Hopefully, no errors of substance this time.
This is an incredibly interesting story on so many levels, but a huge shout out to the roughnecks and the safety team for a successful re-entry in a very dicey operation. This story speaks volumes about the skills, professionalism, can-do attitude of the entire team involved in this operation, and probably indicative of most operations in the Bakken. So without further ado, the new post.
Updates
July 31, 2018: huge mistake on my part regarding the Whitman wells. See comment from reader at the original post. Corrections and clarifications have been made -- continue reading.
First correction is easy:
- 20210, 803, CLR, Whitman 2-34H, Oakdale, API - 33-025-01259; t9/11; cum 1.595 million bbls 5/18; see production profile below; FracFocus: no re-frack; original frack, 24 stages; 2.4 million lbs sand; in addition to the 1.6 million bbls of oil, a cum of 1650315 MCF gas (275K boe natural gas -- so we're talking close to 2 million boe so far;
- spud date: January 19, 2011
- original TD date: April 23, 2011 -- to 13,681 feet, equivalent to a short lateral
- re-entry date: July 5, 2017
- TD date: July 8, 2017 (only three days to drill to depth after re-entry)
- TD: 21,230 feet
- an Upper Devonian Three Forks well within the Rocket prospect
- introduction: Well drilling operations ceased on April 23, 2011, after dangerous levels of oil and gas pressure rendered further drilling unwise at the time. The well has been in production in its incomplete form (13681' MD reached, open hole, no fracking) since that time and has produced approximately 120,000 bbls of petroleum.
- this report primarily concerns re-entry drilling information only, as complete data from the original drilling was generated by a different mud-logging company and is at points incomplete. Where available, salient points from the original drilling events have been included.
- the well plan ... three scenarios were foreseen ... the rig operators prepared for all events, the high-pressure scenario being the most dangerous, but likely manageable...
- original (back in 2011) drilling efforts ceased at 13681' MD for high (dangerous) levels of oil and gas pressures. As of 2017, these were deemed low enough for re-entry to attempt drilling to the originally planned TD point, hopefully to produce at least moderate amounts of oil, as indicated by original production levels.
- background gas levels were initially 600 - 1200 units with circulation through the gas buster, which was activated after the first trip gas at 10,000 units. This well had been hard to control when the first segment was drilled in 2011, so all precautions for safety and control were observed.
- gas increased to 1800 - 2200 units at 17500' MD, when the formation took a relatively sharp turn and then rolled over, similar to the structure observed from the initial segment and may have signaled a fracture and/or stratigraphic trap of less, but still significant, production as the first one.
- the Upper Devonian Three Forks formation was intercepted at 11596' TVD ( ~ 8618' SS).
- it was determined initially that the ideal target would be approximately 15' thick, beginning 15' below the Three Forks top, and extending to 30' below the same reference point.
Original Post
Is Something Going On With CLR's Whitman Wells?
Yup: A Re-Entry And Frack Of A Well That Was "Aborted" Back In 2011 Due To Dangerous Gas Levels
Section 34-147-96, Oakdale oil field; only three older wells sited in this section. One was off-line for a few months recently and is now back on line; the other two are now off line. FrackFocus will be checked.
The wells:
- 17061, 664, CLR, Whitman 11-34H, Oakdale, API - 33-025-00723; t6/08; cum 446K 5/18; see production profile below; FracFocus: no re-frack;
- 20210, 803, CLR, Whitman 2-34H, Oakdale, API - 33-025-01259; t9/11; cum 1.595 million bbls 5/18; see production profile below; FracFocus: no re-frack; original frack, 24 stages; 2.4 million lbs sand; in addition to the 1.6 million bbls of oil, a cum of 1650315 MCF gas (275K boe natural gas -- so we're talking close to 2 million boe so far;
