层状盐岩小井间距双井水溶造腔流场相似模拟研究
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摘要
为解决层状盐岩单井水溶造腔过程中建槽周期长,提管工艺复杂等问题,开展层状盐岩小井间距双井水溶造腔技术研究。拟采用选定物理法建立相似试验平台,探讨小井间距双井水溶造腔流场及浓度场特征,揭示双井水溶溶腔腔体扩展与流场的联系。结果表明:双井水溶造腔过程中腔体流场可以划分为4个区域:边界溶蚀区、浮羽流区、对流扩散区和底部饱和区,各个区域相互影响。浮羽流区是驱动流体运移的关键区域,根据浮羽流区流场特征建立相应的流场模型;根据宏观流动特征,对流扩散区分为强扩散区和弱扩散区;边界溶蚀区对双井水溶溶腔腔体扩展有显著影响;饱和区示踪特征不明显但浓度分层明显。通过对比分析双井造腔和单井造腔模型试验结果,发现双井水溶造腔工艺有利于盐穴建槽期,研究为小井间距双井水溶造腔技术的应用提供一定的理论基础,对盐穴储气库的优化建造具有重要意义。
In order to solve the issues during the construction of the water-soluble single well bedded rock salt cavern,including the long trough period,the complex stripping tube process etc.,the technology of the water-soluble cavity for double well with horizontal well spacing was studied.A similar experimental platform was proposed to establish a physical method.The characteristics of the flow field and concentration field of the water-soluble cavity in the well spacing were discussed,which revealed the relationship between the cavity expansion and the flow field in double well water soluble cavity.The results showed that the cavity flow field was divided into four regions:the boundary eroded area,the floating plume area,the convective diffusion area,and the bottom saturated zone.And different regions influenced each other.The floating plume area was the key area to drive the flow field of the cavity,and the corresponding flow field model was established according to the flow field characteristics of the plume.According to the macroscopic flow characteristics,the convective diffusion was divided into strong diffusion region and weak diffusion region;the boundary dissolution region had a significant effect on the cavity expansion of the double well water soluble cavity.The tracer characteristics of the saturated zone were not obvious while the concentration stratification shows the opposite.By comparing and analyzing the results of double well cavity and single well cavity model,it was found that the process of double well water soluble cavity could be beneficial to the construction of salt hole.The study provides a theoretical basis for the application of water well in the well spacing,which is of great significance to optimize the construction of salt cavern gas storage.
In order to solve the issues during the construction of the water-soluble single well bedded rock salt cavern,including the long trough period,the complex stripping tube process etc.,the technology of the water-soluble cavity for double well with horizontal well spacing was studied.A similar experimental platform was proposed to establish a physical method.The characteristics of the flow field and concentration field of the water-soluble cavity in the well spacing were discussed,which revealed the relationship between the cavity expansion and the flow field in double well water soluble cavity.The results showed that the cavity flow field was divided into four regions:the boundary eroded area,the floating plume area,the convective diffusion area,and the bottom saturated zone.And different regions influenced each other.The floating plume area was the key area to drive the flow field of the cavity,and the corresponding flow field model was established according to the flow field characteristics of the plume.According to the macroscopic flow characteristics,the convective diffusion was divided into strong diffusion region and weak diffusion region;the boundary dissolution region had a significant effect on the cavity expansion of the double well water soluble cavity.The tracer characteristics of the saturated zone were not obvious while the concentration stratification shows the opposite.By comparing and analyzing the results of double well cavity and single well cavity model,it was found that the process of double well water soluble cavity could be beneficial to the construction of salt hole.The study provides a theoretical basis for the application of water well in the well spacing,which is of great significance to optimize the construction of salt cavern gas storage.
引文
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[18]Jiang Deyi,Yi Liang,Chen Jie,et al.Similar experiments on the concentration field of bedded salt cavern[J].Journal of Sichuan University(Engineering Science Edition),2014,46(5):14-21.[姜德义,易亮,陈结,等.含夹层盐穴建腔期浓度场相似试验[J].四川大学学报(工程科学版),2014,46(5):14-21.]
[19]Ren Song,Chen Jie,Jiang Deyi,et al.Similar experiments of the flow field in cavity construction period of underground enemy storage[J].Journal of Chongqing University,2012,35(5):103-106.[任松,陈结,姜德义,等.能源地下储库造腔期流场相似实验[J].重庆大学学报,2012,35(5):103-106.]
[20]Chen Jie,Jiang Deyi,Liu Chun,et al.Analysis on the relationship of interlayer and brine migration in salt cavern construction period[J].Journal of Chongqing University,2012,35(7):107-113.[陈结,姜德义,刘春,等.盐穴建造期夹层与卤水运移相互作用机理分析[J].重庆大学学报,2012,35(7):107-113.]
[21]Nolen J S.Numerical simulation of the solution mining process[C]//Proceedings of SPE-European Spring Meeting.Dallas,1974.
[22]Yi Liang.The well space Shuangjing water soluble of cavity making mechanism and stability[D].Chongqing:Chongqing University,2016.[易亮.小井间距双井水溶造腔机理及稳定性研究[D].重庆:重庆大学,2016.]
[23]江守一郎.模型实验的理论和应用[M].郭延伟,李安定,译.北京:科学出版社,1986.
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[25]富永政英.海洋波动基础理论和观测成果[M].关孟儒,译.北京:科学出版社,1984.
[2]Zhou Junchi,Huang Mengyun,Ban Fansheng,et al.The present situation and difficult analysis of double well cavity technology in the salt cavitation reservoir[J].Journal of Chongqing University of Science and Technology(Natural Science),2016,18(1):63-67.[周俊驰,黄孟云,班凡生,等.盐穴储气库双井造腔技术现状及难点分析[J].重庆科技学院学报(自然科学版),2016,18(1):63-67.]
