Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps
Electromagnetic depth sounding (EMDS) data are computed for simulated multi-layer earth models at different frequencies and geometries using digital linear filters. Detectability of sub-surface layers is computed as point-to-point difference of data instances between threelayer - homogeneous lay...
| Main Authors: | , , |
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| Format: | Conference Paper |
| Published: |
2007
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| Online Access: | http://hdl.handle.net/20.500.11937/81201 |
| _version_ | 1848764333945782272 |
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| author | Nimmagadda, Shastri Dreher, Heinz Chakraborty, Kalyan |
| author_facet | Nimmagadda, Shastri Dreher, Heinz Chakraborty, Kalyan |
| author_sort | Nimmagadda, Shastri |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Electromagnetic depth sounding (EMDS) data are
computed for simulated multi-layer earth models at
different frequencies and geometries using digital linear
filters. Detectability of sub-surface layers is computed as
point-to-point difference of data instances between threelayer - homogeneous layer and two-layer - homogeneous
layer media for similar range of frequencies. H and Ktype earth models are also considered in the
computations. Response curves, computed for two
different layer earth media models are superimposed,
thus, the separation between curves is the direct
indication of the involved “detectability effect”. The
degree of separation among response curves between two
geometrically or parametrically changing data properties,
called resolution, has direct impact on detectability effect.
Though detectability does not provide any qualitative or
quantitative interpretation of data attributes, computed
detectability effect significantly changes EMDS response
resolution at varying layer-earth data attributes.
Knowledge on strength of detectability and scalable
properties among layer-earth media are interpreted based
on resolution and coherency between two model response
curves. Because of change in layered earth properties,
varying horizontal and vertical resolution and coherency
attributes between response curves provide considerable
detectability effect. This process, termed as data-mining,
facilitates extraction of knowledge of layer properties
within multi-layer earth media. This detectability effect
provides knowledge of n-layer-earth simulation, which
can effectively respond to and aid the interpretation of
actual geological models deduced from experimental
data. These studies could prove to be useful for
investigating shallow petroleum oil and gas seeps and
their associated sediment alterations in the basin margin
areas. |
| first_indexed | 2025-11-14T11:17:42Z |
| format | Conference Paper |
| id | curtin-20.500.11937-81201 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:17:42Z |
| publishDate | 2007 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-812012021-03-30T08:20:25Z Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps Nimmagadda, Shastri Dreher, Heinz Chakraborty, Kalyan Electromagnetic depth sounding (EMDS) data are computed for simulated multi-layer earth models at different frequencies and geometries using digital linear filters. Detectability of sub-surface layers is computed as point-to-point difference of data instances between threelayer - homogeneous layer and two-layer - homogeneous layer media for similar range of frequencies. H and Ktype earth models are also considered in the computations. Response curves, computed for two different layer earth media models are superimposed, thus, the separation between curves is the direct indication of the involved “detectability effect”. The degree of separation among response curves between two geometrically or parametrically changing data properties, called resolution, has direct impact on detectability effect. Though detectability does not provide any qualitative or quantitative interpretation of data attributes, computed detectability effect significantly changes EMDS response resolution at varying layer-earth data attributes. Knowledge on strength of detectability and scalable properties among layer-earth media are interpreted based on resolution and coherency between two model response curves. Because of change in layered earth properties, varying horizontal and vertical resolution and coherency attributes between response curves provide considerable detectability effect. This process, termed as data-mining, facilitates extraction of knowledge of layer properties within multi-layer earth media. This detectability effect provides knowledge of n-layer-earth simulation, which can effectively respond to and aid the interpretation of actual geological models deduced from experimental data. These studies could prove to be useful for investigating shallow petroleum oil and gas seeps and their associated sediment alterations in the basin margin areas. 2007 Conference Paper http://hdl.handle.net/20.500.11937/81201 10.1071/ASEG2007ab102 restricted |
| spellingShingle | Nimmagadda, Shastri Dreher, Heinz Chakraborty, Kalyan Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps |
| title | Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps |
| title_full | Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps |
| title_fullStr | Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps |
| title_full_unstemmed | Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps |
| title_short | Detectability by Electromagnetic Depth Sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps |
| title_sort | detectability by electromagnetic depth sounding - a data mining tool aiding interpretation of shallow sediments altered by oil & gas seeps |
| url | http://hdl.handle.net/20.500.11937/81201 |