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Interpretation and mapping of a stratigraphic play using 3D seismic data and attributes in central Saudi Arabia

Abdallah A. Al-Zahrani and Fernando Neves
Petroleum Geoscience, 14, 245-251, 1 August 2008, https://doi.org/10.1144/1354-079308-770
Abdallah A. Al-Zahrani
1Saudi Aramco, Area Exploration Department, Dhahran, Saudi Arabia
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Fernando Neves
1Saudi Aramco, Area Exploration Department, Dhahran, Saudi Arabia
2Present address: Shell International E&P at Petroleum Development Oman, PO Box 81, Muscat, PC 113, Oman ()
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Abstract

Interpretation of three-dimensional (3D) seismic data from the northern part of central Saudi Arabia allowed mapping of the Permo-Carboniferous Unayzah Formation's aeolian sand deposits and fluvial channels. These types of depositional environments have been associated frequently with better reservoir-quality sandstones within Saudi Arabia. The depositional setting of the Unayzah reservoirs can be highly variable and range from glacial, to lacustrine, to meandering fluvial, to aeolian, to braided stream. Seismic amplitude data were instrumental in mapping a truncation of the upper Unayzah reservoir against the overlying Pre-Khuff Unconformity. The use of seismic attributes, such as coherence and curvature, indicated the existence of faulting and a fluvial channel network at the top of the Unayzah Formation. The integration of well and seismic amplitude data, via acoustic impedance inversion, revealed the direction of potentially higher porosity fairways within the channel system. The structural and depositional architecture depicted in this study is being appraised through drilling of an exploration well.

  • Unayzah
  • seismic stratigraphy
  • coherence attribute
  • well-tie
  • aeolian
  • curvature
  • 2008 EAGE/Geological Society of London
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Petroleum Geoscience: 14 (3)
Petroleum Geoscience
Volume 14, Issue 3
August 2008
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Interpretation and mapping of a stratigraphic play using 3D seismic data and attributes in central Saudi Arabia

Abdallah A. Al-Zahrani and Fernando Neves
Petroleum Geoscience, 14, 245-251, 1 August 2008, https://doi.org/10.1144/1354-079308-770
Abdallah A. Al-Zahrani
1Saudi Aramco, Area Exploration Department, Dhahran, Saudi Arabia
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
Fernando Neves
1Saudi Aramco, Area Exploration Department, Dhahran, Saudi Arabia
2Present address: Shell International E&P at Petroleum Development Oman, PO Box 81, Muscat, PC 113, Oman ()
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site

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Interpretation and mapping of a stratigraphic play using 3D seismic data and attributes in central Saudi Arabia

Abdallah A. Al-Zahrani and Fernando Neves
Petroleum Geoscience, 14, 245-251, 1 August 2008, https://doi.org/10.1144/1354-079308-770
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    • Abstract
    • INTRODUCTION
    • GEOLOGICAL BACKGROUND
    • SEISMIC DATA INTERPRETATION
    • CONCLUSIONS
    • Acknowledgements
    • References
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