A Bit More Information on the Lodgepole Wells North of Williston -- The Bakken, North Dakota, USA

Update

March 3, 2012: another Lodgepole well north of Williston?

• 21019, 1,339, Oasis, Melville 5601 12-18H, Tyrone field; someone suggested that an Oasis well in this section (though not sure) was a Lodgepole well. According to the file report said it was a middle Bakken horizontal well. t12/11; cum 52K 6/12;
  

February 27, 2012: was entering the Lodgepole a mistake or on purpose? Or were they even above the Lodgepole?

Original Post

Back on February 25, 2011, I wrote this regarding the March, 2011, dockets:

Slawson is going to try something we don't see often: going into a producing horizontal well, but opening the vertical portion to another formation

* Case 14386: Slawson wants to go back into Ambush 1-31-30H and open a portion of the vertical section of the well to the Lodgepole Formation in Williams County

So, any update?

There are currently three other wells north of Williston that are targeting the Lodgepole Formation, not including this one.

This is the status of Ambush 1-31-30H (as of data available December 23, 2011):

• 19707, 288/IA, Slawson, Ambush 1-31-30H, Bakken, Wildcat, s1/11; cumulative oil 55 bbls (produced in 12/11)

It turns out the Ambush well is a long lateral, sited in section 31-T156N-R101W (long lateral sections 31 - 30), in the Tyrone oil field.

This is the same oil field that Oasis has recently completed a Lodgepole well; results not yet reported, but the one Lodgepole well north of Williston that I was particularly interested in.

So, did Slawson end up opening the vertical into the Lodgepole formation? No, Slawson cased it to isolate the Bakken from the Lodgepole. According to the sundry notice dated February 17, 2011:

... These packers should isolate the targeted Middle Bakken from the Lodgepole at least thru fracing the target zone. After fracing it would still be possible to perf and squeeze above the Upper Bakken Shale and even inside the 7" casing below liner hanger with Pack off to further isolate the Lodgepole if required by NDIC. The Lodgepole is very tight in this area is reportedly not productive. (sic) Slawson will also be applying for a vertical Bakken Pool extension for this well in the upcoming hearings.

So, the Lodgepole is very tight and reportedly not productive in this field. It will be interesting to see how the Oasis Lodgepole in this field, the Tyrone oil field, turns out.

I am getting beyond my understanding of what they are doing, so I will leave it here and follow-up later. If I've misinterpreted something, I apologize. Others may have more insight.

Stumblin' In, Suzi Quatro and Chris Norman