烃组分对CO_2驱最小混相压力的影响
|
摘要
针对CO_2-EOR原油组分对混相能力影响的问题,应用界面张力消失法设计了不同碳数烃组分、不同族烃组分、不同含量烃组分混合模拟油与CO_2的最小混相压力实验,分析不同族烃组分与CO_2最小混相压力的变化规律,探寻原油中影响CO_2驱最小混相压力的关键组分。研究表明:原油中不同组分与CO_2的最小混相压力不同,相同碳数烃组分最小混相压力依次为:烷烃、环烷烃、芳香烃;同族烃的碳数越小,最小混相压力越小;相同碳数烃类的混合组分模拟油的最小混相压力小于单一烃组分的最小混相压力;原油中低碳数烷烃含量增加,最小混相压力降低,高碳数芳香烃含量增加,最小混相压力升高。该研究结果为多种类型油藏实施CO_2驱提高采收率提供了数据材料及理论支撑。
Using interfacial tension vanishing experiment,the minimum miscibility pressure of the CO_2 flooding was carried out on different simulated oil or hydrocarbons for the effects of crude oil compositions on miscibility capability in CO_2-EOR.This paper analyzes the variation law of minimum miscibility pressure of heterogeneous hydrocarbon components in CO_2 flooding,and then explores the key components which influence the minimum miscibility pressure of CO_2 flooding in crude oil.The result shows that the minimum miscibility pressure of the different component of crude oil mixed with CO_2 is different.The order of the minimum miscibility pressure of the same carbon number hydrocarbon components is:alkane,naphthenic hydrocarbon,aromatic hydrocarbon.The smaller the carbon number of the same hydrocarbon is,the smaller the minimum miscibility pressure is.The minimum miscibility pressure of the same carbon number mixed component is less than the minimum miscibility pressure of the pure hydrocarbon.As the content of low carbon alkanes in crude oil increased,the minimum miscibility pressure decreased.However,when the content of high carbon aromatic hydrocarbons increased,the minimum miscibility pressure increased.This research results supply data and theory supports for CO_2-EOR in different kinds of reservoir.
Using interfacial tension vanishing experiment,the minimum miscibility pressure of the CO_2 flooding was carried out on different simulated oil or hydrocarbons for the effects of crude oil compositions on miscibility capability in CO_2-EOR.This paper analyzes the variation law of minimum miscibility pressure of heterogeneous hydrocarbon components in CO_2 flooding,and then explores the key components which influence the minimum miscibility pressure of CO_2 flooding in crude oil.The result shows that the minimum miscibility pressure of the different component of crude oil mixed with CO_2 is different.The order of the minimum miscibility pressure of the same carbon number hydrocarbon components is:alkane,naphthenic hydrocarbon,aromatic hydrocarbon.The smaller the carbon number of the same hydrocarbon is,the smaller the minimum miscibility pressure is.The minimum miscibility pressure of the same carbon number mixed component is less than the minimum miscibility pressure of the pure hydrocarbon.As the content of low carbon alkanes in crude oil increased,the minimum miscibility pressure decreased.However,when the content of high carbon aromatic hydrocarbons increased,the minimum miscibility pressure increased.This research results supply data and theory supports for CO_2-EOR in different kinds of reservoir.
引文
[1]郭茂雷,黄春霞,董小刚,等.延长油田致密砂岩油藏CO2驱油机理研究[J].石油与天然气化工,2018,47(2):75-88.
[2]胥洪俊,孙雷,常志强.注CO2提高气藏采收率[J].天然气勘探与开发,2006(3):40-41.
[3]赵淑霞,杨永恒,马涛.油田用于CO2起泡的表面活性剂的研究现状[J].石油与天然气化工,2017,46(6):66-70.
[4]ALSTON R B,KOKOLIS G P,JAMES C F.CO2 minimum miscibility pressure:a correlation for impure CO2streams and live oil systems[J].Society of Petroleum Engineers JournalSPEJ11959,1985,25(2)pp:268-274.
