Amplitude Variation with offset application history in middle east and North African basins

Mohammed Farfour, Abdullatif Al-Shuhail, Said Gaci, Mahmoud Abd El-Gelil

Research output: Contribution to journalArticle

Abstract

The assumption behind Amplitude Variation with Offset (AVO) concept is that amplitude changes (either decrease or increase) with offset can be related to rock physical properties and pore-fluid content. The technique has been widely deployed in the Gulf of Mexico, and has proved to be an excellent indicator of hydrocarbons and lithology. Over the past 40 years, several studies have shown that AVO responses of gas sands differ by geologic setting. These responses have been observed in many locations around the globe, some in basins similar to the Mexican Gulf such as the North Sea, South Canada, but others are in different geological settings than the Gulf setting. In this study we review some examples from North African and Middle Eastern basins. We discuss the occurrence of AVO anomalies and the successful application of the technique for detecting and delineating hydrocarbon reservoirs. Furthermore, we illustrate case studies where the technique was used for carbonate and naturally fractured reservoirs exploration and characterization. The case histories illustrated in the study demonstrate that AVO technique is applicable in different geological settings and environments including old and deep sand reservoirs in North Africa and the Middle East. Once calibrated to the local geology, AVO can perform well even in geological conditions that differ from the Gulf of Mexico where the technique was first developed and successfully implemented.

Original languageEnglish
Pages (from-to)301-318
Number of pages18
JournalJournal of Seismic Exploration
Volume27
Issue number4
Publication statusPublished - Aug 1 2018

Fingerprint

Middle East
Hydrocarbons
Sand
histories
Lithology
Carbonates
Geology
history
basin
Gulf of Mexico
Physical properties
gulfs
Gases
Rocks
sands
Fluids
hydrocarbons
case histories
North Sea
globes

Keywords

  • Avo anomaly
  • Gulf of Mexico
  • Hydrocarbons reservoir
  • Middle East
  • North Africa

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Amplitude Variation with offset application history in middle east and North African basins. / Farfour, Mohammed; Al-Shuhail, Abdullatif; Gaci, Said; El-Gelil, Mahmoud Abd.

In: Journal of Seismic Exploration, Vol. 27, No. 4, 01.08.2018, p. 301-318.

Research output: Contribution to journalArticle

Farfour, Mohammed ; Al-Shuhail, Abdullatif ; Gaci, Said ; El-Gelil, Mahmoud Abd. / Amplitude Variation with offset application history in middle east and North African basins. In: Journal of Seismic Exploration. 2018 ; Vol. 27, No. 4. pp. 301-318.
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