Parent / Child Wells -- Random Note -- October 11, 2019

Well, look at this.

Regular readers of the blog know that I am inappropriately excited about the "halo" effect -- that jump in production seen in Bakken wells when they are brought back on line after being off line for a few weeks or a few months while neighboring wells are fracked. In some cases (rarely) the "parent" well is off-line for less than a month.

I tag posts discussing this phenomenon as "halo" or "jump in production." I noted the phenomenon almost a decade ago but had not seen validation from a credible source.

[The very first post that was tagged with the halo effect was dated August 19, 2010. Link here: http://themilliondollarway.blogspot.com/2010/08/another-first-for-north-dakota_19.html.]

I did receive a phone call from an analyst at the largest fracking company in the Bakken at that time about six years ago asking me about my observations. The analyst said his company was referring to these as "parent/child" wells. I did not post the specifics of that phone call at that time assuming that some of the information I had been told was proprietary.

[I was in Belmont, MA, when I received the phone call. I was last in Belmont, MA, in 2013: that's why I know that the phone call was at least six years ago.]

I continue to look for validation from credible sources. About a month ago, maybe two or three months ago, I started getting hints of validation from Whiting. I think I have posted some of that, but I can't recall for sure.

Break, break.

It's my observation that the parent / child interaction in the Bakken is "positive." Either there is no effect, a subtle effect, or a huge positive effect, but I have not seen any suggestion that the parent / child interaction is "bad news" in the Bakken.

On the other hand, however, there have been numerous stories in the popular press that this is not the case in other shale plays. There are concerns, particularly in the Permian, that new wells (or "children" wells) are having an adverse effect on older wells ("parent" wells).

Break, break.

Tonight, in the process of looking for something else, I ran across this slide in a recent Whiting presentation.

The link: https://event.webcasts.com/viewer/event.jsp?ei=1260399&tp_key=d761d52d8c.

Slide #9.

Screenshot:

Note: "Parent / child well activity [in the Bakken] is positive vs experience in other shale plays."

By the way, that one slide above has many, many other interesting data points. 

Random Update Of Two WPX Wells In Spotted Horn Oil Field -- October 3, 2019

Two older wells on same pad, one goes north, one goes south, in Spotted Horn oil field.

The well going south:

• 18948, 1,912, WPX, Kyw 27-34H, Spotted Horn, t101/10; cum 352K 8/19;

Recent production:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	8-2019	31	9763	9909	4510	11296	0	9350
BAKKEN	7-2019	29	6573	6112	3497	7606	0	6450
BAKKEN	6-2019	0	0	0	0	0	0	0
BAKKEN	5-2019	0	0	0	0	0	0	0
BAKKEN	4-2019	0	0	0	0	0	0	0
BAKKEN	3-2019	0	0	0	0	0	0	0
BAKKEN	2-2019	0	0	0	0	0	0	0
BAKKEN	1-2019	1	58	0	0	67	0	61
BAKKEN	12-2018	0	0	110	0	0	0	0
BAKKEN	11-2018	3	84	86	5	96	0	36
BAKKEN	10-2018	31	739	717	167	855	0	163
BAKKEN	9-2018	30	1023	1031	131	1184	0	409
BAKKEN	8-2018	31	1184	1225	156	1370	0	489

The well going north did not show any jump in production initially, but is now off line again, suggesting .... we may have to come back to this one, but the graphic clearly suggests why the one that went south had such a larger jump in production, compared to this one:

• 22629, 180, WPX, Sweet Grass Woman 22-15HB, Spotted Horn, t7/12; um 401K 8/19;

Flashback: Back To 2013 -- Spacing And "Bench Communication" In The Bakken -- September 28, 2019

Goldman Sachs on 320-acre and 160-acre spacing in the Bakken. September 25, 2013. Link here.

Array Fracking to Enable Bench Communication. September 17, 2013. Link here.

These are great articles, albeit from a different time when oil was $100/bbl. I am surprised these are still available, not behind a paywall. One may want to archive them before they are lost. Both articles are now archived.

For more, click on "KOG's Polar Pilot Project."

Going Back Home, Wilco Johnson, Roger Daltrey

Bakken Phenomena: Inter-Formation-Uplift; New Lease On Life -- September 23, 2019

I've quit posting parent-child uplift data for the most part; only when it interests me. It's so common in the Bakken, it's no longer news.

However, it should be noted, that for a number of reasons (which should be obvious) the parent-child uplift data generally involves parent wells and daughter/child wells targeting the same formation. In the Bakken, this is generally the middle Bakken.

Without comment or hypothesizing or explanation or anything else, there is another Bakken phenomenon: parent-child uplift involving different formations.

First example that I have specifically pointed out is at this post, a middle Bakken parent well and a Three Forks second bench well.

There have been numerous examples of similar results involving the middle Bakken and the Three Forks, first bench, and I guess I have pointed them out, but not as clearly as I'm pointing it out now. I need a new tag for this phenomenon, perhaps, "parent-child-inter-formation-uplift."

