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Investigating the Performance of Preformed Particle Gels (PPGs) for Conformance Control and Improve Oil Recovery in Heterogeneous Porous Media: Pore-Scale Analysis of Displacement Mechanisms

Paprouschi, Aminsadegh | 2019

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 51833 (66)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Ghazanfari, Mohammad Hossein; Fatemi, Mobeen
  7. Abstract:
  8. According to the reported field experiences, excess water production from high permeable thief zones of oil reservoirs is the main source of severe operational problems and economic issues. Application of Preformed Particle Gels (PPGs) is an effective technique to overcome this problem. Static test analysis is a primary method for evaluating the performance of PPGs material at different conditions of pH, salinity, etc. However, the effect of the presence of oil and rock on the kinetics of swelling/de-swelling of PPGs is not well understood. Also, considering the vast field application of Co_2-based oil recovery methods, it is interesting to study the effect of carbon dioxide gas on swelling kinetics and performance of PPGs, especially at the pore scale.Briefly, this research includes two parts. In the first part synthesis pattern of Sodium Silicate Preformed Particle Gels (SPPGs) with regard to the nanomaterials have been studied for the first time and different percentages of Graphene Nanoplatelets (GNP) were evaluated to determine the optimal value of hydrogel. Also, the swelling behavior of PPGs at different conditions of pH, Anions/Cations type and concentration and temperature will be investigated through static tests. This experimental study will assess the PPGs effect on dynamic rheology mode, in other words, Graphene Nanoplatelets and sodium silicate are used as additives to gel structure to improved rheology and optimum swelling in various conditions. Also, by using SEM (Scanning Electron Microscopy), the morphology of the dry particle gel was investigated in the second part. By using Hele-Shaw Cell setup experiments, the displacement mechanisms of PPG will be investigated in the fracture model. The research will also address how Co_2 injection may affect the pore-scale displacements of PPGs
  9. Keywords:
  10. Preformed Particle Gel ; Swelling Kinetics ; Conformance Test ; Fractured Porous Media ; Dynamic Test

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