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    Potential Field Data Guided Seismic Forward Modelling of Basement Structures: a Case Study from Offshore Nile Delta Basin

    Access Status
    Fulltext not available
    Authors
    Hanafy, S.
    Mehmoud, Sharaf Elden
    Nimmagadda, Shastri L.
    Date
    2016
    Type
    Conference Paper
    
    Metadata
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    Citation
    Hanafy, S. and Mehmoud, S.E. and Nimmagadda, S.L. 2016. Potential Field Data Guided Seismic Forward Modelling of Basement Structures: a Case Study from Offshore Nile Delta Basin. In: ASEG-PESA-AIG 2016 25th International Geophysical Conference and Exhibition: Interpreting the Past, Discovering the Future. 21-24 Aug 2016, Adelaide, Australia.
    Source Title
    ASEG, PESA AND AIG
    DOI
    10.1071/ASEG2016ab136
    Faculty
    Faculty of Business and Law
    School
    School of Management
    URI
    http://hdl.handle.net/20.500.11937/81369
    Collection
    • Curtin Research Publications
    Abstract

    The offshore Nile Delta region has huge exploration potential, keeping in view the existing commercial oil and gas fields in and around this basin. The majority of the offshore Nile Delta basin is underexplored. Sparsity of geophysical data coverage and ambiguity in the interpretation of existing geophysical data have held back the exploration for many decades. In order to assess and evaluate the exploration potential, it is important to estimate the depth to the basement, the nature of basement and its topography. Identifying the basement reflector based on the current seismic data is challenging, because of limitations of the resolution and record length of the seismic data. Moreover, an estimation of sedimentary column is paramount for further detailed geological and geophysical investigations. The objective of the research is to perform seismic forward modelling of the basement reflector, guided by gravity and magnetic field data, and minimize the ambiguity involved in a single geophysical method of interpretation. The geophysical properties and their contrasts derived from seismic, gravity and magnetic methods of exploration are various criteria used in the integration and modelling process. Seismic stacking velocity data and depth values interpreted from gravity and magnetic field data are used in the modelling process. The uncertainty in modelling the basement character is assessed based on the stacking velocities and seismo-geological cross-sections interpreted from 2D seismic data, instead of cross-sections obtained from unreliable seismically derived depth data. The analysis of errors observed in the seismic data due to younger layer-cake reflections interfering with the basement reflector are analysed and the observed errors in the velocity models are accordingly reconciled based on the potential field data. The potential field data interpretation guiding the seismic forward modelling facilitates the redesign process of seismic data acquisition and processing in the hugely unexplored offshore Nile Delta basin in Egypt.

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    • Potential Field Data Guided Seismic Forward Modelling of Basement Structures: a Case Study from Offshore Nile Delta Basin
      Nimmagadda, Shastri (2016)
      SUMMARY The offshore Nile Delta region has huge exploration potential, keeping in view the existing commercial oil and gas fields in and around this basin. The majority of the offshore Nile Delta basin is underexplored. ...
    • New insights on interpretation of seismic attributes in Nile-Delta basins for analyzing Pliocene geological characteristics
      Hanafy, Said; Nimmagadda, Shastri ; Mahmoud, S.E.; Hemdan, Khaled; Farhood, Khamis; Mabrouk, W.M. (2014)
      Northern parts of Nile Delta is largely unexplored because of variety of constraints and other exploration priorities. Exploration and production (E & D) in these areas are challenging tasks,where water ...
    • New insights on structure and stratigraphic interpretation for assessing the hydrocarbon potentiality of the offshore Nile Delta basin, Egypt
      Hanafy, S.; Nimmagadda, Shastri ; Mahmoud, S.; M Mabrouk, W. (2017)
      The study area lies around the petroleum provinces of the Egyptian Offshore Nile Delta basin. The existing exploration data are sparse, and any effort made on the strati-structural interpretation is challenging for ...
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