Increasing similarity between seismic datasets

A computing device for seismic monitoring of a subsurface including an oil and/or gas reservoir, the computing device comprising:

• a database comprising the first seismic dataset acquired during a base seismic survey of the subsurface and the second seismic dataset acquired during a monitor seismic survey conducted after the base seismic survey;
• and
• a processor in communication with the database and configured to:
• migrate the first seismic dataset and second seismic dataset to a dip angle image domain;
• use the migrated first seismic dataset and the migrated second seismic dataset in the dip angle image domain to calculate a set of decimating weights which, when applied to the first seismic dataset and the second seismic dataset, maximize a similarity between the first seismic dataset and the second seismic dataset;
• apply the set of decimating weights to the first seismic dataset and the second seismic dataset;
• and
• generate an image of changes in the subsurface using the first seismic dataset and the second seismic dataset following application of the decimating weights.

A non-transitory computer readable medium including computer executable instructions, wherein the instructions, when executed by a computer, implement a method for seismic monitoring of a subsurface including an oil and/or gas reservoir, the method comprising:

• obtaining the first seismic dataset acquired during a base seismic survey of the subsurface;
• obtaining the second seismic dataset acquired during a monitor seismic survey of the subsurface conducted after the base seismic survey;
• migrating the first seismic dataset and second seismic dataset to a dip angle image domain;
• using the migrated first seismic dataset and the migrated second seismic dataset in the dip angle image domain to calculate, with a processor, a set of decimating weights which, when applied to the first seismic dataset and the second seismic dataset, maximize a similarity between the first seismic dataset and the second seismic dataset;
• applying the set of decimating weights to the first seismic dataset and the second seismic dataset;
• and
• generating an image of changes in the subsurface using the first seismic dataset and the second seismic dataset following application of the decimating weights.