摘要
以亚硫酸氢钠、环氧氯丙烷、烷基二甲基叔胺等为原料,合成了4种烷基羟基磺基甜菜碱表面活性剂,利用红外光谱验证了产物的化学组成,评价了表面活性剂的界面性能、耐温以及耐盐性能,复配研发了耐高温高盐的活性体系配方,通过驱替实验评价了复配体系对不同渗透率低渗岩心的降压增注及提高采收率效果。结果表明,碳链长度为14的羟基磺基甜菜碱表面活性剂界面性能最好,与史深100区块原油的界面张力最低可达0.2mN/m;且具有非常好的耐温耐盐性,耐温130℃,耐盐200g/L;质量分数为0.072 4%的十四烷基羟基磺基甜菜碱和0.006%的季铵盐表面活性剂BDT-14,与原油的界面张力可达0.003mN/m。该配方对气测渗透率为5.02×10^(-3)μm2和42.15×10^(-3)μm^2的低渗岩心,分别可以提高采收率8.41%和15.02%,降低注入压力10.62%和29.17%,且没有发生明显的色谱分离现象。
With sodium bisulfate and epichlorohydrin as raw materials, the intermediate 3-chloro-2-hy- droxy propane sodium sulfonate was firstly obtained, and then the object product hydroxysulfobetaine was synthesized. The chemical composition of the product was verified by infrared spectrum. The in- terfacial properties, temperature resistance and salt resistance of the surfactants were evaluated. By compounding the surfactant formula was developed. Using low permeability cores with different per- meability, the influences of surfactant formula on reducing injection pressure and enhancing oil recov- ery were studied. Results showed that interfacial tension of the surfactant TCJ-14 which the length of carbon chain was the lowest, and the minimum value was 0.2 mN/m. It has good abilities of tolera- ting salt and resisting high temperature. Temperature resistance was up to 130 ℃, salt resistance ca- pacity was up to 200 g/L. If 0. 072 4% TCJ-14 mixed with quaternary ammonium salt surfactant of 0.006 % BDT-14, the interracial tension could decrease to 0.003 mN/m, which showed good synergistic effect. The formula could respectively increase oil recovery by 8.41% and 15.02 %and could re- spectively reduce injection pressure by 10.62% and 29.17%, with low permeability cores for gas per- meability of 5.02×10^-3 μm^2 and 42. 15×10^-3 μm^2. There was no obvious phenomenon of chromatographic separation.
出处
《精细石油化工》
CSCD
北大核心
2017年第5期1-5,共5页
Speciality Petrochemicals
基金
中国博士后科学基金资助项目(2014M561961)
国家科技重大专项(2016ZX05040-005)
关键词
烷基羟基磺基甜菜碱
表面活性剂
低渗油藏
注入压力
alkyl hydroxysulfobetaine
surfactant
low-permeability reservoir
rejection pressure
作者简介
赵琳（1984-），女，博士，高级工程师，主要从事油田化学、提高采收率等方面的研究。E-mail；zhailinshiyou@126．com
