流体组成对凝析气藏流体相态的影响及意义
|
摘要
凝析气藏流体相态的研究一直是凝析气藏研究的核心问题,流体组成是影响其流体相态最根本的因素。通过单一变量法,运用PR状态方程计算模拟了典型凝析气藏流体中CH_4、C_(2-5)、C_(7+)以及CO_2等组分对凝析气藏流体相态的影响。研究发现,随着凝析气藏中CH_4含量的增多,流体饱和压力增大而临界温度和临界压力都在降低;C_(2-5)含量上升时,临界点变化不大,但流体饱和压力降低显著,这一性质给凝析气藏提高采收率提供了新思路;C_(7+)含量的上升会导致饱和压力降低,同时临界温度和临界压力显著上升,不利于凝析气藏的开采;CO_2含量的增多不仅可以降低饱和压力,同时可以有效降低临界温度和临界压力,这对凝析气藏的开发具有重要意义。
It is a key problem that the fluid phase behavior of gas condensate reservoir,the fluid composition is the fundamental factors that controls the fluid phase.By the single variable method,use the equation of state of PR,the effect of CH_4、C_(2-5)、C_(7+) and CO_2 on fluid phase behavior of gas condensate was studied.The studies have shown that if the content of CH_4 was raised the fluid saturation pressure will increase and the critical temperature and pressure decrease.The C_(2-5) content increase will let the saturation pressure rise obviously and the critical point changes slightly which provides a new way for development of gas condensate reservoir.The increasing of C_(7+) content could led the decreasing of fluid saturation pressure but the critical temperature and pressure will increase so that will reduce the recovery ratio of reservoir.The increase of CO_2 content could reduce the saturation pressure and critical temperature and pressure that could beneficial the recovery ratio of reservoir greatly.
It is a key problem that the fluid phase behavior of gas condensate reservoir,the fluid composition is the fundamental factors that controls the fluid phase.By the single variable method,use the equation of state of PR,the effect of CH_4、C_(2-5)、C_(7+) and CO_2 on fluid phase behavior of gas condensate was studied.The studies have shown that if the content of CH_4 was raised the fluid saturation pressure will increase and the critical temperature and pressure decrease.The C_(2-5) content increase will let the saturation pressure rise obviously and the critical point changes slightly which provides a new way for development of gas condensate reservoir.The increasing of C_(7+) content could led the decreasing of fluid saturation pressure but the critical temperature and pressure will increase so that will reduce the recovery ratio of reservoir.The increase of CO_2 content could reduce the saturation pressure and critical temperature and pressure that could beneficial the recovery ratio of reservoir greatly.
引文
[1]李小地.凝析气藏的成因类型与成藏模式[J].地质论评,1998,44(2):200.
[2]郑小敏,钟立军,严文德,等.凝析气藏开发方式浅析[J].特种油气藏,2008,15(6):59~61,98.
[3]侯大力,高黎惠,刘浩成,等.近临界态凝析气藏地层流体特殊相态行为[J].天然气工业,2013,33(11):68~73.
[4]赵子刚,赵天奉,郑威.确定凝析气藏相态特征和气井产量预测的方法[J].石油学报,2001,22(2):49~55,122.
[5]郭平,孙雷,宋文杰,等.凝析气藏相态恢复理论研究[J].西南石油学院学报,2001,23(2):25~29.
[6]胡永乐,罗凯,郑希潭,等.高含蜡凝析气相态特征研究[J].石油学报,2003,24(3):61~63.
[7]靳烨.凝析气藏相态实验及计算方法研究[D].东北石油大学,2012.
[8]刘长林,张茂林,梅海燕,等.凝析气藏流体相态及其影响因素[J].新疆石油天然气,2007,3(3):62~66,104.
[9]侯大力.近临界凝析气藏注CO2提高采收率机理及埋存研究[D].西南石油大学,2014.
[10]阮洪江.高含凝析油凝析气藏注CO2提高采收率可行性研究[D].西南石油大学,2015.
[11]余华杰.CO2对凝析气藏相态特征及开发指标的影响[J].东北石油大学学报,2014,38(2):86~90.
[12]先小洪.异常高压凝析气藏相态特征实验研究[D].西南石油大学,2010.
[13]Pedersen K S,Blilie A L,Meisingset K K.PVT calculations on petroleum reservoir fluids using measured and estimated compositional data for the plus fraction[J].Industrial&engineering chemistry research,1992,31(5):1378~1384.
[14]Manafi H,Mansoori G A,Ghotbi S.Phase behavior prediction of petroleum fluids with minimum characterization data[J].Journal of Petroleum Science and Engineering,1999,22(1):67~93.
[15]Pedersen K S,Christensen P L.Fluids in hydrocarbon basins[J].Reviews in Mineralogy and Geochemistry,2007,65(1):241~258.
