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EOR from Micro-Scale to Field Implementation Example of Polymer Injection
Implementing Enhanced Oil Recovery (EOR) projects is challenging owing to the higher complexity and larger uncertainty of EOR projects compared with conventional water flooding. Portfolio screening followed by pilot testing and laboratory experiments reduce the subsurface uncertainties and improve the operating capabilities and the understanding of EOR projects. At the example of a polymer EOR project, it is shown that significant improvements in predicting polymer EOR performance have been achieved. Coupled geomechanical-fluid flow models are used to assess and optimize polymer injection incremental oil recovery. Furthermore, pilot interpretation was advanced by applying the latest tracer technology for reservoir characterization and monitoring. In addition to the subsurface assessment, a more holistic view on EOR pilot projects including surface challenges is required to ensure conclusive pilot test results to either implement or drop EOR full-field implementation. A long-term commitment is needed for EOR implementation as well as seamless cooperation between staff operating pilot tests and staff involved in pilot test interpretation.