Shale gas recoveries

10/24/2011
When does the extrapolation of a shale gas well's production decline curve transition from a hyperbolic to an exponential decline flow regime? This was one of the issues examined in assessing ultimate recoveries from shale gas wells in Ryder Scott Co. LP's September-November 2011 quarterly newsletter. Production decline curves use empirical equations developed before 1945 by J.J. Arps and others. These equations have found wide use in the industry because they are simple and fast for estimating future recovery from a well or field. Decline curves The decline curve equations have problems when applied to tight gas reservoirs such as shales. One problem explained in the newsletter is that A...
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