 320-acre spacing units
• there are ten 640-acre spacing units
• other than the 320-acre units and the 640-acre units, the rest are 1280-acre units
• it appears most of the field is also spaced with overlapping 2560-acre units 

There are currently 294 wells in the Antelope oil field.

49,600 acres / 294 wells = one well for every 168.71 acres, or about four wells for every section, or eight wells in every 1280-acre spacing unit.

Monthly production in most recent report: 1,395,082 bbls/month, or 46,502 bopd.

1,395,082/294 =  4,745 bbls//month/well.

 

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From the NDIC monthly production database, September, 2019, data, most recent data available:

In that field the following operators have this number of wells, September, 2019, production in bbls:

• Bruin: 58 -- 358,406 bbls --
• BR: 1 -- 4,252 bbls --
• CLR: 41 --42,421 bbls --
• Enerplus: 29 -- 124,810 bbls --
• EOG: 9 -- 61,088 bbls --
• Hess: 66 -- 187,500 bbls --
• MRO: 45 -- 219,009 bbls --
• Petrogulf: 4 -- 11,898 bbls --
• PetroShale: 6 -- 99,118 bbls --
• White Butte: 3 -- 6,776 bbls --
• WPX: 21 -- 201,788 bbls --
• XTO: 11 -- 78,016 bbls  --

PetroShale's six wells (permit number) and cum and production/most recent month (all six wells are in section 17-152-94; all are 1280-acre spacing except for #11686, quarter section):

• 33010, 1,391, PetroShale, PetroShale US 12H, t8/19; cum 71K 10/19; 32,703 bbls,
• 33204, 1,934, PetroShale, PetroShale US 13H, t5/19; cum 118K 10/19; 36,327 bbls,
• 33005, 1,560, PetroShale, PetroShale US 3H, t3/18; cum 408K 10/19; 11,128 bbls,
• 33004, 537, PetroShale, PetroShale US 4H, t3/18; cum 319K 10/19; 10,685 bbls,
• 32767, 2,759, PetroShale, PetroShale US 8H, t1/17; cum 480K 10/19; 7,576 bbls,
• 11686, 1,82, PetroShale, Pronghorn 1, t12/85 (no typo: December, 1985); cum 175K 10/19; 699 bbls; spacing: 160 acres; vertical well; F;

Sorted by production / well / most recent month:

Operator	Wells	Crude Oil	Bbls/Well/Month
PetroShale	6	99,118	16,520
WPX	21	201,788	9,609
XTO	11	78,016	7,092
EOG	9	61,088	6,788
Bruin	58	358,406	6,179
MRO	45	219,009	4,867
Enerplus	29	124,810	4,304
BR	1	4,252	4,252
Petrogulf	4	11,898	2,975
Hess	66	187,500	2,841
White Butte	3	6,776	2,259
CLR	41	42,421	1,035

From the file report, #11686:

• operator at time of initial spud: General Atlantic Energy Corporation
• an 80-acre infill well on the Antelope Anticline 
• a vertical well; not fracked
• spud date: October 23, 1985
• cease drilling: November 25, 1985
• General Atlantic holds the rights only to the Bakken-Sanish. Deeper and shallower pays are held by Amerada.
• TD: 10,535 feet 
• open hole completion from 10,430 feet to 10,535 feet
• IP: 182.5 bbls/24 hours
• 1992: transferred to Ranch Operating Company from Presidio Exploration
• July 6, 1995: meets criteria for stripper well status
• November 13, 2013: letter stating that the well had been re-entered; drilled an additional 20 feet, and perforations shot from 10,520 - 10,533 feet and 10,556 - 10,571 feet
• May 19, 2016: transferred from Ranch Oil Co. to PetroShale (US) Inc
• last sundry form of note 
• status: still flowing;