Devon Energy Corp. is claiming the highest output of any well to date within one of Oklahoma’s stacked reservoirs, a Lower Meramec well that achieved a peak 24-hour rate of 5,100 boe/d.

According to the Oklahoma City-based independent, the Faith Marie 1-H is directly adjacent to the company’s Coyote development project in Blaine County, OK, within the so-called STACK, the Sooner Trend of the Anadarko Basin, mostly in Canadian and Kingfisher counties.

The onshore operator’s development is concentrated today most in Oklahoma’s myriad intervals and within the Permian Basin.

“The projected 30-day rate for this 9,000-foot lateral well is 4,600 boe/d (65% oil),” management said. “Oil productivity from the Faith Marie is the highest of any STACK well to date targeting the Lower Meramec interval.”

Devon credited an enhanced completion design, which also reduced well costs to an estimated $9 million.

“As we shift to full-field development in the STACK, we expect to achieve a step-change improvement in capital efficiency and returns,” said COO Tony Vaughn. “The advancement of Devon’s multi-zone development activity in the STACK, coupled with the deployment of our cutting-edge completion design, is expected to improve capital efficiencies by up to 20% while continuing to deliver best-in-class well productivity in the play.”

The improved well results versus legacy wells was credited to a higher viscosity slickwater fluid system and an increased fracture stage length. Learnings from the enhanced completion design are to be deployed to future full-field development activity.

Between October and December, Devon expects to bring online about 25 wells in the STACK play using the improved completions. The new well activity primarily would be used in the over-pressured oil window, which could increase net production in the STACK to more than 120,000 boe/d by year’s end, management said.

Devon in September also began drilling its seven-well Coyote development project adjacent to the Faith Marie well, which is  targeting the same landing zone in the Lower Meramec.

“The drilling program at Coyote has reached target depth on three wells, with drilling times improving by approximately 15% compared to the results of the offsetting Faith Marie well,” management said. Three rigs are dedicated to the Coyote project, with initial production (IP) rates expected in early 2018.

Drilling also continues at Devon’s Showboat project in Kingfisher County, the company’s first multi-zone development in the STACK. Showboat consists of 24 wells across two drilling units, co-developing four intervals. Five rigs now are running at Showboat, with initial drilling set to be completed by year’s end. Showboat is offset by the record-setting Privott well, landed in the Upper Meramec, which achieved a peak rate of 6,000 boe/d. Showboat IP rates are expected in 2Q2018.