Updates
Other Re-Entry Wells
- 16580, CLR, J. H. Skarphol 1-31H, Burke; Stoneview, re-entered the Bakken, 11/12; IP: 544, cum 97K 9/16; 320-acre spacing;
Original Post
I had completely forgotten about. Then a reader, tonight, sent me a note about an MRO well that was refracked.
Here's my post tonight on that subject.
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I opined not too long ago (I can't find the most recent post) that there are still debates whether re-fracks "will work" in the Bakken, and if so, how effective they will be. A reader sent in another example.
For background to this story:
- August 17, 2012: MRO and re-fracks/re-fracking
- December 18, 2011: re-fracking wells in the Bakken
- July 31, 2011: list of 25 MRO wells that might be candidates for re-fracking
16729, 348, MRO, Vihon 44-8H, this was a single-stage frack. MRO went in to re-frack and damaged the casing so the well was shut down for several months until they got it fixed; t11/07; cum 299K 9/16;
So, what's the story?
This well was originally spud and completed, as a one-stage frack, back in 2007.
It was subsequently re-fracked in 2011/2012, but ran into some difficulties before everything was "fixed."
Read the following production tables from bottom to top.
Following the one-stage frack, the well was spud/fracked with one stage back in November, 2011:
BAKKEN | 7-2008 | 31 | 3954 | 4032 | 1655 | 1802 | 1802 | 0 |
BAKKEN | 6-2008 | 30 | 4349 | 4643 | 1536 | 1911 | 1911 | 0 |
BAKKEN | 5-2008 | 31 | 4578 | 4110 | 1231 | 2133 | 2133 | 0 |
BAKKEN | 4-2008 | 27 | 3840 | 3625 | 1765 | 1702 | 1702 | 0 |
BAKKEN | 3-2008 | 27 | 2676 | 2837 | 965 | 131 | 131 | 0 |
BAKKEN | 2-2008 | 29 | 3593 | 3865 | 1471 | 232 | 232 | 0 |
BAKKEN | 1-2008 | 31 | 4530 | 4508 | 1813 | 742 | 742 | 0 |
BAKKEN | 12-2007 | 27 | 5453 | 5385 | 2202 | 158 | 158 | 0 |
BAKKEN | 11-2007 | 21 | 6155 | 5633 | 2854 | 0 | 0 | 0 |
Then, the re-fracked the well, sometime around the re-frack in late 2011/early 2012; the results were not good; they had problems, sort of unrelated to the re-frack per se:
BAKKEN | 6-2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 5-2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 4-2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 3-2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 2-2012 | 1 | 0 | 0 | 0 | 3 | 3 | 0 |
BAKKEN | 1-2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 12-2011 | 7 | 209 | 475 | 27 | 165 | 129 | 5 |
BAKKEN | 11-2011 | 30 | 1203 | 1160 | 232 | 907 | 690 | 37 |
BAKKEN | 10-2011 | 31 | 1264 | 1138 | 262 | 955 | 720 | 52 |
Once they got everything fixed:
BAKKEN | 4-2013 | 30 | 6898 | 7191 | 2312 | 2942 | 2452 | 310 |
BAKKEN | 3-2013 | 31 | 11101 | 11206 | 3746 | 4206 | 3361 | 659 |
BAKKEN | 2-2013 | 7 | 3126 | 2767 | 1055 | 483 | 364 | 80 |
BAKKEN | 1-2013 | 3 | 0 | 0 | 0 | 12 | 11 | 0 |
BAKKEN | 12-2012 | 31 | 4645 | 4848 | 1569 | 1483 | 1260 | 43 |
BAKKEN | 11-2012 | 30 | 11190 | 11629 | 3793 | 3898 | 3152 | 570 |
BAKKEN | 10-2012 | 11 | 2487 | 1678 | 298 | 364 | 107 | 204 |
When originally posted, the well was producing about 5,000 bo per month.
Current status:
- 16729, 348, MRO, Vihon 44-8H, Bailey, t11/07; cum 299K 9/16;
- The most important is the fact that folks like me will never know about these re-fracked wells if folks don't share their stories.
- The second story is, of course, all the wells that might be candidates for re-fracking.
- A third story: the more success stories we have, the more "we" will know whether re-fracking is worthwhile or not. It certainly looks like it might be.
- A fourth story: this changes the decline rates significantly, doesn't it?
- A fifth story: did EURs factor in these re-fracks?
- 17216, 327, MRO, Alfred Hansen 24-11H, Bailey, t2/09; cum 124K 10/13;
BAKKEN | 7-2012 | 20 | 4757 | 4450 | 4468 | 803 | 476 | 218 |
BAKKEN | 6-2012 | 9 | 18 | 0 | 0 | 66 | 0 | 12 |
BAKKEN | 5-2012 | 29 | 4110 | 3922 | 3565 | 1194 | 462 | 559 |
BAKKEN | 4-2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 3-2012 | 27 | 3093 | 3184 | 3711 | 934 | 516 | 256 |
BAKKEN | 2-2012 | 11 | 2445 | 2392 | 77 | 178 | 59 | 53 |
BAKKEN | 1-2012 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
BAKKEN | 12-2011 | 14 | 356 | 464 | 228 | 191 | 110 | 16 |
BAKKEN | 11-2011 | 30 | 877 | 931 | 553 | 492 | 276 | 36 |
BAKKEN | 10-2011 | 31 | 934 | 903 | 615 | 510 |
I am absolutely thrilled. I had this well, the Alfred Hansen on my list of 25 candidates for re-fracking. This was re-fracked. I'm sure there were others. I just don't have time to go through them all.
There is a lot of talk of CO2 EOR right now, but folks, there's a lot of work to do before we get to EOR. To begin with, there are 60,000 (or more) wells that need to be drilled (at 2,000/year). And that's just the middle Bakken and upper Three Forks. Add in in the lower benches of the Three Forks. Then re-fracking all the early wells that were fracked with one stage. Then, work-over of those wells that were adequately fracked but have deteriorated for some reason. Yes, as a laboratory it's nice to see folks testing CO2 EOR and water flooding, but there's plenty of work to do before we get to that.