Playbooks Supplements

Scoop-Stack Playbook 2017

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SCOOP/STACK: TECHNOLOGY 24 | September 2017 | T here is an old adage in the patch: The best place to find oil is in an oil field. Oklahoma has long been considered an oil-rich state. Most annual lists of oil-producing states will find Oklahoma in the top 20%, usually only outpaced by places like Texas, Alaska and California. Advances in technol- ogy have allowed operators to unlock more of the state's vast unconventional resources. Oil companies began drilling into the Woodford Shale as early as the 1930s, but it was only in the past decade or so that horizontal wells have been drilled to crack the region's hidden hydrocarbon potential. The Woodford Shale covers virtually the entire state of Oklahoma and is far more complex than other Devonian black shales found in North Amer- ica. Complex, alternating bands of amorphous sil- ica and silica-rich shale of varied thicknesses have been historically tough on bits, adversely impacting horizontal drilling. However, two new plays in the trend have emerged over the past few years—the Scoop and Stack—that have been a pair for the record books. Well results over the past year have been sen- sational. Devon Energy's Pony Express 27-1H, a July 2016 Stack record-setter in the overpressured oil window of southwest Kingfisher County was drilled with a 5,000-ft lateral and achieved a 30-day average rate of 2,100 boe/d, consisting of 1,500 bbl/d or 70% of the production mix. Oil produc- tivity from the Pony Express was the highest of any well drilled in the Meramac section of the play at the time on a per-lateral-foot basis. In December 2016 Continental Resources' Angus Trust 1-4-33XH, drilled in Blaine County, set a company IP record with flows of 4,642 boe (45% oil) in a 24-hr test, comprising 2,088 bbl of oil and 15.3 MMcf of natural gas. Then there was Newfield's Burgess well in March of this year, also in Kingfisher County, achieving a 24-hr flow rate of 2,931 boe/d, of which 69% was oil, and a 20-day average rate of 2,492 boe/d, of which 70% was oil. Smaller players got in on the action as well. Ward Petroleum's Lynda 26-23-1XH well, drilled in to the Mississippian reservoir of the Scoop, tested at an initial rate of almost 16 MMcf/d of gas, 860 bbl/d of oil and 2,150 bbl/d of load water. Each of these successes owes a tip of the hat to improved and emerging technologies that have made it possible to accurately forecast, land and fracture these wells. Improvements in diversion, bits, and the gathering and processing of gen- eral formation information have all had a hand in some of the most impressive IP results in the Lower 48. As with any play in its earliest days, players are still working through which recipes of soft- ware, hardware and other measurables make for the best economics and results, but industry success to date has prompted many to take a good look at investing in the area. The attrac- tion is so acute that at least one producer—Okla- homa City-based Devon Energy—is preparing to sell off $1 billion of profitable operations in the Texas Barnett Shale to lever up in the Stack play without incurring debt, or as one Devon executive put it recently, selling good wells to drill great ones. Technology is pushing Oklahoma's Scoop/Stack play further into the black. Sooner Boomer By Blake Wright Contributing Editor

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