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العنوان
Quantitative and qualitative pore pressure evaluation using well logging analysis and Drilling Exponent for Abu Roash Formation at Badr El Din-15 Field, Western Desert, Egypt /
المؤلف
Talaat, Ahmed Mostafa Mohammed.
هيئة الاعداد
باحث / أحمد مصطفى محمد طلعت
مشرف / عصام الس?د على
مشرف / احمد زكر?ا نوح
مشرف / محمود محمد غراب
الموضوع
Geology - Egypt.
تاريخ النشر
2024.
عدد الصفحات
88 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الجيولوجيا
تاريخ الإجازة
14/5/2024
مكان الإجازة
جامعة المنيا - كلية العلوم - الج?ولوج?ا
الفهرس
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Abstract

The aim of the study is making of a modern and good scenario for well drilling and economic return. As well as the provision of petroleum wells control for safe drilling and good economic return, it is necessary to know the pore pressure. So that it is possible to know the Optimal weight of drilling fluid and provide well control so that geological formations are not at risk of fracture for safe well drilling and good economic return.
The case study presented in the thesis focuses on the Bed-15 oil field, located in the North- Western region of the Abu Gharadig sedimentary basin within the Egyptian Western Desert. The Bed-15 field spans across latitudes 29° 45’ to 30 ° 05’ N and longitudes 27° 30’ to 28° 10’
E. and considered a component of the Badr El-Din Concession, which is situated approximately 300 km west of Cairo and around 100 km west of the Bed-1 location, the primary structural characteristics of the Abu Gharadig basin which consist of two half grabens that are divided by a ridge known as the ’Mid basin Arch’ oriented in a northeast-southwest direction.
Through well logging analysis studies, Bed 15-1, Bed 15-3, Bed 15-7, Bed 15-8 and Bed 15-9 wells were used, they contained gamma ray, neutron, density, shallow resistivity and deep resistivity data to calculate shale volume, total porosity, effective porosity, water saturation and hydrocarbon saturation and then make Litho-saturation Crossplot for the wells and Isoparametric maps for the reservoir which showed that the hydrocarbon saturation increases to the center of the studied area which was in the same direction in which the Shale volume decreases and effective porosity increases.
In pore pressure evaluation, Dxc and resistivity log were used estimate pore pressure, two pore pressure lithostratigraphic Crossplot were made and showed that the area is divided into different zones in which Abu Roach A is considered the seal in which it consist of impermeable shale and has a normal pressure zone while Abu Roach B is considered as a transition zone in which it consists of limestone, shale and sandstone intercalation and has slight increase in pore pressure and finally Abu Roach C which is our reservoir where the pore pressure increase suddenly. Also, two pore pressure distribution maps were made (using drilling exponent and using Eaton’s resistivity), they showed that pore pressure increases towards the center of the studied area and decrease outward.
A comparison between hydrocarbon saturation, pore pressure distribution map with geologic structure were made and it showed that they have proportional relationship.