ANALYSIS OF THE EFFECT OF BOTTOM IMBIBITION WATER SATURATION ON EFFECTIVE ELASTIC MODULUS OF BEREA SAND STONE AND POROUS ROCK MODELS

• Main Author: Mahardika Renaldi, M
• Format: Final Project
• Language: Indonesia
• Subjects: Fisika
• Online Access: https://digilib.itb.ac.id/gdl/view/41719
• Institution: Institut Teknologi Bandung

Understanding of the physical properties of rocks is very important in exploration geophysics, especially in interpreting data such as mapping the location of hydrocarbon reserves. The exploration then challenged physicists and technicians to better understand the properties of rocks below the subsurface. One of the important things to do is to study the elastic properties of rocks which can be analyzed with the help of wave propagation in rocks. In this study, the calculation of the elastic properties of rocks was carried out on various water saturation and confining pressures. The water saturation and pressure variation were also applied to the calculation of the velocity of P-waves and S-waves using numerical modeling. Furthermore, the numerical method that the author used in this study to calculate the elastic properties of rocks, is the finite element method developed by Garboczi (1998). The results of data processing on the Berea sandstone image and the porous rock image model state that the water saturation value is directly proportional to the effective Bulk modulus but does not affect the effective shear modulus. Then the higher the water saturation value of the rock sample, the higher the primary wave velocity, but this does not occur at the secondary wave velocity. In addition, the increase in confining pressure received by rock samples will make the Bulk modulus and shear effectively increase at the same saturation degree, which is followed by an increase in the value of the primary and secondary wave velocity.