|
Dr. James N. Kellogg Andean Geophysical Laboratory, Dept. of Geological Sciences, University of South Carolina, Columbia, SC 29208 ( 803)777-4501 / Fax: (803)777-9133  |
 Dept. of Geological Sciences University of South Carolina |
 |
|
MORE ON CASA 
|
Portable receivers using signals from satellites of
the Global Positioning System (GPS) have greatly expanded our ability to make precise geodetic measurements. These
measurements are yielding contraints on plate motion models, behavior at plate boundaries, and intraplate
deformation. As the lead U.S. academic institution in the NSF/NASA funded CASA (Central And South America)
GPS Project, USC took a leading role in this exciting technology. In 1988, 1990, 1991 and 1994 scientists in 34 countries cooperated in the world's
largest GPS campaigns and the first civilian global tracking netoworks.
Observers spent long nights in wet jungles, on cold
Andean peaks, and on barren rocks in the middle of the ocean to make the experiments possible. Additional field campaigns
were conducted in 1996, 1998 and 1999.
|
MORE ON PGP
|
The Peru Geophysical
Project (PGP) was a three year (1996-1999) interdisciplinary venture of the Andean Geophysical Laboratory (AGL) at the
University of South Carolina (USA) and PERUPETRO S.A., the Peruvian National Oil Company, to
interpret the geological and geophysical database for Peru's Andean Foothills and Adjacent
Basins. PERUPETRO joined the PGP as an Associate Member. The PGP was also sponsored
by Coastal Oil & Gas, Crestar Energy International, Elf Aquitaine, Mobil, Occidental Peruana, and
Shell.
Interpretations were based on open file data from the AGL and proprietary
aerogravity and aeromagnetic data, seismic profiles, and well log data. Sponsors have access
to digital point and line data where not prohibited by previous agreements. The gravity coverage
includes 17,000 land stations and over 19,000 km of aerial gravity flight lines, and the aeromagnetic surveys
cover 370,000 square kilometers of Peru's foreland basins. The project products, which include a
Map Atlas, Profile and Seismic Atlas, Technical Report and data CDs, provide the Associate
Member and Sponsors with maps, cross sections, and interpretations that will assist future
evaluation of Peru's Andean Foothills and adjacent sedimentary basins for hydrocarbon exploration.
|
The Bolivia Geophysical
Project (BGP) was a three
year (1996-1999) interdisciplinary venture of the Andean Geophysical Laboratory at the University of South Carolina (USA) and Yacimientos Petroliferos Fiscales Bolivianos (YPFB), the Bolivian National Oil Company, to interpret the geological and
geophyiscal database for Bolivia's Altiplano, Andean Foothills and Adjacent Basins. YPFB joined the BGP as an Associate
Member. The BGP was also sponsored by Elf Aquitaine, Mobil, and Occidental. Interpretations are based on open file data from the AGL and proprietary
aerogravity and aeromagnetic data, seismic profiles, and well log data. Sponsors have access
to digital point and line data where not prohibited by previous agreements. BGP aeromagnetic survey coverage includes over
509,000 square kilometers (160,000 line kms). The project products, which include a Map Atlas, Profile and Seismic Atlas,
Technical Report and data CDs, provide the Associate Member and Sponsors with maps, cross sections, and interpretations
that will assist future evaluation of Bolivia's Altiplano, Andean Foothills and adjacent sedimentary basins for hydrocarbon
exploration.|
MORE ON CGP
|
Hydrocarbon discoveries in Cusiana, Cupiagua,
Buenos Aires, and Opon-Cimitarra generated exploration excitement in the Eastern Cordillera and Foothills Belt of
Colombia. Exploration, however, has been limited by the difficulties of high quality seismic data acquisition within the
Cordillera itself and by uncertainty regarding the thickness of the sedimentary section. The
Colombian Geophysical Project (CGP) was a two year interdisciplinary project (1993-1995) to interpret the
geophysical and geologic data for Colombia's Eastern Cordillera and Foothills sponsored by: Amoco, Arco, Chevron, ECOPETROL, Exxon, Maxus,
Mobil, Occidental, Pecten, Texaco, Triton, and Unocal.
Empresa Colombiana de Petroleos (ECOPETROL) generously supplied aeromagnetic survey data. The
15,412 gravity points were provided by Shell (8571 stations), AGL, Maxus, and ECOPETROL. Seismic profiles were provided by
ECOPETROL, BP, Triton, Maxus, Shell, Elf Aquitaine, Texaco, and Citgo. Four regional profiles were interpreted with seismic
time sections, depth sections, gravity and magnetic models, and retrodeformed sections. Complete Bouguer, regional, residual,
total field aeromagnetic, Euler deconvolution, structural interpretation of Euler trends, structure map - base of Cretaceous, and
prospective areas maps were produced.
|
|
Last updated July 10, 2007 by Obi Egbue oegbue@geol.sc.edu http://www.geol.sc.edu/agl/ Copyright © the University of South Carolina |