Seismic Acquisition

Coordinators : A. Gisolf, D.J. Verschuur.
Project scope : The seismic acquisition research project deals with the relation between acquisition, surface and near surface effects on one hand and imaging on the other. The quality of seismic data and, ultimately, the seismic subsurface image strongly depends on data acquisition and near surface properties. Acquisition geometries influence the capability of imaging the desired reflection energy as well the capability to suppress undesired seismic events or coherent noise. Acquisition design criteria and design procedures are developed for economically constrained seismic surveying. Seismic data typically is irregularly and sparsely sampled along the spatial coordinates. Algorithms for the reconstruction of the seismic signals are developed. Efficiency is an important issue. The shallow, low velocity zone on land may cause significant problems in seismic imaging. This problem is addressed with the Common Focal Point (CFP) technology, where the effects of the shallow zone are incorporated in focusing operators. In multi-component seismology it is important to decompose the received wavefield into compressional and shear waves. For ocean bottom data decomposition algorithms are being developed. The project is supported by and further develops a facility for physical modelling.

The work in this project is strongly linked with the research topics of the "Seismic imaging" project (1.2) and the "Geologic modelling and seismic image characterisation‚ÄĚ project (1.3). Furthermore, it also links with the "Time lapse imaging and flow" (2.2) and the "Near- surface imaging " (3.2) projects within the CTG. Especially the connection with "Time-lapse imaging and flow" (2.2) is an obvious one: in the time-lapse mode of the seismic method, in the phase of the acquisition design for the monitoring survey, advantage can be taken of the experience obtained with the base survey.

Name author: rkonterman
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