5586
Emad Ashour Abd El Aziz Ahmed
Seismic And Petrophysical Analysis For Detecting Hydrocarbon Occurrences Of The Fractured Dolomite Reservoir In Issaran Field, Western Shore Of The Gulf Of Suez, Egypt
Seismic, Petrophysical , Fractured Dolomite, Issaran Field, GulfSuez, depositional environment
This thesis deals with the subsurface geology, depositional environment, diagenetic processes, formation evaluation of the well logs and core analysis, investigation of the Issaran Field, western shore of the Gulf of Suez area, Egypt to evaluate the reservoir characteristics of the upper and lower dolomite reservoirs (middle Miocene) in this area. The subsurface geological investigations comprise the study of the stratigraphy of the field area, the outlining of the regional structural deformations and the tectonic implications in this area. Such study is based on constructing different isopach maps for the different stratigraphic units, panel diagrams, structural contour maps on the different rock unit tops and interpretation of different seismic sections. The depositional environment and identification of clay minerals were estimated by using the natural gamma ray spectrometry (NGS), X-Ray diffraction (XRD) and petrographical analysis. The diagenetic processes of the studied rocks samples were also attempted from the thin sections investigation. A comprehensive interpretation of the available logs by means of a computer program (Interactive Petrophysics Ver. 3.6) was carried out. This program was prepared to perform quantitative estimations of reservoirs in subsurface sequence by using well-log techniques. Log editing and environmental corrections were applied for the log readings. The input data include: depth, RHOB, NPHI, BHC, FMI, Pe, LLd, LLS, MSFL, GR, SGR and Caliper log. The output data comprises: depth, Vsh, Øeff., Øsec. ,Sw, Sh and net pay. The aim of this part is to obtain the average parameters of each of the studied reservoirs. Moreover, the combination of both formation micro imaging tools (FMI) and conventional well log data have been used together to evaluate the vugs, dissolution channels, induced and natural fractures within the studied dolomite reservoirs. The laboratory measurements of core samples include the determination of petrophysical properties such as: bulk density (ρb), grain density (ρg), effective porosity (Øeff.), horizontal permeability (Kh), vertical permeability (Kv), formation resistivity factor (F.F.), hydrocarbon saturation (Sh) and water saturation (Sw). The aim of this part is to define the petrophysical characteristics of the studied reservoirs and to make a comparison between the analytically determined parameters and those derived from wire-line logs.
2019
Ph.d
Al-Azhar
Science