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Reducing Residual Moveout Seismic Anisotropy Model Using Three-Ray GMA (General Moveout Approximation)

Scientific Contributions Oil and Gas · Vol. 43 No. 3 (2020) · hlm. 125–133

DOI
10.29017/SCOG.43.3.553
ISSN
2541-0520, 2089-3361
Terbit
2020-12-30
Penerbit
Testing Center for Oil and Gas LEMIGAS
Bahasa
eng
Lisensi
creativecommons.org/licenses/by/4.0

Abstrak

A “ hockey stick” phenomenon is one of anisotropic effects that should be eliminated in marine seismic data. It can increase residual moveout at the far offsets and impact to the distortion of refl ection event amplitude, eventually, reduce the seismic imaging quality. Conventional hyperbolic moveout approximation, an algorithm isotropic model commonly used for seismic processing, has a drawback in supressing such phenomenon. It is also not reliable for medium anisotropy model and long offset data. Many researchers formulated nonhyperbolic moveout approimations but it has limitation analysis for inteval offset-depth ratio (ODR) more than four. We present three-ray generalized moveout approximation (three-ray GMA) for transversely isotropic medium with vertical axis of symmetry (VTI), which is a modifi ed non-hyperbolic moveout approximation from original GMA, to cover up of the weakness of the hyperbolic approximation. The objective of this study is to eliminate “ hockey stick” effect and minimize the residual moveout much smaller at once at the far offsets (offsetdepth ratio > 4). In this study, we used synthetic data for single layer model in VTI medium to calculate relative traveltime error for each recent method over a range of offsets (0 ≤ ODR ≤ 6) and anisotropic parameters (0 ≤  ≤ 0.5). We also make comparative method for multi layer and implement it in a velocity analysis and residual moveout calculation. The three-ray GMA shows a better capability than comparative method to reduce residual moveout for larger offset. This result is important for enhancing seismic imaging.

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Suprajitno MunadiAfiliasi tidak diketahui3
Emir Dzakwan Kamal ZeinLampung University1
Syamsurijal RasimengLampung University1
Harnanti Yogaputri HutamiSumatera Institute of Technology1
Chikita Mery YulianiAfiliasi tidak diketahui1
Renita Dwi VadilaAfiliasi tidak diketahui1
Mokhammad Puput ErlanggaAfiliasi tidak diketahui1
Darsono DarsonoSebelas Maret University1
Julikah JulikahAfiliasi tidak diketahui1
Muhamad Defi AryantoAfiliasi tidak diketahui1
Rosie A.SAfiliasi tidak diketahui1
Saputro R.AAfiliasi tidak diketahui1
Himawan SutantoAfiliasi tidak diketahui1
Bambang WidarsonoNational Research and Innovation Agency1
Junita Trivianty MusuAfiliasi tidak diketahui1
Andi RuswandiAfiliasi tidak diketahui1
Dumex PasaribuUniversitas Pertamina1
Kharis Surya WicaksanaUniversitas Pertamina1

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Sumber metadata: OAI-PMH (metadata jurnal) https://journal.lemigas.esdm.go.id/index.php/SCOG/oai, pertama di-harvest 10 Nov 2026, terakhir terlihat 10 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en">Reducing Residual Moveout Seismic Anisotropy Model Using Three-Ray GMA (General Moveout Approximation)</dc:title>
	<dc:creator xml:lang="en">Wijaksono, Egie</dc:creator>
	<dc:creator xml:lang="en">Purba, Humbang</dc:creator>
	<dc:subject xml:lang="en">three-ray GMA moveout approximation</dc:subject>
	<dc:subject xml:lang="en">residual moveout</dc:subject>
	<dc:subject xml:lang="en">hockey stick</dc:subject>
	<dc:subject xml:lang="en">anisotropy</dc:subject>
	<dc:description xml:lang="en">A “ hockey stick” phenomenon is one of anisotropic effects that should be eliminated in marine seismic data. It can increase residual moveout at the far offsets and impact to the distortion of refl ection event amplitude, eventually, reduce the seismic imaging quality. Conventional hyperbolic moveout approximation, an algorithm isotropic model commonly used for seismic processing, has a drawback in supressing such phenomenon. It is also not reliable for medium anisotropy model and long offset data. Many researchers formulated nonhyperbolic moveout approimations but it has limitation analysis for inteval offset-depth ratio (ODR) more than four. We present three-ray generalized moveout approximation (three-ray GMA) for transversely isotropic medium with vertical axis of symmetry (VTI), which is a modifi ed non-hyperbolic moveout approximation from original GMA, to cover up of the weakness of the hyperbolic approximation. The objective of this study is to eliminate “ hockey stick” effect and minimize the residual moveout much smaller at once at the far offsets (offsetdepth ratio &amp;gt; 4). In this study, we used synthetic data for single layer model in VTI medium to calculate relative traveltime error for each recent method over a range of offsets (0 ≤ ODR ≤ 6) and anisotropic parameters (0 ≤  ≤ 0.5). We also make comparative method for multi layer and implement it in a velocity analysis and residual moveout calculation. The three-ray GMA shows a better capability than comparative method to reduce residual moveout for larger offset. This result is important for enhancing seismic imaging.</dc:description>
	<dc:publisher xml:lang="en">Testing Center for Oil and Gas LEMIGAS</dc:publisher>
	<dc:date>2020-12-30</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.lemigas.esdm.go.id/index.php/SCOG/article/view/553</dc:identifier>
	<dc:identifier>10.29017/SCOG.43.3.553</dc:identifier>
	<dc:source xml:lang="en">Scientific Contributions Oil and Gas; Vol. 43 No. 3 (2020); 125-133</dc:source>
	<dc:source xml:lang="id">Scientific Contributions Oil and Gas; Vol 43 No 3 (2020); 125-133</dc:source>
	<dc:source>2541-0520</dc:source>
	<dc:source>2089-3361</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journal.lemigas.esdm.go.id/index.php/SCOG/article/view/553/316</dc:relation>
	<dc:rights xml:lang="en">Copyright (c) 2020 © Copyright by Authors. Published by LEMIGAS</dc:rights>
	<dc:rights xml:lang="en">https://creativecommons.org/licenses/by/4.0</dc:rights>
</oai_dc:dc>