[5]YELLING W F,METCALFE R S.Determination and prediction of the CO2minimum miscibility pressures[J].Journal of Petroleum Technology,1980,32(1):160-168.
[6]BON J,SARMA H K,THEOPHILOS A M.An investigation of minimum miscibility pressure for CO2-rich injection gases with pentanes-plus fraction[C]//SPE International Improved Oil Recovery Conference in Asia Pacific,5-6 December,Kuala Lumpur,Malaysia.Kuala Lumpur:Society of Petroleum EngineersSPE 97536,2005:1-6.
[7]张可.CO2与地层油体系界面特征及应用研究[D].廊坊:中国科学院研究生院(渗流流体力学研究所),2011.
[8]王利生,王钰,郎兆新.CO2与正辛烷和正十四烷最小混相压力的实验研究[J].石油大学学报(自然科学版),1995,19(增刊):937-987.
[9]杨红,余华贵.原油组分对CO2最小混相压力的影响[J].精细石油化工进展,2014,15(6):25-27.
[10]张琨,张居和,张璐,等.原油中烃类全二维气相色谱分析方法[J].大庆石油地质与开发,2013,32(5):36-40.
[11]RAO D N.A new technique of vanishing interfacial tension for miscibility determination[J].Fluid Phase Equilibria,1997,139(1-2):311-324.
[12]张可,李实,秦积舜,等.溶度差法计算地层油-CO2体系的最小混相压力[J].特种油气藏,2013,20(1):122-125.
[13]FREDERIC WERTZ,AUDIGANE P,Bouc O.CO2-thermodynamic model in a leaking well[J].Energy Procedia,2009,1(1):1791-1798.
[2]胥洪俊,孙雷,常志强.注CO2提高气藏采收率[J].天然气勘探与开发,2006(3):40-41.
[3]赵淑霞,杨永恒,马涛.油田用于CO2起泡的表面活性剂的研究现状[J].石油与天然气化工,2017,46(6):66-70.
[4]ALSTON R B,KOKOLIS G P,JAMES C F.CO2 minimum miscibility pressure:a correlation for impure CO2streams and live oil systems[J].Society of Petroleum Engineers JournalSPEJ11959,1985,25(2)pp:268-274.
[5]YELLING W F,METCALFE R S.Determination and prediction of the CO2minimum miscibility pressures[J].Journal of Petroleum Technology,1980,32(1):160-168.
[6]BON J,SARMA H K,THEOPHILOS A M.An investigation of minimum miscibility pressure for CO2-rich injection gases with pentanes-plus fraction[C]//SPE International Improved Oil Recovery Conference in Asia Pacific,5-6 December,Kuala Lumpur,Malaysia.Kuala Lumpur:Society of Petroleum EngineersSPE 97536,2005:1-6.
[7]张可.CO2与地层油体系界面特征及应用研究[D].廊坊:中国科学院研究生院(渗流流体力学研究所),2011.
[8]王利生,王钰,郎兆新.CO2与正辛烷和正十四烷最小混相压力的实验研究[J].石油大学学报(自然科学版),1995,19(增刊):937-987.
[9]杨红,余华贵.原油组分对CO2最小混相压力的影响[J].精细石油化工进展,2014,15(6):25-27.
[10]张琨,张居和,张璐,等.原油中烃类全二维气相色谱分析方法[J].大庆石油地质与开发,2013,32(5):36-40.
[11]RAO D N.A new technique of vanishing interfacial tension for miscibility determination[J].Fluid Phase Equilibria,1997,139(1-2):311-324.
[12]张可,李实,秦积舜,等.溶度差法计算地层油-CO2体系的最小混相压力[J].特种油气藏,2013,20(1):122-125.
[13]FREDERIC WERTZ,AUDIGANE P,Bouc O.CO2-thermodynamic model in a leaking well[J].Energy Procedia,2009,1(1):1791-1798.