Geophysical Study on some Salt Dome Structures in the Southern Part of the Gulf of Suez, Egypt"
Camellia Saber Mahran Moftah Mahran;
Abstract
The area under study lies in the southern part of the Gulf of Suez, Egypt. Integrated geophysical study has been carried out in the study area for estimating and recognizing the geological features, especially Salt Dome Structures and fault element trends, then focusing our study on Hilal Oil Field which lies between latitudes 27 º 46' N and 27 º 51' N and longitudes33 º 42 ' E and 33 º 47 ' E.
This work is concerned in the interpretation of gravity anomalies in the southern part of the Gulf of Suez to detect the major predominant trend of the regional structural features.
In addition, petrophysical properties and subsurface structural geological features using formation evaluation of well logs and seismic reflection data interpretation, respectively, at Hilal Oil Field have been achieving. The formation evaluation involves measurements and corrections of the fluid resistivity, rock resistivity, shale content, porosity values and fluid saturations. Where, different quantitative interpretation steps that had performed by using the computer technique and a number of distribution and saturation maps (porosity, shale content, water and net pay of hydrocarbon saturation) as well as, the Litho-saturation crossplots was constructed to show the horizontal and vertical distribution of the hydrocarbon occurrences in the study area.
Conventional seismic data interpretation was very difficult for estimation of the subsurface geological features due to the complex geology of the Gulf of Suez that is arising from the broken rock blocks with different types of faults. That is why unconventional seismic interpretation (seismic attributes) has been used for solving this complexity and it was very useful approach.
Different types of seismic attributes such as Dip of Maximum Similarity, Smoothed Dip of Maximum Similarity, Trace Envelope, Wavelet Envelope,Similarity, Similarity Variance, Dip Variance, Instantaneous Lateral Continuity, Event Continuity … etc., have helped us to detect the reflection horizons and the normal faults within the salt border. Event Continuity and Instantaneous Phase attribute were the best in subsalt layers detection.
All the previous studies, structures, well-logs analysis and seismic structural interpretation were tied together to get a complete understanding of the hydrocarbon potentiality in the area under study.
Key words:
Gulf of Suez, Hilal oil field, Salt domes, Gravity, Well logging analysis, seismic attributes, subsalt detecting.
This work is concerned in the interpretation of gravity anomalies in the southern part of the Gulf of Suez to detect the major predominant trend of the regional structural features.
In addition, petrophysical properties and subsurface structural geological features using formation evaluation of well logs and seismic reflection data interpretation, respectively, at Hilal Oil Field have been achieving. The formation evaluation involves measurements and corrections of the fluid resistivity, rock resistivity, shale content, porosity values and fluid saturations. Where, different quantitative interpretation steps that had performed by using the computer technique and a number of distribution and saturation maps (porosity, shale content, water and net pay of hydrocarbon saturation) as well as, the Litho-saturation crossplots was constructed to show the horizontal and vertical distribution of the hydrocarbon occurrences in the study area.
Conventional seismic data interpretation was very difficult for estimation of the subsurface geological features due to the complex geology of the Gulf of Suez that is arising from the broken rock blocks with different types of faults. That is why unconventional seismic interpretation (seismic attributes) has been used for solving this complexity and it was very useful approach.
Different types of seismic attributes such as Dip of Maximum Similarity, Smoothed Dip of Maximum Similarity, Trace Envelope, Wavelet Envelope,Similarity, Similarity Variance, Dip Variance, Instantaneous Lateral Continuity, Event Continuity … etc., have helped us to detect the reflection horizons and the normal faults within the salt border. Event Continuity and Instantaneous Phase attribute were the best in subsalt layers detection.
All the previous studies, structures, well-logs analysis and seismic structural interpretation were tied together to get a complete understanding of the hydrocarbon potentiality in the area under study.
Key words:
Gulf of Suez, Hilal oil field, Salt domes, Gravity, Well logging analysis, seismic attributes, subsalt detecting.
Other data
| Title | Geophysical Study on some Salt Dome Structures in the Southern Part of the Gulf of Suez, Egypt" | Other Titles | The area under study lies in the southern part of the Gulf of Suez, Egypt. Integrated geophysical study has been carried out in the study area for estimating and recognizing the geological features, especially Salt Dome Structures and fault element trends, then focusing our study on Hilal Oil Field which lies between latitudes 27 º 46' N and 27 º 51' N and longitudes33 º 42 ' E and 33 º 47 ' E. This work is concerned in the interpretation of gravity anomalies in the southern part of the Gulf of Suez to detect the major predominant trend of the regional structural features. In addition, petrophysical properties and subsurface structural geological features using formation evaluation of well logs and seismic reflection data interpretation, respectively, at Hilal Oil Field have been achieving. The formation evaluation involves measurements and corrections of the fluid resistivity, rock resistivity, shale content, porosity values and fluid saturations. Where, different quantitative interpretation steps that had performed by using the computer technique and a number of distribution and saturation maps (porosity, shale content, water and net pay of hydrocarbon saturation) as well as, the Litho-saturation crossplots was constructed to show the horizontal and vertical distribution of the hydrocarbon occurrences in the study area. Conventional seismic data interpretation was very difficult for estimation of the subsurface geological features due to the complex geology of the Gulf of Suez that is arising from the broken rock blocks with different types of faults. That is why unconventional seismic interpretation (seismic attributes) has been used for solving this complexity and it was very useful approach. Different types of seismic attributes such as Dip of Maximum Similarity, Smoothed Dip of Maximum Similarity, Trace Envelope, Wavelet Envelope,Similarity, Similarity Variance, Dip Variance, Instantaneous Lateral Continuity, Event Continuity … etc., have helped us to detect the reflection horizons and the normal faults within the salt border. Event Continuity and Instantaneous Phase attribute were the best in subsalt layers detection. All the previous studies, structures, well-logs analysis and seismic structural interpretation were tied together to get a complete understanding of the hydrocarbon potentiality in the area under study. Key words: Gulf of Suez, Hilal oil field, Salt domes, Gravity, Well logging analysis, seismic attributes, subsalt detecting. | Authors | Camellia Saber Mahran Moftah Mahran | Issue Date | 2016 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| G13252.pdf | 923.03 kB | Adobe PDF | View/Open |
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