Seismic
Sequence Stratigraphy of the Barnett Shale at
Newark East Field, Texas. U.S.
Gabriel Borges1, Prerna Singh1, Javier Perez1, Roger M. Slatt1, and Eric Eslinger2. (1) School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma, (2) Eric Geosciences, Inc. and School of Math and Science, The College of Saint Rose, Albany, New York [email protected]
A seismic
sequence stratigraphic framework for the Barnett
Shale has been developed from a 3D
seismic
volume acquired within the Newark
East field in the Fort Worth basin. Core description and high-resolution facies
analysis have revealed considerable internal stratigraphy within the Barnett
Shale in this area. Several lithofacies were identified in core and calibrated
to log response using a clustering analysis program (GAMLS), then correlated
across uncored wells, thus establishing the stratigraphic framework for the
seismic
interpretation
. Special processing of the
seismic
volume (SpikeManTM)
enhanced the resolution of the
data
, and a synthetic trace was generated to tie
the
seismic
to the well logs. The following five intervals were identified from
the
seismic
-log correlation: 1)
Upper Barnett Shale, 2) Forestburg Formation, (3) mudstone without calcareous
cement, 4) mudstone with calcareous cement (Singh et al., companion abstract),
and 5) interbeds of the above mudstones; the latter three facies are contained
within the Lower Barnett Shale. Isochron maps were constructed for each
interval as well as for the complete Lower Barnett Shale interval and the
entire Barnett Shale. The Forestburg formation thickens in a
southeast-northwest trend while the Lower Barnett Shale thickens in a
southwest-northeast trend. This latter trend is consistent with published
thickness trends of the entire Barnett Shale.
AAPG Search and Discover Article #90067©2007 AAPG Mid-Continent Section Meeting, Wichita, Kansas