First, the production profile for this particular well which I will identify later on in the post. But first, some data.
- an old CLR well
- a vertical well (not a horizontal)
- proposed:pay thickness: 5'; zone of interest, 10,652 to 10,660 feet (8 feet)
- proposed:the pool targeted was the Sanish (Three Forks?); top of Three Forks at 10,648 ft; TD at 10,772 feet
- actual: the Three Forks was entered at 10,648 feet; the Sanish was encountered at 10,655 feet; drill stem test #1 was conducted exclusively over the Sanish sand from 10,642' to 10,660' (18 feet)
- actual: perforation record: 10,650' to 10,660'
- this well has never produced more than about 800 bbls/month since it was first drilled back in 1990
- exception: first full month: 2,363 bbls; and then quickly dropped to 700 bbls/month over the next few months; since then about 500 - 750 bbls/month for 15 years, day in, day out
- then note: it was taken off line 6/15? Why? A neighboring horizontal was being fracked -- see graphic down below
- note the spectacular jump in production for the next 8 months
- also note the amount of water produced after it was placed back on line; after the neighboring well was fracked
- again, this was an old, old vertical well -- probably met definition of a stripper well
- more recently it was taken off line again because of neighboring wells that were being fracked
Pool | Date | Days | BBLS Oil | Runs | BBLS Water | MCF Prod | MCF Sold | Vent/Flare |
---|---|---|---|---|---|---|---|---|
SANISH | 5-2016 | 22 | 11 | 0 | 7 | 75 | 0 | 75 |
SANISH | 4-2016 | 2 | 3 | 128 | 0 | 0 | 0 | 0 |
SANISH | 3-2016 | 15 | 706 | 696 | 65 | 699 | 0 | 699 |
SANISH | 2-2016 | 29 | 3514 | 3579 | 485 | 3495 | 0 | 3495 |
SANISH | 1-2016 | 31 | 3804 | 3869 | 678 | 3733 | 0 | 3733 |
SANISH | 12-2015 | 31 | 3304 | 3074 | 901 | 3308 | 0 | 3308 |
SANISH | 11-2015 | 30 | 3535 | 3832 | 1220 | 3575 | 0 | 3575 |
SANISH | 10-2015 | 31 | 4242 | 4220 | 1547 | 4263 | 0 | 4263 |
SANISH | 9-2015 | 30 | 6052 | 6280 | 1722 | 5991 | 0 | 5991 |
SANISH | 8-2015 | 31 | 6340 | 6139 | 2202 | 6394 | 0 | 6394 |
SANISH | 7-2015 | 23 | 4022 | 3688 | 2753 | 3935 | 0 | 3935 |
SANISH | 6-2015 | 0 | 0 | 203 | 0 | 0 | 0 | 0 |
SANISH | 5-2015 | 27 | 636 | 611 | 105 | 75 | 0 | 75 |
SANISH | 4-2015 | 29 | 764 | 641 | 140 | 51 | 0 | 51 |
SANISH | 3-2015 | 31 | 764 | 1067 | 105 | 0 | 0 | 0 |
SANISH | 2-2015 | 28 | 690 | 651 | 105 | 0 | 0 | 0 |
SANISH | 1-2015 | 31 | 796 | 916 | 122 | 0 | 0 | 0 |
SANISH | 12-2014 | 20 | 553 | 449 | 103 | 0 | 0 | 0 |
Okay, so what well was it?
- 12979, 192, CLR, Gudbranson 1, Antelope, Sanish pool, vertical, t11/1990; cum 152K 5/16;
- first, note the "index" well, a vertical well, #12979, drilled back in 1990
- also, note three other vertical wells in the immediate area that are just as old (red arrows).
- now, note how closely the horizontal from #28332 passes by the old vertical well, #12979
So, when was #28332 fracked? I'll answer that after we look at the production profile.
The production profile of #28332, the horizontal well:
Pool | Date | Days | BBLS Oil | Runs | BBLS Water | MCF Prod | MCF Sold | Vent/Flare |
---|---|---|---|---|---|---|---|---|
SANISH | 5-2016 | 31 | 22325 | 22173 | 4144 | 28701 | 28593 | 93 |
SANISH | 4-2016 | 30 | 23647 | 23655 | 4199 | 31777 | 31672 | 90 |
SANISH | 3-2016 | 31 | 26693 | 26656 | 4441 | 35180 | 35071 | 93 |
SANISH | 2-2016 | 29 | 19669 | 19907 | 4034 | 23697 | 23596 | 87 |
SANISH | 1-2016 | 31 | 20685 | 20444 | 4563 | 25673 | 24064 | 1593 |
SANISH | 12-2015 | 31 | 18685 | 18685 | 4638 | 23461 | 22727 | 718 |
SANISH | 11-2015 | 30 | 21789 | 22063 | 6473 | 26528 | 26312 | 201 |
SANISH | 10-2015 | 31 | 17941 | 17375 | 6905 | 24184 | 23324 | 845 |
SANISH | 9-2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
SANISH | 8-2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
SANISH | 7-2015 | 3 | 1360 | 1360 | 0 | 2585 | 0 | 2585 |
SANISH | 6-2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
This well was fracked 6/6/2015, the very month that the Gudbranson vertical well was taken off-line and then the spectacular jump in production the very next month.
