CONTRIBUTION OF THE ACOUSTIC IMPEDANCES AND PETROPHYSICAL PARAMETERS TO LITHOLOGY AND FLUID DISCRIMINATION IN OFF-SHORE DEPOSITS, WEST NILE DELTA, EGYPT

Document Type : Original Article

Authors

Faculty of Science, Cairo University, Egypt.

Abstract

The discrimination of lithologic and fluid contents has been achieved by cross plotting the log data of two wells encountered in a channel located, off-shore West Nile Delta, Egypt. Cross plotting the log data of the two wells A and B, on the same plot, helped in comparing the properties of the reservoir at different well locations. This has been successfully achieved using depth, Gamma-ray, and P- and S- impedances data. Moreover, the same cross plots were used individually for each well using the Gamma-ray, Resistivity and Density logs as the color code. Logs of well A shows that the reservoir is characterized by clean and blocky sands, fully saturated with gas; while well B is characterized by sands inter-bedded with shale, and filled with residual gas and water. When appropriate pairs of attributes are cross-plotted, the common lithologies and fluid types can be discriminated and provide a straightforward interpretation

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