摘要
为解决新疆红山嘴油田火驱试验区烟道气气窜严重、火驱开发效果降低的问题，开展了对注气井气体流度控制体系的筛选与性能评价，为有效改善吸气剖面，提高火驱开发效果提供依据。针对烟道气的流度控制，以起泡体积和泡沫半衰期为性能参数，在五种起泡剂和四种稳泡剂中优选出在高温350℃下气体流度控制体系的配方为：5 g/Lα-烯基磺酸钠(AOS)+2 g/L十二烷基苯磺酸钠(SDBS)+0.5 g/L羟乙基纤维素HEC。用矿化度为10902.1 mg/L的模拟地层水配制的100mL起泡液的起泡体积为700mL，泡沫半衰期为170 min。矿化度从0mg/L增至10902.1mg/L时，各项参数变化幅度较小，表现出较好的耐盐性；耐油性实验结果表明在含油饱和度大于10%后，各项参数显著降低，表现出较好的遇油消泡性，体现出泡沫对地层流体的选择性。图4表3参13
Abstract
In order to solve the problem of serious gas channeling of flue gas that reducesdevelopment effectin the process of fireflood, the screening and performance evaluation on gas mobility control system in gas injection well was carried out, which provided the guarantee to improvement of gas entry profile and development effect. Using foam volume and foam half-life time as parameters, the most optimized formula at 350℃ was as follows,5 g/L Sodium alpha-olefin Sulfonate(AOS)+2 g/L sodium?dodecyl?benzene?sulfonate(SDBS)+0.5 g/L ?hydroxyethyl cellulose(HEC). The results showedtha the foam volume and the foam half-life timeof 100mL foaming solution prepared by Simulated formation water withsalinity of10902.1mg/L, was 700mL and 170 minutes, respectively. The salt-resistance resulted shows that when salinity varied from 0mg/L to 10902.1mg/L, the foam volume and the half-life time change a little,which indicated the formula system had good salt-resistance. The oil-resistance results showed that when oil saturation was greater than 10%, the parameters began to reduce sharply, which indicatedoil had sensitive impact on the formulasystem and diplayed the selectivity of foam on formation fluid.
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