The most recent estimates from the Energy Information Administration’s (EIA) Petroleum Supply Monthly from Jan. 29 put Oklahoma’s crude oil production at about 100,000 barrels per day higher than previous data indicated, the agency said Feb. 12.

The revised data impact regional and national total production series. The previous estimate was calculated using state-reported data and previous EIA methodology, the agency added.

The recently expanded EIA-914 survey collects oil production data from the largest oil producers in 15 states, including Oklahoma, the U.S. Gulf of Mexico and the remaining states as a group.

Estimates based on the expanded EIA-914 survey, which had previously been implemented for other states, replace the earlier methodology depending on state-collected data. For Oklahoma, the significant discrepancy between production estimates using earlier methodologies and those based on the new 914 survey, which directly samples about 75% of the state's crude oil production volumes, led the EIA to undertake an in-depth evaluation.

The agency conferred with a number of large operators with significant production growth to confirm their reported production for 2014 and 2015. After review of these data and discussions with other operators, purchasers, Oklahoma state officials and commercial data vendors, the EIA determined that its expanded EIA-914 survey provided a better estimate of monthly Oklahoma production.