%0 Journal Article %T EXPERIMENTAL STUDY OF THE EFFECT OF TEMPERATURE ON THE FLOW PROPERTIES OF NORMAL OIL BASED MUDS IN NIGER DELTA FORMATION %A Olufemi A. Adekomaya %A Dolapo M. Anifowose %A Talabi Wale %J Petroleum and Coal %D 2011 %I Slovnaft V?RUP %X The behaviour of the drilling fluids under high temperature is extremely important for drilling deepwells. Most commercial oil base drilling fluid systems have limitations such as reduced rheology andfiltration control if the fluid is exposed to higher temperature for prolonged periods of time. Formulating adrilling fluid system that can adequately withstand drilling in a high temperature environment is verychallenging but very often little attention is given to proper fluids design. In this research, a normal oilbased mud suitable for Nigerian formation was formulated and was aged under high temperatureconditions for 16 hours. The effect of aging on the properties of drilling fluids was studied. From thestudy, it is concluded that rheological changes in drilling fluids have many effects on the degree ofefficiency with which a fluid performs its primary functions and it is important that efforts are made tominimize these detrimental effects. %K drilling mud %K viscosity %K gel strength %K fluid loss %K yield point. %U http://www.vurup.sk/sites/default/files/downloads/pc_2_2011_olufemi_107-final.pdf