The impact of multifocusing in the processing of land 3D seismic data in a fold and thrust belt setting: Ranquil Norte Block, Neuquén Basin, Argentina. Geophysics, 52, 289–300.Ĭuria D., Borghi P., & Noble J., Berkovitch A., Justo D. Occam’s inversion: A practical algorithm for generating smooth models from electromagnetic sounding data.

SEG Technical Program Expanded Abstracts, 22(1), 51–54.Ĭonstable S.C., Parker R.L. Feasibility study for long offset seismic acquisition in a thrust-belt. Multifocusing as a method of improving subsurface imaging. SEG Technical Program Expanded Abstracts, 17(1), 1748–1751.īerkovitch A., Belfer I. The author demonstrates a retrospective overview of seismic data imaging in the area of the Polish Carpathian orogenic wedge and discusses the most recent global innovations in seismic methodology which are the key to successful hydrocarbon exploration in fold and thrust regions.īerkovich A.,1999. Interpreted time-domain horizons, supplemented by main thrusts, are used to make the velocity field fully-compatible with the litho-stratigraphic units of the Carpathians.

In the near-surface part, the uphole velocities are assigned to the formations, documented by the surface geologic map. For that reason, instead of the indus-try-standard utilization of tomography, a novel, geologically-consistent method of velocity model building is pro-posed. It revealed the lack of consistency between the results of 3D refraction tomography and both the sonic log and uphole velocities. In the presented study, the analysis of velocity values obtained in the shallow part of Carpathian orogenic wedge by means of various geophysical methods was carried out. The in-terpretation of refracted waves frequently remains the only available technique that may be used for this purpose, although one must be aware of its limitations which appear in the complex geological settings. There is no straightforward method that can provide structural representation of the near-surface geological boundaries and their velocities. Despite the increasing technological level of the reflection seismic method, the imaging of fold and thrust belts remains a demanding task, and usually leaves some questions regarding the dips, the shape of the subthrust structures or the most correct approach to velocity model building.

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