Determination of the Long-wWave Static for Complex Near Surface Using Up-Hole Information. A Geostatistical Approach.

Near surface effects can severely affect the quality of information recorded in modern 3-D land seismic surveys. For instance, characterization and modeling of the near surface geology has become a requirement for the processing of these surveys. Information currently recorded to characterize near surface geology is in the form of up-hole and refraction surveys as well as the first arrivals of the 3-D reflection seismic records. The differences in the nature of these sources of information call for a methodology of integration that allows taking advantage of the different spatial sampling and resolution of these surveys. This paper present a case history that illustrates the application of geostatistical techniques to characterize and map the static corrections. The procedure integrates uphole information and the first arrivals of the 3-D reflection records of seismic surveys recorded in Volga region