There's also another phenomenon for which I need a tag. Often, an older well is starting to show its age; the decline rate has leveled off and one gets the feeling that the well is beginning to "peter out." Then a neighboring well(s) is (are) completed, and the parent well gets an "extension." There is no significant jump in production (if there is a jump, it is subtle and folks would suggest something else is going on) but the decline rate is extended. The result: the EUR increases. Tag for now, "parent-well-new-lease-on-life" is way too long but I need a placeholder. Maybe "EUR_extended" or "EUR_EXT."

I suppose I could call all these Bakken phenomena, the Bakken gods smile on Harold Hamm. LOL. They may not be enough to move the needle for the operators, but mom-and-pop mineral owners love them and I'm sure the Slawson brothers get a chuckle out of them (or out of my naiveté ).

CLR Has Completed Angus Federal 6-16H2; Older Well Back On Status; Small Jump In Production

A neighboring well has just been completed and is producing:

• 33965, SI/NC, CLR, Angus Federal 6-16H2, Elm Creek, 26,729 feet; producing as of 5/19; three Forks, second bench; t5/19; cum 568K 1/24;
  

The well:

• 20804, 329, CLR, Angus 1-9H, 30 stages; 2.7 million lbs, t2/13; cum 310K 7/19; offline as of 12/18; still offline 4/19; back on line as of 5/19; a middle Bakken well; cum 401K 1/24;
  

Recent production; small jump in production:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	7-2019	31	4482	4166	3802	6872	3605	2877
BAKKEN	6-2019	27	3536	3840	3573	5553	2115	3149
BAKKEN	5-2019	9	1315	806	640	729	62	628
BAKKEN	4-2019	0	0	0	0	0	0	0
BAKKEN	3-2019	0	0	0	0	0	0	0
BAKKEN	2-2019	0	0	0	0	0	0	0
BAKKEN	1-2019	1	0	187	22	0	0	0
BAKKEN	12-2018	25	1625	1687	548	4847	4437	75
BAKKEN	11-2018	30	1952	2054	666	4360	3428	538

151-92-3, Big Bend, Slawson, Pike Federal -- Note Jump In Production In An Old Well -- March 13, 2018

Look at the jump in production in #18970, a middle Bakken horizontal sandwiched between Three Forks horizontal wells.

The graphic:

The wells:

• 25874, 1,505, Slawson, Pike Federal 4-3-2TFH, Big Bend, t9/17; cum 262K 3/20; off line as of 3/20; remains off line 6/20;
  
• 23910, 820, Slawson, Pike Federal 2-3-2H, Big Bend, t9/17; cum 268K 3/20; off line as of 3/20; remains off line 6/20;
  
• 25873, 645, Slawson, Pike Federal 5-3-2TFH, Big Bend, t8/17; cum 253K 8/19; sporadic production in last couple of months, 8/19; t9/17; cum 277K 3/20; off line 4/20; remains off line 6/20;
  
• 31438, 747, Slawson, Pike Federal 3-3-2H, Big Bend, t10/17; cum 239K 3/20; intermittent as of 4/20; 19 days in 6/20;
  

• 31437, 357, Slawson, Pike Federal 6-4-2TFH, Big Bend, t12/17; cum 264K 2/20; huge well; no evidence of dreaded Bakken decline yet, 8/19; off line 3/20; remains off line 6/20;
  
• 18970, 1,106, Slawson, Pike Federal 1-3-2H, Van Hook (scout ticket error?), t9/10; cum 538K 3/20; FracFocus with no evidence of a re-frack; see production data below; wells on either side were fracked just prior to jump in production; but note that neighboring wells were Three Forks wells, and #18970 was a middle Bakken well; off line 4/20; remains off line 6/20;
  
• 25885, 332, Slawson, Pike Federal 7-3-2TFH, Big Bend, t12/17; cum 258K 3/20; offline 4/20; remains off line 6/20;
  

Recent production profile for #18970, FracFocus reveals no re-frack; no sundry form to explain jump in production:

Pool	Date	Days	BBLS Oil	Runs	BBLS Water	MCF Prod	MCF Sold	Vent/Flare
BAKKEN	9-2018	20	4623	4387	6173	3668	2947	125
BAKKEN	8-2018	31	9268	9301	6690	8105	6598	348
BAKKEN	7-2018	28	8478	8419	7957	6691	5425	207
BAKKEN	6-2018	30	10584	10228	8398	7857	6213	353
BAKKEN	5-2018	31	12094	12182	14969	8566	2483	4622
BAKKEN	4-2018	30	15262	15262	20444	11108	5272	4046
BAKKEN	3-2018	26	16133	16460	21365	12318	6827	3637
BAKKEN	2-2018	21	11725	11356	17317	9772	8211	194
BAKKEN	1-2018	28	12342	12996	17955	8437	0	6994
BAKKEN	12-2017	2	1327	0	31693	1604	0	1452
BAKKEN	11-2017	0	0	0	0	0	0	0
BAKKEN	10-2017	0	0	0	0	0	0	0