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Impact of Stress on Permeability of Packed Hydraulic Fracture

Taherzadeh, Dadbeh | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 50535 (66)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Shad, Saeed; Fatemi, Mobeen
  7. Abstract:
  8. Given the broad role of oil and gas playing in the world economy, finding the hydrocarbon reservoir that economically is affordable is quite significant. Some of the unconventional oil and gas reservoirs are important from the economic point of view since they produce insufficient hydrocarbon due to either low permeability or damage during drilling and production. Hydraulic fracturing is one of the most significant methods for improving the productivity of wells and reservoirs. Hydraulic fracturing acts by affecting on reservoir rock physic. In the current century, this approach has an essential effect in enhancing the permeability and production of reservoirs by creating, extending and propagating fracture inside the formation. A fracture is created due to pumping of fluids at sufficiently high pressure through the wellbore into the formation. This process followed by placing proppant into the growing fracture to prevent the fracture from closing after discontinuing the high-pressure injection process. The proppants between the surfaces of the fracture create a packed flow path. A pack can be defined as any manner of arrangement of solids. The propped fracture provides a narrow but very conductive and permeable flow path towards the wellbore, and increases significantly the permeability and production rate of the reservoir. If the proppant strength is not adequate, the closure stress will crush the proppant and generate fines that will significantly reduce the packed permeability, and thus the well productivity. Knowing how different proppants behave under changing stress conditions is important for conducting successful fracture stimulation and measuring the influence of stresses on overall permeability. This research tries to present a proper approach to the effect of stress on the permeability of packed hydraulic fracture and gives a better understanding of fracture design.
    The study of permeability of packed Hydraulic fracture in diverse stress conditions is achievable utilizing the mentioned model. The advantage of using this method is in choosing the needed proppant type and concentration which leads to optimal hydraulic fracturing design and simulation with high permeability and production.
  9. Keywords:
  10. Stress ; Permeability ; Modeling ; Hydraulic Fracturing ; Proppant Transport

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