Understanding
the Wilcox 1 and Wilcox 2 Reservoir Distribution at Jack (It’s Possible That
You Don’t Know Jack!)
Mooney, R. Tom1, Morgan D.
Sullivan1, Larry Zarra2 (1) Chevron Energy Technology
Company,
The 2004 Jack oil discovery encountered
more than 350 feet of net pay oil sands in the Wilcox (Upper Paleocene) in
approximately 7,000 feet of water in the
Sub-salt seismic data are generally poor,
and lack the resolution to effectively characterize the Jack reservoirs.
Consequently, the core analysis, log correlation, and depositional models were
used to characterize the Wilcox 1 & 2 reservoirs at Jack. Both channel and
sheet elements are part of a larger 3D body, a distributary lobe. The distributary
lobe depositional model is the result of previous outcrop research and
subsurface analogs. Using the interpreted elements and previously derived
aspect ratios (width to thickness ratios) we were able to provide dimensions
and reservoir distributions for each element, as well as for the larger
distributary lobes.
In 2006, the Jack 2 well was successfully
tested and sustained a flow rate of more than 6,000 barrels of crude oil per
day.
AAPG Search and Discover Article #90063©2007 AAPG Annual Convention, Long Beach, California