Attenuation of spatial aliasing in CMP domain by non-linear interpolation of seismic data along local slopes

نویسندگان

1 Post-Doc, Department of Earth Physics, Institute of Geophysics, University of Tehran, Iran

2 Professor, Department of Earth Physics, Institute of Geophysics, University of Tehran, Iran

3 Professor, Department of Exploration Geophysics, Curtin University of Technology, Perth, Western Australia

چکیده

Spatial aliasing is an unwanted side effect that produces artifacts during seismic data processing, imaging and interpolation. It is often caused by insufficient spatial sampling of seismic data and often happens in CMP (Common Mid-Point) gather. To tackle this artifact, several techniques have been developed in time-space domain as well as frequency domain such as frequency-wavenumber, frequency-space, and frequency-time. The main advantages of seismic interpolation in time-space domain over frequency domain are: a) frequency components of the initial signals are preserved, and b) the prior knowledge that a seismic event consists of many plane wave segments, can be used. Using the later advantage, a seismic event can be predicted by pursuing the continuity of seismic events in a trace-by-trace manner. This process, which has become popular in seismic data reconstruction and imaging within the past few years, is known as predictive painting. We use predictive painting to predict the wavefronts and two-way-travel time curves in regularly sampled CMP gathers followed by increasing the number of traces by cubic interpolation. Then, the amplitude of the interpolated trace is obtained by averaging the amplitudes of the neighbouring traces. Performance of the proposed method is demonstrated on several synthetic seismic data examples as well as a field data set.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Attenuation of spatial aliasing in CMP domain by non-linear interpolation of seismic data along local slopes

نویسندگان [English]

  • Mohammad Javad Khoshnavaz 1
  • Hamid Reza Siahkoohi 2
  • Andrej Bóna 3
1 Post-Doc, Department of Earth Physics, Institute of Geophysics, University of Tehran, Iran
2 Professor, Department of Earth Physics, Institute of Geophysics, University of Tehran, Iran
3 Professor, Department of Exploration Geophysics, Curtin University of Technology, Perth, Western Australia
چکیده [English]

Spatial aliasing is an unwanted side effect that produces artifacts during seismic data processing, imaging and interpolation. It is often caused by insufficient spatial sampling of seismic data and often happens in CMP (Common Mid-Point) gather. To tackle this artifact, several techniques have been developed in time-space domain as well as frequency domain such as frequency-wavenumber, frequency-space, and frequency-time. The main advantages of seismic interpolation in time-space domain over frequency domain are: a) frequency components of the initial signals are preserved, and b) the prior knowledge that a seismic event consists of many plane wave segments, can be used. Using the later advantage, a seismic event can be predicted by pursuing the continuity of seismic events in a trace-by-trace manner. This process, which has become popular in seismic data reconstruction and imaging within the past few years, is known as predictive painting. We use predictive painting to predict the wavefronts and two-way-travel time curves in regularly sampled CMP gathers followed by increasing the number of traces by cubic interpolation. Then, the amplitude of the interpolated trace is obtained by averaging the amplitudes of the neighbouring traces. Performance of the proposed method is demonstrated on several synthetic seismic data examples as well as a field data set.

کلیدواژه‌ها [English]

  • Spatial aliasing
  • interpolation
  • time-space
  • local slope
  • predictive painting

مراجع

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فیزیک زمین و فضا
دوره 44، شماره 4
دی 1397
صفحه 73-85

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