[16]Peng D-Y,Robinson D B.A new twoconstant equation of state[J].Industrial&Engineering Chemistry Fundamentals,1976,15(1):59~64.
[17]孙龙德,宋文杰,江同文.塔里木盆地牙哈凝析气田循环注气开发研究[J].中国科学(D辑:地球科学),2003,(2):177~182.
[18]焦玉卫,谢伟,邸宝智,等.凝析气藏循环注气过程流体相态特征[J].新疆石油地质,2012,(6):704~707.
[19]朱忠谦.牙哈凝析气藏二次注气抑制反凝析机理及相态特征[J].天然气工业,2015,(5):60~65.
[20]郭平,孙良田,李士伦,等.CO2注入对原油高压物性影响的理论模拟和实验研究[J].天然气工业,2000,20(2):76~79.
[21]潘毅,孙雷,李士伦,等.凝析气藏解除反凝析污染,提高气井产能方法[J].西南石油大学学报,2007,29(2):37~40.
[22]付德亮,周世新,李靖,等.煤系有机质演化过程中CO2对流体粘度的影响[J].天然气地球科学,2015,26(6):1086~1094.
[23]付德亮,周世新,马瑜,等.煤系有机质演化过程中CO2对流体密度的影响[J].岩性油气藏,2016,(2):41~46,63.
[2]郑小敏,钟立军,严文德,等.凝析气藏开发方式浅析[J].特种油气藏,2008,15(6):59~61,98.
[3]侯大力,高黎惠,刘浩成,等.近临界态凝析气藏地层流体特殊相态行为[J].天然气工业,2013,33(11):68~73.
[4]赵子刚,赵天奉,郑威.确定凝析气藏相态特征和气井产量预测的方法[J].石油学报,2001,22(2):49~55,122.
[5]郭平,孙雷,宋文杰,等.凝析气藏相态恢复理论研究[J].西南石油学院学报,2001,23(2):25~29.
[6]胡永乐,罗凯,郑希潭,等.高含蜡凝析气相态特征研究[J].石油学报,2003,24(3):61~63.
[7]靳烨.凝析气藏相态实验及计算方法研究[D].东北石油大学,2012.
[8]刘长林,张茂林,梅海燕,等.凝析气藏流体相态及其影响因素[J].新疆石油天然气,2007,3(3):62~66,104.
[9]侯大力.近临界凝析气藏注CO2提高采收率机理及埋存研究[D].西南石油大学,2014.
[10]阮洪江.高含凝析油凝析气藏注CO2提高采收率可行性研究[D].西南石油大学,2015.
[11]余华杰.CO2对凝析气藏相态特征及开发指标的影响[J].东北石油大学学报,2014,38(2):86~90.
[12]先小洪.异常高压凝析气藏相态特征实验研究[D].西南石油大学,2010.
[13]Pedersen K S,Blilie A L,Meisingset K K.PVT calculations on petroleum reservoir fluids using measured and estimated compositional data for the plus fraction[J].Industrial&engineering chemistry research,1992,31(5):1378~1384.
[14]Manafi H,Mansoori G A,Ghotbi S.Phase behavior prediction of petroleum fluids with minimum characterization data[J].Journal of Petroleum Science and Engineering,1999,22(1):67~93.
[15]Pedersen K S,Christensen P L.Fluids in hydrocarbon basins[J].Reviews in Mineralogy and Geochemistry,2007,65(1):241~258.
[16]Peng D-Y,Robinson D B.A new twoconstant equation of state[J].Industrial&Engineering Chemistry Fundamentals,1976,15(1):59~64.
[17]孙龙德,宋文杰,江同文.塔里木盆地牙哈凝析气田循环注气开发研究[J].中国科学(D辑:地球科学),2003,(2):177~182.
[18]焦玉卫,谢伟,邸宝智,等.凝析气藏循环注气过程流体相态特征[J].新疆石油地质,2012,(6):704~707.
[19]朱忠谦.牙哈凝析气藏二次注气抑制反凝析机理及相态特征[J].天然气工业,2015,(5):60~65.
[20]郭平,孙良田,李士伦,等.CO2注入对原油高压物性影响的理论模拟和实验研究[J].天然气工业,2000,20(2):76~79.
[21]潘毅,孙雷,李士伦,等.凝析气藏解除反凝析污染,提高气井产能方法[J].西南石油大学学报,2007,29(2):37~40.
[22]付德亮,周世新,李靖,等.煤系有机质演化过程中CO2对流体粘度的影响[J].天然气地球科学,2015,26(6):1086~1094.
[23]付德亮,周世新,马瑜,等.煤系有机质演化过程中CO2对流体密度的影响[J].岩性油气藏,2016,(2):41~46,63.