油和水中烷基酚分配模式研究:基于油水梯度配比实验  

Study on alkylphenol distribution model in oil and water:Based on oil—water gradient ratio experiment

作　　者：彭晓波[1,2] 孙砚泽 文志刚 何文祥[1] 刘岩[1] 王宁[1] 严刚[1] 刘栩 钟鸣 高永亮 PENG Xiaobo;SUN Yanze;WEN Zhigang;HE Wenxiang;LIU Yan;WANG Ning;YAN Gang;LIU Xu;ZHONG Ming;GAO Yongliang(Hubei Key Laboratory of Petroleum Geochemistry and Environment,Yangtze University,Wuhan,430100;Key Laboratory of Exploration Technologies for Oil and Gas Resources,Yangtze University,Ministry of Education,Wuhan,430100;Exploration and Development Research Institute of Jidong Oilfield Company,PetroChina,Tangshan,Hebei,063000)

机构地区：[1]油气地球化学与环境湖北省重点实验,长江大学,武汉430100 [2]油气资源与勘探技术教育部重点实验室,长江大学,武汉430100 [3]中国石油冀东油田勘探开发研究院,河北唐山063000

出　　处：《地质论评》2022年第3期1145-1152,共8页Geological Review

基　　金：自然科学基金资助项目“油—水—岩体系中酚类化合物分配规律及其应用研究”(编号:41872144)的成果。

摘　　要：原油中酚类化合物在水驱过程中随着含水率上升具有极强的“敏感性”,这一特征暗示酚类化合物在油相和水相中分配行为差别明显,对该规律的认识,有望根据酚类含量的变化判断油藏中水驱前缘的方向。笔者等通过研究油水梯度配比实验后的酚类化合物的分配特征,确定烷基酚在原油和水中的分配规律并计算得到烷基酚的油—水分配系数:苯酚的油—水分配系数为1. 98,C_(1)烷基酚的平均油—水分配系数大小为4. 60;C_(2)烷基酚平均油—水分配系数为12. 82;C_(3)烷基酚油—水分配系数平均值为54. 69。实验结果表明,原油中烷基酚的含量随着含水率的增加而下降,并且C_(1)烷基酚对含水率具有较高的敏感性,其中间甲基酚与对甲基酚变化尤为明显。根据实验结果并结合前人的研究提出了一种烷基酚在油和水之间分配的理论模式,用于描述不同水/油比率中的烷基酚的分配规律。根据分配模式可知,具有不同油—水分配系数的烷基酚异构体在原油和水之间的分配存在差异,这种差异随着水/油比率的增加而呈现先扩大后缩小的趋势,原油中的烷基酚最终含量都趋近于零。该分配模式能拓展油藏地球化学的研究领域,以期在油田注水开发中发挥重要作用。Objectives: Expand the research field of phenolic compounds in reservoir geochemistry in order to play an important role in oilfield water injection development.Methods:To establish a separation and identification method for alkylphenol,the partition coefficient of phenolic compounds are calculated to establish the water oil ratio model.Results:The oil/water partition coefficient of phenol is 1.98,and the average oil/water partition coefficient of C_(1) alkylphenol is 4.60;The average oil/water partition coefficient of C_(2) alkylphenol is 12.82;The average value of C_(3) alkylphenol oil/water partition coefficient is 54.69.Conclusions:The oil—water gradient ratio experiment shows that the concentration of alkylphenol in crude oil gradually decreases with the increase of water content,and the concentration of C_(1) alkylphenol in D34 crude oil is low,which makes them more sensitive to water content than other alkylphenols,and there is an obvious correlation between m-cresol and p-cresol and water content,which has the potential application to indicate the water content in D34 crude oil.At the same time,this experiment also confirmed that there was a significant correlation between the oil/water partition coefficient of alkylphenol and the number of alkyl carbon;As the molecular weight of alkylphenol increases,the oil/water partition coefficient of alkylphenol increases gradually.Based on previous studies,a distribution model of alkylphenol series compounds was established.Under the ideal condition that the model is limited to the interaction between oil and water,the water oil ratio in the process of crude oil migration can be calculated by detecting the concentration and partition coefficient of alkylphenol.

关 键 词：烷基酚 水/油比率 油—水分配系数 油水梯度配比 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]