冻胶泡沫体系室内实验研究

LABORATORY EXPERIMENTAL STUDY OF FOAMED GEL SYSTEM

通过室内模拟实验,将聚合物ZWP与交联剂DY-1复配优选出性能较优的冻胶体系,加入起泡剂GX与氮气后形成冻胶泡沫体系,同时评价了不同因素对冻胶泡沫体系成冻性能和起泡性能的影响。冻胶泡沫体系配方(质量分数)为ZWP(0.3%)+DY-1(0.3%)+GX(0.6%),该体系的稳定性随温度的升高而下降,压力对起泡体积的影响较小,且随着压力的升高半衰期明显增加。在冻胶驱、聚合物驱、水基泡沫驱、冻胶泡沫驱四种驱替方式中,相同渗透率及注入速率下冻胶泡沫的封堵能力最强。

In order to investigate on the profile control performance and plugging capacity of gel sys- tem, the gel system was optimized by compounding polymer ZWP with cross-linking agent DY-1 in la- boratory. And the foamed gel system was formed by mixing a certain concentration of foaming agent GX with nitrogen. Meanwhile the effect of different factors on gel performance and foaming property of the foamed gel system were evaluated. Through the entire evaluation procedures, the optimal foamed gel system formulation was ZWP （0.3 %） the foamed gel system increased with temperature ＋ DY-I（0.3%） ＋ GX（0.6%）. The stability of decreasing. Half-life time of foamed gel increased significantly with pressure increasing, but the effect of pressure on the foaming volume was very small. Foamed gel system had the highest resistance factor and residual resistance factor with the same permeability core sample and injection conditions among polymer flooding, aqueous based foam flooding, gel flooding and foamed gel flooding, that was to say, foamed gel flooding had the strongest blocking ability.