Publications

The objective of this study is to review the existing pattern performance by utilizing the inter-well tracer test as a tool. Then, a streamline simulator is used to analyze the tracer test flow path. Afterward, we find the best scenario for the new pattern as well as a new scheme of waterflood to increase oil recovery. This study focuses on selecting the best scenario based on several parameters, including tracer time breakthrough [9], tracer production concentration, cumulative tracer production, and how the tracer flows in the streamlined model. Later on, these four parameters have analyzed their relationship between injection wells and production wells. The flow path observes a new potential of waterflood scheme. It is a "cyclic injection" scheme. The reservoir model is named PLC field. It can be categorized as a vast reservoir with porosity range within 30% to 35%, and the average permeability is 800 mD laterally. The current reservoir pressure is 310 bar, and the current temperature reservoir is 74oC. The datum point is in 1850 ftTVD SS, and Oil Gravity value is within 32-36oAPI and GOR value of 100 v/v. Waterflood has introduced in the field in 2018. Many scenarios of waterflood scheme have been implemented to get the best incremental oil. Then, the tracer streamline is used to get a better picture of the reservoir in term of transmissibility as well as the current water flow path with the existing parameters, such as pressure, water cut, GOR, etcetera. From the streamline modeling, it concludes that the best position of the injector should be selected based on oil cumulative. Subsequently, cyclic water injection is one alternative selected. This approach yields a quantifiable oil incremental recovery. The novelty of this method is the ability to solve the low sweep efficiency due to non-appropriate pattern design in reasonable understanding by utilizing a robust inter-well tracer test simulation and continued by a newly arranged waterflood scheme "cyclic injection."