泡沫复合驱体系稳定性及稳泡机理研究

STUDY ON FOAM STABILITY AND STABILITY MECHANISM OF COMPOSITE FOAM FLOODING

泡沫复合驱油技术目前已在我国部分油田应用,选择泡沫性能优良的复合体系会推动该技术的广泛应用。文章研究了泡沫复合体系中发泡剂、稳泡剂和碱对复合体系稳定性的影响。筛选出配伍性较好配方是1.0%十二烷基苯磺酸、0.5%木质素黄酸盐与0.5%碱水复合体系,并对其进行了耐温、抗盐、抗油污染性能评价。通过扫描电子显微镜拍摄的泡沫照片分析,一般情况下泡沫体系Plateau边界越规则,泡沫半衰期越长,泡沫越稳定;泡沫间液膜越厚,发泡体积越小,发泡性能越差。该泡沫复合配方的确定对矿场实验具有一定的指导意义。

The Composite Foam driving oil technique is used in part of oilfield in China.The paper studied the effect of different foamer,foam stabilizer and alkali on foam stability in foam combination system.The selective formulation on foam combination system contains dodecylbenzene sulfonic acid 1.0%,lignosulfonate 0.5% and alkali 0.5%.Meanwhile,the experiments of salt tolerance,thermal resistance,anti-oil nature have also been carried out.The scanning microscope pictures of foam show that the more regular Plateau's border is,the longer the foams half-life is.The thicker the fluid membrane is,the poorer bubble performance of the foam is.The determination of foam combination component has significance for field test.