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Drilling mud is the most important part in drilling activity. Drilling could work fluently, save, and economical on fluence by system and condition of drilling mud. It means the mud system and the physical properties of the slurry conform to the required specifications. There are some kind of drilling mud that can be use on oil and gas drilling operation, such as water base mud and oil base mud. In terms of economical, water base mud is usually use in drilling process. The purpose of this study is to find conducted laboratory research of the effect of differences temperature for characteristic mud system of low solid mud with adding biopolimer and bentonite extender. This research used roller oven method as a medium for simulation to condition the mud as if to be in the well to see the change of physical properties of sludge at differences temperature. The result is found that the higher the temperature, the drilling mud physical properties like density, viscosity, plastic viscosity, yield point, dial reading 600 RPM, dial reading 300 RPM, and gel strenght decrease. But not all the physical properties decreased.