USE OF WELL-LOGS FOR PETROPHYSICAL EVALUATION OF ABU MADI RESERVOIR IN ABU MADI - EL-QARA - NIDOCO AREA, NORTHERN NILE DELTA, EGYPT

Document Type : Original Article

Authors

1 Geology Department, Faculty of Science, Zagazig University, Egypt

2 Consultant Geophysicist.

Abstract

The objective of the present study is to evaluate the reservoir characteristics of the Late Miocene Abu Madi Formation (Abu Madi Levels II and III) at Abu Madi-El-Qara-Nidoco area, northern Nile Delta, Egypt. The study area is located between Longitude 31° 13` 48`` -31° 24` 36``E and Latitude 31° 21` 36``- 31° 37` 12`` N. Open-hole wireline log data of seven wells are used in this study. The petrophysical characteristics of the studied formation are thoroughly investigated to elucidate its hydrocarbon potentialities. The vertical variation of the petrophysical characteristics is presented as Lithosaturation cross-plots. The parameters distribution maps (shale volume, porosity, fluid saturation, net pay thickness and hydrocarbon saturation) are constructed to represent the lateral variation of petrophysical characteristics. The shale model shows that the dominant shale is mainly of dispersed and laminated types. The constructed neutron-bulk density, neutron-sonic and M-N crossplots display that the main reservoir lithology is sandstone intercalated mainly with dispersed shale and minor laminated shale in Level III and dispersed to laminated shale in Level II. It is also shown that Abu Madi Formation has poor to very good porosities range from 0.03 to 0.22 for Level II and from 0.06 to 0.19 for Level III. The most favorable places for hydrocarbon reservoirs occupy southwestern part for Abu Madi Level II reservoir and in the middle, the middle-west, the middle-east and the southeastern parts for Abu Madi Level III reservoir.

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