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Potential Fields Group Dinner Meeting

Thursday 20-Mar-08 5:30 PM to 8:30 PM CDT

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Hess Club

5430 Westheimer Rd.
Houston Texas 77056
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Speaker Dr. Mark E. Odegard

Company: Grizzly Geosciences

Event Description

Gluing Data Together:  Structural and Lithological Inversion using Gravity and Magnetic Data Integrated with Geological Information over Very Large Areas

Mark E. Odegard, Grizzly Geosciences


Abstract

Our interpretations over large areas begin with the integration of a wide variety of data.  The “glue” that we use to merge diverse data type is gravity, magnetic and DEM data.  To gain the highest resolution results, as much original survey data is used as possible.  For a recent project over Southeast Asia, China, Japan and Korea (SEACJK) we began with over 5 million line kilometers of bathymetric data.  The gravity data were over 1.5 million, and the Magnetic data were over 6 million line kilometers respectively.  Merging this much data requires a significant amount of technique development, which will be described.

Using the final integrated data, basin geometry and structure can be derived from the inversion of gravity and magnetic data. Using some newly developed techniques these inversions can also discriminate between different lithologies. Magnetic data can be inverted for magnetic basement and for intermediate layers of volcanic material. Gravity data can be inverted for structures which produce density contrasts in basins. Combining these results, basin structure can be explored to determine depth to basement, to high density structures such as carbonates, and to high susceptibility structures such as volcanics.

The newly integrated data allow us to extend our interpretation to all offshore basins and some onshore as well. We use the structural interpretations described above along with enhancements of gravity, magnetic and digital elevation model data. Combining these interpretations and enhancements with published data in a GIS environment allows us to constrain additional interpretations of tectonic development, sedimentary facies and structures in basins. Examples are shown for basins around the South China Sea, and some new work over the east coast of North and Latin America.

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 Event Contact

 Event Coordinator

Shawn Mulcahy Shawn Mulcahy
(281) 874-6050 (281) 874-6050
   

Potential Fields Group Dinner Meeting

Thursday 20-Mar-08 5:30 PM to 8:30 PM CDT

Speaker Dr. Mark E. Odegard

Company: Grizzly Geosciences

Biography

Dr. Odegard began to work in oil and gas exploration in 1983 at Sohio Petroleum Company where he was supervisor of the Seismic Analysis Group.  He joined Unocal in 1988 where he was supervisor of the Lito-Stratigraphic Workstation project, the Special Seismic Processing Group, and then developed the Exploration in Difficult Data Areas program.  Dr. Odegard was transferred to Sugar Land where he was supervisor of the potential fields group.  During this time he also did research on the emerging field of gravity gradiometry, sometimes called the “Full Tensor Gradient”.  He applied gradiometry to structural salt modeling in the Gulf of Mexico over the Flex-Trend.

After leaving Unocal, Dr. Odegard became Vice President and manger of GETECH, Inc., which was a subsidiary of GETECH, Ltd. in Leeds, UK.  He worked with Bill Dickson in the development of the SAMBA project over the South Atlantic basins, which has been licensed to over 14 oil companies.  He also worked on a large number of projects over many areas of the world, both for clients and as spec projects.  This work has carried over to his own consulting company, Grizzly Geosciences, Inc., after the reorganization of GETECH.

Dr. Odegard has also held positions as Assistant Researcher and Professor at the University of Hawaii, Director of the Geology and Geophysics Research Program for the U.S. Navy, Associate Professor of Physics and Geology at New Mexico State University, and Principal Scientist at the Basalt Waste Isolation Project at Richland, Washington.  He has over 150 scientific publications.

His education includes a Ph.D. from the University of Hawaii in Geology and Geophysics, a M.S. from Oregon State University in Physics with an Option in Geophysics, and joint B.A.’s is Physics and Mathematics from the University of Montana.

Potential Fields Group Dinner Meeting

Thursday 20-Mar-08 5:30 PM to 8:30 PM CDT

Hess Club

5430 Westheimer Rd.
Houston Texas 77056
Google Maps | Hotels Near | Yahoo! Maps | Weather Forecast

Potential Fields Group Dinner Meeting

Thursday 20-Mar-08 5:30 PM to 8:30 PM CDT

 
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20-Mar-08 5:30 PM
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20-Mar-08 5:30 PM
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20-Mar-08 5:30 PM
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