Monday, June 17, 2019

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:
PoolDateDaysBBLS OilRunsBBLS WaterMCF ProdMCF SoldVent/Flare
BAKKEN4-20192713969140371112115102130001980
BAKKEN3-2019313053030763203183193630992792
BAKKEN2-20191524463240951726122628216001028
BAKKEN1-20190000000
BAKKEN12-20187329032904815216102161

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:
PoolDateDaysBBLS OilRunsBBLS WaterMCF ProdMCF SoldVent/Flare
BAKKEN4-20193032402324292721341430356635432
BAKKEN3-20192841224410423231254721531051356
BAKKEN2-20190000000
BAKKEN1-20190000000
BAKKEN12-201811449744975186547905479


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:
PoolDateDaysBBLS OilRunsBBLS WaterMCF ProdMCF SoldVent/Flare
BAKKEN4-20190000000
BAKKEN3-20190000000
BAKKEN2-201915675670000
BAKKEN1-201910186118611927000
BAKKEN12-20180000000

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