Print this pageApplication of a High-Frequency Sequence Stratigraphic
Framework
in the 2nd Frontier, Green River Basin, Wyoming
A high-frequency sequence stratigraphic
model applied over a 700 mi2 area in the Cretaceous, 2nd Frontier
(Kf2) in Green River Basin, Wyoming, resulted in a 41% increase in rate of
return from the year 2002 to 2003. The area includes the LaBarge
Platform on the north extending up to Chimney Buttes Field, and continuous
south across the southern end of the Moxa Arch. To
date over 2.8 TCF of gas have been produced from the Kf2 in this region.
Approximately 2,000 wells containing raster and/or digital well-log data
were used. Published core descriptions and in-house described cores help
constrain the correlations and allow for calibration of facies
to log characteristics. The gross stratigraphic
framework encompasses two large-scale base-level rise to fall cycles. Smaller
scale base-level cycles help explain and predict reservoir distribution across
the area. Well-log cross sections based on this stratigraphic
framework
in conjunction with sand and pay maps illustrate stacking patterns,
along-strike facies variations, and stratigraphic changes across the depositional profile, as
well as production trends.