In gas condensate reservoirs, when fluid pressure decreases below its dew point pressure, it contributes to condensate build-up around the wellbore. Due to liquid condensation, gas and condensate relative permeability and mobility significantly drop and well productivity is considerably decreased. Several approaches have been recommended to mitigate condensate banking. Wettability alteration of the reservoir rock surface towards gas-wet is considered as one of the promising techniques for alleviating condensate banking. In this communication, a fluoro-chemical foam treatment technique is introduced to alleviate the condensate banking. To evaluate the effectiveness of the foam injection technique for the gas-wetting alteration of sandstone and carbonate cores, the contact angle measurement, liquid imbibition, and core displacement tests were conducted in the gas-liquid-core system. The adsorption of the fluoro-chemical solution on sandstone and carbonate samples was verified by surface analysis techniques including SEM, FTIR, and EDXS. The results show that the contact angles of brine and hexadecane droplets on the treated sandstone substrate increased from 0° and 0° to to135° and 103°, respectively. Moreover, treatment of carbonate substrate with fluoro-chemical solution resulted in an increase of 0° to 130° and 0° to 123° for brine and hexadecane contact angles, respectively. After treatment, the imbibition of brine and hexadecane liquids into the cores decreased significantly. Finally, the results of dynamic two-phase core flooding in sandstone and carbonate cores show that the chemical foam treatment can improve the end-point gas relative permeabilities by the factors of 1.704 and 1.69 for sandstone and carbonate cores, respectively.

在凝析气藏中，当流体压力降到其露点压力以下时，它将有助于凝析油在井眼周围堆积。由于液体冷凝，气体和冷凝物的相对渗透率和迁移率显着下降，并且井的生产率显着降低。已经推荐了几种方法来减轻冷凝水的沉积。储集层岩石表面向湿润方向的润湿性改变被认为是减轻凝析作用的有前途的技术之一。在此交流中，引入了一种含氟化学泡沫处理技术来减轻冷凝水堆积。为了评估泡沫注入技术对砂岩和碳酸盐岩岩心进行气体润湿改造的有效性，接触角测量，液体吸收，在气-液-岩心系统中进行了岩心位移测试。氟化学溶液在砂岩和碳酸盐样品上的吸附通过表面分析技术（包括SEM，FTIR和EDXS）进行了验证。结果表明，盐水和十六烷液滴在处理过的砂岩基质上的接触角分别从0°和0°分别增加到135°和103°。此外，用氟化学溶液处理碳酸盐基质会使盐水和十六烷的接触角分别增加0°至130°和0°至123°。处理后，盐水和十六烷液体向岩心的吸收明显减少。最后，