EIA adds Anadarko Basin to its Drilling Productivity Report

By Patrick C. Miller | August 21, 2017

The Energy Information Administration (EIA) has made two significant changes to its monthly Drilling Productivity Report (DPR).

To provide more complete coverage of U.S. crude and natural gas production, EIA expanded the report to include the Anadarko region, which covers most of the production from the Anadarko Basin in 24 Oklahoma counties and five counties in Texas. In addition, two other regions—the Marcellus and the Utica—have been combined into one Appalachia region.

According to EIA, the Anadarko Basin has a long history of hydrocarbon production. In recent years, it has seen an increase in activity mainly from two areas commonly known as the STACK (Sooner Trend Anadarko Canadian and Kingfisher) and the SCOOP (South Central Oklahoma Oil Province) plays.

EIA is combining the Marcellus and Utica regions into a single Appalachia region. The formations of the Appalachian Basin that make up the Marcellus and Utica plays span New York, Ohio, Pennsylvania and West Virginia. They overlap in some areas.

As drilling activity and production in the Appalachia region have increased in recent years, the overlapping formations make it difficult to attribute production to the proper formation. Combining the two areas into the Appalachia region better reflects the underlying geology of these formations.

Before including the Anadarko, the DPR reported on 73 percent of all active onshore rigs in the U.S.—680 of the 928 onshore rigs nationwide as of July 2017. Including the 129 active rigs in the Anadarko region will increase the report’s coverage to 87 percent of all active U.S. onshore rigs.

The Anadarko region accounts for approximately 450,000 barrels per day of oil production, 5.7 billion cubic feet per day of natural gas production, 13 percent of new wells drilled and 13 percent of drilled but uncompleted wells as of July 2017.

Production in the Anadarko region mainly comes from shale and limestone layers of the Meramec, Osage and Woodford formations. These formations are deep, but offer thick layers of shales—thicker than those in the Bakken formation and similar to those in the Eagle Ford formation.

Other producing formations in the region include the Granite Wash, Cleveland, Tonkawa and Marmaton, which are mainly located in Texas. However, EIA said the most prolific counties to date are in Oklahoma.