Diagnostic plot model to evaluate injection performance in polymer EOR process

Abstract This study presents a diagnostic plot model to evaluate the injection performance of polymer flooding in a heterogeneous reservoir. To develop the model, comprehensive equation using an analytical method was proposed considering fully-developed cross-flow and saturation distribution due to polymer effects. The developed model was compared with the results from reservoir simulation to verify its accuracy. The comparison indicated that the model yields more accurate results than the other previous methods. Additionally, case studies have been performed to check whether any unexpected geological problem in the reservoir could be detected. From the results, the model can indicate the variation of the injectivity through geological problems such as semi-sealing and permeability improvement. Therefore, the model can provide specific information to improve injectivity and enhance the operational efficiency of polymer flooding.

[1]  N. Gaillard,et al.  Some Key Features to Consider When Studying Acrylamide-Based Polymers for Chemical Enhanced Oil Recovery , 2012 .

[2]  James J. Sheng,et al.  Modern Chemical Enhanced Oil Recovery: Theory and Practice , 2010 .

[3]  Ivonete Pereira Gonzalez da Silva,et al.  Polymer Flooding: A Sustainable Enhanced Oil Recovery in the Current Scenario , 2007 .

[4]  Ganesh Thakur,et al.  Waterflood surveillance Techniques - A Reservoir Management Approach , 1991 .

[5]  N. Pannacci,et al.  Normal Stresses and Interface Displacement: Influence of Viscoelasticity on Enhanced Oil Recovery Efficiency , 2012 .

[6]  R. E. Collins.  Flow of fluids through porous materials , 1961 .

[7]  B. Chon,et al.  Surfactant–polymer flooding characteristics for heavy oil recovery with varying injection volumes of surfactant and polymer , 2014 .

[8]  Martin J. Blunt,et al.  Polymer flooding design and optimization under economic uncertainty , 2014 .

[9]  Noaman El-Khatib,et al.  The effect of crossflow on waterflooding of stratified reservoirs , 1985 .

[10]  V. D. L. Cruz,et al.  An Analysis Of Buckley-Leverett Theory , 1986 .

[11]  William N. Hiatt,et al.  Injected-fluid Coverage of Multi-well Reservoirs with Permeability Stratification , 1958 .

[12]  G. Suresh Kumar,et al.  Enhanced oil recovery using oil-in-water (o/w) emulsion stabilized by nanoparticle, surfactant and polymer in the presence of NaCl , 2014 .

[13]  K. H. Coats,et al.  Prediction of polymer flood performance , 1971 .

[14]  C. L. Hearn,et al.  Simulation of stratified waterflooding by pseudo relative permeability curves , 1971 .

[15]  A. Alajmi,et al.  Improving polymer flood performance in high salinity reservoirs , 2014 .