系线法研究CO_2驱最小混相压力影响因素
|
摘要
原油组分和油藏温度对CO_2驱最小混相压力影响规律对于注气油藏筛选和评价具有重要意义。系线法是一种使用解析方式计算最小混相压力的方法,速度快,精确度高,操作方便。建立了系线法模拟油藏CO_2驱最小混相压力计算流程,研究了原油中C_4、C_(10)、C_(14)和C_(20)组分及温度对最小混相压力的影响规律。结果显示:系线分析法与细管数值模拟结果相近。随温度升高混相压力增加,高温时组分含量对最小混相压力敏感性更强;最小混相压力随着原油中C_4、C_(10)、C_(14)组分含量增加而减小,随C_(20)含量的增加而增大。该研究为注气最小混相压力计算及影响因素评价提供了一种流程简单、计算准确的新方法。
The minimum miscibility pressure(MMP)of CO_2 flooding is affected by crude oil components and reservoir temperature.And its influence rule has great significance to screen and evaluate gas injection reservoirs. The tie-line analysis is a method to calculate MMP analytical approach which is faster, more accurate, and easier to operate. In this paper, a calculation process of simulating CO_2 flooding by tie-line analysis was proposed, and the influence law of components(C_4, C_(10), C_(14), C_(20))and temperature on MMP was studied. The results showed that the simulation results of the tie-line analysis were similar to those of the slim tube numerical simulation. The MMP increased with the increase of temperature, and the sensitivity of MMP for each component was more obvious in higher temperature. The MMP decreased with the increase of C_4, C_(10) and C_(14) components, but increased with the increase of C_(20) component. The study proposed a new method with simple process and accurate calculation for calculating MMP and evaluating influencing factors.
The minimum miscibility pressure(MMP)of CO_2 flooding is affected by crude oil components and reservoir temperature.And its influence rule has great significance to screen and evaluate gas injection reservoirs. The tie-line analysis is a method to calculate MMP analytical approach which is faster, more accurate, and easier to operate. In this paper, a calculation process of simulating CO_2 flooding by tie-line analysis was proposed, and the influence law of components(C_4, C_(10), C_(14), C_(20))and temperature on MMP was studied. The results showed that the simulation results of the tie-line analysis were similar to those of the slim tube numerical simulation. The MMP increased with the increase of temperature, and the sensitivity of MMP for each component was more obvious in higher temperature. The MMP decreased with the increase of C_4, C_(10) and C_(14) components, but increased with the increase of C_(20) component. The study proposed a new method with simple process and accurate calculation for calculating MMP and evaluating influencing factors.
引文
[1]仵元兵,胡丹丹,常毓文,等. CO2驱提高低渗透油藏采收率的应用现状[J].新疆石油天然气,2010,6(1):36-39,54-56.
[2]汤勇,张超,杜志敏,等. CO2驱提高气藏采收率及埋存实验[J].油气藏评价与开发,2015,5(5):34-40,49.
[3]罗二辉,胡永乐,李保柱,等.中国油气田注C02提高采收率实践[J].特种油气藏,2013,20(2):1-7.
[4]汤勇,陈淑曲,孙雷,等.地层水对凝析气藏注CO2相态的影响[J].天然气工业,2016,36(5):51-57.
[5]郝敏,宋永臣.利用CO2提高石油采收率技术研究现状[J].钻采工艺,2010,33(4):59-63.
[6] Yong T, Ruizhi Y, Xiaoqiang B. A view of CO2 sequestration projects and application in China[J]. The Scientific World Journal,2014, 2014:1-11.
[7]汤勇,赵雪梅,汪洋. CO2驱最小混相压力影响因素研究[J].油气藏评价与开发,2018,8(4):42-45.
[8] Cook A B, Walker C J, Spencer G B, et al. Realistic K values of C7+ hydrocarbons for calculating oil vaporization during gas cycling at high pressures[J]. Journal of Petroleum Technology,1969, 21(7):901-915.
