摘要
针对江汉油田高温高盐稀油油藏条件合成了SH系列阴-非离子表面活性剂C_(12)H_(25)O(CH_2CH_2O)_nCH_2CH(OH)CH_2SO_3Na,n值分别为5~9时对应SH01~SH05。室内评价了该系列阴-非离子表面活性剂的界面活性和耐温抗盐性能,用物理模拟方法评价了阴-非离子表面活性剂的驱油性能。研究结果表明,所合成的阴-非离子表面活性剂具有较强的耐温抗盐能力,随温度的升高或矿化度的增加,油水界面张力更低;在高矿化度(300 g/L)、高温(84℃)下,0.3%的表面活性剂SH03溶液与钟市模拟油间的界面张力能降到10^(-3)mN/m超低数量级;物模驱油实验表明,在水驱基础上(采收率52%左右),注入0.3 PV、质量分数0.3%的SH03溶液可提高采收率6%,注入0.3PV的0.3%SH03+0.3%SMG复合体系可提高采收率12.1%。在钟市油田钟10-5井区开展的表面活性剂矿场先导试验见到增油效果。
In consideration of high temperature and high salinity of the thin oil reservoirs in Jianghan Oilfield and poor performance of common surfactants under such conditions, a series of SH anionic-nonionic surfactants, C12H250（CH2CH20）nCH2CH（OH） CH2SO3Na （the SH01-SH05 was corresponding to n value of 5 - 9）, were synthesized. Their properties such as surface activity, temperature resistance, and salt tolerance were measured in laboratory, and oil displacement efficiencies were evaluated with physical models. The experimental results showed that the synthesized suffactants had fine temperature resistance and salt tolerance, and the oil-water inteffacial tension became even lower as temperature and salinity increased. The interracial tension between the oil from Zhongshi Oilfield and 0.3% SH-3 aqueous solution at high salinity of 300 g/L and high temperature of 84℃ could descend to an ultra-low order of 10.3 mN/m. The physical simulation experiments showed that when injecting 0.3 PV of the 0.3% SH-3 solution alone, oil displacement efficiency could be enhanced by 6%; while the combination flooding system （0.3% SH03 ＋0.3% SMG） could enhance the oil displacement efficiency by 12.1%. The Zhongl0-5 Wellblock in Zhongshi Oilfield was chosen to carry out the pilot test and yielded a good result of increasing oil.
出处
《油田化学》
CAS
CSCD
北大核心
2013年第3期416-419,424,共5页
Oilfield Chemistry
关键词
阴-非离子表面活性剂
界面张力
耐温抗盐
驱油实验
anionic-nonionic surfactants
interracial tension
temperature resistance and salt tolerance
displacement experiment
