Abstract: Apparatus, computer instructions and method for combining first and second records to form a substantially deghosted seismic record.

Abstract: A method and a system of acquiring and processing multi-source broadband marine seismic data in such a way that at least a part of said acquired data is partially or fully de-ghosted on the receiver side and then partially or fully re-assembled to a pre-stack dataset. At least one non-uniformly horizontal streamer is towed and at least two seismic sources emit seismic signals at spaced apart positions. Further presented is a method of processing marine seismic data by using the thus resulting notch diversity in these two (or more) seismic records to de-ghost the dataset, gathering two or more recorded seismic signals having substantially the same source-sensor offset and substantially the same common mid-point at different sensor depths, the sensor depths at least different enough to enable identification of seismic signals originating from ghosting. The gather is de-ghosted, thus obtaining seismic data with significantly broader bandwidth.

Abstract: Apparatus, computer instructions and method for combining first and second records to form a substantially deghosted seismic record.

Abstract: A method and a system of acquiring and processing multi-source broadband marine seismic data in such a way that at least a part of said acquired data is partially or fully de-ghosted on the receiver side and then partially or fully re-assembled to a pre-stack dataset. At least one non-uniformly horizontal streamer is towed and at least two seismic sources emit seismic signals at spaced apart positions. Further presented is a method of processing marine seismic data by using the thus resulting notch diversity in these two (or more) seismic records to de-ghost the dataset, gathering two or more recorded seismic signals having substantially the same source-sensor offset and substantially the same common mid-point at different sensor depths, the sensor depths at least different enough to enable identification of seismic signals originating from ghosting. The gather is de-ghosted, thus obtaining seismic data with significantly broader bandwidth.

Abstract: A method of evaluating a seismic survey to be carried out at a particular survey location comprises choosing an initial seismic surveying arrangement. One or more parameters of AVO (amplitude versus offset) uncertainty are then determined from the seismic surveying arrangement using a model of the earth's interior at the survey location. If the parameter(s) of AVO uncertainty are not acceptable the seismic surveying arrangement is changed, and the AVO uncertainty parameter(s) re-determined for the new acquisition geometry.