A Confusing Well; Perhaps A Reader Has Insight -- August 19, 2017

Updates

May 18, 2019: #26419 and #17356 are about 100 feet to the west of #26007 and #26006.

November 28, 2017: regardless of what's going on, this is an incredible well:

• 31310, 1,179, Hess, AN-Brenna-LW-153-94-3130H-1, Antelope, Sanish pool, t9/16; cum 227K 11/17; 

Monthly Production Data:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
SANISH	9-2017	30	13377	13642	6945	44359	42966	1093
SANISH	8-2017	26	15274	15146	5110	31773	27509	4033
SANISH	7-2017	31	16424	16401	6320	46744	46007	430
SANISH	6-2017	30	19723	19472	5399	43560	38639	4621
SANISH	5-2017	31	19771	20015	3508	32290	28507	3482
SANISH	4-2017	30	12444	12253	1654	18123	17822	1
SANISH	3-2017	29	14195	14474	2132	20791	20492	35
SANISH	2-2017	28	12718	12516	2195	18252	17997	8
SANISH	1-2017	31	20091	20018	2767	31412	25040	6075
SANISH	12-2016	27	16638	16576	2523	24874	12254	12367
SANISH	11-2016	30	19632	19657	3424	24274	6190	17785
SANISH	10-2016	31	19956	20622	5398	28515	706	27499
SANISH	9-2016	13	20717	19686	4276	26433	1	26312

Original Post

Disclaimer: in a long note like this there will be factual and typographical errors. I may be seeing things that don't exist. If this is important to you, go to the source.

Look at this post. I am still unable to explain the jump in production in 9/16 of #25961. [Update, January, 2018: just prior to the jump in production: a work-over rig on site, and a new pump put in; no evidence that is was re-fracked; no sundry form to suggest a re-frack and FracFocus does not show a re-frack.]

Note that all three wells on this 3-well pad were taken off-line 8/16, and then brought back on line in the next month or so. Generally, when one sees that, it means that a neighboring well was fracked.

In this case, when I originally looked at these three wells, I could find no evidence of a neighboring well being fracked.

Today, I took another look.

It turns out a neighboring well was fracked 8/16, the very month that these three wells were taken off-line.

But it still doesn't make sense.

All three wells showed a bump in production, though the Three Forks wells showed a minimum jump in production whereas the middle Bakken well showed a hug jump in production (from 5,000 bbls/month to 14,000 bbls / month). The jump in production did not last particularly long, but it's hard to believe the jump in production from 6,000 bbl/s month to 14,000 bbls/month was due to "recharging" when the well was off-line for less than a month.

I found the well that was fracked in 8/16 that was probably the reason for BR taking these wells off-line:

• 31310, 1,179, Hess, AN-Brenna-LW-153-94-3130H-1, Antelope, Sanish pool (Three Forks), t9/16; cum 176K 6/17; a "small" frack, only 3.1 million gallons of water; 13% sand by weight;

The graphic:

Again, there are many, many problems with this:

• distance between horizontals;
• different formations;
• closer horizontals, targeting same formations, jump in production much less than #25961

I still feel uncomfortable with this one but another good example of the peculiarities of the Bakken.