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Experimental Analysis of the Effect of Fluid/Fluid and Fluid/Rock Interactions on the Pore Scale Displacement Mechanisms of Oil by Lswi

Siadatifar, Emad | 2020

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52632 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Fatemi, Mobeen; Masihi, Mohsen
  7. Abstract:
  8. Visual investigation of the low salinity water injection into micromodel is the goal of this research. Although many researches have been performed to realize the dominating mechanism behind the increased oil recovery after low salinity water injection, many contradictions exist among the studies. Mechanisms are generally divided into two classes. One class is due to fluid/fluid interactions and the other one is due to fluid/rock interactions. A comprehensive set of experiments are conducted in this study to find out the dominating mechanism behind low salinity water injection under the existing conditions of the experiments. Effect of different wettability condition and presence and absence of carbonate in the micromodel are investigated. The experiments suggest that wettability alteration, IFT reduction, osmosis effect, formation of micro-dispersions and clay migrations cannot be considered as the main mechanism to justify low salinity water effect in the experiments. Oil-wet system was required to maintain the continuity of the oil film and observe low salinity water effet. Oil continuity broke under water-wet condition and no low salinity water effect was observed for this wettability state. Since continuity of the oil phase was imperative to see the low salinity water effect, formation of a visco-elastic interface is deemed to be the main reason for low salinity water effect observation. Presence and absence of carbonate did not paly a vital role in low salinity water effect observation and the results of coated and noncoated micromodel were analogous
  9. Keywords:
  10. Fluid-Fluid Interaction ; Micromodel ; Low Salinity Water Flooding ; Fluid-Rock Ineraction ; Enhanced Oil Recovery

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