注入水对敖南低渗透油田储层渗透率的影响

Permeability Effects of the Flood Water in the Ao-nan Low Permeability Oilfield

确定了敖南油田储层的水敏系数在0.20—0.50之间,具有中-强水敏性;岩心实验表明:注入水对敖南油田低渗透岩心产生持续的伤害,伤害率小于20%。注入水中悬浮颗粒粒径对地层渗透率产生影响。当粒径小于2.0μm时,渗透率下降小于10%。

The water-sensitive factor of the Ao-nan oil field reservoirs is between 0.20—0.50 and the water sensitive is strong. The core tests show that the foold water causes sustained damage to the low permeability core of the Ao-nan oil field and the damage rate is less than 20%.The suspension particle size has effects on the reservoir permeability. When the particle size is less than 2.0 μm,permeability declines less than 10%.