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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Vernon Field—Waking a Sleeping Giant in
North Louisiana
By
Anadarko Petroleum
Discovered in 1980,Vernon Field, in Jackson Parish, Louisiana, languished as a small tight-gas field for two decades until its potential as a giant was fully realized just five years ago. This field now has more than 250 wells and proven reserves exceeding 1.8 trillion cubic feet. From its discovery until 2000, it was held by at least five different companies, and along each stage of its development, it revealed a bit more of its potential.
Initially, Vernon field was believed to represent a simple
stratigraphic
pinchout of Lower Cotton Valley sandstones against
regional southerly dip. Existing seismic data was sparse and
of poor quality; individual pay intervals were not seismically
resolvable. However, a limited number of
2-D lines hinted at divergent dips south of
the northern sand limit, suggesting the
possibility of an expanded
stratigraphic
section in the Lower Cotton Valley. In 2000
a more favorable price environment resulted
in accelerated field development, during
which a number of wells were found to
have pay intervals partially faulted out.
These new data prompted a large 3-D survey
over the field that defined it as a prolific
tight gas reservoir producing from Lower
Cotton Valley sands at a depth of 12,000
to 15,500 feet along a growth-faulted
anticlinal
trap
.
More sleeping giants such as Vernon likely exist in this seemingly mature petroleum province. Finding them will require careful analysis of often sparse well and seismic data, the willingness to drill an adequate pilot program to fully assess the resource, and aggressive optimization of drilling and completion practices.
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