分子沉积膜驱剂对油藏矿物润湿性的影响

Effect of molecular deposition film oil displacement agent on the wettability of reservoir minerals

分子沉积膜驱油 (简称MD膜驱油 )是一种新的提高原油采收率技术 .为考察MD膜驱剂吸附对不同性质的矿物表面润湿性的影响 ,利用Washburn法分别研究了水和正庚烷在这些矿物上的润湿性变化 .结果表明 ,具有强亲水活性中心的表面吸附MD膜驱剂后 ,亲水性会减弱 ;亲水性较弱的表面吸附MD膜驱剂后 ,水润湿性变化不大 ;中间润湿性的表面吸附MD膜驱剂后 ,水润湿性增强 .MD膜驱剂处理前后不同矿物表面亲水性和亲油性的变化幅度不尽一致 ,说明研究油藏矿物表面MD膜润湿性时需同时考察亲水性和亲油性 .

Molecular deposition film flooding is a new recovery factor enhancing technique. To investigate the effect of molecular deposition film oil displacement agent on the wettability of reservoir minerals, the changes of the wettability of water and n-heptane on the minerals adsorbing oil displacement agent are studied by Washburn method. The results show that the wettability of water on the surfaces with strong hydrophilic centers declines, that on the surfaces with intermediate hydrophilicity increases, while that on weak hydrophilic surfaces changes little. The variations of reservoir mineral surface in hydrophilicity and in lipoohilicity are not always inverse. Therefore, they should be simultaneously studied.