RESERVOIR CHARACTERIZATION OF SANDSTONE RESERVOIRS, KHATATBA FORMATION, IN TUT OIL FIELD, WESTERN DESERT, EGYPT

Abstract

TUT Field is located in Shushan Basin and a part of Khalda petroleum company concessions, is one of the most prolific fields in the northern part of the Egyptian Western Desert. It lies between latitudes 30° 44' 15'' – 30° 46' 03'' N and longitudes 26° 57' 18''- 27° 00' E.

The presence of huge subsurface sedimentary section which includes considerable reservoir rocks within the Jurassic Khatatba (Safa) Formation, attracts the attention of petroleum companies for oil and gas investigation and exploration. Lithostratigraphically, the TUT field in Shushan Basin comprises rock units, ranging from Middle Jurassic to Miocene. The Middle Jurassic Khatatba (Safa) Formation which divided into Upper and Lower Safa Members is composed mainly of sandstone interbedded with shales, siltstone and coal streaks. Upper and Lower Safa Members in TUT Field can be subdivided vertically into three main reservoirs. The shallower reservoirs: Khatatba (Upper Safa-Top and Upper Safa-Bottom). The deeper reservoir: Khatatba (Lower Safa-Top). The present study deals with the evaluation of structural frame work to delineate the geometry, and characteristics of the Upper and Lower Safa Members reservoirs, using the available 2D seismic reflection data, and to determine the different reservoir parameters, characterizing the pay zone utilizing well data. And to evaluate the environment of deposition by the analysis of the lithofacies and the spectral gamma ray types. In addition to, the other available data to spotlighting the promising locations for further exploration.