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Designing Drilling Mud Using Environmental Resistant Polymers and Investigation of Rheological Properties and Stability to Achieve Optimal Formulation

Soleimanian, Alireza | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50356 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Ramezani, Ahmad; Goodarznia, Iraj
  7. Abstract:
  8. The purpose of this project is to design a water-based drilling fluid for use in high-pressure and high-pressure conditions (Deep Drilling). This goal is usually achieved by adding the resistant polymers to the ambient conditions (temperature stability) to the drilling fluid (here the blue base fluid), and then the rheological properties of the fluid are studied. The stability of the rheological properties of the fluid in high temperature and high pressure conditions is not constant. In this situation, a sequence of events occurs, for example, decreases with increasing viscosity and turbulence, and hence the reduction of drilling fractures and the efficiency of the bottom of the well is reduced. Examining and evaluating the above suggests an understanding of the effect of fluid loss. For example, the speed of drilling fluid in both horizontal and directional is low, so the possibility of penetration of filtration into the formation increases, which increases the amount of damage. Increasing the amount of damage caused a series of problems that should be considered. For example, with the continuation of drilling, the diameter of the well has been reduced, and such things as blowing the shale or creating a flower cake on the well wall, which indicate structural damage, cause problems such as tightness of the pipe, increase in costs, and the amount of mast day. Therefore, the design of proper drilling fluid in this project seems perfectly logical to achieve optimal performance and formulation for industry applications. Drilling in deep wells with high temperatures depends heavily on the rheological properties of drilling fluid. For example, rheological properties such as viscosity under well conditions are definitely very different from those measured at the surface due to the effect of temperature and Shear stress is based on the properties of drilling fluid. Increasing the temperature decreases the effect of most drilling fluid extensions that, for example, cause the rheology to stabilize or reduce FL or other fluid properties. Issues and problems associated with temperature rise are infused with chemicals such as calcium or magnesium or sodium salts. High-temperature issues in the well itself are considered as one of the drilling fluids that are not treated with any cure
  9. Keywords:
  10. Styrene ; Viscometer ; Starches ; Water-Based Drilling Fluid ; Rheological Properties ; Polymer Modified with Hydrophobic Groups ; Polymer Additives

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