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Relevant bibliographies by topics / Wave Equation Datuming

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Journal articles

Academic literature on the topic 'Wave Equation Datuming'

Author: Grafiati

Published: 11 March 2023

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Journal articles on the topic "Wave Equation Datuming"

1

Gong, Xufei, Qizhen Du, Qiang Zhao, Pengyuan Sun, Jianlei Zhang, and Zhenping Tian. "Elastic wave-equation datuming." GEOPHYSICS 83, no. 5 (2018): U51—U61. http://dx.doi.org/10.1190/geo2017-0672.1.

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Wave-equation datuming (WED) techniques have demonstrated superiority when waves occur on the acquisition surface nonvertically, and traditional static corrections based on the time shift become inaccurate. Meanwhile, as for multicomponent data, those scalar techniques can hardly maintain the vector characteristics for the following multicomponent data processing flows. Considering this, we have developed an elastic-wave datuming approach to handle the static corrections for multicomponent data. Different from those existing scalar WED techniques, the multicomponent data are first decomposed i

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2

Bevc, Dimitri. "Flooding the topography: Wave‐equation datuming of land data with rugged acquisition topography." GEOPHYSICS 62, no. 5 (1997): 1558–69. http://dx.doi.org/10.1190/1.1444258.

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Wave‐equation datuming overcomes some of the problems that seismic data recorded on rugged surface topography present in routine image processing. The main problems are that (1) standard, optimized migration and processing algorithms assume data are recorded on a flat surface, and that (2) the static correction applied routinely to compensate for topography is inaccurate for waves that do not propagate vertically. Wave‐based processes such as stacking, dip‐moveout correction, normal‐moveout correction, velocity analysis, and migration after static shift can be severely affected by the nonhyper

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3

Schneider, William A., Lindy D. Phillip, and Ernest F. Paal. "Wave‐equation velocity replacement of the low‐velocity layer for overthrust‐belt data." GEOPHYSICS 60, no. 2 (1995): 573–79. http://dx.doi.org/10.1190/1.1443795.

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Seismic land data are commonly plagued by nonhyperbolic distortions induced by a variable near‐surface, low‐velocity layer (LVL). First‐arrival refraction analysis is conventionally employed to estimate the LVL geometry and velocities. Then vertical static time shifts are used to replace the LVL velocities with the more uniform, faster velocities that characterize the underlying refracting layer. This methodology has earned a good reputation as a geophysical data processing tool; however, velocity replacement with static shifts assumes that no ray bending occurred at the LVL base and that wave

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4

Beresford, G., and C. Hurst. "Wave-Equation Datuming on a Micro-Computer." Exploration Geophysics 22, no. 1 (1991): 41–44. http://dx.doi.org/10.1071/eg991041.

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5

Yang, Kai, Yu-Zhu Liu, Jian-Hua Geng, and Zai-Tian Ma. "Upward continuation with topographic datuming operator: the integrated wave equation datuming scheme revised." Geophysical Prospecting 57, no. 6 (2009): 943–56. http://dx.doi.org/10.1111/j.1365-2478.2009.00790.x.

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6

Tinivella, U., M. Giustiniani, and R. Nicolich. "Wave equation datuming applied to S-wave reflection seismic data." Journal of Applied Geophysics 152 (May 2018): 167–72. http://dx.doi.org/10.1016/j.jappgeo.2018.03.015.

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7

Liu, Wenge, Bo Zhao, Hua-wei Zhou, Zhenhua He, Hui Liu, and Zengli Du. "Wave-equation global datuming based on the double square root operator." GEOPHYSICS 76, no. 3 (2011): U35—U43. http://dx.doi.org/10.1190/1.3555076.

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Current schemes for removing near-surface effects in seismic data processing use either static corrections or wave-equation datuming (WED). In the presence of rough topography and strong lateral velocity variations in the near surface, the WED scheme is the only option available. However, the traditional procedure of WED downward continues the sources and receivers in different domains. A new wave-equation global-datuming method is based on the double-square-root operator, implementing the wavefield continuation in a single domain following the survey sinking concept. This method has fewer app

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8

Larkin, Steven P., and Alan Levander. "Wave-equation datuming for improving deep crustal seismic images." Tectonophysics 264, no. 1-4 (1996): 371–79. http://dx.doi.org/10.1016/s0040-1951(96)00137-0.

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9

Reshef, Moshe. "Depth migration from irregular surfaces with depth extrapolation methods." GEOPHYSICS 56, no. 1 (1991): 119–22. http://dx.doi.org/10.1190/1.1442947.

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Nonflat surface topography introduces a numerical problem for migration algorithms that are based on depth extrapolation. Since the numerically efficient migration schemes start at a flat interface, wave‐equation datuming is required (Berryhill, 1979) prior to the migration. The computationally expensive datuming procedure is often replaced by a simple time shift for the elevation to datum correction. For nonvertically traveling energy this correction is inaccurate. Subsequent migration wrongly positions the reflectors in depth.

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10

Berryhill, John R. "Submarine canyons: Velocity replacement by wave‐equation datuming before stack." GEOPHYSICS 51, no. 8 (1986): 1572–79. http://dx.doi.org/10.1190/1.1442207.

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Submarine canyons incised into the continental slope interfere with the quality of common‐midpoint (CMP) stacked seismic data obtainable from reflectors beneath the sea floor. The interference problem is caused by rough topography in conjunction with the contrast between the acoustic velocity of sea water and the velocity of the exposed rock layers. Geophysicists have long recognized that part of the solution is to replace the traveltimes of raypaths through the water by their traveltimes through an identical thickness of rock. However, use of wave‐equation datuming to effect velocity replacem

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