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Saturday, March 2, 2024

A Re-Entered Vertical Madison Well -- March 2, 2024

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 --

MADISON6-196530718038000
MADISON5-196531773032000
MADISON4-196530768040000
MADISON3-196531831063000
MADISON2-196528769049000
MADISON1-196531817061000
MADISON12-196431869065000
MADISON11-196430850084000
MADISON10-196431866096000
MADISON9-196424782077000
MADISON8-196431935081000
MADISON7-1964311064093000
MADISON6-196417905079000

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:

MADISON5-20143141339317000
MADISON4-20143037440016000
MADISON3-20141316800000
MADISON2-20140000000
MADISON1-20140000000
MADISON12-20130000000
MADISON11-20130000000
MADISON10-201331000000
MADISON9-201330000000
MADISON8-20130000000
MADISON7-2013002080000
MADISON6-20130000000
MADISON5-20130000000
MADISON4-2013212362139000
MADISON3-20133133743113000

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:

PoolDateDaysBBLS OilRunsBBLS WaterMCF ProdMCF SoldVent/Flare
MADISON12-20233120662360232000
MADISON11-20233023382400289000
MADISON10-20233125082508269000
MADISON9-20233025512573319000
MADISON8-20233127802768128000
MADISON7-20233128222797259000
MADISON6-20233028982797419000
MADISON5-20232928702853563000
MADISON4-2023303301329934000
MADISON3-2023243119290532000
MADISON2-20230000000
MADISON1-202329288031053031000
MADISON12-202221343531573615000
MADISON11-202210170519641796000
MADISON10-202252180229000
MADISON9-2022151301915000
MADISON8-20225902034000
MADISON7-20223165260027000

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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