FremgangsmÕte for Õ detektere seismiske hendelser, og for Õ detektere og korrigere geometri- og statikk-feil i seismiske data

摘要

Methods are provided for automatic detection of linear seismic events and the detected events are used in correction of statics and geometry error. According to an example embodiment, a method is provided for automatically detecting substantially linear seismic events in multiple element data, and for correcting geometry and statics errors, wherein at least one element of the data comprises a shot and at least one other element of the data comprises a receiver, for a common element gather of traces, the method comprising: band pass filtering the traces; computing the complex trace envelope of traces of the gather; filtering out a DC component of the traces; sorting the gather by a first element line, a first element, a second element line, a second element, and an offset bin, wherein a sorted gather of traces is defined; wherein said computing and said sorting define a sorted gather of complex trace envelopes; transforming the sorted gather of complex trace envelopes into a set of velocity stack trace envelopes; wherein said traces are divergence corrected before said transforming and wherein said traces are positive bulk time shifted before said transforming; picking events from the velocity stack trace envelopes; determining statics error based on said picking; correcting said statics error; determining geometry error based on said picking; and correcting said geometry error.