摘要
烷基酚是一类由酚类化合物烷基化后产生的化合物,与其他非烃化合物相比,更易溶于水。文章通过不同温度(25℃、45℃和65℃)、不同盐水浓度(4000 mg/L、6000 mg/L和8000 mg/L)和不同原油类型(X37、X45和X61)的三组油水分配实验,研究了烷基酚在油水两相间的分配特征,确定了烷基酚分配系数的变化规律。研究结果表明:随着同系物烷基分子量的增加,油水分配系数也随之增加;烷基酚的油水分配系数随着温度的增加而减小,同系物烷基分子量大的对温度更加敏感;烷基酚在油水体系中的分配系数随着水相盐度的增加而升高。从实验结果来看,温度和水相的盐度均会造成烷基酚油水分配系数差异,且温度的影响要大于盐度。烷基酚在油水两相间的分配行为可以为原油的二次运移和油藏开发的水驱前缘方向判断提供更多依据。
Alkylphenols are a kind of compounds produced by alkylation of phenolic compounds.Compared with other non-hydrocarbon compounds,alkylphenols are more soluble in water.In this paper,through three groups of oil-water distribution experiments at different temperatures(25℃,45℃and 65℃),different brine concentrations(4000 mg/L,6000 mg/L and 8000 mg/L)and different crude oil types(X37,X45 and X61),the distribution characteristics of alkylphenols between oil and water were studied,and the variation law of alkylphenol distribution coefficient was determined.The results show that the oil-water partition coefficient increases with the increase of alkyl molecular weight of homologues;The oil-water partition coefficient of alkylphenols decreases with the increase of temperature,and alkyl homologues with higher molecular weights are more sensitive to temperature;The partition coefficient of alkylphenol in oil-water system increases with the increase of water salinity.According to the experimental results,temperature and salinity of water phase will cause the difference of oil-water partition coefficient of alkylphenol,and the influence of temperature is greater than that of salinity.The distribution behavior of alkylphenols between oil and water can provide more reference for the secondary migration of crude oil and the direction of water drive front in reservoir development.
作者
孙砚泽
彭晓波
文志刚
何文祥
严刚
刘栩
钟鸣
田伟超
SUN Yanze;PENG Xiaobo;WEN Zhigang;HE Wenxiang;YAN Gang;LIU Xu;ZHONG Ming;TIAN Weichao(Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Ministry of Education,Wuhan 434100,Hubei,China;Hubei Key Laboratory of Petroleum Geochemistry and Environment,Yangtze University,Wuhan 434100,Hubei,China)
出处
《地质力学学报》
CSCD
北大核心
2022年第2期217-225,共9页
Journal of Geomechanics
基金
国家自然科学基金(41872144)
中国石油科技创新基金(2020D-5007-0101)。
关键词
烷基酚
油水分配系数
油水配比
含水率
alkylphenol
oil-water partition coefficient
oil-water ratio
moisture content
