[01] Mohammad Sadegh Sharifi, Department of Chemical Engineering, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran. [02] Daryoush Emadzadeh, Department of Chemical Engineering, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran.

The experiments are held to investigate the effect of aging time and temperature on a prepared oil based drilling mud which contains nano aluminium oxide particle. The rheological specifications of drilling mud in high temperature – high pressure viscometer are considered in this work to simulate the drilling conditions occurred in deep wells. Also, the effect of using nano particle is investigated comparing the Rheological behaviour of simple oil based drilling mud with that is obtained from nano- oil based drilling mud. So, shear stress, shear rate, effective viscosity, plastic viscosity and gel strength are measured versus temperature and working time for two types of drilling mud. Results represent the rheological treatment of drilling mud in a range of temperature and aging time so are applicable and useful in prediction of the amount of required shear force or shear stress at a defined temperature and time to reach a defined shear rate.

Rheological Specifications, Oil Based Drilling Mud, Strength, Yield Point, Viscosity

[01] Amoco Production Company Drilling Fluids Manual, 1975, pp. 1-3. [02] Asselman, A. and Garnier, G., Adsorption of model wood polymers and colloids on bentonites, Colloids and Surfaces A: Physicochemical and Engineering Aspects 168, Elsevier, (2000), 175–182. [03] Bagci, S., Kok, M. V. and Turksoy, U., 2000. Determination of formation damage in limestone reservoirs and its effect on production. JPSE 28, pp. 1–12 October. [04] Bennion, B., 1999. Formation damage—the impairment of the invisible and uncontrollable, resulting in an indeterminate reduction of the unquantifiable. J. Can. Pet. Technol. 38, 2, pp. 11–17. [05] Bennion, D. B., Thomas, F. B., Jamaluddin, A. K. M. and Ma, T., 2000. Using under balanced drilling to reduce invasive formation damage and improve well productivity—an update. J. Can. Pet. Technol. 39, 7, pp. 53–60. [06] Bruton, J., Mercer, R. and Paul, D., 2000. The application of new generation CaCl₂ mud systems in the Deepwater Gulf of Mexico. In: IADC/SPE Drilling Conf., New Orleans, February. SPE 59051. [07] Caenn, Ryen and Chillingar, G. V., (1996) Drilling fluids: State of the art. Journal of Petroleum Science and Engineering, 14, 221-230. [08] Chatterji, J. and Borchardt, J. K., (1981) Application of water soluble polymers in the oil field. Journal of Petroleum Technology, 2042-2054 (November). [09] Chilingarian, G. V. and Vorabutr, P., 1983. In: (1st ed.), Drilling and Drilling Fluids vol., 133, 50 Elsevier, Amsterdam, Netherlands, pp. 149–151. [10] Elward-Berry, J. and Darby, J. B., 1997. Rheologically stable, nontoxic, high temperature, water based drilling fluid. SPE Drill. Complet. pp. 158–162 (September). [11] Jilani, S. Z., Menouar, H., Al-Majed, A. A. and Khan, M. A., 2002. Effect of overbalance pressure on formation damage. JPSE 36, pp. 97–109. [12] Khoja, A. K. and Halbe, A. V., 2001. Scope for the use of tamarind kernel powder as a thickener in textile printing. In: Man-Made Textiles in India, pp. 403–407 (October). [13] Lummus, J. C. and Azar, J. J., 1986. In: Drilling Fluids Optimization—A Practical Field Approach vol. 11, 2, PennWell Publishing, Tulsa, Oklahoma, p. 160. [14] Mahto Vikas. “Development of water based drilling fluids using tamarind gum and partially hydrolyzed polyacrylamide” Proceedings of MPT-2007, International Seminar on Mineral Processing Technology, February 22-24, 2007. [15] Parija, S., Misra, M. and Mohanti, A. K., 2001. Studies of natural gum adhesives: an overview. J. Macromol. Sci., Polymer Rev. C41, 3, pp. 175–197. [16] Plank, J. P., 1992. Water based muds using synthetic polymers developed for high temperature drilling. Oil Gas J. 90, 5, pp. 40–45. [17] Simon, S., Cerf, D. L., Picton, L. and Muller, G., Adsorption of Cellulose Derivatives onto Montmorillonite: a SEC–MALLS Study of Molar Masses Influence, Colloids and Surfaces A: Physicochemical and Engineering Aspects 203, (2002), 77–86. [18] Toka, B., Toka, N., Preparing Drilling Fluid Compositions for Geothermal Reservoirs, The General Directorate of Mineral Research and Exploration. Proceedings World Geothermal Congress 2015.