Development of lightweight cement slurries for stabilizing producing formation in absorbing wells

Abstract

The paper presents the results of laboratory investigations on the development of lightweighted cement compositions for improvement of stabilizing of producing formation, as well as the hermetization of the areas with low frac gradients. To obtain lightweighted cement, few optimum compositions have been specified through experiments adding the agents in various thickness and concentrations into the mixture. The distribution of optimum compositions, the beginning and end of the hermetization, the solidness and density have been defined. The density of cement slurry developed on cement+seawater is 1900 kg/m3, the density of that on the cement+seawater+chamotte+bark+polymer+CaCl2 is 1610 kg/m3, the density of one developed on the cement+seawater+bark+CaCl2+carbonate+Al powder is 1700 kg/m3 and the density of cement slurry on cement+seawater+bark+CaCl2+keramzit comprised 1590 kg/m3.