The average estimated ultimate recovery (EUR) of wells drilled during 2008-13 in the Eagle Ford shale in South Texas was 168,000 bbl/well, according to the US Energy Information Administration . But the estimates vary greatly among regions within the play and even well to well, especially wells of different ages. The median EUR across all 32 Eagle Ford counties over the study period was 103,000 bbl/well. The Eagle Ford analysis, by Dana Van Wagener, appears as part of EIA’s Annual Energy Outlook 2014 in a report illustrating assumptions for shale and tight oil plays in forecasts of total US production of crude oil. For each tight or shale well with initial production in 2008 or later and for which at least 4 months of production data are available, the analysis fits monthly production to a decline curve that begins hyperbolic but shifts to exponential after the decline rate reaches […]