Image courtesy of Devon Energy.

Devon Energy brought a record-setting oil well in the over-pressured oil window of the STACK play online earlier this week.

The Oklahoma-based company said Monday that it recently brought the Pony Express 27-1H oil well in the over-pressured oil window in southwest Kingfisher County online.

The Pony Express 27-1H was drilled with a 5,000-foot lateral and achieved a 30-day average rate of 2,100 barrels of oil equivalent per day, consisting of 1,500 barrels of oil per day, or 70 percent of the production mix.

Devon said that oil productivity from the Pony Express is the “highest of any Meramec well drilled to date in the play on a per lateral foot basis.”

The Sooner Trend Anadarko Basin Canadian and Kingfisher Counties play, commonly known as STACK, is located in north-central Oklahoma.

Devon also conducted its Alma spacing pilot, testing five wells per section across a single interval in the upper Meramec, delivering 30-day production rates averaging 1,400 oil-equivalent barrels per day per well.

Sixty percent of that production was light oil.

Devon said that early flow-back results from the Alma pilot indicates “minimal interference between wells, suggesting potential for tighter spacing in the over-pressured oil window.”

The Alma wells were drilled with 5,000-foot laterals and were conservatively brought online with a 12/64-inch choke and gradually increased to a 20/64-inch choke.

With the Alma test, Devon has two successful spacing pilots in the core of the Meramec oil window.

The company said that production from the two-well Born Free pilot “continues to perform exceptionally well,” achieving a 90-day average rate of 1,500 boe per day per well with 60 percent oil.

The next pilot Devon expects results from is the Pump House test in southwest Kingfisher County.

The Pump House is testing seven wells per section in a single interval in the Upper Meramec with initial flow rates expected in the third quarter of 2016.

Devon is participating in several additional spacing pilots during the remainder of 2016 to determine the optimal approach for developing stacked-pay intervals in the Meramec.

The spacing pilots are focused in the over-pressured oil window and are testing up to eight wells per section in a single Meramec interval and are also evaluating the joint development of multiple stacked-pay intervals through staggered well pilots.

Devon said that results from the Meramec spacing pilots will help the firm “optimize” its master development plan in the overpressured oil window.

Devon expects to progress into full-field development in 2017.

“The Alma spacing pilot and record-setting Pony Express oil well are examples of the excellent results we are achieving in the Meramec formation, which has quickly evolved into the best emerging development play in North America,” Devon chief operating officer Tony Vaughn said.


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