Explain To Me, Again, The Bakken Decline -- March 8, 2016

I track the four Zavanna Simmental wells here; these are east of Williston. Note the jump in production between December, 2015, and January, 2016, both 31-day months of production.

This is one of them, updated:

• 28594, 1,676, Zavanna, Simmental 2-11 4TFH, Long Creek, 50 stages, 5.8 million lbs, t5/15; cum 127K 1/16:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	1-2016	31	22607	21171	32504	53842	51510	1870
BAKKEN	12-2015	31	10600	10521	50977	22086	20295	1329
BAKKEN	11-2015	7	2790	2573	14273	6658	3240	3314
BAKKEN	10-2015	27	19573	19100	39436	37890	27163	10325
BAKKEN	9-2015	20	8862	0	38735	14784	12816	1670
BAKKEN	8-2015	19	13378	12439	16782	21625	19946	1396
BAKKEN	7-2015	31	20661	19351	25230	34227	33461	304
BAKKEN	6-2015	12	16216	15785	17010	22997	17091	5727
BAKKEN	5-2015	12	12283	12042	13745	9825	0	9646

I did not find a sundry form that might have helped explain the surge in production (shown in red). Gas lift was installed / effective as of August 2, 15, some three to four months earlier.

Some data points from the well file:

• spud July 20, 2014 
• TD: 21,835'; October 23, 2014
• total drilling days: 28 days
• 94% within first bench, TF
• gas lift effective 8-2-15
• Three Forks well
• first bench: estimated to 25' thick
• target zone: 6' thick 
• first bench thinned to about 2' beginning at approximately 17,465 feet
• drilled toward the south
• 94% borehole within the first bench
• "The Three Forks formation is a complex petroleum system within the Williston Basin that is sourced by the Lower Bakken Member."
• "There are varying facies within the Three Forks which are commonly referred to as 'benches.' The first bench of hte Three Forks is  the zone of interest for this well. It is comprised of lime mudstone-packstone ..."
• "The overall gas trend of this well suggests the gas was the highest in the areas proximal to or within the ideal taret zone. Background gas averaged 1,800 units, with gas shows ranging from approx 1,500 - 4,500 units. the largest gas reading was near the end of the lateral, just above the target zone, and measured 4,491 units at a measured depth of 21,813 feet.
• This well had significantly lower gas readings in comparison to the other three vertical/curves drilled on the Simmental location. The Middle Bakken has gas shows ranging from 113 - 208 units.

The Zavanna Gust wells in this same section have been taken off line or are on the SI/NC list.