DEVELOPMENT OF “DELTAGRAV” SOFTWARE FOR GENERATING TIME-LAPSE MICROGRAVITY ANOMALY MAPS FOR OIL AND NATURAL GAS RESERVOIRS

• Main Author: Johanes
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/79587
• Institution: Institut Teknologi Bandung

Processing time-lapse microgravity data often presents challenges, particularly regarding data processing duration. This research aims to address these challenges by developing DeltaGrav software, equipped with correction features for timelapse microgravity data processing and contour map generation, all integrated each other in a single MATLAB environment. The software is developed in the MATLAB environment, specifically requiring MATLAB version R2021a, and includes modules supporting gravity data processing. DeltaGrav is designed to streamline and expedite the time-lapse microgravity data processing, enabling users to obtain optimal quality time-lapse microgravity anomaly maps. This program is equipped with a feature for correcting changes in groundwater level, under the assumption that this correction can be used as an approximation of an infinite plane for the groundwater level in the research field area, which tends to be wide and flat. DeltaGrav includes features for calculating time-lapse microgravity anomalies, conducting Complete Bouguer Anomaly (CBA) calculations for each measurement period in time-lapse microgravity data processing, and visualizing contour maps using MATLAB's contouring method or the Inverse Distance Weighted method. The results of this research demonstrate that DeltaGrav simplifies the steps involved in time-lapse microgravity data processing, providing anomaly map results that describe changes in variables below the earth's surface. The user interface of DeltaGrav is designed for userfriendly navigation. Furthermore, the software aids geological analysis based on time-lapse microgravity anomaly responses. However, testing has revealed some limitations of DeltaGrav, including inflexibility in data format, and DeltaGrav is not a standalone program, requiring MATLAB to be installed and serve as its primary environment.