GEOPHYSICS LETTERS

Geophys. Lett., 1 (2008) 53 .80SEISMIC STUDY TO RECOGNIZE REEFRESERvoms IN RAS GHARIB, SHOAB GHARIBAND RAS FANAR OIL FIELDS,GULF OF SUEZ, EGYPTGhalib M.*; Nadia F.*, and Farrag Kh.* Cairo University, Faculty of Science Egypt,Geophysics DepartmentABSTRACTThe present study is concentrated on the Middle MioceneNullipore rock (taken as example in the present study for thecarbonate build-up or reefs) of Belayim formation in RasGharib, Shoab Gharib, and Ras Fanar oil fields, Gulf of SuezEgypt. The study is an attempt to concern on the study ofcriteria or geophysical parameters, by which we can recognizeand interpret the carbonate build-ups (reefs), using seismicdata. Seismk: parameters derived from well log data such asseismic velocity and acoustic impedance, and density are plottedversus depth and used to interpret the lithology of HammamFaraun section as carbonate (which may be reefs), bycomparing the response of the Hammam Faraun section tothese parameters, which is moderate response, with theoverlying high response representing anhydrite and theunderlying low response representing shale. By tying theseplotted parameters to the seismic section, we can delineate theHammam Faraun seismic sequence on the sections. Seismiccriteria such as outline reflection, seismic facies change, drapeand velocity anomaly can be used to interpret Hammam Faraunseismic sequence. By conjunction between these two subjects,we can interpret the Hammam Faraun seismic sequence ascarbonate build-up (reefs). Shallow marine environment ispredicted to the main parts of the Hammam Faraun seismicsequence. According to seismic reflection configurations, theintervals on the Hammam Faraun seismic sequence, whichrepresent chaotic or seismic free to amplitude anomaly, isi~terpreted as high energy intervals on the sequence, and also