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

Production and Drilling
Characteristics:
Economic
Characteristics:
a. Important
fields/reservoirs
Red Oak field produces from Pennyslvanian sandstones at depths ranging
from 1400 ft to 13,000 ft; Wilburton field produces from Cambro-Ordovician
Arbuckle at depths from 13,000 to 14,500 ft
b. Cumulative production Red Oak field has produced 55 Bcfg from the Hartshorne, 700 Bcfg from the
Red Oak, and 200 Bcfg from the Spiro sandstones as of 1987
a. High inert gas content gases have high btu content and low total inert gas content
b. Recovery recoveries depend upon permeability, porosity and depth
c. Pipeline infrastructure very good
d. Overmaturity probably overmature in the southern and eastern parts of the basin.
Production exists where apparent overmaturity occurs
e. Basin maturity most of the basin is mature to overmature
f. Sediment consolidation most rocks are well indurated
g. Porosity/completion
problems
h. Permeability 0.1-200 md
i. Porosity 5-23%
shales, tightly cemented sands & other tight (low permeable rocks) have
potential to produce where they are naturally fractured (many deep Anadarko
basin ields have permeabilities of less than 0.1 md). Water sensitive clays
also cause problems. Diagenetic permeability barriers are poorly understood.