聚合物驱油微观渗流机理数值模拟研究
|
摘要
针对聚合物区别于牛顿流体特有的黏弹性建立模拟实验,为了准确描述聚合物溶液的流变性,采用Maxwell上随体本构方程来控制流体特性;建立了聚合物在微观水湿毛细管中流动的物理模型;最后使用CFD软件对模型进行数值分析。由数值模拟结果得到了聚合物流动的压力场、应力场、速度场,研究了聚合物驱替油滴时的变化状态。从而能够通过压力、应力、速度的场图变化,更加直观的认识到聚合物驱油过程中,黏弹性流体特有的弹性在挤压碰撞过程中,增大驱替液对残余油的波及体积,使原先不能流动的油流动。其研究成果可进一步完善聚合物驱油微观渗流理论。
A simulation experiment is carried out for polymers which are different from the viscoelasticity of Newtonian fluids.In order to describe the rheology of polymer solution accurately,the constitutive equation of Maxwell is used to control the fluid characteristics.What's more,aphysical model of polymer solution flowing in the micro water-wet capillary is established.Finally,CFD software was used to carry out numerical analysis of the model.The pressure fields,stress fields and velocity fields of polymer flow are obtained by numerical simulation,and the change state of polymer flooding is studied.Through pressure,stress,velocity field changes,we can intuitively realize that in the process of polymer flooding,the unique elasticity of the viscoelastic fluid increases the volume of the residual oil by the displacement fluid during the extrusion collision,and makes the original flow of oil flow.The research results can further improve the polymer flooding microscopic seepage theory.
A simulation experiment is carried out for polymers which are different from the viscoelasticity of Newtonian fluids.In order to describe the rheology of polymer solution accurately,the constitutive equation of Maxwell is used to control the fluid characteristics.What's more,aphysical model of polymer solution flowing in the micro water-wet capillary is established.Finally,CFD software was used to carry out numerical analysis of the model.The pressure fields,stress fields and velocity fields of polymer flow are obtained by numerical simulation,and the change state of polymer flooding is studied.Through pressure,stress,velocity field changes,we can intuitively realize that in the process of polymer flooding,the unique elasticity of the viscoelastic fluid increases the volume of the residual oil by the displacement fluid during the extrusion collision,and makes the original flow of oil flow.The research results can further improve the polymer flooding microscopic seepage theory.
引文
[1]Guo W K,Sui X G,Yao Y M.Design and application of first polymer flooding industrial pilot test in Daqing oilfield[M].Beijing:Petroleum Industry Press,2001.
[2]Cheng H J,Gu H J,Lou L G,et al.Project design of polymer flooding in conglomerate reservoir in seven zone of Karamay oilfield[J].Xinjiang Petroleum Geology,2009,30(5):609-612.
[3]王德民,程杰成,杨清彦.粘弹性聚合物溶液能够提高岩心的微观驱油效率[J].石油学报,2000,21(5):45-51.Wang D M,Cheng J C,Yang Q Y,et al.Viscous-elastic polymer canincrease micro-scale displacement efficiency in cores[J].Acta Petrolei Sinica,2000,21(5):45-51.
[4]王德民,程杰成,吴军政,等.聚合物驱油技术在大庆油田的应用[J].石油学报,2005,26(1):74-78.Wang D M,Cheng J C,Wu J Z,et al.Application of polymer flooding technology in Daqing oilfield[J].Acta Petrolei Sinica,2005,26(1):74-78.
[5]王德民,程杰成,夏惠芬,等.粘弹性流体平行于界面的力可以提高驱油效率[J]石油学报,2002,23(5):48-52.Wang D M,Cheng J C,Xia H F,et al.Improvement of displacement efficiecy of cross by driving forces parallel to the oilwater interface of viscous-elastic fluids[J].Acta Petrolei Sinica,2002,23(5):48-52.
[6]Yin H J,Fu C Q,Lyu Y P.An unsteady seepage flow model of visco-elastic polymer solution[J].Journal of Hydrodynamics,Ser.B,2004,16(2):209-215.
[7]黄延章,于大森,张桂芳.聚合物驱油微观机理研究[J].油田化学,1990,7(1):57-60.Huang Y Z,Yu D S,Zhang G F.Microscopic mechanisims of oil displacement by polymer solution[J].Oilfield Chemistry,1990,7(1):57-60.
[8]夏惠芬,王德民,刘仲春,等.粘弹性聚合物溶液提高微观驱油效率的机理研究[J].石油学报,2001,22(4):60-65.Xia H F,Wang D M,Liu Z C,et al.Study on the mechanism of polymer solution solution with viscoelastic behavior increasing microscopic oil displace-ment efficiency[J].Acta Petrolei Sinica,2001,22(4):60-65.
[9]夏惠芬,王德民,侯吉瑞,等.黏弹性聚合物溶液对驱油效率的影响[J].大庆石油学院学报,2002,26(2):109-111.Xia H F,Wang D M,Hou J R,et al.Quantitative description of contribution of elasticity of polymer solution to oil displacement efficiency[J].Journal of China University of Petroleum,2002,26(2):109-111.
[10]李华斌.大庆油田缔合聚合物提高驱油效率及机理研究[D].成都:西南石油学院,2004.
