초록 ▼

In ocean bottom seismic exploration, it is common for co-located hydrophones and geophones to be deployed on the ocean bottom. One problem encountered is the water column reverberation. An improved method and device is proposed for attenuating water column reverberations using co-located hydrophones

In ocean bottom seismic exploration, it is common for co-located hydrophones and geophones to be deployed on the ocean bottom. One problem encountered is the water column reverberation. An improved method and device is proposed for attenuating water column reverberations using co-located hydrophones and geophones in ocean bottom seismic processing. In this method, each recorded hydrophone and geophone signal, or trace, is decomposed into a series of narrow band-pass filtered traces. For each of the filtered traces, a measurement of the energy level is made upon which normalization factors are computed and applied. The resulting filtered, normalized traces are summed. Optionally, prior to application, the normalization factors can be organized by common shot, common group, common offset, and surface consistent normalization factors derived and applied for each pass-band.

대표청구항 ▼

[ What is claimed is:] [1.] A process for attenuating noise is co-located hydrophone/geophone data, said process comprising:receiving a hydrophone signal at a hydrophone seismic sensor located at a hydrophone/geophone receiver location from a seismic signal source;decomposing said hydrophone signal

[ What is claimed is:] [1.] A process for attenuating noise is co-located hydrophone/geophone data, said process comprising:receiving a hydrophone signal at a hydrophone seismic sensor located at a hydrophone/geophone receiver location from a seismic signal source;decomposing said hydrophone signal into a plurality of bandwidth-limited hydrophone signals;receiving a geophone signal at a geophone seismic sensor located at the hydrophone/geophone receiver location from the seismic signal source;decomposing said geophone signal into a plurality of bandwidth-limited geophone signals, the pass-bands of the bandwidth-limited geophone signals being substantially equal to the pass-bands of the bandwidth-limited hydrophone signals;normalizing said hydrophone and geophone signals; andcombining the normalized signals;wherein coherent noise is attenuated in the combined and normalized signals.