Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Land-reflection type
Patent
1992-06-25
1992-12-22
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Land-reflection type
367 21, G01V 136
Patent
active
051738791
ABSTRACT:
A method is provided for adaptive minimum-phase deconvolution. The deconvolution method removes source and receiver wavelet variations in a surface-consistent manner from traces of a seismic survey which has the traces indexed by source and receiver locations. A plurality of source-pairs and a plurality of a receiver-pairs are selected from the traces. Each source-pair has two designated sources and each receiver-pair has two designated receivers. Cross-correlations are performed on traces in each source-pair which have common receivers to provide a source-pair cross-correlation signal for each common receiver. Cross-correlation are performed on traces in each receiver-pair which have common sources to provide a receiver-pair cross-correlation signal for each common source. The cross-correlation signals of each receiver-pair and each source-pair are stacked to provide stacked cross-correlation signals. The stacked signals are then used in a surface-consistent convolutional model to obtain within a selected bandpass an amplitude frequency spectrum for each source and receiver wavelet. In one embodiment, an edited amplitude spectrum is obtained. A minimum-phase wavelet spectrum is then determined from each edited amplitude spectrum using a Hilbert transform. The minimum-phase wavelet spectra are then used to determine a two-sided finite-length time domain deconvolution filter for each source and receiver location. The respective filters for each location are then convolved with the trace to deconvolve the trace.
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Seismic Data Processing, Ozdogan Yilmaz; Stephen M. Doherty, Editor, Society of Exploration Geophysicists, Tulsa, Okla., p. 506.
Chapman Stephen J.
Corcoran Chris T.
Cung Vu K.
Devi Kattemalvadi R. S.
Flowers, Jr. Elliott G.
Lobo Ian J.
Reynolds, Jr. Fred S.
Shell Oil Company
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