Application of Fluid Contact Analysis for Well Optimization and Field Development Strategy in Kerning Field, Central Sumatera

Abstract

Determination of a fluid contact in brown field is essential for production optimization and well development strategies. In the last four years, production optimization in Kerning Field has been focused to drain Charlie and Delta Reservoir intervals which characterized by very clean sand, high quality and high fluid rate with strong water drive mechanism. However, water coning phenomena occurred in the existing production intervals, thus the identification of fluid contact is very essential to seek another potential reservoir to optimize and identify sweet spot area for new well placement.

This paper presents a technique to determine a fluid contact by integrating static and dynamic data such as well logs, oil allocation from fingerprint analysis, production test and completion history data. The fluid contact analysis performed for 44 active wells and eight reservoirs in end of 2020. Fluid contact interpretation indicates thick remaining oil column in Alpha and Beta that was attractive to optimize due to unproduced for more than 10 years. Eight workovers and four infill wells executed along 2021 – 2022, it resulted total 3,076 BOPD of initial production gain with 83% of success ratio. Application of this fluid contact methodology has proved strong capability to identify potential by passed oil. It can be applied to common problems of fluid contact determination in other field areas.