基于颗粒流的页岩破裂机理试验研究

曾青冬, 姚军

曾青冬, 姚军. 基于颗粒流的页岩破裂机理试验研究[J]. 石油钻探技术, 2015, 43(1): 33-37. DOI: 10.11911/syztjs.201501006
引用本文: 曾青冬, 姚军. 基于颗粒流的页岩破裂机理试验研究[J]. 石油钻探技术, 2015, 43(1): 33-37. DOI: 10.11911/syztjs.201501006
Zeng Qingdong, Yao Jun. Experiment of Shale Failure Mechanism Based on Particle Flow Theory[J]. Petroleum Drilling Techniques, 2015, 43(1): 33-37. DOI: 10.11911/syztjs.201501006
Citation: Zeng Qingdong, Yao Jun. Experiment of Shale Failure Mechanism Based on Particle Flow Theory[J]. Petroleum Drilling Techniques, 2015, 43(1): 33-37. DOI: 10.11911/syztjs.201501006

基于颗粒流的页岩破裂机理试验研究

基金项目: 

国家自然科学"页岩气藏开采基础研究"(编号:51234007)、长江学者和创新团队发展计划"复杂油藏开发和提高采收率的理论与技术"(编号:IRT1294)和山东省自然科学"考虑天然裂缝影响的页岩体积压裂裂缝扩展研究与应用"(编号:2014ZRE28116)资助。

详细信息
    作者简介:

    曾青冬(1987-),男,江西赣州人,2010年毕业于中国石油大学(华东)信息与计算科学专业,在读博士研究生,主要从事页岩水力压裂、油藏数值模拟方面的研究。

  • 中图分类号: TE357.1+1

Experiment of Shale Failure Mechanism Based on Particle Flow Theory

  • 摘要: 为探究页岩气藏水力压裂复杂裂缝网络的形成机理,开展了基于颗粒流的页岩破裂数值试验研究。根据页岩的岩石力学性质,采用并行PSO算法反演得到页岩颗粒细观力学参数,并基于PFC离散单元模型分别进行了预制2条裂纹下的巴西劈裂和水力劈裂数值试验,通过改变试验参数分析了裂纹相互作用对其扩展的影响。数值模拟发现:巴西劈裂试验预制裂纹夹角为30°和45°时,垂直裂纹扩展至倾斜裂纹时停止扩展转而从倾斜裂纹两端开裂并扩展,变形由弹性变形变为塑性变形;裂纹夹角为90°时,垂直裂纹贯穿水平裂纹,变形主要是弹性变形;水力劈裂试验中,预制裂纹夹角越小,倾斜裂纹越容易发生剪切破坏,垂直裂纹越趋于改变扩展方向,扩展路径越复杂。研究表明,裂纹倾角对页岩气藏水力压裂缝网的形态具有重要作用,岩体应变达到峰值后轴向应力-应变呈现先减小后增大的余弦波函数关系,且倾角越小压裂缝网越复杂。
    Abstract: To discover the mechanism that generates complex fracture network in hydraulic fracturing of shale gas reservoirs, a numerical simulation was conducted hydraulic fracturing on shale cracking based on particle flow theory.Shale particle meso-mechanical parameters were retrieved by a parallel PSO algorithm with shale rock mechanical parameters.Brazilian tests and hydraulic fracturing tests with two preset cracks were carried out with the PFC discrete element model, with the next step that the effect of interaction between fractures on propagation was analyzed through varying test parameters.Numerical simulations demonstrated that when the preset crack was 30°or 45°inclined in the Brazilian test, the vertical crack turned into the preset crack and initiated from the sides of the preset crack.At that point, the stress-strain curve turned from elastic deformation to plastic deformation;when the preset crack was inclined 90°, the vertical crack propagated across the preset crack, and stress-strain curve demonstrated mainly elastic deformation.The smaller inclined angle of preset crack in the hydraulic fracturing test, and the easier preset crack shears, the more readily vertical crack changes its propagation direction, and further the more complicated propagation paths.The results demonstrated that the inclined angle of crack exerts significant influence on hydraulic fracture networks in shale gas reservoir;and after rock strain reaches is peak, the axial stress-strain curve decreases and then increases in a cosine wave relation.At that point, fracture networks become more complicated with decreasing inclined angle.
  • [1] 姚军, 孙海, 黄朝琴, 等.页岩气藏开发中的关键力学问题[J].中国科学:物理学 力学 天文学, 2013, 43(12):1527-1547. Yao Jun, Sun Hai, Huang Zhaoqin, et al.Key mechanical problems in the development of shale gas reservoirs[J].Scientia Sinica:Physica, Mechanica Astronomica, 2013, 43(12):1527-1547.
    [2] 邵尚奇, 田守嶒, 李根生, 等.泥页岩地层水力裂缝延伸方位研究[J].石油钻探技术, 2014, 42(3):27-31. Shao Shangqi, Tian Shouceng, Li Gensheng, et al.Propagating orientation of hydraulic fractures in muddy shale formation[J].Petroleum Drilling Techniques, 2014, 42(3):27-31.
    [3]

