Adaptive deghosting for complex geometries in the Gulf of Mexico

Zarkhidze, Alexander; Oraghalum, Ebele; Lansky, Carina; Raskopin, A.; Bloor, Robert

doi:10.1190/segam2016-13868686.1

Cited by 18 publications

(2 citation statements)

References 7 publications

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“…To ensure that all four datasets combine seamlessly, the four legacy datasets were re-datumed to mean sea level during adaptive deghosting (Rickett, 2014;Zarkhidze, et al, 2016) and was followed by water velocity correction (Carvill, 2009) and survey matching. Following this, the combined legacy data were used together for surface multiple prediction (Dragoset et al, 2010) to increase crossline aperture, and therefore improving the surfacemultiple modeling and elimination.…”

Section: Data Preparation For Imagingmentioning

confidence: 99%

Post-migration image optimization of multi-azimuth legacy data in Central Santos Basin

2021

Proceeding of the 17th International Congress of the Brazilian Geophysical

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In complex presalt reservoirs such as the Santos Basin in Brazil, improvements in our techniques for combining and imaging legacy datasets can postpone the need for additional costly seismic acquisitions. In this case study, we show how data from several legacy acquisitions with varying azimuths were carefully combined to create a contiguous multi-azimuth image. Two different migration algorithms are used with each having tailored approaches for the weighting and summation of the migrated data. Compared to the legacy image, significant improvement is attained in terms of signal-to-noise ratio, the coherency of evaporite layers, base salt, presalt, and basement events, and the delineation of the pre-salt faults.

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Section: Data Preparation For Imagingmentioning

confidence: 99%

Post-migration image optimization of multi-azimuth legacy data in Central Santos Basin

2021

Proceeding of the 17th International Congress of the Brazilian Geophysical

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“…안정성 평가나 지하 매설물 탐지와 같은 목적을 수행하 기 위해서는 높은 해상도의 지하 지질구조 영상화가 필수 적이어서 탐사자료의 해상도를 향상시킬 수 있는 자료처리 기법 적용이 요구된다. 탄성파 탐사자료의 해상도를 저하시키는 여러 요인 중 고스트(Ghost)는 해수면으로부터 반사되어 기록되는 매우 짧은 주기를 갖는 신호를 의미한다 (Lindsey, 1960) (Posthumus, 1993;Carlson et al, 2007;Soubaras and Dowle, 2010)과 취득된 자료에 대해 고스트를 제거하는 기 법 등이 활발히 연구되고 있다 (Grion et al, 2015;Hardwick et al, 2015;Zarkhidze et al, 2016;Sun and Verschuur, 2018)…”

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Application of Deghosting and Designature for High-Resolution Seismic Data

Kim¹,

Chung

Shin

et al. 2021

ksmer

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An integrated broadband preprocessing method for towed-streamer seismic data

Aharchaou

Neumann

2020

GEOPHYSICS

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Broadband preprocessing has become widely used for marine towed-streamer seismic data. In the standard workflow, far-field source designature, receiver and source-side deghosting, and redatuming to mean sea level are applied in sequence, with amplitude compensation for background [Formula: see text] delayed until the imaging or postmigration stages. Thus, each step is likely to generate its own artifacts, quality checking can be time-consuming, and broadband data are only obtained late in this chained workflow. We have developed a unified method for broadband preprocessing — called integrated broadband preprocessing (IBP) — which enables the joint application of all the above listed steps early in the processing sequence. The amplitude, phase, and amplitude-variation-with-offset fidelity of IBP are demonstrated on pressure data from the shallow, deep, and slanted streamers. The integration allows greater sparsity to emerge in the representation of seismic data, conferring clear benefits over the sequential application. Moreover, time sparsity, full dimensionality, and early amplitude [Formula: see text] compensation all have an impact on broadband data quality, in terms of reduced ringing artifacts, improved wavelet integrity at large crossline angles, and fewer residual high-frequency multiples.

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Adaptive deghosting for complex geometries in the Gulf of Mexico

Cited by 18 publications

References 7 publications

Post-migration image optimization of multi-azimuth legacy data in Central Santos Basin

Post-migration image optimization of multi-azimuth legacy data in Central Santos Basin

Application of Deghosting and Designature for High-Resolution Seismic Data

An integrated broadband preprocessing method for towed-streamer seismic data

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