[9] Zick A A. A combined condensing/vaporizing mechanism in the displacement of oil by enriched gases[C]//paper SPE-15493-MS presented at the SPE Annual Technical Conference and Exhibition, 5-8 October 1986, New Orleans, Louisiana, USA.
[10] K Ahmadi Rahmatabadi. Advances in calculation of minimum miscibility pressure[D]. Austin:The University of Texas at Austin, 2011.
[11]杨学锋.油藏注气最小混相压力研究[D].成都:西南石油大学,2003.
[12]杨学锋,郭平,杜志敏.应用系线解析法计算最小混相压力[J].天然气工业,2004,24(6):98-102.
[13] Yun W, Orr F M. Analytical calculation of minimum miscibility pressure[J]. Fluid Phase Equilibria, 1997, 139(1-2):101-124.
[14] Yun W, Peck D. Analytical calculation of minimum miscibility pressure:Comprehensive testing and its application in a quantitative analysis of the effect of numerical dispersion for different miscibility development mechanisms[J]. Materials Letters, 2000,21(1):16-23.
[15] Yun W, Orr F M. Calculation of minimum miscibility pressure[J]. Journal of Petroleum Science and Engineering, 2000, 27(3-4):151-164.
[16]杨雪.尺度效应对天然气混相驱驱油效果的影响[J].油气藏评价与开发,2018,8(5):37-41.
[2]汤勇,张超,杜志敏,等. CO2驱提高气藏采收率及埋存实验[J].油气藏评价与开发,2015,5(5):34-40,49.
[3]罗二辉,胡永乐,李保柱,等.中国油气田注C02提高采收率实践[J].特种油气藏,2013,20(2):1-7.
[4]汤勇,陈淑曲,孙雷,等.地层水对凝析气藏注CO2相态的影响[J].天然气工业,2016,36(5):51-57.
[5]郝敏,宋永臣.利用CO2提高石油采收率技术研究现状[J].钻采工艺,2010,33(4):59-63.
[6] Yong T, Ruizhi Y, Xiaoqiang B. A view of CO2 sequestration projects and application in China[J]. The Scientific World Journal,2014, 2014:1-11.
[7]汤勇,赵雪梅,汪洋. CO2驱最小混相压力影响因素研究[J].油气藏评价与开发,2018,8(4):42-45.
[8] Cook A B, Walker C J, Spencer G B, et al. Realistic K values of C7+ hydrocarbons for calculating oil vaporization during gas cycling at high pressures[J]. Journal of Petroleum Technology,1969, 21(7):901-915.
[9] Zick A A. A combined condensing/vaporizing mechanism in the displacement of oil by enriched gases[C]//paper SPE-15493-MS presented at the SPE Annual Technical Conference and Exhibition, 5-8 October 1986, New Orleans, Louisiana, USA.
[10] K Ahmadi Rahmatabadi. Advances in calculation of minimum miscibility pressure[D]. Austin:The University of Texas at Austin, 2011.
[11]杨学锋.油藏注气最小混相压力研究[D].成都:西南石油大学,2003.
[12]杨学锋,郭平,杜志敏.应用系线解析法计算最小混相压力[J].天然气工业,2004,24(6):98-102.
[13] Yun W, Orr F M. Analytical calculation of minimum miscibility pressure[J]. Fluid Phase Equilibria, 1997, 139(1-2):101-124.
[14] Yun W, Peck D. Analytical calculation of minimum miscibility pressure:Comprehensive testing and its application in a quantitative analysis of the effect of numerical dispersion for different miscibility development mechanisms[J]. Materials Letters, 2000,21(1):16-23.
[15] Yun W, Orr F M. Calculation of minimum miscibility pressure[J]. Journal of Petroleum Science and Engineering, 2000, 27(3-4):151-164.
[16]杨雪.尺度效应对天然气混相驱驱油效果的影响[J].油气藏评价与开发,2018,8(5):37-41.