#TITLE_ALTERNATIVE#

• Main Author: KRISTIAN (NIM : 12214050), WILLY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31622
• Institution: Institut Teknologi Bandung

Production allocation for remaining reserve determination is a common method in reserves assessment. Nevertheless, the remaining reserve determination is only estimated whether in field scale or in sand zone / <br /> <br /> reservoir zone scale. Certainly a more accurate and comprehensive data-information is needed. Therefore, author performs a production allocation determination and remaining reserves mapping in reservoir zone basis of each wells, to determine which zones are relatively prospective for future development and also which zones are not prospective for an exploitation. Moreover, an investigation is done on the relation between Darcy Equation (k.h method) in determining Productivity Index which commonly used in lectures and Productivity Index based on swab data that is commonly used as references in oil industry. <br /> <br /> Remaining reserve determination based on reservoir performance per well is done on 44 oil wells in Urban Field, with 10 target of reservoir zones. The input parameters are related one another, indicating a necessarily acceptable and reliable result. There are also several important assumptions used such as usage of Voronoi Map in determining drainage area, the neglect of well interferences, and also pressure distributions, to complement the data needed. For non-available swab test data, correlation between Darcy Productivity Index and Swab-data Productivity Index will be used to create dummy swab test data to complete the swab test data for determining allocation factor. From obtained allocation factor, production allocation on each reservoir zone is determined to create cumulative production distribution and cumulative production map based on reservoir zones. Estimated remaining oil in place and remaining reserves are then resoluted by using two methods, based on static equation (cumulative production and original oil in place), and based on historical specified zone production decline curve analysis. From study related to correlation between Darcy Productivity Index and Swab-data Productivity Index in Urban Field, it is found that there are still many constraints in correlating the Darcy Productivity Index and Swab-data Productivity Index. Nevertheless, the obtained correlation between Darcy and Swab data are used as a parameter input in determining dummy swab data for mature wells, as well as a guidance in Darcy-Swab correlation determination for other fields in Chevron. Eventually, from the calculation obtained, it is seen that current production of Urban Field reaches the amount of 32.62 million of barrels oil with obtained production allocation value of oil on each 10 reservoir zones. The outcome of this study is expected to assist and to become a reference for Chevron industry related to deciding future plan for the existing wells, as well as possibility in performing a new infill project based on determined remaining oil in place and remaining reserves on reservoir zones.