Laboratory study of Nano-silica on the Properties of Extended-Reach Drilling (ERD) Cement Slurry

Cement work is one of the most critical operations during the drilling and completion of oil wells. On the other hand, designing horizontal well cement slurry is one of the most critical challenges for the oil industry. For this purpose, we have designed cement slurry in cementing long horizontal wells using nanoparticle. In this research, silica nanoparticles and Class E cement were used. To investigate the effect of silica nanoparticles on cement slurry, we performed some experiments such as cement slurry rheology tests, free water at a standstill test, fluid loss test, stability, initial setting time, and final compaction strength of cement stone. The use of the nano-silica additive in longitudinal horizontal well drilling cement is investigated for the first time in this study, five slurry compounds with weight percentages of ۰, ۱, ۰.۵, ۰.۳, ۰.۲ of Nano silica is used. The results showed that the best amount of nano-silica to improve cement quality in ERD wells is ۰.۳% by weight of dry cement. The use of this amount of nano-silica in the designed slurry reduced the amount of free water and water losses in the slurry and increased the compressive strength of the cement.

Keywords:

Cement slurry , Nano silica , Cement rock strength , Cement setting time , Horizontal well