砂岩储层中大孔道形成机制及防治措施

Formation mechanism and control measures of large pore in sandstone reservoir

注水开发过程疏松砂岩油藏中,易形成大孔道,虽然大孔道有利于原油渗流。但是,大孔道导致注入储层的水无效循环,降低采收率。通过降低注水速度,避免了大孔道出现。

In the process of water injection development,it is easy to form large pores in unconsolidated sandstone reservoirs.However,the large pore leads to the ineffective circulation of the injected water and the reduction of oil recovery.By reducing the water injection rate,to avoid the emergence of large pores.