- 20212, 482, CLR, Whitman 3-34H, Oakdale, API - 33-025-01261; t9/11; cum 181K 5/18; see production profile below; well, isn't this interesting -- yup, this well was fracked 9/23/17 - 10/5/17; 9.8 million gallons of water; 84% water; 15% sand; sundry form in file report: 61 stages; 14.5 million lbs sand;
17061:
Pool | Date | Days | BBLS Oil | Runs | BBLS Water | MCF Prod | MCF Sold | Vent/Flare |
---|---|---|---|---|---|---|---|---|
BAKKEN | 5-2018 | 31 | 2378 | 2220 | 154 | 2695 | 2394 | 54 |
BAKKEN | 4-2018 | 30 | 2371 | 2166 | 160 | 2724 | 2484 | 0 |
BAKKEN | 3-2018 | 31 | 2440 | 2387 | 152 | 2619 | 2342 | 30 |
BAKKEN | 2-2018 | 28 | 2294 | 2581 | 111 | 2251 | 2027 | 0 |
BAKKEN | 1-2018 | 6 | 496 | 0 | 40 | 351 | 303 | 0 |
BAKKEN | 12-2017 | 1 | 0 | 0 | 0 | 11 | 11 | 0 |
BAKKEN | 11-2017 | 2 | 0 | 0 | 0 | 22 | 22 | 0 |
BAKKEN | 10-2017 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 9-2017 | 7 | 420 | 545 | 30 | 669 | 613 | 0 |
BAKKEN | 8-2017 | 31 | 1972 | 2157 | 114 | 3054 | 2806 | 0 |
BAKKEN | 7-2017 | 31 | 1982 | 1811 | 115 | 2914 | 2448 | 218 |
20210 (a huge, huge well):
Pool | Date | Days | BBLS Oil | Runs | BBLS Water | MCF Prod | MCF Sold | Vent/Flare |
---|---|---|---|---|---|---|---|---|
BAKKEN | 5-2018 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 4-2018 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 3-2018 | 0 | 0 | 221 | 0 | 0 | 0 | 0 |
BAKKEN | 2-2018 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 1-2018 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 12-2017 | 2 | 0 | 0 | 19 | 0 | 0 | 0 |
BAKKEN | 11-2017 | 3 | 22 | 0 | 21 | 1 | 0 | 0 |
BAKKEN | 10-2017 | 3 | 2 | 38 | 0 | 1 | 0 | 0 |
BAKKEN | 9-2017 | 16 | 3829 | 3858 | 232 | 4800 | 4703 | 0 |
BAKKEN | 8-2017 | 31 | 9112 | 9143 | 428 | 10829 | 10590 | 0 |
BAKKEN | 7-2017 | 26 | 6257 | 6352 | 117 | 6851 | 5326 | 1380 |
BAKKEN | 6-2017 | 30 | 9377 | 9406 | 333 | 11517 | 11284 | 0 |
BAKKEN | 5-2017 | 31 | 10218 | 10106 | 357 | 12107 | 11861 | 0 |
BAKKEN | 4-2017 | 28 | 8004 | 8101 | 327 | 9332 | 8923 | 220 |
BAKKEN | 3-2017 | 31 | 10149 | 10137 | 318 | 11626 | 11381 | 0 |
BAKKEN | 2-2017 | 28 | 9545 | 9446 | 285 | 10713 | 10494 | 0 |
BAKKEN | 1-2017 | 31 | 10635 | 10757 | 350 | 12042 | 11508 | 297 |
BAKKEN | 12-2016 | 31 | 10697 | 10584 | 315 | 11582 | 11354 | 0 |
BAKKEN | 11-2016 | 29 | 10539 | 10689 | 355 | 11311 | 11096 | 0 |
BAKKEN | 10-2016 | 31 | 11462 | 11484 | 315 | 12258 | 12010 | 0 |
BAKKEN | 9-2016 | 19 | 8745 | 8486 | 137 | 8366 | 8217 | 0 |
BAKKEN | 8-2016 | 0 | 0 | 237 | 0 | 0 | 0 | 0 |
BAKKEN | 7-2016 | 30 | 10534 | 10558 | 350 | 11332 | 10035 | 1065 |
BAKKEN | 6-2016 | 30 | 11354 | 11279 | 440 | 12596 | 8945 | 3412 |
BAKKEN | 5-2016 | 31 | 12067 | 11991 | 479 | 14115 | 13656 | 212 |
BAKKEN | 4-2016 | 27 | 10189 | 10128 | 528 | 11146 | 10973 | 0 |
20212:
Pool | Date | Days | BBLS Oil | Runs | BBLS Water | MCF Prod | MCF Sold | Vent/Flare |
---|---|---|---|---|---|---|---|---|
BAKKEN | 5-2018 | 0 | 0 | 403 | 0 | 0 | 0 | 0 |
BAKKEN | 4-2018 | 16 | 3239 | 3127 | 473 | 2465 | 2376 | 0 |
BAKKEN | 3-2018 | 19 | 5486 | 5631 | 756 | 4317 | 4139 | 50 |
BAKKEN | 2-2018 | 25 | 5310 | 5088 | 595 | 4445 | 4261 | 0 |
BAKKEN | 1-2018 | 31 | 10513 | 10725 | 1869 | 8937 | 8641 | 50 |
BAKKEN | 12-2017 | 31 | 21903 | 21790 | 4841 | 24087 | 23839 | 0 |
BAKKEN | 11-2017 | 30 | 19452 | 19809 | 5379 | 19667 | 18479 | 968 |
BAKKEN | 10-2017 | 21 | 12150 | 11401 | 6847 | 13549 | 7191 | 6268 |
BAKKEN | 9-2017 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 8-2017 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 7-2017 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 6-2017 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 5-2017 | 1 | 0 | 0 | 2 | 0 | 0 | 0 |
BAKKEN | 4-2017 | 5 | 380 | 363 | 98 | 115 | 114 | 0 |
BAKKEN | 3-2017 | 6 | 157 | 320 | 0 | 108 | 99 | 0 |
BAKKEN | 2-2017 | 4 | 162 | 170 | 0 | 174 | 0 | 158 |
BAKKEN | 1-2017 | 3 | 158 | 284 | 0 | 154 | 0 | 153 |
BAKKEN | 12-2016 | 2 | 147 | 0 | 0 | 162 | 0 | 146 |
BAKKEN | 11-2016 | 3 | 152 | 184 | 0 | 5 | 0 | 0 |
BAKKEN | 10-2016 | 2 | 151 | 278 | 2 | 123 | 115 | 0 |
BAKKEN | 9-2016 | 3 | 148 | 0 | 0 | 3 | 0 | 0 |
BAKKEN | 8-2016 | 2 | 141 | 0 | 2 | 80 | 0 | 80 |
BAKKEN | 7-2016 | 7 | 189 | 203 | 25 | 89 | 88 | 0 |
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