Properties and plugging behaviors of smectite-superfine cement dispersion using as water shutoff in heavy oil reservoir

Fig. 7. The adaptability of smectite-cement dispersion. A new water shutoff agent is prepared with the smectite-superfine cement dispersion. This agent has good thixotropic, suspension stability and injection performance, higher plugging strength and better high-temperature stability. Based on Fig. 7, the most suitable cement content can be easily selected according to corresponding permeability and plugging strength.80