The effect of high temperature and aging on water-based drilling fluids

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" The effect of high temperature and aging on water-based drilling fluids "
M. S. Ali

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1112670
Doc. No	:	TLpq303958088
Main Entry	:	M. S. Ali
Title & Author	:	The effect of high temperature and aging on water-based drilling fluids\ M. S. Ali
College	:	King Fahd University of Petroleum and Minerals (Saudi Arabia)
Date	:	1990
student score	:	1990
Degree	:	M.Sc.
Page No	:	99
Abstract	:	Drilling fluid property changes due to elevated temperature and aging time frequently cause problems in drilling deep wells. A laboratory investigation of the effect of high temperature (490) and long aging time (30 days) on water-base drilling fluid properties is made with Fann Model 70 HTHP Viscometer and Baroid Roller Oven. The results show a decrease in viscosity, yield point and gel strength with the increase in temperature. Shear stress for a particular temperature increases with the increase in shear rate, but shear stress at a given shear rate decreases with the increase in temperature. Viscosity, yield point and gel strength at a given temperature increase with aging time and aging effects are diminishing with the increase in aging time. Shear stress at a given shear rate increases with aging time and aging effects decrease with the increase in aging time. Finally, the value of the exponent of power law index n is calculated and found to be always less than unity.
Subject	:	Applied sciences
	:	Petroleum production