地层流体对压裂用疏水支撑剂润湿性的影响

通过Washburn法测试了两种疏水支撑剂的三氯甲烷接触角,考察了疏水支撑剂经模拟地层流体在不同条件作用后的润湿性变化情况。实验研究表明:经模拟地层水浸泡的疏水支撑剂,其表面润湿性向亲水性方向转变,且温度越高、地层矿化度越高和作用时间越长,支撑剂的表面润湿性愈向亲水性转变;而经模拟油浸泡的疏水支撑剂,具有相似的规律,但其表面润湿性是向亲油性(疏水性)方向转变。

Study on the Wettability of Fracturing Hydrophobic Proppant Soaked by Simulated Formation Fluids

The contact angle of hydrophobic proppants were directly obtained using Washburn method with chloroform as test liquid, at the same time, the variation of hydrophobic proppants wettability those were soaked by simulated formation fluids under the different conditions were characterized by contact angle. The results show that the wettability of hydrophobic proppants soaked by simulation water were change into the hydrophilic direction, and high temperature, high salinity and a longer duration of action, the surface wetting aptitude to water is more obvious; the proppants soaked by simulation oil under the same condition have the same results, i.e the wetting aptitude to hydrophobic is more apparent.