MD膜驱剂与季铵盐对油藏矿物润湿性的影响

用Washburn法对比了单分子双季铵盐MD膜驱剂、四乙基溴化铵和十六烷基三甲基溴化铵(CTAB)对油藏矿物润湿性的影响。研究结果表明，油藏矿物吸附MD膜驱剂或(Et)4NB亲水性大于CTAB，大庆、中原油砂吸附MD膜驱剂或(Et)4NB亲水性增加;油藏矿物吸附不同季铵盐亲油性大部分降低。沥青质油藏矿物(除沥青质-高岭土)吸附不同季铵盐亲油性都有增加; 油砂及沥青质油砂吸附MD膜驱剂亲油性小于(Et)4NB和CTAB,对油田的水驱和三次采油具有重要意义。

THE EFFECT OF MOLECULAR DEPOSITION FILMING FLOODING AGENT AND QUATERNARY AMMONIUM SALTS ON WETTABILITY OF OIL RESERVOIR MINERALS

Washburn method is applied to investigate the different effect of molecular deposition filming flooding agent (MDFFA), tetraethyl ammonium bromide (Et)4NB] and hexadecyl trimethyl ammonium bromide (CTAB) on the wettability of oil reservoir minerals. The results show that the oil reservoir minerals absorbed MDFFA or (Et)4NB are more hydrophilic than that of those minerals absorbed CTAB. The hydrophilicity of Daqing and Zhongyuan oil sands rises after absorbing MDFFA or (Et)4NB. The oil wettability of most oil reservoir minerals declines after they absorbed different quaternary ammonium salts. The oil wettability of asphaltene oil reservoir minerals rises after they absorb different quaternary ammonium salts (except for asphaltene kaolin). The oil wettability of Daqing and Zhongyuan oil sands treated by MDFFA before and after adsorb asphaltene are lower than that of those minerals treated by (Et)4NB or CTAB, which are of important significance to water flooding and tertiary recovery. 