Hunton and Sycamore reservoirs in Golden Trend field, Garvin County, Oklahoma
During the 1980s, significant reserves have been developed from Hunton and Sycamore reservoirs subcropping beneath the basal Desmoinesian unconformity, on the east flank of the Anadarko basin in T2, 3N, R2, 3W. Earlier oil production from the giant Golden Trend field has been largely from several overlapping Pennsylvanian stratigraphic traps, with only a minor contribution from pre-Pennsylvanian reservoirs within the study area. Approximately 200 Hunton/Sycamore producers have been drilled since 1982 in a program that continues to be active and competitive, despite the general industry downturn. The economic success of this play is the result of seven major factors: (1) establishment of a large productive area with a nearly 100% success rate, (2) knowledge that the Hunton is primarily a fractured reservoir and does not require matrix porosity in the Bois D'Arc and Chimneyhill formations, as assumed by earlier operators, (3) recognition that the Haragan and Henryhouse Formations of the Hunton Group are productive, despite unimpressive log characteristics, (4) discovery that not only the local clean limestones, but also the widespread shaly, dolomitic siltstones of the Sycamore are productive, added an important second reservoir, (5) application of large-volume, high-rate, water fracs without proppant that lowered costs without sacrificing productivity, (6) penetration of Pennsylvanian Hart and Gibson sandstones added important behind-pipe reserves, and (7) high initial flow rates provided rates of return that compensate for the relatively high finding costs per barrel.
- Research Organization:
- Anadarko Petroleum Corp., Oklahoma City, OK
- OSTI ID:
- 5907046
- Report Number(s):
- CONF-870916-
- Journal Information:
- AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States), Vol. 71:8; Conference: American Association of Petroleum Geologists Mid-Continent Section meeting, Tulsa, OK, USA, 27 Sep 1987
- Country of Publication:
- United States
- Language:
- English
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