Integrated study on the fracture system of Simsima Reservoir, Shah Field, Abu Dhabi, UAE

  • Khaled Ahmed Abdelsalam Radwan

Student thesis: Master's Thesis

Abstract

The study of rock fractures in the subsurface is always a multidisciplinary approach that requires the integration of different tools in order to understand the present fracture system. In this thesis we used different sources of data (core data, FMI interpretations, well logs, fracture attitude from wells and data from previous studies as well) to understand the fracture system at Simsima reservoir at Shah Field, onshore Abu Dhabi and to link it to the regional tectonic and structural setting of the UAE. On a regional scale, several studies indicate a counter clockwise rotation of the Arabian plate motion vector toward the Late Cretaceous and during the Paleocene to Middle Miocene times. Detailed mapping and kinematic analysis of fractures that were detected on core slabs, taken from vertical wells, reveals a rotation in the maximum compressive stress axis (σ1) through the different phases of deformation. The constructed static fracture model using Fracaflow 2010.2, reveals that fractures are found along two predominant trends N20-30 and N70-80. Taking into account that these fractures are open (conductive) they are formed as conjugate shear fractures that are bisected by the maximum stress axes (σ 1). Fracture intensity of the reservoir intervals (R1, R2, R3) across both flanks of Shah Field were investigated using data from cores of vertical wells and comparing it with the intensity data obtained from FMI interpretations of horizontal wells. The combined analysis indicates that R1 is the reservoir interval with the higher fracture intensity. Furthermore, density analysis has been done with Fracaflow 2010.2 to validate the results
Date of Award2012
Original languageAmerican English
SupervisorJorge Salgado Gomes (Supervisor)

Keywords

  • Earth sciences
  • Abu Dhabi
  • Fracture system
  • Simsima Reservoir - UAE
  • United Arab Emirates
  • Petroleum Geology
  • 0583:Petroleum Geology

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