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Line 219: + + − + − − [[File:M97Ch4FG15.jpg|400px|thumb|FIGURE 15. Table of the top 15 gas fields of the world showing the relationship of the most recent reserve estimates for the Marcellus Shale gas play. Modified from Sandrea (2006). Reserve estimates from Engelder (2009). TX = Texas; OK = Oklahoma; KS = Kansas.]]
Appalachian Basin Marcellus gas play (view source)
Revision as of 13:34, 13 October 2015
, 13:34, 13 October 2015→Reserve potential
==Reserve potential==
==Reserve potential==
[[File:M97Ch4FG15.jpg|400px|thumb|{{figure number|15}}Table of the top 15 gas fields of the world showing the relationship of the most recent reserve estimates for the Marcellus Shale gas play. Modified from Sandrea (2006). Reserve estimates from Engelder (2009). TX = Texas; OK = Oklahoma; KS = Kansas.]]
Enormous volumes of gas are present in Devonian black shales of the Appalachian Basin. Early studies of the entire play estimated a GIP of 2657 tcf for all shale intervals (Zielinski and McIver, 1982). Reserve estimates specifically for the Marcellus Shale play were historically lower because of the concept that the Marcellus Shale was thinner and less fractured than productive intervals in the Big Sandy field. Recent estimates for the recoverable reserve potential for the modern Marcellus Shale play fall in a broad range of 2.1 to 867 tcf with the currently most accepted estimates being in the range of 220 to 489 tcf (Engelder, 2009). With recent reserve estimates of this scope, Engelder and Lash (2008) provided early recognition of the world-class potential of this resource.
Enormous volumes of gas are present in Devonian black shales of the Appalachian Basin. Early studies of the entire play estimated a GIP of 2657 tcf for all shale intervals (Zielinski and McIver, 1982). Reserve estimates specifically for the Marcellus Shale play were historically lower because of the concept that the Marcellus Shale was thinner and less fractured than productive intervals in the Big Sandy field. Recent estimates for the recoverable reserve potential for the modern Marcellus Shale play fall in a broad range of 2.1 to 867 tcf with the currently most accepted estimates being in the range of 220 to 489 tcf (Engelder, 2009). With recent reserve estimates of this scope, Engelder and Lash (2008) provided early recognition of the world-class potential of this resource.
The Marcellus Shale is a continuous-type gas accumulation and, when fully developed, will consist of a large continuous field or series of fields. Figure 15 is a listing of the top 15 gas fields in the world (Sandrea, 2006). The reserve potential for these top fields ranges from 40 to 1400 tcf. When even the lowest of the recent reserve estimates for the Marcellus are compared with these top worldwide fields, the true potential and scope of the Marcellus Shale are apparent.
The Marcellus Shale is a continuous-type gas accumulation and, when fully developed, will consist of a large continuous field or series of fields. [[:File:M97Ch4FG15.jpg|Figure 15]] is a listing of the top 15 gas fields in the world (Sandrea, 2006). The reserve potential for these top fields ranges from 40 to 1400 tcf. When even the lowest of the recent reserve estimates for the Marcellus are compared with these top worldwide fields, the true potential and scope of the Marcellus Shale are apparent.
==Outstanding geologic issues==
==Outstanding geologic issues==