The CLR Colter Wells In Bear Creek

Disclaimer: these notes are to help me understand the Bakken. In a long note like this there will be typographical and factual errors. Much is left out. If this is important to you, go to the source.

Among many amazing details, note the drilling time when things go well -- vertical, three days; the curve, less than half a day; a long horizontal in three days. The operators in the Bakken are truly in their "manufacturing" stage. But with each well, they learn more about the geology. And the geology in the Bear Creek seems to have a different wrinkle -- and that might be an apt metaphor.

The wells:

• 32897, 863, CLR, Colter 14-14H, 37 stages, 7.1 million lbs, Bear Creek, t3/19; cum 72K 4/19;

From the file report:

• TD = 21,760 feet
• spud date: February 13, 2018
• TD date: February 25, 2018
• hole sizes: 13.5 inches to 2,454 feet; 8.75 inches to 11,637 feet; and, 6" to 21,760 feet
• within the Rocket prospect
• KOP: 14 feet below the upper Bakken
• vertical operations began February 12, 2018
• curve began on February 15, 2018; curve completed in 9.6 hours
• "Bakken shale collapse issues have been encountered in this region, and angles of intercept and shale exposure footage have become important data. CLR engineers have determined that entering the shales should be dont at angles no more than 65 - 68 degrees of inclination. On this well, the upper Bakken was intercepted at 67.74 degrees and exited at 76.96 degrees, with a total of 54' exposure. Fortunately, no shale collapse issues were experienced during drilling or the casing run."
• the shoe was drilled out on February 17, 2018
• sidetrack one was abandoned after striking the lower Bakken shale at 15,933 feet
• discussion re: the strike
• sidetrack 2 began at 13,690 feet
• background gas as high as 1500 units but generally much lower
• target was approx 13 feet thick, beginning 9 feet below the middle Bakken top, and extending to 22 feet below the same reference point

Production:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	4-2019	27	13969	14037	11121	15102	13000	1980
BAKKEN	3-2019	31	30530	30763	20318	31936	30992	792
BAKKEN	2-2019	15	24463	24095	17261	22628	21600	1028
BAKKEN	1-2019	0	0	0	0	0	0	0
BAKKEN	12-2018	7	3290	3290	4815	2161	0	2161

The next well:

• 32894, 1,563, CLR, Colter 11-14H2, 37 stages, 7.1 million lbs, Bear Creek, t3/19; cum 78K 4/19; 

From the file report:

• TD = 21,791 feet
• spud date: January 25, 2018
• TD date: March 14, 2018
• drilling operations began January 25, 2018
• vertical operations were completed on January 28, 2018
• the curve was started/completed on January 29, 2018
• drilling out of the shoe did not begin until March 11 
• so, if I read this correct: drilling time
  vertical: 3 days
• the curve: less than 1/2 day
• horizontal: 3 days
• trip gas in the horizontal hit 3,452 units
• gas average: 1500 - 2000 units
• target was 13.5 feet thick
• the target top was 7.5 feet below the internal 1 shale base
• the target extended to 21 feet below the same reference point

Production:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	4-2019	30	32402	32429	27213	41430	35663	5432
BAKKEN	3-2019	28	41224	41042	32312	54721	53105	1356
BAKKEN	2-2019	0	0	0	0	0	0	0
BAKKEN	1-2019	0	0	0	0	0	0	0
BAKKEN	12-2018	11	4497	4497	5186	5479	0	5479

The third well:

• 32892, n/d, CLR, Colter 9-14H, Bear Creek, t--; cum --;

From the file report:

• frack data pending
• TD = 21,800 feet
• spud date: December 13, 2017
• TD date: January 11, 2018
• vertical drilling began December 13, 2017, and was completed on the evening of December 15 (less then three full days)
• the curve took 11.25 hours
• some casing challenges
• drilled out of the shoe on December 21st; problems; the curve was re-built
• upon re-entry, things went "wonderfully"
• nice discussion of the curve build
• target zone: 13 feet thick; 9 feet below the middle Bakken top, extending to 22 feet below the same reference point
• discussion of major thickness differences in this area; increases risk of shale strikes

Production:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	4-2019	0	0	0	0	0	0	0
BAKKEN	3-2019	0	0	0	0	0	0	0
BAKKEN	2-2019	1	567	567	0	0	0	0
BAKKEN	1-2019	10	1861	1861	1927	0	0	0
BAKKEN	12-2018	0	0	0	0	0	0	0