Random Look At Oasis Activity Just North Of Williston; Lower Tyler Formation 100 Feet Thick

There's a lot of activity just north of Williston. Oasis crews must be stumbling over each other just to get to their rigs.

This is less than one mile north of the current northern edge of Williston:

Those are three Oasis rigs, one each on three different pads. The pad to the west is a 3-well pad; the middle pad is a three-well pad, and the pad to the east is a two-well pad.

Of these, one well has been completed; a well on the far west pad:

• 22414, 2,448, Oasis, Tufto 13-24H, Cow Creek, t5/13; cum 77K 1/14; 

This is a middle Bakken well, but note this from the well report:

The Tyler formation was located at 7,585 feet MD... the upper Tyler was ... the second portion of the Tyler consisted of black carbonaceous, dense shale starting at 7,700 feet MD and lasted for roughly 100 feet to 7,800 feet MD as it transitioned into a gray limey mudstone. Gas in this area rose to 84 units and oil shows revealed a dull yellow gold streaming cut and pale yellow fluorescence. Gamma averaged 133 API with a max of 453 API. NOTE: due to the oil cuts and quality of the sahle this area may warrant further study. [Caps and italics were those of the geologist's.]

Kind of exciting, huh?

But there's more.

Look at #14723. This well is a re-entry Madison well. This well, originally named the Zinke & Trumbo Kermit #1-13H, was a Madison well first drilled in 1997 and then re-entered and a new lateral drilled in the 2003 time frame. According to the well file at that time of re-entry:

"The Zinke & Trumbo Kermit #1-13H is an effort to further develop the Nesson reservoir at Cow Creek Field. Plan called for a long lateral leg to be drilled into an undrilled quarter section that is interpreted to contain a thicker, more porous reservoir in a structurally advantageous position. The plan was to re-enter the exisiting Kermit #1-13H horizontal well bore and sidetrack it up dip to the north.

The original well, drilled as a "grass root" horizontal well, was drilled by Chesapeake Energy in 1997 and has produced approximately 74,000 bbls of oil from the Mississippian Nesson porosity. It is still producing approximately 25 bopd (before re-entry)."

The well now, to date:

• 14723, 279, Oasis, Kermit 1-13H, Madison (re-entry), 165K 1/14; producing around 700 bbls per month. It will be interesting to see the production from this well after seven Bakken/Three Forks wells are fracked in the same section. It is possible the well will be taken off-line when the Bakken wells are being fracked.

So, this section:

• Madison proved
• Tyler needs to be re-evaluated
• middle Bakken and Three Forks being targeted now
• middle Bakken proven with high IP on first middle Bakken well in this section

I didn't look at the Lodgepole, but Oasis is known to be interested in evaluating the Lodgepole north of Williston (at least it has been). 

Disclaimer: I have no formal training in any of this. There may be typographical errors and there may be interpretive errors. This is for my own use but folks are free to read it at their leisure if they stumble upon it. Do not make any life-changing decisions based on anything you read at this blog or think you have read at this blog.