An Efficient Amplitude Encoding Scheme for Reverse Time Migration

Hu, Jiangtao; Shao, Yu; Wang, M.X.; Wang, H.Z.; Osen, A.; Zhou, Hongbo

doi:10.3997/2214-4609.20141230

Cited by 1 publication

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“…In this way, the encoding correlation matrix will be a good approximation of the unit matrix since the introduced crosstalk noise in the gradient is weak (Hu et al . ). Since LSRTM also has the ability to handle the crosstalk noise (Dai and Schuster ), the reference distance for the encoding LSRTM can be even smaller than the recoding geometry of a single shot.…”

Section: Amplitude Encoding Least‐squares Reverse Time Migrationmentioning

confidence: 97%

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Efficient amplitude encoding least‐squares reverse time migration using cosine basis

Wang

Fang

et al. 2016

Geophysical Prospecting

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Least‐squares reverse time migration provides better imaging result than conventional reverse time migration by reducing the migration artefacts, improving the resolution of the image and balancing the amplitudes of the reflectors. However, it is computationally intensive. To reduce its computational cost, we propose an efficient amplitude encoding least‐squares reverse time migration scheme in the time domain. Although the encoding scheme is effective in increasing the computational efficiency, it also introduces the well‐known crosstalk noise in the gradient that degrades the quality of the imaging result. We analyse the cause of the crosstalk noise using an encoding correlation matrix and then develop two numerical schemes to suppress the crosstalk noise during the inversion process. We test the proposed method with synthetic and field data. Numerical examples show that the proposed scheme can provide better imaging result than reverse time migration, and it also generates images comparable with those from common shot least‐squares reverse time migration but with less computational cost.

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Section: Amplitude Encoding Least‐squares Reverse Time Migrationmentioning

confidence: 97%

“…; Hu et al . ). For plane‐wave encoding, the length of the time padding for large ray parameter may exceed the length of the shot record (Godwin and Sava ; Hu et al .…”

Section: Introductionmentioning

confidence: 97%

Efficient amplitude encoding least‐squares reverse time migration using cosine basis

Wang

Fang

et al. 2016

Geophysical Prospecting

View full text Add to dashboard Cite

show abstract

An Efficient Amplitude Encoding Scheme for Reverse Time Migration

Cited by 1 publication

References 0 publications

Efficient amplitude encoding least‐squares reverse time migration using cosine basis

Efficient amplitude encoding least‐squares reverse time migration using cosine basis

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