文章摘要
两种石油酸对二元驱油体系关键性能的影响
The influence of two petroleum acids on the key performance of binary oil displacement system
投稿时间:2020-06-09  修订日期:2020-07-01
DOI:
中文关键词: 石油酸  界面张力  乳化  逆向分析  原料油
英文关键词: petroleum acid  interfacial tension  emulsification  reverse analysis  raw material oil
基金项目:
作者单位E-mail
王雨 新疆砾岩油藏实验室 wangchemistry@163.com 
吴永花 新疆砾岩油藏实验室  
林莉莉 新疆砾岩油藏实验室  
于文芳 新疆砾岩油藏实验室  
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中文摘要:
      为明确原油中石油酸对复合驱油体系界面张力和乳化性能的作用规律,测试了两种石油酸的分子量分布,并研究对二元驱油体系(SP)动态界面张力和乳状液稳定性的影响。结果表明,1#酸碳数分布多在10-15之间,2#酸碳数分布多在10-25之间;700 mg/L的大分子量2#石油酸可使平衡界面张力(IFTeq)降为0.021mN/m,而同浓度小分子量的1#石油酸仅能使IFTeq降为0.095 mN/m,混合酸对降低界面张力有正向协同作用,欲使SP体系达到超低界面张力,两种石油酸缺一不可。破乳实验进一步表明,含酸体系乳液稳定性与动态界面张力相关联,含2#酸的油水乳状液体系,因平衡界面张力较低,乳液的最终稳定较高。通过对二元驱体系性能-原料的逆向分析,指出合成二元驱用磺酸盐的原料油中可以增加一定量的石油酸来增加SP体系的乳化性能,获得较好的降低界面张力效果。
英文摘要:
      To clarify the law of petroleum acid on the key performance of the binary displacement system,the molecular weight distribution of two kinds of petroleum acid was tested, and the influence on dynamic interfacial tension and emulsion stability of binary oil displacement system (SP) were studied. The results showed that the number of 1# petroleum acid was mostly distributed between 10 and 15, while the 2# was mostly between 10 and 25. The 2# petroleum acid with high molecular weight of 700 mg/L could reduce the equilibrium interfacial tension (IFTeq) to 0.021mN/m, while the 1# with low molecular weight at the same concentration could only reduce IFTeq to 0.095 mN/m. The mixed acid had a positive synergistic effect on reducing interfacial tension. In order to achieve ultra-low interfacial tension in SP system, one of the two petroleum acids is indispensable. Demulsification experiments further showed that the stability of the acid-containing system emulsion was related to the dynamic interfacial tension, and the final stability of the oil-water emulsion system containing 2# acid was higher due to the low equilibrium interfacial tension. Through the reverse analysis from the performance to raw materials, it was pointed out that we should add a certain amount of petroleum acid to the raw material oil for the synthesis of sulfonate to increase the emulsification performance and obtain a better effect of reducing interfacial tension.
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