Certain aspects of prestack deconvolution
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909280570966016 |
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| author | Singh, Jagmeet |
| author_facet | Singh, Jagmeet |
| contents | In a previous paper, we had shown that because of varying angles of incidence there is a varying degree of convolution down a trace and across a gather, necessitating deconvolution operators varying with time and offset. This idea is examined further in $t$-$x$ as well as $τ$-$p$ domain. We suggest better ways to deconvolve data in $τ$-$p$ domain, taking into account varying degree of convolution in this domain. We derive formulae for periods of surface multiples in $τ$-$p$ domain, e.g., water column peg-legs and reverberations, which have a fixed period depending only on the value of $p$ -- and suggest a way to check/revise the picked velocity using the formulae, provided the multiples are well separated from the primary. Periodicity of two way surface multiples is also studied. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_03089 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Certain aspects of prestack deconvolution Singh, Jagmeet Geophysics In a previous paper, we had shown that because of varying angles of incidence there is a varying degree of convolution down a trace and across a gather, necessitating deconvolution operators varying with time and offset. This idea is examined further in $t$-$x$ as well as $τ$-$p$ domain. We suggest better ways to deconvolve data in $τ$-$p$ domain, taking into account varying degree of convolution in this domain. We derive formulae for periods of surface multiples in $τ$-$p$ domain, e.g., water column peg-legs and reverberations, which have a fixed period depending only on the value of $p$ -- and suggest a way to check/revise the picked velocity using the formulae, provided the multiples are well separated from the primary. Periodicity of two way surface multiples is also studied. |
| title | Certain aspects of prestack deconvolution |
| topic | Geophysics |
| url | https://arxiv.org/abs/2408.03089 |