Advanced oil recovery technologies for improved recovery from slope basin clastic reservoirs, Nash Draw Brushy Canyon Pool, Eddy County, NM. Quarterly technical progress report (seventh quarter), April 1--June 30, 1997 Page: 4 of 14
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Communication and coordination between the team members located in diverse
geographic areas requires the use of state-of-the-art communication systems. Therefore, to
meet our reporting requirements, we use a combination of E-mail, the Internet, and high
capacity data transfer to successfully exchange data and conclusions among the groups.
Geology
In order to benefit from the reservoir characterization, 3-D seismic and reservoir
simulation information, the geology of the Nash Draw Pool (NDP) should fit into an-
accepted geological model. Once the project is set within the confines of the model, the data
gleaned from this project may then be applied to other fields in a similar geological setting
in this and other basins.
We have established. that each of the reservoirs in the study is actually a series of
stacked micro-reservoirs forming an amalgamated composite reservoir. The "L'sand appears
to have a "primary" depositional area and a fringing "secondary" depositional area as
exhibited by the seismic results: The secondary depositional composites are more disjointed
and isolated, forming an apron in front of the primary area. While the original subsurface
mapping interpretations suggested a stricter, more linear channel morphology, the geological
model derived from the 3-D seismic data volume suggests a less linear morphology. The
reservoir sand distribution, as a function of the composite porosity of the thin-bed turbidite
reservoirs, has a lobate morphology that trends in a north - south direction. This morphology
is clearly seen in "L" sand reflection amplitude plot. The NDP is within the mid- to distal
portion of the lobe.
The sands are part of a lowstand systems tract. They are probably of eolian origin
and were transported basin-ward through shelf by-pass systems. They may fit into what
would be a mid-slope turbidite sequence of shingled turbidites, part of a prograding complex
in Vail's scheme. Shingled turbidites are comprised of amalgamated sands that appear to be
continuous. The sands seem to fit the seismic criteria as well. The internal seismic
architecture is discontinuous and chaotic, within localized sequence boundaries. The seismic
expression is an overall tabular unit with subparallel to basinal thinning reflections.
The unit extends across the 3-D volume indicating a widespread sheet of
amalgamated turbidites. From log to log, the "L" sand appears to be continuous throughout
the unit as well. This is a preliminary interpretation of a geological model for the NDP.
Further study of the NDP Well #23 core and case studies in the literature will be
undertaken to more clearly define the geologic model that best fits the basal Brushy Canyon
sands in the NDP. High resolution sequence stratigraphic analysis from the well logs will be
incorporated and integrated with the seismic data as well.3
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Advanced oil recovery technologies for improved recovery from slope basin clastic reservoirs, Nash Draw Brushy Canyon Pool, Eddy County, NM. Quarterly technical progress report (seventh quarter), April 1--June 30, 1997, report, July 30, 1997; United States. (https://digital.library.unt.edu/ark:/67531/metadc691648/m1/4/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.