基于流-固耦合的水平缝压裂滤失规律研究
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摘要
使用ABAQUS软件,建立了包含隔层和储层的层状多孔介质三维有限元模型,采用三维流固耦合实体单元和cohesive粘结单元描述岩石和裂缝的损伤行为.模拟直井水平缝的起裂和扩展以及液体滤失过程,分析得到了地质因素和工程因素对水平裂缝扩展参数的影响以及对滤失距离的影响,并进行了参数显著性分析,参数包括弹性模量、施工排量、渗透率、压力液粘度、地应力、孔隙压力和施工液量,最后利用模拟的规律认识指导实际井的压裂施工参数设计,压后效果显著.
Based on ABAQUS software, a layered porous media of the three-dimensional finite element model including interlayer and reservoir is established. The 3D fluid-solid coupling solid element and the cohesive bonding unit are used to describe the damage behavior of rock and fracture. The model stimulates the initiation and propagation of horizontal fracture in fracturing process including fracturing fluid leak-off behavior. The effects of geological factors and engineering factors on horizontal fracture parameters and the effect of distance on leak-off are analyzed, including significance of these parameters. The concerned parameters include elastic modulus, injection rate, permeability, viscosity, in-situ horizontal stress,pore pressure and fracturing fluid volume. By using the simulation regularity of fracturing parameters to guide the design of the actual well, good results have been achieved.
Based on ABAQUS software, a layered porous media of the three-dimensional finite element model including interlayer and reservoir is established. The 3D fluid-solid coupling solid element and the cohesive bonding unit are used to describe the damage behavior of rock and fracture. The model stimulates the initiation and propagation of horizontal fracture in fracturing process including fracturing fluid leak-off behavior. The effects of geological factors and engineering factors on horizontal fracture parameters and the effect of distance on leak-off are analyzed, including significance of these parameters. The concerned parameters include elastic modulus, injection rate, permeability, viscosity, in-situ horizontal stress,pore pressure and fracturing fluid volume. By using the simulation regularity of fracturing parameters to guide the design of the actual well, good results have been achieved.
引文
[1]潘赫,卢祥国,谢坤,王珂昕.压裂液滤失性对增油效果的影响和作用机理[J].油田化学,2017, 34(02):245-249.
[2]张汝生,王强,张祖国,等.水力压裂裂缝三维扩展ABAQUS数值模拟研究[J].石油钻采工艺,2012(6):69-72.
[3]连志龙,张劲,吴恒安,等.水力压裂扩展的流固耦合数值模拟研究[J].岩土力学,2008(11):3021-3026.
[4]彪仿俊.水力压裂水平裂缝扩展的数值模拟研究[D].中国科学技术大学,2011.
[5] Zienkiewicz O C, Taylor R L. The finite element method:An introduction with partial differential equations[M]. Burlington:Elsevier, 2005:42-45.
[6]冉启全,李士伦.流固耦合油藏数值模拟中物性参数动态模型研究[J].石油勘探与开发,1997, 24(3):61-65.
[7] Adachi J, Siebrits E. A computer simulation of hydraulic fracture[J]. International Journal of Rock Mechanics&Mining Sciences, 2007, 44(5):739-757.
[8] Turon A, Camanho P P, Costa J. A damage model for the simulation of delamination in advanced composites under variable-model loading[J]. Mechanics of Materials, 2006, 38(10):1072-1089.
[9]张飞,张士诚,张劲,邹雨时,周彤.基于流-固耦合法的砂泥岩储层压裂裂缝延伸规律研究[J].西安石油大学学报(自然科学版),2016, 31(01):68-72.
[10]潘林华,张士诚,张劲,张平.基于流-固耦合的压裂裂缝形态影响因素分析[J].西安石油大学学报(自然科学版),2012, 27(03):76-80+2.
[11]郝行舟,李春生.正交试验设计方法在试验设计中的应用[J].河南交通科技,1999(06):26-28.
[2]张汝生,王强,张祖国,等.水力压裂裂缝三维扩展ABAQUS数值模拟研究[J].石油钻采工艺,2012(6):69-72.
[3]连志龙,张劲,吴恒安,等.水力压裂扩展的流固耦合数值模拟研究[J].岩土力学,2008(11):3021-3026.
[4]彪仿俊.水力压裂水平裂缝扩展的数值模拟研究[D].中国科学技术大学,2011.
[5] Zienkiewicz O C, Taylor R L. The finite element method:An introduction with partial differential equations[M]. Burlington:Elsevier, 2005:42-45.
[6]冉启全,李士伦.流固耦合油藏数值模拟中物性参数动态模型研究[J].石油勘探与开发,1997, 24(3):61-65.
[7] Adachi J, Siebrits E. A computer simulation of hydraulic fracture[J]. International Journal of Rock Mechanics&Mining Sciences, 2007, 44(5):739-757.
[8] Turon A, Camanho P P, Costa J. A damage model for the simulation of delamination in advanced composites under variable-model loading[J]. Mechanics of Materials, 2006, 38(10):1072-1089.
[9]张飞,张士诚,张劲,邹雨时,周彤.基于流-固耦合法的砂泥岩储层压裂裂缝延伸规律研究[J].西安石油大学学报(自然科学版),2016, 31(01):68-72.
[10]潘林华,张士诚,张劲,张平.基于流-固耦合的压裂裂缝形态影响因素分析[J].西安石油大学学报(自然科学版),2012, 27(03):76-80+2.
[11]郝行舟,李春生.正交试验设计方法在试验设计中的应用[J].河南交通科技,1999(06):26-28.