Final Report - National Energy Technology Laboratory - U.S. ...

Production and Drilling
Characteristics:
Economic
Characteristics:
a. Important
fields/reservoirs
b.Cumulative production
many fields produce from Cambrian through Permian rocks: Washita Creek
field in Hemphill County, Texas, at the west end of the basin (from the
Cambro-Ordovician at a depth of 24,450 ft; single well reserves as high as 24
BCFG);
Knox field near the southeastern flank of the basin (from Bromide (Simpson)
production at 15,310 ft depth; single well reserves as high as 6.2 BCFG) (Al-
Shaieb et al., 1997);
Berlin field in Beckham County, Oklahoma (from the Pennsylvanian Atokan
formation; estimated ultimate recovery of 362 BCFG at 15,000 ft depth
(Lyday, 1990))
a. High inert gas content gases are generally high in Btu content and low in total inert gases
b.Recovery recoveries vary depending on permeability, porosity and depth
c.Pipeline infrastructure very good
d.Overmaturity overmature in the deepest parts of the basin
e.Basin maturity most of the basin is mature (Ro values for the Woodford exceed 0.7%)
(Hester et al., 1992)
f.Sediment consolidation most rocks are well indurated
g. Porosity/completion
problems
Shales, tightly cemented sands & other tight (low permeability rocks) have
the potential to produce where naturally fractured (many deep Anadarko
basin fields have permeabilities of less than 0.1 md). Water sensitive clays
also cause problems.
h.Permeability ranges from less than 0.08 up to 6,000 md
i.Porosity highly variable