tomograph Magazines & Journals

Imaging seismic reflectors with crosshole and VSP tomographic data is only occasionally carried out using Kirchhoff-style migration schemes. We introduce a new kinematic method here for tomographically imaging reflectors. The scheme first picks up traveltimes of each reflected event from common-shot gather tomographic data. It then uses the picked ...

By ZZ Resistivity Imaging Pty. Ltd.

Crosshole seismic tomography often is applied to image the velocity structure of an interwell medium. If the rocks are anisotropic, the tomographic technique must be adapted to the complex situation; otherwise, it leads to a false interpretation. We propose a nonlinear kinematic inversion method for crosshole seismic tomography in composite ...

By ZZ Resistivity Imaging Pty. Ltd.

2.5-D modeling and inversion techniques are much closer to reality than the simple and traditional 2-D seismic wave modeling and inversion. The sensitivity kernels required in full waveform seismic tomographic inversion are the Fréchet derivatives of the displacement vector with respect to the independent anisotropic model parameters of the ...

By ZZ Resistivity Imaging Pty. Ltd.

The Applied Potential method finds important application in mineral exploration. To better understand the detection and delineation capabilities of the technique, especially where (conductive) mineralisation is discontinuous, we have carried out a series of laboratory experiments using a 3D tank model system. Crosshole electric measurements were ...

By ZZ Resistivity Imaging Pty. Ltd.

An iterative and constrained non-linear travel-time tomographic scheme is developed for imaging high-contrast inhomogeneities. The technique has been successfully tested using synthetic data. We have investigated the influence upon the image quality of the random errors in travel times for a cross-hole survey configuration. In the forward problem, ...

By ZZ Resistivity Imaging Pty. Ltd.