Control Ability of Nano-silica Reinforced Polymer Gel to High-temperature Formation Water
Polymer gel water plugging is a common method for water plugging in heterogeneous reservoirs.The gel network structure and crosslinking time of polymer gel systems are easily affected by harsh reservoir conditions.Adding nano-silica to it is an effective strengthening measure.In this paper,the viscosity,gel time,gel strength and water shutoff performance of nano-silica reinforced polymer gel were introduced.The results show that adding 0.5%nano-silica can help the gel to make up for the viscosity loss caused by high temperature and high salinity,effectively prolong the gelation time of polymer gel and improve the thermal stability of gel network structure.Under high temperature conditions,compared with the water plugging performance of single polymer gel,composite polymer gel has higher bearing capacity at high temperature.
NETL
NSTL
万方数据
