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Predictions of Formation Damage Due to Inorganic Scale Deposition during Water Injection in Oil Reservoirs Using Experimental-Based Mathematical Modeling

Rahbari, Mohammad Reza | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 49648 (66)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Ghazanfari, Mohammad Hossein; Masihi, Mohsen
  7. Abstract:
  8. Water flooding is known as a common method to maintain reservoir pressure/enhance oil recovery. The major problem in this process induced from inorganic deposits that caused formation damage around wellbore region. It is due to incompatible nature of injected and formation water which results in permeability reduction and well productivity decrease. Solving this problem is an important issue in the petroleum industry. BaSO4, CaSO4 and SrSO4 are inorganic sediments formed in this process. The physical model of water transport in reservoir and scaling damage due to sediments contains at least two dominant parameters; the kinetics coefficient that specifies the velocity of chemical reaction, and the formation damage coefficient that shows permeability decrease due to sediments deposition. In this study, the kinetics coefficient should be determined based on core flood laboratory results and analytical relationships during semi steady state injection of seawater and formation water. Also data of pressure drop during core flooding are used for evaluating the formation damage coefficient. After model validation, the results of various parameters on proposed model are explained. Modeling examined in this study can be extended for flow around the well and value of formation of damage in real reservoirs can be evaluated by using laboratory results
  9. Keywords:
  10. Formation Damage ; Mathematical Modeling ; Kinetic Coefficient ; Water Injection ; Oil Tanks ; Inorganic Sediments

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