Quick Links


Residual and Commercial Gas Discrimination by Spectral Decomposition Using Ultra-Far Stacked Seismic Data, Nile Delta, EgyptNormal access

Authors: W. Fathy and A. Shams
Event name: Second EAGE Eastern Mediterranean Workshop
Session: Exploration Opportunities I
Publication date: 20 November 2019
DOI: 10.3997/2214-4609.201903158
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 5.16Mb )
Price: € 20

One of the big challenges facing operators in the on-shore Nile Delta is the discrimination between residual gas saturations and mobile commercial gas. The application of spectral decomposition and frequency attributes on pre-stack seismic data has opened the door to think about the relationship between frequency attenuation and reservoir properties. The main motivation of this study is the existence of a potential accumulation, with a very good seismic response, extremely comparable to that observed in a major producing field nearby. The results of a well drilled in this prospect were not encouraging and the well was classified as a dry well with gas shows (gas saturation in the tested reservoir reached 28%). We will see in this study how spectral decomposition can be used to discriminate between low gas saturations and mobile, commercial gas in the area of study.

Back to the article list