凝析气藏氟碳气湿反转剂FC-1的室内研究

Laboratory Study of a Novel Fluorocarbon Gas-Wetting Reversal FC-1 for Condensate Gas Reservoir

本文采用核壳乳液聚合法制备了一种氟碳气湿反转剂FC-1,采用红外光谱表征了共聚物的结构,对FC-1处理前后岩心的接触角、表面能谱、扫描电镜和透射电镜等表征。结果表明:FC-1为含氟丙烯酸酯共聚物。FC-1对岩石有良好的气湿反转能力,处理后的岩心表面由强亲液转变为疏油疏水的中性气湿。经10%FC-1溶液处理并经100℃热处理12 h后的岩心,蒸馏水在其表面的接触角最高可达124.98°,正十六烷在其表面的接触角可达84.69°,表面能降低至8.33 mJ/m2。

A fluorocarbon gas-wetting reversal FC-1 was developed in this paper by core-shell emulsion polymerization, and the structure of FC-1 was confirmed by infra-red （IR） spectrum. The measurement of contact angle （CA） and surface energy spectrum, scanning electron microscope （SEM） and transmission electron microscope （TEM） of the cores treated with FC-1 were carried out. The IR results confirmed that the fluoroacrylate copolymer was obtained. The results of CA, surface energy, SEM and TEM proved that the laboratory gas-wetting effect of FC-1 was superior. When the cores were treated by 10% FC-1 and heat-treatment of 100℃ for 12 h, the wettability of the treated cores converted from strong liquid-wetting into intermediate gas-wetting. The contact angles of distilled water and hexadecane on the surface of the treated cores, was up to 124.98° and 84.69° respectively, and the rock surface energy reduced to 8.33 mJ/m^2.