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Experimental Study of Nano-bio Material Injection for Heavy Oil Recovery in Shaly Systems Using Micro-model Apparatus

Mohebbifar, Mahdi | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44571 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Vossoughi, Manouchehr; Ghazanfari, Mohammad Hossein
  7. Abstract:
  8. In this research we aim to find enhance oil recovery mechanisms involved in nano-bio material injection by micro model apparatus which has not been studied before. Especially for injection in heavy oil and shaly porous media that forms most of heavy oil reservoirs. To this end, microscopic images from injection of nano-bio materials to shaly patterns have been taken and analyzed to find the process mechanism. Also amount of enhance oil recovery in different conditions like type of microbe forming bio material, nano-bio material concentration and type of flow pattern (shale characteristics including length, direction and distance from injection and production wells) will be studied.Three types of biomaterials including biosurfactant, bioemulsifier and biopolymer beside SiO2 and TiO2 nanoprticles are used as injection fluids. Results show that presence of shale in porous media cause viscous fingering, early breakthrough and ultimate oil recovery reduction. In shale less homogenous patterns, oil recovery after breakthrough is approximately constant; but in shale containing patterns, oil recovery is progressive and considerable volume of oil in place will be recovered after breakthrough.EOR mechanisms involved in nano-bio material injection are including: interfacial tension reduction between oil and water phase, water in oil emulsion formation, selective plugging, increasing capillary number and wettability alteration. To quantify wettability alteration, contact angle experiments were performed on rock thin sections. Wettability changed from oil wet conditions to water wet and nutral conditions.Maximum recovery, 78%, obtained while injecting nano-bio polymer in 3000 ppm concentration for one pore volume of injection fluid. In the limitations of this project and comparing other results, nano-bio polymer injection is being suggested as the optimum EOR method
  9. Keywords:
  10. Micromodel ; Nano-Biomaterial ; Displacement Mechanism ; Wettability Alteration ; Shale Porous Media

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