A Deterministic Evaluation of eismic Fidelity using Velocity Modeling ...
A Deterministic Evaluation of eismic Fidelity using Velocity Modeling ...
A Deterministic Evaluation of eismic Fidelity using Velocity Modeling ...
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From the interpretation <strong>of</strong> salt it appears that a transition from active diapirism to passive<br />
diapirism took place as the salt progresses upward through the section. I based my<br />
interpretation <strong>of</strong> the salt tectonics on the changes in salt geometry and the structural<br />
components associated with the salt. Improvements in the resolution provide detailed data<br />
to calculate a kinematic ratio <strong>of</strong> A/R and R/A <strong>of</strong> the salt. A kinematic ratio is a method<br />
used to determine the growth stage <strong>of</strong> the salt dome. I also used structural data such as<br />
radial faults to identify the growth stage <strong>of</strong> the salt dome.<br />
My stratigraphic interpretations were also considerably more detailed with the PSDM<br />
volume. Of particular interest is the imaging <strong>of</strong> stream channels not imaged in the<br />
PSTM. These gave a more precise understanding <strong>of</strong> the stratigraphy and specifically the<br />
drainage systems around Vinton Dome in the Miocene. Improved resolution near the salt<br />
also provided the ability to see the influence <strong>of</strong> salt on the dip <strong>of</strong> the beds and potential<br />
areas <strong>of</strong> sand ponding.<br />
Structural features such as the dips <strong>of</strong> beds can be significant in terms <strong>of</strong> petroleum<br />
exploration. With these data strata can be imaged beneath salt overhangs that previously<br />
were not imaged; these can be potential hydrocarbon traps. These features are also<br />
significant in understanding the salt tectonics. Other features relevant to salt tectonics are<br />
the large growth fault that controls the salt movement and the smaller radial faults that<br />
indicate passive or active diapirism. These data strongly indicate that the large<br />
controlling fault is a high angle, counter regional growth fault, further substantiating the<br />
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