Processing of seismic data acquired using twin over/under streamers
AssigneeWesternGeco L. L. C.
InventorRalf Ferber
Life of this patent
Estimating the term…
Abstract
A method for processing seismic data acquired using a first over/under streamer and a second over/under streamer. In one implementation, the method may include estimating seismic data that would have been acquired by a third over/under streamer disposed at a depth equivalent to a distance separating the first over/under streamer from the second over/under streamer; and applying a dephase and sum algorithm to seismic data acquired by the first over/under streamer and the second over/under streamer and the estimated seismic data.
Claims20
A method for processing seismic data acquired using a first over/under streamer and a second over/under streamer, comprising:
- estimating seismic data that would have been acquired by a third over/under streamer disposed at a depth equivalent to a distance separating the first over/under streamer from the second over/under streamer using the seismic data acquired by one or more sensors on the first over/under streamer and the second over/under streamer, wherein the estimated seismic data comprises a ghost of up-going wave fields;
- and
- applying a dephase and sum algorithm to the seismic data acquired by the first over/under streamer and the second over/under streamer and the estimated seismic data, wherein the dephased seismic data represents seismic data that would have been acquired at a sea surface.
A computer-readable medium having stored thereon computer-executable instructions which, when executed by a computer, cause the computer to:
- apply a shift and subtract algorithm to seismic data acquired by a first over/under streamer and a second over/under streamer to generate simulated seismic data that would have been acquired by a third over/under streamer disposed at a depth equivalent to a distance separating the first over/under streamer from the second over/under streamer, wherein the simulated seismic data comprises a ghost of up-going wave fields;
- and
- apply a dephase and sum algorithm to the acquired seismic data and the simulated seismic data.
A computer system, comprising:
- a processor;
- and
- a memory comprising program instructions executable by the processor to:
- apply a shift and subtract algorithm to seismic data acquired by a first over/under streamer and a second over/under streamer to generate simulated seismic data that would have been acquired by a third over/under streamer disposed at a depth equivalent to a distance separating the first over/under streamer from the second over/under streamer, wherein the simulated seismic data comprises a ghost of up-going wave fields;
- apply a dephase algorithm to the acquired seismic data and the simulated seismic data;
- and
- sum the dephased seismic data.
Dependencies are inferred from the claim text.