Low-salinity fines-assisted waterflooding: Multiscale analytical and numerical modelling
Document Type
Conference Proceeding
Publication Title
SPE Reservoir Characterisation and Simulation Conference and Exhibition
Publisher
Society of Petroleum Engineers
School
School of Engineering
RAS ID
36504
Abstract
The aim of this work is the development of mathematical models for oil–water flow with varying injected water compositions in oil reservoirs. The model accounts for two main mechanisms of low salinity waterflooding (LSW): wettability alteration and salinity-variation-induced fines migration. Analytical and numerical models are developed and applied to low salinity fines-assisted core flood tests. In large reservoir scale, the general system of equations permits for an analytical solution. The solution is obtained by recently developed splitting technique, where the stream function is used as a variable instead of time. Large-scale approximation assumes that six dimensionless groups for dissipative and non-equilibrium effects are negligibly small. Numerical results are obtained for the general system, which accounts for dissipative and non-equilibrium effects. The effects of fines migration and wettability variation on oil recovery are discovered as two separate mechanisms in LSW. The significant EOR-effects of both mechanisms are observed under the typical oil reservoir conditions.
DOI
10.2118/186070-ms
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Comments
Borazjani, S., Behr, A., Genolet, L., Kowollik, P., You, Z., & Bedrikovetsky, P. (2017, May). Low-salinity fines-assisted waterflooding: Multiscale analytical and numerical modelling [Poster presentation]. SPE Reservoir Characterisation and Simulation Conference and Exhibition, Abu Dhabi, UAE. https://doi.org/10.2118/186070-ms