The formulation optimization,temperature,salt resistance,plugging performance,flushing resistance and particle size matching of the dual-stimulated inorganic plugging agent were systematically studied for the high permeability,high condensation and extra high water-bearing sandstone reservoir in Henan oilfield.The results show that the retarder and ion-balancer are the dominant factors controlling the solidification time of the system,and the solidification rate of the dual-stimulated inorganic plugging agent increases with the increase of the concentration of the main agent and the stimulant as well as the temperature.When the mineralization of the liquid is higher,sulfate and chloride will accelerate the solidification time of the system.The double-stimulated inorganic plugging agent has strong plugging ability,good scouring resistance and deep fluid flow steering effect,which can effectively plug large pores in high permeability layer and improve the diversion rate of low permeability cores,and its plugging rate is higher than 98.5％.The field application effect confirms that the double-excited inorganic plugging agent can achieve deep targeting plugging.The advantages are high strength,long validity,and low cost,and the water content drops significantly after plugging.
关键词
中高渗油藏/高耗水条带/特高含水/无机堵剂/深部靶向封堵
Key words
medium and high permeability reservoir/high water consumption zone/extra-high water cut/inor-ganic plugging agent/deep targeted plugging
维普
万方数据