Use of spectral decomposition attribute in detecting channels in Taranaki Basin, New Zealand

Joseph Gnapragasan, Umar Hamzah, Abdul Rahim Samsudin

Research output: Contribution to journalArticle

Abstract

Alluvial deposit is considered to be one of the biggest hosts of the petroleum entrapment and also for many nonrenewable resources. Several methods have been introduced to track and delineate the alluvial deposits that show geological features of channels, point bars, flood plains, and crevasse play and so on. The purpose of this paper is to discuss on how spectral decomposition method could be used to enhance geological features of the Taranaki basin emphasizing on stacking channels that widely seen most part of the area. With the introduction of complex traces in early 1970, more seismic attributes have been created and used by seismic interpreters to get better results in interpreting the subtle features of the subsurface. One of the attribute that widely used nowadays is spectral decomposition which was created simply by changing the time seismic into frequency domain using Fourier analysis that cross correlate between predefined sinus and cosines frequencies. Each channel in the survey area stand up more clearly within a specific frequency range where thicker channels shows higher amplitude reading at lower frequency and the thinner layer shows higher amplitude reading at higher frequency. Application of spectral decomposition also helps in determining the channels which were deposited within the incised valleys and helps in recognizing the orientation as well the relative thickness of each channel.

Original languageEnglish
Pages (from-to)8144-8149
Number of pages6
JournalARPN Journal of Engineering and Applied Sciences
Volume11
Issue number13
Publication statusPublished - 2016

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Decomposition
Deposits
Fourier analysis
Crude oil

Keywords

  • Channels
  • Spectral decomposition
  • Wavelets

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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