    Cundall P A, Strack O D L.Particle flow code in 2 dimensions[M].Minnesota:Itasca Consulting Group Inc, 1999:1-15.

    [4]

    Bahaaddini M, Sharrock G, Hebblewhite B K.Numerical investigation of the effect of joint geometrical parameters on the mechanical properties of a non-persistent jointed rock mass under uniaxial compression[J].Computers and Geotechnics, 2013, 49:206-225.

    [5]

    Zhang Xiaoping, Wong Louis Ngai Yuen.Cracking processes in rock-like material containing a single flaw under uniaxial compression:a numerical study based on parallel bonded-particle model approach[J].Rock Mechanics and Rock Engineering, 2012, 45(5):711-737.

    [6] 王连庆, 高谦, 王建国, 等.自然崩落采矿法的颗粒流数值模拟[J].北京科技大学学报, 2007, 29(6):557-561. Wang Lianqing, Gao Qian, Wang Jianguo, et al.Numerical simulation of natural caving method based on particle flow code in two dimensions[J].Journal of University of Science and Technology Beijing, 2007, 29(6):557-561.
    [7] 周健, 王家全, 曾远, 等.土坡稳定分析的颗粒流模拟[J].岩土力学, 2009, 30(1):86-90. Zhou Jian, Wang Jiaquan, Zeng Yuan, et al.Simulation of slope stability analysis by particle flow code[J].Rock and Soil Mechanics, 2009, 30(1):86-90.
    [8] 周健, 张刚, 孔戈.渗流的颗粒流细观模拟[J].水利学报, 2006, 37(1):28-32. Zhou Jian, Zhang Gang, Kong Ge.Meso-mechanics simulation of seepage with particle flow code[J].Journal of Hydralic Engineering, 2006, 37(1):28-32.
    [9] 孙锋, 张顶立, 陈铁林, 等.土体劈裂注浆过程的细观模拟研究[J].岩土工程学报, 2010, 32(3):474-480. Sun Feng, Zhang Dingli, Chen Tielin, et al.Meso-mechanical simulation of fracture grouting in soil[J].Chinese Journal of Geotechnical Engineering, 2010, 32(3):474-480.
    [10] 杨艳, 常晓林, 周伟, 等.裂隙岩体水力劈裂的颗粒离散元数值模拟[J].四川大学学报:工程科学版, 2012, 44(5):78-85. Yang Yan, Chang Xiaolin, Zhou Wei, et al.Simulation of hydraulic fracturing of fractured rock mass by PFC2D[J].Journal of Sichuan University:Engineering Science Edition, 2012, 44(5):78-85.
    [11] 杨建, 付永强, 陈鸿飞, 等.页岩储层的岩石力学特性[J].天然气工业, 2012, 32(7):12-14. Yang Jian, Fu Yongqiang, Chen Hongfei, et al.Rock mechanical characteristics of shale reservoirs[J].Natural Gas Industry, 2012, 32(7):12-14.
    [12]

    Shen B, Stephansson O, Rinne M, et al.Fracod modeling of rock fracturing and permeability change in excavation damaged zones[J].International Journal of Geomechanics, 2010, 11(4):302-313.

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出版历程
  • 收稿日期:  2014-07-29
  • 刊出日期:  1899-12-31

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