Physical Sciences and Mathematics Commons^™

Validation Of A 'Displacement Tomography' Inversion Method For Modeling Sheet Intrusions, Sarah J. Menassian

Dissertations, Master's Theses and Master's Reports - Open

The study of volcano deformation data can provide information on magma processes and help assess the potential for future eruptions. In employing inverse deformation modeling on these data, we attempt to characterize the geometry, location and volume/pressure change of a deformation source. Techniques currently used to model sheet intrusions (e.g., dikes and sills) often require significant a priori assumptions about source geometry and can require testing a large number of parameters. Moreover, surface deformations are a non-linear function of the source geometry and location. This requires the use of Monte Carlo inversion techniques which leads to long computation times. Recently, …

Amplitude-Versus-Angle Analysis And Wide-Angle-Inversion Of Crosswell Seismic Data In A Carbonate Reservoir, Mohamed S. Ibrahim

Dissertations, Master's Theses and Master's Reports - Open

Crosswell data set contains a range of angles limited only by the geometry of the source and receiver configuration, the separation of the boreholes and the depth to the target. However, the wide angles reflections present in crosswell imaging result in amplitude-versus-angle (AVA) features not usually observed in surface data. These features include reflections from angles that are near critical and beyond critical for many of the interfaces; some of these reflections are visible only for a small range of angles, presumably near their critical angle.

High-resolution crosswell seismic surveys were conducted over a Silurian (Niagaran) reef at two fields …