C Cementing wells integrally is one aspect that is very important in a drilling operation, whether in oil wells or gas wells. The cement used to attach the circuit casing and isolate the production zone and to anticipate the problems that occurs in drilling. In well cementing activity, the quality of the well condition can be determined from the quality of the cement used. The quality of the cement that used is very important to notice in order to get the long last wells construction.Therefore, it needs laboratory research to determine the composition and physical properties of the cement that used in the well cementing operation. Drilling cement according to IPA spec 10A divided into several types, this research will discuss about Sawdust and Nut Shells effect for class G cement in compressive strength, thickening time, density and free water content. The result proved Sawdust is adding more hours in thickening time even it decrease the weight and strength almost 50%. However Nut Shells is a kind of cement additive which isused for increasing strength up to 25% and improve permeability without changing other parameter. With some trials in the laboratory, it will determine the function of each additive so it can be used in oil and gas industries with consideration of effectiveness, ecomomical, and eco-friendly.