Published August 2012

Inhibitors influence on the time while cement grout hardening

F.R. Nuriyev

The growth of country economic potential is directly connected with oil-gas industry development. At the moment well drilling, multi-purpose production and modern industry suggest a wide range of hardware and technologies in which it is necessary to study out in order to make right decision. While development of oil-gas producing complex the technologies, techniques and oil well completion become an important direction of science and production. For well cementing is applied cement slurry on the basis of Portland cement which after interflow with water has to give mobile solution pumped over. As time goes it gets thick and then becomes a waterproof cement stone. The possibility of cement slurries application is generally defined by setting time which depends on cement chemical-mineralogical content, chemical reagents added into the slurry, temperature, pressure and other factors. Cement grout has to be made in such a way that to prevent its setting while injection into the well. Consequently, application of inhibitors affecting increasing of cement setting time is unavoidable. In the article is reviewed the activity of lignosulphate slurries having inhibiting properties taking into account temperature change in the well. The laboratory experiments showed that while temperature index increase the inhibitor concentration influence decreases.