Improve oil well cements performance by commercial nano additive

Cementing operation is one of the most crucial and costly activities performed in the oil wells. The main aim of cementing has always been to separate different fluids in the behind of casing in the oil well. Consequently in this study, a new nano additive was added to a typical kind of oil well cement at different concentrations (5 to 30 wt.%) and then different cylindrical molds were prepared and liquid contact angles were calculated by sessile drop technique .It was observed this additive improved water repellency of cement, in order, in the best case this additive increased water contact angle from 0 to 80.560. After that, the optimum additive concentration (lowest concentration, 5 wt.%) was chosen for rheological tests and modeling studies. It was observed this additive doesn’t have a significant effect on rheological characteristics of cement. On the other hand, this additive promoted water repellency of cement while kept the rheological characteristics of the original oil well cement.

Keywords:

Oil well cement , Water repellency , Rheology , Bingham and Herschel- Bulkley model