- 28332, 1,373, CLR, Salers Federal 4-27H1, Antelope, Sanish pool, 30 stages, 6.1 million lbs sand/ceramic, fracked 6/15; t10/15; cum 173K 5/15;
#4168, production profile, drilled in 1966, still active:
SANISH | 11-2015 | 22 | 161 | 486 | 0 | 0 | 0 | 0 |
SANISH | 10-2015 | 28 | 218 | 0 | 0 | 0 | 0 | 0 |
SANISH | 9-2015 | 12 | 171 | 466 | 0 | 0 | 0 | 0 |
SANISH | 8-2015 | 17 | 258 | 0 | 0 | 0 | 0 | 0 |
SANISH | 7-2015 | 13 | 218 | 0 | 0 | 0 | 0 | 0 |
SANISH | 6-2015 | 7 | 308 | 444 | 0 | 0 | 0 | 0 |
SANISH | 5-2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
SANISH | 4-2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
SANISH | 3-2015 | 2 | 150 | 0 | 0 | 0 | 0 | 0 |
SANISH | 2-2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
#12198, production profile, drilled in 1988, still active:
SANISH | 10-2015 | 31 | 2186 | 2149 | 215 | 2448 | 0 | 2200 |
SANISH | 9-2015 | 30 | 2441 | 2389 | 194 | 2545 | 0 | 2305 |
SANISH | 8-2015 | 31 | 2386 | 2417 | 356 | 2556 | 0 | 2308 |
SANISH | 7-2015 | 25 | 921 | 1045 | 807 | 1330 | 0 | 1148 |
SANISH | 6-2015 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
SANISH | 5-2015 | 27 | 529 | 441 | 75 | 271 | 24 | 81 |
SANISH | 4-2015 | 30 | 589 | 445 | 12 | 463 | 172 | 51 |
#12643, production profile, drilled in 1989, still active (blue bold is water):
SANISH | 4-2016 | 30 | 1168 | 1339 | 38 | 1405 | 0 | 1165 |
SANISH | 3-2016 | 31 | 2456 | 2345 | 146 | 2690 | 0 | 2442 |
SANISH | 2-2016 | 29 | 2934 | 2837 | 257 | 3110 | 0 | 2879 |
SANISH | 1-2016 | 31 | 2689 | 2892 | 317 | 2903 | 0 | 2655 |
SANISH | 12-2015 | 31 | 2560 | 2381 | 222 | 2789 | 0 | 2541 |
SANISH | 11-2015 | 30 | 2832 | 3040 | 360 | 3054 | 0 | 2814 |
SANISH | 10-2015 | 31 | 3829 | 3733 | 253 | 4098 | 0 | 3866 |
SANISH | 9-2015 | 30 | 5924 | 6313 | 369 | 5872 | 0 | 5632 |
SANISH | 8-2015 | 31 | 6913 | 6557 | 772 | 6946 | 0 | 6698 |
SANISH | 7-2015 | 29 | 3314 | 3122 | 1568 | 3481 | 0 | 3299 |
SANISH | 6-2015 | 2 | 105 | 237 | 0 | 0 | 0 | 0 |
SANISH | 5-2015 | 8 | 97 | 238 | 0 | 76 | 7 | 21 |
SANISH | 4-2015 | 9 | 185 | 0 | 0 | 92 | 11 | 9 |
SANISH | 3-2015 | 2 | 80 | 225 | 0 | 8 | 0 | 0 |
SANISH | 2-2015 | 2 | 55 | 0 | 0 | 22 | 6 | 0 |
SANISH | 1-2015 | 13 | 311 | 246 | 0 | 96 | 0 | 0 |
SANISH | 12-2014 | 2 | 101 | 0 | 0 | 16 | 0 | 0 |
SANISH | 11-2014 | 26 | 533 | 702 | 0 | 192 | 0 | 0 |
I only looked at the data of one horizontal well; there are many other horizontal wells in the immediate area that were also fracked at various times.
Note: in a long note like this, there will be typographical and factual errors. I may be seeing things that do not exist. I may be "over-reading" things. I may be misinterpreting data. I may be cherry picking data. If this information is important to you, go to the source.
In the big scheme of things, this is not a big deal. The increased production only lasts a few months, maybe up to a year. But if one has mineral rights, one might be surprised at a jump in one's "mailbox money." In addition, it helps me understand, or at least think about, water flooding in the middle Bakken and Three Forks (sandstone, dolomite, NOT shale). One can also get a feel for how far -- radially -- fracking is effective. I continue to opine that fracking "only goes out about 500 feet radially." This helps one understand how close the horizontals can be / should be placed.
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