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Graphene Effect on the Rheological Behaviour of Drilling Fluid

Banaei, Mohammad Hossein | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 47274 (66)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Ramezani Saadat, Ahmad; Jamshidi, Saeed
  7. Abstract:
  8. Since the early 90s, nanotechnology has contributed to several developments in a wide range of Science and industry such as medicine, Physics, Chemistry, Aerospace, electronics and Biology. In recent years, nanotechnology has also made development in the oil and gas industry. The drilling fluid is already one of the most important parts in drilling operation.The physical properties of a mud, rheological properties and minimize fluid invasion into the formation with perfect mudcake are important to assist in optimizing results. Nano-materials as one of the achievements of recent years are effective in achieving these purposes. To obtain the above properties, a variety of polymers as surfactants, viscosifier, lubricant and fluid loss control agent are added to the drilling fluid, but at high temperature and high pressure conditions (HTHP) and smart drilling fluid, these additives are unstable and will lose their properties. Therefore, the oil industry is looking for additive by small particle, chemically stability, biologically dissoluble, environmentally safe chemicals and Stable at high temperatures for drilling in certain circumstances. Due to this topic, nano-materials are more suitable than its reference materials. The nanoparticles are considered to be the most reliable selection of material for special drilling fluid design for drilling operations. Graphene oxide as one of the graphene components is one of the newest nano-materials in the industry that is examined in this study.This experimental study presents the effect of adding graphene oxide to several types of water based drilling muds and analyzes their effect on rheology, fluid loss, mudcake properties and drilling fluid stability. Water base drilling fluids with bentonite or sodium silicate can mostly make major problems as flocculation, loss of rheology control, undesirable mudcake and extreme friction due to high clay concentration. Polymers can relieve such problems, but Polymers are unstable in certain conditions drilling (high temperature and high pressure conditions and hi-tech technology drilling).Graphene oxide is used as additives to water based drilling fluids to improved mud rheology and also acts as coverage on cuttings preventing accumulation for minimizing fluid invasion and makes ideal mudcake with minimal fluid loss. Different percentages of graphene oxide were evaluated to determine the optimal value. The rheological treatment was described very well by the Herschel-Bulkley model. Graphene oxide addition resulted in growth of apparent viscosity, increase of the yield stress and decrease of the fluid loss with special pattern for this treatment. The morphology of the mudcakes was investigated using SEM (Scanning Electron Microscopy) until finding out the adsorption of the GO onto the filter paper.Also in this thesis, economic analysis was performed by improving hummer methods for produce graphene oxide with lower prices
  9. Keywords:
  10. Graphene Oxide ; Rheology ; Slurries ; Filter Cake ; Filtration Loss

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