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Silicone drilling fluid Daqing Qingshen gas field drilling fluid system , field application . With the increase in the depth of the well , the increasingly high demand for drilling fluids , re- evaluation of the drilling fluid system . This paper summarizes the application of silicone drilling fluid system , in the interior of the drilling fluid system resistant to high temperatures , thermal stability , anti-pollution performance and inhibit performance , re- evaluation , the results show that , the drilling fluid under the conditions of 240 ℃ after hot rolling the rheology , thickening and gelling did not occur , the apparent viscosity and plastic viscosity increase as aging temperature was increased slowly ; dynamic shear force with the increase of temperature , moving plastic ratio increases portability rock ability , so as to maintain the smooth flow of the wellbore and bottomhole cleaning , provide a strong guarantee for the safety of underground construction ; same time has a good performance of the semi-permeable membrane , has a strong inhibitory simple performance processing , logging , recorded well the job had no effect , a quality water-based drilling fluid system to adapt to the deep exploration wells drilled .
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