Saturday, March 5, 2016

Looking For Halo Effect In A Tyrone Oil Field Drilling Unit -- March 5, 2016

A reader asked if there was any evidence of a halo effect among these wells. It was a great question. The original well in this drilling unit was drilled in 2011. Then a singleton followed in 2013, running in the opposite direction. Finally, a 3-well pad was completed in 2015. This was a perfect opportunity to see if there was any evidence of a halo effect. If there was, it was minimal. Things are complicated with the huge slump in prices; wells are being taken off line and/or choked way back. This makes "understanding" the Bakken very challenging.  (I'm done with this page; if the reader has additional questions, please feel free to ask. In a long note like this, done quickly, there will be typographical and factual errors, so if something looks wrong, let me know and I will double-check).

I track the Tyrone oil field here. It has been updated.

Anyway, a look at these five wells. First the graphic and then the production profiles below the graphic:




#19048, drilled back in 2011, in the southeast corner of the drilling unit under discussion:
  • 19048, 705, HRC, Borrud 156-101-11D-2-1H, Tyrone, t8/11; cum 170K 1/16;
  • the well was taken off line in early 2014, and again in early 2015; the halo effect if anything was marginal; production for selected period of time:

BAKKEN10-2015312579259570191568132922
BAKKEN9-2015303267318769972106180888
BAKKEN8-2015312080194667781332788327
BAKKEN7-20151167117748060815706102
BAKKEN6-201514535163700
BAKKEN5-201565904244200
BAKKEN4-2015211001400
BAKKEN3-20151320652120672715461244211
BAKKEN2-2015281878207020191589134746
BAKKEN1-2015311971184125282041174678
BAKKEN12-20143125022861244525652082266
BAKKEN11-201430258423132201247322630
BAKKEN10-201431276627332573246522480
BAKKEN9-20142925432571229320111216592
BAKKEN8-20143129252940256522225661439
BAKKEN7-20143131583225292514851043225
BAKKEN6-20143030733102363025691382221
BAKKEN5-20141398067219504664371
BAKKEN4-20140000000
BAKKEN3-2014168151144112032313675
BAKKEN2-2014282332214533201526125773
BAKKEN1-2014241520148032261250100181
BAKKEN12-20133126573046226626021968417


Then, #25562, drilled back in 2013:
  • 25562, 1,208, HRC, Borrud 156-101-2A-11-2H, Tyrone, t8/13; cum 187K 1/16;
  • the well was taken off-line in early 2015, but I don't see much of any halo effect; selected monthly production:
PoolDateDaysBBLS OilRunsBBLS WaterMCF ProdMCF SoldVent/Flare
BAKKEN1-20163135363534410231932205771
BAKKEN12-20153134283514439830462685144
BAKKEN11-20153043684484587036403319111
BAKKEN10-201531445743877449354933320
BAKKEN9-20152938363631617032022783216
BAKKEN8-20151715261662285115833661098
BAKKEN7-20153040834100639639255903125
BAKKEN6-20153035123393734823761891275
BAKKEN5-20153137823739622730048391948
BAKKEN4-20151499410491719961415448
BAKKEN3-201571292143814925490500
BAKKEN2-201522264430804373186817131
BAKKEN1-20153042713927620920391703126
BAKKEN12-20143141704362597020171643157
BAKKEN11-201421317832234437484646990
BAKKEN10-20143061976217857571856854121
BAKKEN9-2014307223713391687822757339
BAKKEN8-20142869976942897580207352472

Finally, a 3-well pad drilled back in early 2015:
  • 29238, 1,209, HRC, Borrud 156-101-2B-11-3H, Tyrone, t4/14; cum 82K 1/16;
  • 29239, 1,803, HRC, Borrud 156-101-2B-11-4H, Tyrone, t3/15; cum 107K 1/16;
  • 29240, 1,827, HRC, Borrud 156-101-2B-11-5H, Tyrone, t4/15; cum 102K 1/16;
Selected production profile for #29238, fairly typical of all three wells. Note the number of days on line and the amount of production each month. I generally see a drop-off in the second-fourth months of production (I assume there is work being done on the well to get it in tip-top shape), and then a typical Bakken decline. It's hard to say if the production in 1/16 is due to Bakken decline or due to operator cutting back due to low oil prices, but note that in 12/15, the well was off-line 7 days:

PoolDateDaysBBLS OilRunsBBLS WaterMCF ProdMCF SoldVent/Flare
BAKKEN1-201631709270688130596344161330
BAKKEN12-20152462856407762851884811209
BAKKEN11-2015306992738096805837560819
BAKKEN10-2015311003810010169147837759525
BAKKEN9-20153010761102791749986018224167
BAKKEN8-2015279033909714344789146233079
BAKKEN7-20151564126331965540983559434
BAKKEN6-201515336833246692227521700
BAKKEN5-2015187283751213007615041401884
BAKKEN4-2015261476414393251841203976634194
BAKKEN3-20150000000

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