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Seismic
Data Acquisition
The
following equipment is used for seismic
reflection/refraction data acquisition:
- 120
channel Geometrics
RX 24 bit seismograph. The
seismograph is mounted in removable
housing in an air-conditioned instrument
truck "dog house."
- Six
channel Seistronix
RAS-24 seismograph. This seismograph is
used primarily for downhole seismic
recording. The RAS-24 seismograph is PC
based, highly portable, and can be
adapted readily for small scale seismic
refraction/reflection experiments.
- Seismic
recording cables have 20 feet take-outs.
Receivers are 40 Hz geophones, 3 phones
per string.
- Seismic
sources used in the field have included:
vibrator, mini-vibrator, sledge hammer,
buffalo gun, and EWG-1 (weight drop)
- For
downhole seismic acquisition a Geostuff
3 component slim borehole tool is
used.
ESRI
has the ability to do in-the-field QA/QC and
2-D, 3-D data processing. For most projects,
stacks and preliminary interpretations are
completed before the field
crew has demobilized.
Seismic
Data Processing and Analysis Laboratory
ESRI’s
Seismic Data Processing and Analysis
Laboratory occupies 1000 square feet on the
fourth floor of the James F. Byrnes Building
on the campus of the University of South
Carolina.
The
data processing platforms dedicated entirely
to seismic and geophysical applications
include:
- Sun
Ultra-60 workstation, 512 MB RAM, dual
450 MHz processors
- Sun
Ultra-60 workstation, 256 MB RAM, dual
360 MHz processors
- Two
Sun Sparc 10 workstations
- PC
Dell workstation, 3 Dell laptops
All
of the computers are on the ESRI computer
network, which affords access to a 36 inch
color HP plotter, B & W and color
printers, workstations, and numerous PCs.
Access is also available to the University
of South Carolina computer network.
Seismic
Data Processing
The
following seismic data processing software
is used:
- ProMAX,
2-D, 3-D, Landmark
Graphics Corporation.
Interactive 2-D, 3-D data processing
(UNIX).
- VISTA,
2-D, 3-D, VSP, Seismic
Image Software, Ltd.
Interactive 2-D, 3-D, VSP data
processing (NT)
- Seismic
Unix, Colorado
School of Mines, Center for Wave
Phenomena.
- SeisRefA,
Oyo
Inc. Seismic refraction
processing software.
(High-Resolution
Shear Wave Data Hubbard, Nebraska 1999)
Seismic
Data Modeling and Interpretation
The
following software for the interpretation
and modeling of seismic data is used:
- SeisWorks
2-D, 3-D, Landmark
Graphics Corporation.
2-D, 3-D seismic reflection
interpretation software (UNIX).
- Kingdom,
Seismic
Micro-Technology Inc. 2-D,
3-D seismic reflection interpretation
software (NT)
- Mira,
Oklahoma Seismic. Synthetic seismogram
generation.
- Syntool,
Landmark
Graphics Corporation.
Synthetic seismogram generation.
- GXII,
GX
Technology.
2-D seismic modeling (UNIX).
- AVO/Unix,
Hampson-Russell
Software Services, Ltd. AVO
attribute generation and analysis.
- Mesa,
Seismic
Image Software. 2-D
seismic modeling (NT).
- Field
Design, Seismic
Image Software. 3-D seismic
survey design software.
In
addition, ESRI is part of Landmark Graphics
Corporation University Grant Program.
(Seismic
Interpretation Milford, Nebraska 1999)
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