DETERMINATION OF ALTERNATIVE METHODOLOGY FOR ROCK TYPING WITH ELASTIC PARAMETERS BASED ON EMPIRICAL EQUATIONS FROM ROCK PHYSICS.

• Main Author: Maimunah Lubis, Mentari
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/63285
• Institution: Institut Teknologi Bandung

There are many variables and methods used to determine reservoir quality, including permeability and porosity. However, these two variables were obtained through Special Core Analysis (SCAL). In this study, the author tries to find variables and methods that can be used in determining reservoir quality without data of permeability and porosity, so SCAL can be neglected. Velocity and density variables were chosen to be the focus of this study as these variables can be obtained directly from drilling activities in the field. From the results of the research and analysis conducted, it can be concluded that the velocity and density correlation, through its relationship with the Lame constant, can be used in rock typing based on reservoir quality. The gradient from the cross-plot results becomes a reference in seeing the sensitivity of the relationship between variables. A cross-plot was also carried out using the previously commonly used methods such as Pore Geometry Structure, modulus values, and critical porosity to support the interpretation of the cross-plot between Lame constant variables. With the trend of data distribution patterns being relatively the same, the authors can believe that determining reservoir quality using velocity and density variables is feasible. The feasibility test is also carried out through the coefficient of determination from the results of the cross-plot itself. This research is expected to contribute to the field of Geophysical Engineering in finding and determining reservoirs that have good quality and potential so as to optimize natural resource management activities, especially those related to oil and gas exploration.