The Interrelation between VpVs ratio, Acoustic Impedance and Gradient Impedance for Reservoir Characterization, Offshore East Nile Delta, Egypt.

Document Type : Original Article

Author

Faculty of Science - Cairo University

Abstract

Discriminating between different lithology and pore fluid is an essential phase in reservoir characterization. Crossplot technique is an important step in rockphysics analysis and in investigating the relationship between various elastic parameters. Studying the interrelation between VpVs ratio, acoustic impedance (AI) and gradient impedance can easily provide straightforward interpretation for gas detection, since the lithology and pore fluids have major effect on the reservoir analysis. This was successfully achieved at Pliocene gas reservoir situated at offshore East Nile Delta, Egypt. AI-VpVs ratio crossplot helped in grouping different lithology and pore fluid, where gas sand will cluster at low values within the crossplot. Therefore, Similar physical properties will group within the same cluster and hence different lithology and pore fluids will be discriminated. Moreover, AI versus gradient impedance could also differentiate between gas sand and shale. The gas sand will deviate from the background trend. Eventually, Rockphysics templates will help in providing information about the properties of the reservoir rather than normal well log interpretation.

Keywords

Main Subjects

Files

History

  • Receive Date: 16 June 2025
  • Revise Date: 05 July 2025
  • Accept Date: 20 July 2025

Share

How to cite

Statistics