Q‐factor Estimation and Redatuming in a Lossy Medium Using the Marchenko Equation

Yury Alkhimenkov; Joeri Brackenhoff; Evert Slob; Kees Wapenaar

doi:10.3997/2214-4609.201801662

Q‐factor Estimation and Redatuming in a Lossy Medium Using the Marchenko Equation

Yury Alkhimenkov, Joeri Brackenhoff, Evert Slob, Kees Wapenaar

Applied Geophysics and Petrophysics

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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Abstract

Marchenko Imaging is a new technology in geophysics, which enables us to retrieve Green's functions at any point in the subsurface having only reflection data. One of the assumptions of the Marchenko method is that the medium is lossless. One way to circumvent this assumption is to find a compensation parameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. The main goals of this work are to: [1] use the Marchenko equation to estimate the attenuation in the subsurface, [2] find a compensation
parameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. We propose a novel approach which makes it possible to calculate an effective temporal Q‐factor of the medium between a virtual source in the subsurface and receivers at the surface. This method is based on the minimization of the artefacts produced by the lossless Marchenko scheme. Artefacts have a very specific behavior: if the input data to the Marchenko equation are over‐ or under‐ compensated, the resulting artefacts will have an opposite polarity. Thus, they can be recognized. This approach is supported by a synthetic example for a 1D acoustic medium without a free surface.

Original language	English
Title of host publication	80th EAGE Conference and Exhibition 2018
Subtitle of host publication	11-14 June, Copenhagen, Denmark
Publisher	EAGE
Number of pages	5
DOIs	https://doi.org/10.3997/2214-4609.201801662
Publication status	Published - 2018
Event	80th EAGE Conference and Exhibition 2018: Opportunities presented by the energy transition - Copenhagen, Denmark Duration: 11 Jun 2018 → 14 Jun 2018 Conference number: 80 https://events.eage.org/2018/EAGE%20Annual%202018

Conference

Conference	80th EAGE Conference and Exhibition 2018
Abbreviated title	EAGE 2018
Country/Territory	Denmark
City	Copenhagen
Period	11/06/18 → 14/06/18
Internet address	https://events.eage.org/2018/EAGE%20Annual%202018

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Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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@inproceedings{201a046842284f75a579a29f62b825f2,

title = "Q‐factor Estimation and Redatuming in a Lossy Medium Using the Marchenko Equation",

abstract = "Marchenko Imaging is a new technology in geophysics, which enables us to retrieve Green's functions at any point in the subsurface having only reflection data. One of the assumptions of the Marchenko method is that the medium is lossless. One way to circumvent this assumption is to find a compensation parameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. The main goals of this work are to: [1] use the Marchenko equation to estimate the attenuation in the subsurface, [2] find a compensationparameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. We propose a novel approach which makes it possible to calculate an effective temporal Q‐factor of the medium between a virtual source in the subsurface and receivers at the surface. This method is based on the minimization of the artefacts produced by the lossless Marchenko scheme. Artefacts have a very specific behavior: if the input data to the Marchenko equation are over‐ or under‐ compensated, the resulting artefacts will have an opposite polarity. Thus, they can be recognized. This approach is supported by a synthetic example for a 1D acoustic medium without a free surface.",

author = "Yury Alkhimenkov and Joeri Brackenhoff and Evert Slob and Kees Wapenaar",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.; 80th EAGE Conference and Exhibition 2018 : Opportunities presented by the energy transition, EAGE 2018 ; Conference date: 11-06-2018 Through 14-06-2018",

year = "2018",

doi = "10.3997/2214-4609.201801662",

language = "English",

booktitle = "80th EAGE Conference and Exhibition 2018",

publisher = "EAGE",

url = "https://events.eage.org/2018/EAGE%20Annual%202018",

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TY - GEN

T1 - Q‐factor Estimation and Redatuming in a Lossy Medium Using the Marchenko Equation

AU - Alkhimenkov, Yury

AU - Brackenhoff, Joeri

AU - Slob, Evert

AU - Wapenaar, Kees

N1 - Conference code: 80

PY - 2018

Y1 - 2018

N2 - Marchenko Imaging is a new technology in geophysics, which enables us to retrieve Green's functions at any point in the subsurface having only reflection data. One of the assumptions of the Marchenko method is that the medium is lossless. One way to circumvent this assumption is to find a compensation parameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. The main goals of this work are to: [1] use the Marchenko equation to estimate the attenuation in the subsurface, [2] find a compensationparameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. We propose a novel approach which makes it possible to calculate an effective temporal Q‐factor of the medium between a virtual source in the subsurface and receivers at the surface. This method is based on the minimization of the artefacts produced by the lossless Marchenko scheme. Artefacts have a very specific behavior: if the input data to the Marchenko equation are over‐ or under‐ compensated, the resulting artefacts will have an opposite polarity. Thus, they can be recognized. This approach is supported by a synthetic example for a 1D acoustic medium without a free surface.

AB - Marchenko Imaging is a new technology in geophysics, which enables us to retrieve Green's functions at any point in the subsurface having only reflection data. One of the assumptions of the Marchenko method is that the medium is lossless. One way to circumvent this assumption is to find a compensation parameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. The main goals of this work are to: [1] use the Marchenko equation to estimate the attenuation in the subsurface, [2] find a compensationparameter for the lossy reflection series so that the lossless Marchenko scheme can be applied. We propose a novel approach which makes it possible to calculate an effective temporal Q‐factor of the medium between a virtual source in the subsurface and receivers at the surface. This method is based on the minimization of the artefacts produced by the lossless Marchenko scheme. Artefacts have a very specific behavior: if the input data to the Marchenko equation are over‐ or under‐ compensated, the resulting artefacts will have an opposite polarity. Thus, they can be recognized. This approach is supported by a synthetic example for a 1D acoustic medium without a free surface.

U2 - 10.3997/2214-4609.201801662

DO - 10.3997/2214-4609.201801662

M3 - Conference contribution

BT - 80th EAGE Conference and Exhibition 2018

PB - EAGE

T2 - 80th EAGE Conference and Exhibition 2018

Y2 - 11 June 2018 through 14 June 2018

ER -

Q‐factor Estimation and Redatuming in a Lossy Medium Using the Marchenko Equation

Abstract

Conference

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