PA-VERT的性能评价及应用

Performance Evaluation and Usage of PA-VERT

冯浦涌 荣新明 杨永庆 彭雪飞 崔 波

FENG Pu-Yong RONG Xin-Ming YANG Yong-Qing PENG Xue-Fei CUI Bo

针对酸化施工的需要，研制了一种润湿反转多效添加剂PA-VERT，通过界面张力、润湿角测定以及物模实验评价了其界面活性、润湿反转性能、助排性、防水伤害能力和洗油能力。实验结果表明，PA-VERT界面活性优异，可将油水界面张力降至10-2 mN/m数量级；经过1%PA-VERT溶液浸泡处理后，砂岩、碳酸盐岩表面由油湿转变为水湿；作为入井流体添加剂使用时可以降低恒定压力下的水侵速度，并且通过降低油驱水的压力，可有效解除水锁伤害，具有良好的助排性能和防水伤害的能力。

A reversal wetting multi-effect additive（PA-VERT）was proposed in the paper, and the interfacial activity, wetting reversal performance, cleanup ability, waterproof damage capability and oil-washing ability of PA-VERT were evaluated through the measurements of the oil-water interfacial tension，wetting angle and the physical model experiments. Experimental results showed that the PA-VERT had excellent interfacial activity and could reduce the oil-water interfacial tension to 10-2mN/m order of magnitude. The carbonate rock surface could be changed from oil-wet to water-wet with the treatment of the 1%PA-VERT solution. It could also significantly reduce the water influx rate at the constant pressure, as well as the pressure of oil driving water，which could effectively relieve water blocking damage，so it had high cleanup rate and strong ability of preventing water-damage; Besides， the additive has strong oil-washing power，and the increase of the temperature was beneficial to improve its capability of washing oil.