Patent ID: 9651693
Date: 2017-05-16
CPC Classifications: G01V

Claim:
1. A method for preserving seismic reflections associated with a surface of a target in data acquired by seismic surveying, said method comprising: acquiring data using receivers placed above an underground formation at two different times, said data representing detected reflections of seismic excitations emitted by one or more sources to propagate inside the underground formation; inputting information about said surface inside the underground formation, where 4D changes are expected; establishing a correspondence between each of a plurality of source and receiver pairs and one of a plurality of reflection bins on said input surface; generating one or more sorted subsets of seismic traces from a plurality of seismic traces based on said plurality of reflection bins and a plurality of dataset classes; selecting one or more seismic traces from said sorted subset of seismic traces; and outputting said one or more seismic traces to be used to determine said 4D changes.