Numerical Modelling of Coherent Broadband Pulses for Seismic Exploration

Abstract

As part of the Offshore Energy Environmental Research (OEER)/DRDC Atlantic project Feasibility of a Marine Vibroseis System to Minimize Potential Impacts of Seismic Surveying on Commercial Marine Invertebrates, DRDC Atlantic has been investigating the possibility and technical feasibility of using coherent broadband sources with complex waveforms (followed by matched-filtering) to replace high amplitude impulsive sources used in marine seismic surveys. This report discusses a MATLAB implementation of an acousto-elastic wavenumber algorithm for layered geoacoustic media. This code is then used to generate broadband time series for different geological configurations and incident waveforms. The relative performances of different impulsive and extended-time broadband sources are investigated. As well, the effects of the upper air/water interface and the inclusion of attenuations in the elastic layers are modelled.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2011
Accession Number
AD1000062

Entities

People

  • John Fawcett

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Guns
  • Amplitude
  • Attenuation
  • Bandwidth
  • Bessel Functions
  • Broadband
  • Classification
  • Computations
  • Coordinate Systems
  • Engineering
  • Filtration
  • Frequency
  • Frequency Bands
  • Losses
  • Models
  • Security
  • Transmission Loss

Readers

  • Acoustical Oceanography.
  • Seismology