[01] Amin Shafie, Department of Petroleum Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran. [02] Farshad Farahbod, Department of Chemical Engineering, Firoozabad Branch, Islamic Azad University, Firoozabad, Iran. [03] Ghassem Zargar, Department of Oil Engineering, Petroleum University of Technology, Ahwaz, Iran.

The energy of a nation is largely conditioned by the extent of prospective, surveyed and extracted oil and gas reserves and other natural resources. Hence this is the main source of somewhere economy. The oil and gas sector in somewhere has many aspects where it functions; firstly, the confirmation of any natural resources on the earth crust is through drilling. Rheological specifications of drilling mud which contains nano zinc oxide (1gr) in high temperature – high pressure viscometer are considered in this work to simulate the drilling conditions occurred in deep wells. Shear stress versus shear rate is evaluated in this paper. In addition the effect of aging time and temperature on the stability power of drilling mud is considered. Results show the shear stress is decreasing with tha adding the nano particles.

Rheological Specifications, Nano Zinc Oxide, Drilling Mud, Gel Strength, Yield Point, Viscosity

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