In the last edition of The Rocky Mountain Oil Journal, it was noted that Marathon has moved one of its H&P rigs to the Big Lake in attempt to establish Bakken production thereunder. This Marathon activity is apparently unrelated to the breaking story on Fox News regarding the bonanza that awaits them.
Marathon Oil Drilling Under Lake Sakakawea-McKenzie County North Dakota
Marathon Oil has spud in their second horizontal Bakken test in McKenzie County North Dakota. The company has moved in Helmrich & Payne rig #256 and is making hole at the Myrmidon #1-2H ne-ne 2-151n-94w. Bottom hole location for this test will be the sw-sw 11-151n-94w. Of interest, this will be the first North Dakota horizontal Bakken test that will attempt to establish production beneath Lake Sakakawea, the third largest man-made lake in the United States, after Lake Mead and Lake Powell. This reservoir has a length of about 178 miles and contains roughly 1,320 miles of shoreline.
Originally the Myrmidon #1-2H prospect was generated by Black Rock Resources (BRR), a consortium of several companies including Savant Oil and Gas, Castle Rock Resources, Kirkwood Oil and Gas, and several individuals. The acreage that Marathon is drilling on is part of a 100,000 acre lease block that BRR sold to Marathon Oil for a reported $43 million. Prior to this sale, BRR had asked and received permission to create a 1,280 acre spacing drilling unit that included all of section 2 and 11 of 151n-94w. In supporting the request for the creation of this horizontal Bakken drilling unit before the Industrial Commission, the following reservoir and economic data was presented at the hearing:
Bakken Reservoir and Recovery Data
Reservoir Type Middle Bakken Silty Dolomite
Spacing 1280 acres
Stimulation Type Gelled Water/Sand Frac
Reservoir Thickness 38 ft
Porosity 9%
Water Saturation 25%
Oil Gravity 42 degrees API
GOR 800 scf/stb
Oil Formation Volume Factor 1.5 Res. BBL/STBO
OOIP 16,981,000 bbls
EUR 800,000 BBLS
Recovery Factor 5.5%
Well Economics
Capital Cost $6,000,000
Expected IP: 650 BOPD
Ultimate Recovery 800,000 BBLS Oil
960,000 Mcf Gas
Royalty Burden 20%
Operating Cost $6,000 per month
Prices $60/bbl Constant Oil Price
$6.50/MMbtu Constant Gas Price
Economic Projections
Future Net Revenue $4,590,000
Operating Costs $2,041,000
Production Taxes $5,048,000
Rate of Return >100%
Undiscounted Return on Investment 6.5
Bear in mind, that when BBR presented this data to the Industrial Commission, the company used a constant oil price of $60 per barrel. Current Williston Basin sweet is now selling for $112.75 per barrel.
Nearest Bakken penetration to the Myrmidon #1-2H is about a mile to the northwest at a field well within Antelope Field, a multi-pay oil pool. Originally drilled by Comdisco Operating and now controlled by Chesapeake Operating, the Gudbranson #1 nw-se 34-152n-34w was completed pumping 192 bopd and 96 mcfgpd from the vertical Sanish section 10,650’-10,660’. Since first being put on production in the latter part of 1990, this well has cumulated over 91,349 bo, 88.5 mcfg and 3,467 bw. Antelope Field itself is a southeast plunging anticline and was discovered in 1953. Producing from the Devonian, Madison, Red River, Sanish, Silurian and Winnipeg/Deadwood, this field has produced over 41.3 mmbo, 61.6 bcfg and 46.4 mmbw.
As mentioned, the Myrmidon #1-2H is the second Bakken test drilled by Marathon Oil in McKenzie County. The first sideways test drilled by the company scales about 36 miles southwest at the Dolezal #24-24H se-sw 24-146n-99w. Completed in November of 2006, this single lateral Bakken producer was given an IP of 82 bopd, 68 mcfgpd and 103 bwpd. Incorporated into Ranch Creek Field, the Dolezal #24-24H has produced over 29.3 k bo and 33 mmcfg. Ranch Creek Field is a Bakken oil pool discovered by PDC Corporation at the Carmona #31-1H ne-nw 1-146n-99w. Marathon Oil has now assumed operatorship of this discovery well.
Content courtesy of The Rocky Mountain Oil Journal