Presentation on theme: "Pore-Scale Analysis of WAG Flooding V. Sander Suicmez Dr. Mohammad Piri Prof. Martin J. Blunt 5 Jan 2005 Centre for Petroleum Studies Department of Earth."— Presentation transcript:
Pore-Scale Analysis of WAG Flooding V. Sander Suicmez Dr. Mohammad Piri Prof. Martin J. Blunt 5 Jan 2005 Centre for Petroleum Studies Department of Earth Science and Engineering Imperial College London
Outline Introduction What has already been done? Two- and three-phase pore-scale configurations Two- and three-phase pore-scale configurations Displacement mechanisms Validation - comparison with experimental data What is new? New displacement mechanisms More complicated saturation paths A generic WAG study Conclusions & Future Work
What do we have? Piri, 2003 A three-phase flow simulator (incorporating geologically A three-phase flow simulator (incorporating geologically realistic network model) with full extension of possible realistic network model) with full extension of possible generic configurations for any wettability. generic configurations for any wettability. A robust clustering algorithm incorporating coalescence and break of trapped clusters. and break of trapped clusters. Point-by-point comparison with data using saturation path tracking algorithm. path tracking algorithm.
Example Displacement Sequence Configuration B Configuration A Configuration B Configuration A Configuration C Primary DrainageWater Flooding Gas Injection Configuration F Layer Collapsing Gas Injection Gas Water Oil
Saturation Tracking Oak data, Piri, 2003 Measured and tracked saturation paths
Conclusions Water first invades the smaller throats at the dead-ends which does not change the gas relative permeability With snap-off process gas phase gets trapped There is a significant number of Double Displacement events Multiple Displacement is not required. However wettability conditions, spreading coefficients and saturation paths may change the situation
Future Work Debugging the code!!! Predicting the relative permeability behaviour of WAG process for different wettability conditions. Quantitative match with experimental data Come up with a new empirical three phase relative permeability model
Acknowledgments Shell Schlumberger Statoil BHP BG Saudi Aramco Eni Total Japan National Oil Corporation (JNOC) Department of Trade and Industry (DTI) EPSRC We are thankful to the members of the Imperial College Consortium on Pore-Scale Modelling for their generous and continued support to our research:
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