DETERMINATION OF EFFECTIVE FRACTURE USING NUMERICAL APPROACH

• Main Author: Steven Wattimury, Petra
• Format: Theses
• Language: Indonesia
• Subjects: Pertambangan dan operasi berkaitan
• Online Access: https://digilib.itb.ac.id/gdl/view/62385
• Institution: Institut Teknologi Bandung

The naturally fracture reservoir system is a complex system consisting of irregular fractures, vugs, and matrices. The fractures connected with a higher permeability compared to the matrix. The complexity of the matrix-fracture system is a challenge in modeling process for the naturally fractured reservoir. With the concept of dual-porosity model that was developed by Warren and Root (1963), the idealization of the actual condition of the matrix-fracture system can be modeled. The interaction between the matrix-fracture becomes a very important factor and is influenced by the system geometry known as the shape factor. Matrix geometry, fracture spacing, matrix size, fluid transfer process, fracture (pressure and temperature) conditions are important parameters that need to be considered in determining the shape factor. The commercial reservoir simulators used are still limited to accomodate the heterogeneity and complexity of the matrix-fracture system. The matrix-fracture system tends to be idealized to simplify the calculation and simulation process. Shape Factor values which used in simulator also tend to be constant and without clear boundary conditions. The single porosity model has been proven to be used to calculate the shape factor values and become a reference in improving the performance of the dual porosity model. With combination of numerical approach through fracture geometry changes, the dual porosity model which used in the simulator can produce the the same performance as that shown in the single porosity model, and consistent with various reservoir parameters sensitivity study and boundary conditions.