DLF低张力泡沫体系的耐温抗盐性能评价

Temperature Resistance and Salt Tolerance Performance of DLF Low Tension Foam System

李 冉 李兆敏 冉启全 李松岩 童 敏 李金洋

LI Ran LI Zhaomin RAN Qiquan LI Songyan TONG Min LI Jinyang

利用Waring Blender方法对低张力起泡剂DLF在高温、高矿化度条件下的起泡能力和稳定性等静态性能进行了评价，并在此基础上通过一维岩心封堵实验研究了DLF低张力泡沫体系在高温、高矿化条件下的动态封堵调剖性能。实验结果表明，DLF低张力泡沫体系具有很好的耐温抗老化性能，该体系在80℃左右具有最佳的静态起泡性能和动态封堵调剖能力，且在温度达到180℃时，DLF低张力泡沫阻力因子值仍可达到18左右；同时，该体系具有很好的动静态抗盐能力，并对Ca2+和Mg2+均具有一定的适应性，其敏感程度由强到弱依次为：Mg2+（40 mg/L）、Ca2+（600 mg/L）和Na+（28000 mg/L）。图7参15

The static performances of foaming agent DLF, including foamability, stability, were tested and evaluated using the method of Waring Blender, and on this basis the dynamic plugging and profile control ability was studied through one-dimensional core flow experiments. The results showed that, the DLF system had great heat-resistant and aging-resistant performances, and the static foamability and dynamic plugging and profile control abilities of the whole system were best under 80℃, what’s more, the foam resistance factor of the DLF system was still about 18 when the temperature reached up to 180℃; at the same time, its static salt tolerance performance was also very good, and the DLF system was tolerant to Ca2+ and Mg2+ at certain concentration, correspondingly for the whole system，the sensitivity order from strong to weak was: Mg2+ (40 mg/L), Ca2+ (600 mg/L) and Na+ (28000 mg/L).