초록 ▼

A method for processing seismic data. The method includes receiving the seismic data acquired by at least two receivers that are disposed at different depths. The method may then time-align the seismic data, collect a portion of the time-aligned seismic data into a gather and sum the collected time-

A method for processing seismic data. The method includes receiving the seismic data acquired by at least two receivers that are disposed at different depths. The method may then time-align the seismic data, collect a portion of the time-aligned seismic data into a gather and sum the collected time-aligned seismic data in the gather. After summing the collected time-aligned seismic data in the gather, the method may widen a spectrum of the summed seismic data and generate an image of subsurface formations in the earth based on the widened spectrum.

대표청구항 ▼

1. A method for processing seismic data, comprising: receiving the seismic data acquired by at least two receivers that are disposed on different streamers at different depths;time-aligning the seismic data;collecting, using a processor, a portion of the time-aligned seismic data into a gather;summi

1. A method for processing seismic data, comprising: receiving the seismic data acquired by at least two receivers that are disposed on different streamers at different depths;time-aligning the seismic data;collecting, using a processor, a portion of the time-aligned seismic data into a gather;summing the collected time-aligned seismic data in the gather;widening a spectrum of the sum; andgenerating an image of subsurface formations in the earth based on the widened spectrum. 2. The method of claim 1, wherein time-aligning the seismic data comprises correcting for misalignment of the seismic data due to the at least two receivers being at the different depths. 3. The method of claim 1, wherein the time aligned seismic data represents seismic data acquired at a common depth. 4. The method of claim 3, wherein the common depth is at sea surface. 5. The method of claim 1, wherein time-aligning the seismic data comprises applying one or more time shift corrections to the seismic data acquired by each receiver such that the seismic data was acquired at a common depth. 6. The method of claim 1, wherein the gather is a common midpoint gather. 7. The method of claim 1, wherein the collected time-aligned seismic data is summed using a normal moveout (NMO) common midpoint stacking processing technique. 8. The method of claim 7, wherein using the NMO common midpoint stacking processing technique comprises performing an NMO correction on the collected time-aligned seismic data. 9. The method of claim 1, wherein the gather comprises one or more traces within a migration aperture that constructively interfere with each other. 10. The method of claim 1, wherein the collected time-aligned seismic data is summed using a prestack time or depth imaging process. 11. The method of claim 10, wherein the prestack time or depth imaging process is a Kirchhoff migration correction process. 12. The method of claim 10, wherein using the prestack time or depth imaging process comprises performing a migration moveout correction on the collected time-aligned seismic data. 13. The method of claim 1, wherein widening the spectrum comprises applying a spectral shaping filter to each summed seismic data. 14. The method of claim 1, wherein widening the spectrum comprises applying a zero-phase Wiener deconvolution filter to each summed seismic data. 15. A non-transitory computer-readable medium having stored thereon computer-executable instructions which, when executed by a computer, cause the computer to: receive seismic data acquired by at least two receivers that are disposed on different streamers at different depths; time-align the seismic data;collect a portion of the time-aligned seismic data into a gather;sum the collected time-aligned seismic data in the gather;widen a spectrum of the sum; andgenerate an image of subsurface formations in the earth based on the widened spectrum. 16. The non-transitory computer-readable medium of claim 15, wherein the computer-executable instructions that cause the computer to time-align the seismic data further comprises computer-executable instructions that cause the computer to apply one or more time shift corrections to the seismic data acquired by each receiver such that the seismic data was acquired at a common depth. 17. The non-transitory computer-readable medium of claim 15, wherein the collected time-aligned seismic data is summed using a normal moveout (NMO) common midpoint stacking processing technique. 18. The non-transitory computer-readable medium of claim 15, wherein the collected time-aligned seismic data is summed using a prestack time or depth imaging process. 19. The non-transitory computer-readable medium of claim 18, wherein the prestack time or depth imaging process is a Kirchhoff migration correction process. 20. A computer system, comprising: a processor; anda memory comprising program instructions executable by the processor to:receive seismic data acquired by at least two receivers that are disposed on different streamers at different depths;time-align the seismic data;collect a portion of the time-aligned seismic data into a gather;sum the collected time-aligned seismic data in the gather;widen a spectrum of the sum; andgenerate an image of subsurface formations in the earth based on the widened spectrum.