Hambert-Aristocrat Field
Hambert-Aristocrat Field, Colorado produces oil and gas from the Cretaceous Terry Sandstone (alternately referred to as Sussex Sandstone in this area) along the east side of the Denver Basin (Fig. 1) at depths of about 4400-4700ft. (McKinnie, 1993). A development history of Hambert-Aristocrat Field is provided by VanKirk (1996). The immediate Hambert-Aristocrat area encompasses 54 leases with about 100 completed wells. Production was initiated in 1972 with 320-acre spacing for gas and 40-acre spacing for oil. Cumulative production through August 1993 has been 24.8BSCF of gas and 1MM STBO. OGIP is estimated to be approximately 60BSCF and OOIP is estimated to be 7-17MMSTBO. Wells are typically drilled with fresh water mud, cased through the Terry interval, then completed by perforating (generally 4 shots/foot) and hydraulic fracturing. Initial reservoir pressure is estimated to have been 1600-1750psi. An average oil gravity of 51O API has been calculated. Because of its low permeability, several sections in the field area are classified as tight gas by FERC.
