Locator: 46650B.
The well:
- 3550, 140, Empire North Dakota, Waddle-Olson 1, spud 5/64; cum 217K 12/23; drilled as a vertical Madison well sixty years ago, and re-entered as a horizontal well in October, 2022.
This vertical Madison well was re-entered in October, 2022. The build section began on October 28, 2022. The landing was achieved at 3520' MD / 1866' TVDSS. Very shallow compared to Bakken wells at depths of 8,000 to 9,000 feet.
TD was reached on October 31, 2022, at 5,220' MD / 3326.7' TVD / 1871.7 TVDSS (true vertical depth below sea level). This is a conventional pool, not shale, and thus not fracked.
The original vertical well was drilled back in 1964 -- sixty years ago -- and this was the initial production: all oil, no gas, and very little water --
| MADISON | 6-1965 | 30 | 718 | 0 | 38 | 0 | 0 | 0 |
| MADISON | 5-1965 | 31 | 773 | 0 | 32 | 0 | 0 | 0 |
| MADISON | 4-1965 | 30 | 768 | 0 | 40 | 0 | 0 | 0 |
| MADISON | 3-1965 | 31 | 831 | 0 | 63 | 0 | 0 | 0 |
| MADISON | 2-1965 | 28 | 769 | 0 | 49 | 0 | 0 | 0 |
| MADISON | 1-1965 | 31 | 817 | 0 | 61 | 0 | 0 | 0 |
| MADISON | 12-1964 | 31 | 869 | 0 | 65 | 0 | 0 | 0 |
| MADISON | 11-1964 | 30 | 850 | 0 | 84 | 0 | 0 | 0 |
| MADISON | 10-1964 | 31 | 866 | 0 | 96 | 0 | 0 | 0 |
| MADISON | 9-1964 | 24 | 782 | 0 | 77 | 0 | 0 | 0 |
| MADISON | 8-1964 | 31 | 935 | 0 | 81 | 0 | 0 | 0 |
| MADISON | 7-1964 | 31 | 1064 | 0 | 93 | 0 | 0 | 0 |
| MADISON | 6-1964 | 17 | 905 | 0 | 79 | 0 | 0 | 0 |
Day in, day out, the well was active, for fifty years, not taken off line until 2013 for a bit longer than a year.
At that time, production:
| MADISON | 5-2014 | 31 | 413 | 393 | 17 | 0 | 0 | 0 |
| MADISON | 4-2014 | 30 | 374 | 400 | 16 | 0 | 0 | 0 |
| MADISON | 3-2014 | 13 | 168 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 2-2014 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 1-2014 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 12-2013 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 11-2013 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 10-2013 | 31 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 9-2013 | 30 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 8-2013 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 7-2013 | 0 | 0 | 208 | 0 | 0 | 0 | 0 |
| MADISON | 6-2013 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 5-2013 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 4-2013 | 21 | 236 | 213 | 9 | 0 | 0 | 0 |
| MADISON | 3-2013 | 31 | 337 | 431 | 13 | 0 | 0 | 0 |
Then, as noted, the well was re-entered and a lateral drilled for about 3,000 feet (landing about 2000' and ending with a TD of 5,220'MD). Production after the lateral was complete:
| Pool | Date | Days | BBLS Oil | Runs | BBLS Water | MCF Prod | MCF Sold | Vent/Flare |
|---|---|---|---|---|---|---|---|---|
| MADISON | 12-2023 | 31 | 2066 | 2360 | 232 | 0 | 0 | 0 |
| MADISON | 11-2023 | 30 | 2338 | 2400 | 289 | 0 | 0 | 0 |
| MADISON | 10-2023 | 31 | 2508 | 2508 | 269 | 0 | 0 | 0 |
| MADISON | 9-2023 | 30 | 2551 | 2573 | 319 | 0 | 0 | 0 |
| MADISON | 8-2023 | 31 | 2780 | 2768 | 128 | 0 | 0 | 0 |
| MADISON | 7-2023 | 31 | 2822 | 2797 | 259 | 0 | 0 | 0 |
| MADISON | 6-2023 | 30 | 2898 | 2797 | 419 | 0 | 0 | 0 |
| MADISON | 5-2023 | 29 | 2870 | 2853 | 563 | 0 | 0 | 0 |
| MADISON | 4-2023 | 30 | 3301 | 3299 | 34 | 0 | 0 | 0 |
| MADISON | 3-2023 | 24 | 3119 | 2905 | 32 | 0 | 0 | 0 |
| MADISON | 2-2023 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MADISON | 1-2023 | 29 | 2880 | 3105 | 3031 | 0 | 0 | 0 |
| MADISON | 12-2022 | 21 | 3435 | 3157 | 3615 | 0 | 0 | 0 |
| MADISON | 11-2022 | 10 | 1705 | 1964 | 1796 | 0 | 0 | 0 |
| MADISON | 10-2022 | 5 | 218 | 0 | 229 | 0 | 0 | 0 |
| MADISON | 9-2022 | 15 | 130 | 191 | 5 | 0 | 0 | 0 |
| MADISON | 8-2022 | 5 | 90 | 203 | 4 | 0 | 0 | 0 |
| MADISON | 7-2022 | 31 | 652 | 600 | 27 | 0 | 0 | 0 |
Knowing not much about this, but this seems to be quite a successful test. Conventional pools tend not to decline like Bakken shale wells, so this wells should produce at 2,500 bopm for quite some time. We'll see.
But there you have it. A re-entered vertical Madison wells with a short lateral.
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