RESERVOIR CHARACTERIZATION OF QAWASIM FORMATION IN BALSAM FIELD, ONSHORE EAST NILE DELTA, EGYPT

Document Type : Original Article

Authors

1 El Wastani Petroleum Company, Exploration Department

2 Faculty of Science, Ain Shams University

Abstract

Balsam Field is the most significant discovery in Qawasim Formation. The geological geophysicsal data interpretation reveals complicated horst block structure which is heavily faulted with north-south trending lineaments, the bright amplitude shows some correspondence to the reservoir extent and thickness, Qawasim Formation is divided into two units (Qawasim-I and Qawasim-II). The open-hole logs were good enough for proper formation evaluation. A Petrophysical work was done by calculating shale volume using single indicator (GR). Lithology determination was determined by using Mud-log description, cross plots for lithology indicators as density Vs porosity which indicates calcareous to highly calcareous sandstone especially on the top part of Qawasim-II pay. Vp/Vs crossplot was used to differentiate between different lithologies and fluid content (wet and gas sandstone and clay). The petrophysical evaluation proved 58 meters net pay in Qawasim Formation