Abstract
Non-Newtonian fluids are often injected into reservoirs as polymeric solutions to provide mobility control during enhanced oil recovery by polymer flooding. These fluids reduce interfacial tension between water and oil thereby improving volumetric sweep efficiency. Pressure falloff (PFO) tests conducted after injection provide a means of monitoring the performance of the injected fluid. Analysis of these tests poses unique challenges because, unlike Newtonian fluids, techniques for data analysis and interpretation have not been fully developed.The objective of this study is to investigate the effects of external reservoir boundaries on pressure behavior at the observation well. The equation governing the flow of non-Newtonian fluids through porous media is solved analytically. Dimensionless pressure solutions are obtained in Laplace domain and inverted using a numerical inversion algorithm. New type curves were developed from these solutions and long-time analytic models, including step-by-step procedures of interpretation, are proposed. These procedures were applied to two example problems, including a real field data of PFO test conducted after polymer injection in a Middle Eastern field. The procedures developed in this study are useful in estimating test duration needed to observe a particular flow regime that is required to estimate reservoir and flow parameters.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
