POLYCOR Method of Statics Correction and Raw Data Quality Control for 3D Acquisition Geometries

摘要

POLYCOR is an alternative method of static shifts correction in CDP data processing based on multiple correlations. It is based on four-factor model of time shifts. This model includes kinematical shifts, dip shifts and shot point (SP) / observation point (OP) statics. ?POLYCOR? method features high noise immunity. Accuracy of SP and OP statics determination in practice does not depend on shift values (for wide range of shifts values). When using this method it is not necessary to involve a priori estimation of velocity. Paper contains description and efficiency estimation of ?POLYCOR? method. Efficiency estimation is based on the synthetic data experiment. Results of synthetic data experiment are described and illustrated. Synthetic data experiment results confirm that an accuracy of SP static determination does not depend on a priori defined OP static shifts and accuracy of OP static determination in turn does not depend on a priori defined SP static shifts. Presence of white noise in signal in most cases does not affect accuracy and reliability of algorithm.