Quantitative Well-Log Analysis of Gas Reservoirs at South Batra Field, Nile Delta, Egypt

Review Article

Austin J Earth Sci. 2014;1(1): 7.

Quantitative Well-Log Analysis of Gas Reservoirs at South Batra Field, Nile Delta, Egypt

Tharwat Abd El Hafeez1*, Hassan H El Kadi1 and El Geuoshi M2

Department Geology, Al-Azhar University, Cairo, Egypt

Department of Exploration, Mansoura Petroleum Company, Egypt

*Corresponding author: :Tharwat Abd El Hafeez, Department Geology, Al-Azhar University, Cairo, Egypt

Received: May 20, 2014; Accepted: August 25, 2014; Published: August 28, 2014

Abstract

The present research focuses on the quantitative interpretation of the well-logs of seven gas wells instead of located in the eastern part of South Batra field, Nile Delta Egypt at Latitude 31°2 & 31°9 N and Longitude 31°18& 31° 28 E. It aims to shed light on the hydrocarbon potentialities of the main Abu Madi Reservoirs (Abu Madi Level II and Abu Madi Level III). The petrophysical characteristics of the studied formations are thoroughly investigated to elucidate the hydrocarbon potentialities using (Interactive Petrophysics) software as well as a series of manual graphical and theoretical contributions. The petrophysical analysis was presented as: Litho saturation cross-plot to reflect the vertical variation of the petrophysical characteristics and, iso parametric maps to verify the lateral variation of petrophysical characteristics. The shale model shows that the dominant shale is mainly dispersed and laminated types. Distribution, which shows that the dominant shale are mainly dispersed and few laminated one. The integration of the reservoir characteristics and special core analyses of Abu Madi Formation indicate that, the most favorable places for hydrocarbon reservoirs occupy the eastern part for the Abu Madi Level II reservoir and in the middle of the southwestern part of the Abu Madi Level III reservoir in the study area.

Keywords: Interactive Petrophysics; Effective Porosity; Water Saturation and development activities

Introduction

In the last few decades gas has become the most energy source in the world. Because of the lower cost and cleanliness cost and cleanliness, the demands on it was remarkably increasing specially with the spread of frequent environmental hazards caused by the extensive use of regular energy sources. The Nile Delta seems gas prone, essentially methane, with a fair content of gas condensate [1]; few wells have produced oil and gas, it seems to still hide most of its gas potentiality [1,2]. Egypt is divided into three main petroleum provinces which are Gulf of Suez, Nile Delta and Western Desert, where the Nile Delta basin is the most prolific, prospective gas and condensate province in Egypt. The Nile Delta is the main gas producing province in the northern part of Egypt with approximately 62 TCF proven reserve [3]. The geology and the entrapment mechanism of the Nile Delta are still under discussion because the Delta does not have any outcrops of old rocks, where it is covered by the Holocene soils.

For decades there were limited drilling operations in the Nile Delta province if it compared with the other well-known producing deltas such as Niger and Mississippi deltas. The recent huge discoveries in the Nile Delta make it one of the most world known deltas. South Batra field is located northern of El Mansoura City in the Nile Delta of Egypt between latitudes 31°2 & 31°9 N and longitudes 31°18 & 31°28 E., Seven wells were selected to evaluate the reservoirs of the Miocene section (Abu Madi Formation) in the study area (Figure 1). The main objective of the present study is to achieve comprehensive evaluation of hydrocarbon reservoirs for selected wells in Abu Madi Formation at South Batra Gas Field in the study area. The quantitatively interpreted reservoir petrophysical parameters include the shale content, effective porosities, water and hydrocarbon saturations. Construction of the litho-saturation crossplots in addition to porosity and fluid saturation maps have been accomplished to clarify the vertical and lateral distribution of petrophysical parameters of the two reservoirs rock units (Abu Madi level II and Abu Madi Level III).