[11]王刚,王德民,夏惠芬,等.聚合物溶液的黏弹性对残余油膜的作用[J].大庆石油学院学报,2007,31(1):25-30.Wang G,Wang D M,Xia H F,et al.Effect of viscoelasticity of HPAM solution on residual oil film[J].Journal of Daqing Petroleum Institute,2007,31(1):25-30.
[12]刘丽丽.黏弹性流体在微孔道中流动的数值计算[D].大庆:大庆石油学院,2008.
[13]崔万军.聚驱过程中滞留油迁移相界面热力学研究[D].大庆:大庆石油学院,2006.
[14]张立娟,岳湘安,刘中春,等.粘弹性流体在盲端孔隙中的流场[J].水动力学研究与进展(A辑),2002,17(6):748-755.Zhang L J,Yue X A,Liu Z C,et al.Flow field of viscoelastic fluid in pores with dead erds[J].Journal of Hydrodynamics,2002,17(6):748-755.
[15]张丽娟,岳湘安,任国友,等.黏弹性聚合物溶液在油藏盲端孔隙中的流动特性[J].石油勘探与开发,2004,31(5):105-108.Zhang L J,Yue X A,Ren G Y,et al.Flow performance of viscoelastic polymer solution in dead end of reservoir pores[J].Petroleum Exploration and Development,2004,31(5):105-108.
[2]Cheng H J,Gu H J,Lou L G,et al.Project design of polymer flooding in conglomerate reservoir in seven zone of Karamay oilfield[J].Xinjiang Petroleum Geology,2009,30(5):609-612.
[3]王德民,程杰成,杨清彦.粘弹性聚合物溶液能够提高岩心的微观驱油效率[J].石油学报,2000,21(5):45-51.Wang D M,Cheng J C,Yang Q Y,et al.Viscous-elastic polymer canincrease micro-scale displacement efficiency in cores[J].Acta Petrolei Sinica,2000,21(5):45-51.
[4]王德民,程杰成,吴军政,等.聚合物驱油技术在大庆油田的应用[J].石油学报,2005,26(1):74-78.Wang D M,Cheng J C,Wu J Z,et al.Application of polymer flooding technology in Daqing oilfield[J].Acta Petrolei Sinica,2005,26(1):74-78.
[5]王德民,程杰成,夏惠芬,等.粘弹性流体平行于界面的力可以提高驱油效率[J]石油学报,2002,23(5):48-52.Wang D M,Cheng J C,Xia H F,et al.Improvement of displacement efficiecy of cross by driving forces parallel to the oilwater interface of viscous-elastic fluids[J].Acta Petrolei Sinica,2002,23(5):48-52.
[6]Yin H J,Fu C Q,Lyu Y P.An unsteady seepage flow model of visco-elastic polymer solution[J].Journal of Hydrodynamics,Ser.B,2004,16(2):209-215.
[7]黄延章,于大森,张桂芳.聚合物驱油微观机理研究[J].油田化学,1990,7(1):57-60.Huang Y Z,Yu D S,Zhang G F.Microscopic mechanisims of oil displacement by polymer solution[J].Oilfield Chemistry,1990,7(1):57-60.
[8]夏惠芬,王德民,刘仲春,等.粘弹性聚合物溶液提高微观驱油效率的机理研究[J].石油学报,2001,22(4):60-65.Xia H F,Wang D M,Liu Z C,et al.Study on the mechanism of polymer solution solution with viscoelastic behavior increasing microscopic oil displace-ment efficiency[J].Acta Petrolei Sinica,2001,22(4):60-65.
[9]夏惠芬,王德民,侯吉瑞,等.黏弹性聚合物溶液对驱油效率的影响[J].大庆石油学院学报,2002,26(2):109-111.Xia H F,Wang D M,Hou J R,et al.Quantitative description of contribution of elasticity of polymer solution to oil displacement efficiency[J].Journal of China University of Petroleum,2002,26(2):109-111.
[10]李华斌.大庆油田缔合聚合物提高驱油效率及机理研究[D].成都:西南石油学院,2004.
[11]王刚,王德民,夏惠芬,等.聚合物溶液的黏弹性对残余油膜的作用[J].大庆石油学院学报,2007,31(1):25-30.Wang G,Wang D M,Xia H F,et al.Effect of viscoelasticity of HPAM solution on residual oil film[J].Journal of Daqing Petroleum Institute,2007,31(1):25-30.
[12]刘丽丽.黏弹性流体在微孔道中流动的数值计算[D].大庆:大庆石油学院,2008.
[13]崔万军.聚驱过程中滞留油迁移相界面热力学研究[D].大庆:大庆石油学院,2006.
[14]张立娟,岳湘安,刘中春,等.粘弹性流体在盲端孔隙中的流场[J].水动力学研究与进展(A辑),2002,17(6):748-755.Zhang L J,Yue X A,Liu Z C,et al.Flow field of viscoelastic fluid in pores with dead erds[J].Journal of Hydrodynamics,2002,17(6):748-755.
[15]张丽娟,岳湘安,任国友,等.黏弹性聚合物溶液在油藏盲端孔隙中的流动特性[J].石油勘探与开发,2004,31(5):105-108.Zhang L J,Yue X A,Ren G Y,et al.Flow performance of viscoelastic polymer solution in dead end of reservoir pores[J].Petroleum Exploration and Development,2004,31(5):105-108.