[3]Saberian A.Accomplishments of SMRI sponsored salt dissolution research since the fourth salt symposium[C].The Fifth International Salt Symposium.Hamburg,1978.
[4]Durie R W,Jessen F W.Mechanism of dissolution of salt in the formation of underground salt cavities[J].Society of Petroleum Engineers Journal,1964,4(2):183-190.
[5]Saberian A,Podio A L.The horizontal penetration of buoyant jet stream in brine[R].Pennsylvania:Solution Mining Research Institure File 76-0003-SMRI,1976.
[6]Jessen F W.Salt dissolution under turbulent flow conditions[R].Pennsylvania:Solution Mining Research Institutive file70 -0004-SMRI,1970.
[7]Husband W H,Shook C A.An experiment study of free convention mass transfer from high vertical surfaces to liquids[C]//Paper in Third Symposium on Sale.Cleveland,1969.
[8]Chang C,Vliet G C,Saberian A.Natural convection mass transfer at salt-brine interfaces[J].Journal of Heat Transfer1997,99:603-608.
[9]Kazemi H,Jessen F W.Mechanism of flow and controlled dissolution of salt in solution mining[J].Society of Petroleum Engineering Journal,1964,4(4).http://doi.org/10.2118/1007-PA.
[10]Jiang D,Jie C,Liu J P.Experimental research on acoustic and dissolved properties of stress damaged salt rock[J].Rock and Soil Mechanics,2009,30(12):3569-3573.
[11]Huo Yan.Experimental study and numerical simulation of flow field in cavity construction period of gas storage of salt rock[D].Chongqing:Chongqing University,2010.[霍琰.盐岩储气库建腔期流场实验研究及数值模拟[D].重庆:重庆大学,2010.]
[12]Li Yinping,Shi Xinlin,Liu Wei,et al.The study on the kinematics and application of insoluble materials in the construction of aqueous cavity of saltwater insoluble cavity[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(1):23-31.[李银平,施锡林,刘伟,等.盐穴水溶造腔建槽期不溶物运动性态及应用研究[J].岩石力学与工程学报,2016,35(1):23-31.]
[13]Chen Feng,Yang Haijun,Yang Chunhe.Analysis of residual brine of salt rock gas storage during injecting gas to eject brine[J].Rock and Soil Mechanics,2009,30(12):3602-3606.[陈锋,杨海军,杨春和.盐岩储气库注气排卤期剩余可排卤水分析[J].岩土力学,2009,30(12):3602-3606.]
[14]Liu C L,Xu L J,Xian X F.Experimental and theoretic research on unfree inundation water efflux flow field and circular field in rock salt well water-mining[J].Journal of Chongqing University,2006,29(6):120-123.
[15]Wu Chengsheng,Yang Junliu.Mathematical model of solution mining with single well convection method[J].Mechanics and Practice,2003,25(1):11-13.[吴乘胜,杨骏六.单井对流法水溶采矿的数学模型[J].力学与实践,2003,25(1):11-13.]
[16]Zhao Zhicheng,Zhu Weiyao,Shan Wenwen,et al.Research on mechanism of solution mining for building underground gas storage in salt cavern[J].Petroleum Exploration and Development,2003,30(5):107-109.[赵志成,朱维耀,单文文,等.盐穴储气库水溶建腔机理研究[J].石油勘探与开发,2003,30(5):107-109.]
[17]Zhao Zhicheng,Zhu Weiyao,Shan Wenwen,et al.Mathematical model of chamber building with water solution for gas storages in salt beds[J].Natural Gas Industry,2004,24(9):126-129.[赵志成,朱维耀,单文文,等.盐岩储气库水溶建腔数学模型研究[J].天然气工业,2004,24(9):126-129.]
[18]Jiang Deyi,Yi Liang,Chen Jie,et al.Similar experiments on the concentration field of bedded salt cavern[J].Journal of Sichuan University(Engineering Science Edition),2014,46(5):14-21.[姜德义,易亮,陈结,等.含夹层盐穴建腔期浓度场相似试验[J].四川大学学报(工程科学版),2014,46(5):14-21.]
[19]Ren Song,Chen Jie,Jiang Deyi,et al.Similar experiments of the flow field in cavity construction period of underground enemy storage[J].Journal of Chongqing University,2012,35(5):103-106.[任松,陈结,姜德义,等.能源地下储库造腔期流场相似实验[J].重庆大学学报,2012,35(5):103-106.]
[20]Chen Jie,Jiang Deyi,Liu Chun,et al.Analysis on the relationship of interlayer and brine migration in salt cavern construction period[J].Journal of Chongqing University,2012,35(7):107-113.[陈结,姜德义,刘春,等.盐穴建造期夹层与卤水运移相互作用机理分析[J].重庆大学学报,2012,35(7):107-113.]
[21]Nolen J S.Numerical simulation of the solution mining process[C]//Proceedings of SPE-European Spring Meeting.Dallas,1974.
[22]Yi Liang.The well space Shuangjing water soluble of cavity making mechanism and stability[D].Chongqing:Chongqing University,2016.[易亮.小井间距双井水溶造腔机理及稳定性研究[D].重庆:重庆大学,2016.]
[23]江守一郎.模型实验的理论和应用[M].郭延伟,李安定,译.北京:科学出版社,1986.
[24]余常昭.环境流体力学导论[M].北京:清华大学出版社.1992.
[25]富永政英.海洋波动基础理论和观测成果[M].关孟儒,译.北京:科学出版社,1984.