EnKF (ENSEMBLE KALMAN FILTER) PERMEABILITY USINGGAVER-STEHFESTONCASE RESERVOIRCONSTANT PRESSURE PRODUCTION : CONSTANT PRESSURE OUTER BOUNDARY

• Main Author: PRARAMA DWIHAR (NIM : 10107077); Pembimbing : Prof. Dr. Sutawanir Darwis), YANSI
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17615
• Institution: Institut Teknologi Bandung

Simulation model can describes the flow of oil, gas, and water in reservoir. Simulation process needs to estimate some parameters that describes the flow of oil in that <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> reservoir.As one of reservoir’s parameter who describes the flow rate, permeability is updated by EnKF (Ensemble Kalman Filter) method. EnKF uses solution of diffusivity equation trough non-linier transformation. That solution can be solved by analytic or numeric. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> In this final project, diffusivity equation solution that is outcome from inverse Laplace is solved numericly with Gaver Stehfest method. Case for reservoir: constant pressure <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> production, constant pressure outer boundary. Updating data between analytic and numeric solution will be compared by statistic descriptive and represent data that almost same.