This paper describes a well-based analysis program, written in the C programming language, called " Quantitative Petrophysical and Seismic Evaluation Technique" (QPSET). The program is designed to accomplish the evaluation of reservoir parameters in shaly-sand sedimentary sections in marginal hydrocarbon zones. The program flow is designed to complete an analysis in a single pass and uses two modified approaches for the evaluation of water saturation and acoustic impedance. Output values are stored in ASCII format and are therefore available for plotting in any graphic software package. Either the user selects the precise analysis algorithms employed, or they may be restricted by the data available. This paper reports results obtained using the program on data from seven wells located in the northern portion of the Gulf of Suez Rift Basin, spanning the Lower Middle Miocene Rudeis sedimentary section. (Rudeis thickness ranges from 500 ft. to 5000 ft. within the basin.) The program has successfully characterized the essential features of the Rudeis and permits some speculation as to the depositional environment for the sediments and the tectonic setting of the basin at the present day. In this latter regard, it is stressed that other information is required before adequate interpretations can be established.

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