聚能射流侵彻页岩储层损伤裂隙形成机制

牟恭雨 罗宁 申涛 梁汉良 柴亚博 翟成

牟恭雨, 罗宁, 申涛, 梁汉良, 柴亚博, 翟成. 聚能射流侵彻页岩储层损伤裂隙形成机制[J]. 爆炸与冲击, 2023, 43(3): 033301. doi: 10.11883/bzycj-2022-0182
引用本文: 牟恭雨, 罗宁, 申涛, 梁汉良, 柴亚博, 翟成. 聚能射流侵彻页岩储层损伤裂隙形成机制[J]. 爆炸与冲击, 2023, 43(3): 033301. doi: 10.11883/bzycj-2022-0182
MU Gongyu, LUO Ning, SHEN Tao, LIANG Hanliang, CHAI Yabo, ZHAI Cheng. Mechanism of damage-induced fracture formation in shale reservoir penetrated by shaped charge jet[J]. Explosion And Shock Waves, 2023, 43(3): 033301. doi: 10.11883/bzycj-2022-0182
Citation: MU Gongyu, LUO Ning, SHEN Tao, LIANG Hanliang, CHAI Yabo, ZHAI Cheng. Mechanism of damage-induced fracture formation in shale reservoir penetrated by shaped charge jet[J]. Explosion And Shock Waves, 2023, 43(3): 033301. doi: 10.11883/bzycj-2022-0182

聚能射流侵彻页岩储层损伤裂隙形成机制

doi: 10.11883/bzycj-2022-0182
基金项目: 国家重点研发计划(2020YFA0711800);国家自然科学基金(12072363);徐州市重点研发计划(KC21301);爆炸科学与技术国家重点实验室开放基金(KFJJ22-02M)
详细信息
    作者简介:

    牟恭雨(1997- ),男,硕士研究生,1439308413@qq.com

    通讯作者:

    罗 宁(1980- ),男,博士,教授,nluo@cumt.edu.cn

  • 中图分类号: O385

Mechanism of damage-induced fracture formation in shale reservoir penetrated by shaped charge jet

  • 摘要: 为研究药型罩对聚能射孔弹侵彻页岩储层的射孔和损伤致裂效果的影响机理,建立了射孔弹-空气-页岩三维模型,设置药型罩的锥角分别为50°、60°、70°和80°,壁厚分别为0.5、1.0和1.5 mm,材料分别为铜、钢、钛和钨。利用ANSYS/LS-DYNA软件进行数值计算,分别从射流速度与形态、页岩射孔效果及页岩孔裂隙形成规律特征等进行系统性分析。研究结果表明:在射孔弹结构中,随着药型罩锥角的减小,射流速度提高、杵体速度降低、侵彻深度增大同时开孔孔径减小。在一定范围内,适当减小药型罩的壁厚,可以提高射流速度、减小杵体质量、增大侵彻深度和开孔倾斜度。药型罩材料对射流速度、杵体结构和页岩射孔效果均有显著影响,其中钨药型罩射孔弹的侵彻深度最大但开孔孔径最小,钛药型罩射孔弹的侵彻深度最小但开孔倾斜度最大,铜比钢药型罩射孔弹的侵彻深度略大但开孔孔径略小。通过研究不同对照组的页岩孔裂隙形成规律特征发现,页岩孔裂隙发育主要发生在杵体对页岩的再扩孔阶段,减小射流初始扩孔孔径、增大杵体直径、提高杵体速度,可以促进页岩孔裂隙发育程度。
  • 图  1  DP46RDX42-Y型射孔弹及其三维模型

    Figure  1.  Perforating charge and its three-dimensional model

    图  2  三维有限元模型及其前处理

    Figure  2.  The three-dimensional finite element model and its preprocessing

    图  3  配有不同药型罩的射孔弹模型

    Figure  3.  Perforating charge models with different liners

    图  4  药型罩的锥角对射流头部速度和页岩侵彻深度的影响

    Figure  4.  Effect of cone angle of liner on jet tip velocity and shale penetration depth

    图  5  药型罩的锥角对射流形态及速度分布的影响

    Figure  5.  The jet shape and velocity distribution of different cone angle groups

    图  6  不同锥角组的开孔半径-侵彻深度变化曲线

    Figure  6.  Perforation radius-penetration depth curves of different cone angle groups

    图  7  药型罩的壁厚对射流头部速度和页岩侵彻深度的影响

    Figure  7.  Effect of thickness of liner on jet tip velocity and shale penetration depth

    图  8  药型罩的壁厚对射流形态及速度分布的影响

    Figure  8.  The jet shape and velocity distribution of different thickness groups

    图  9  不同壁厚组的开孔半径-侵彻深度变化曲线

    Figure  9.  Perforation radius-penetration depth curves of different thickness groups

    图  10  药型罩的材料对射流头部速度和页岩侵彻深度的影响

    Figure  10.  Effect of liner material on jet tip velocity and shale penetration depth

    图  11  药型罩的材料对射流形态及速度分布的影响

    Figure  11.  The jet shape and velocity distribution of different material groups

    图  12  不同材料组的开孔半径-侵彻深度变化曲线

    Figure  12.  Perforation radius-penetration depth curves of different material groups

    图  13  外壳对聚能射流及其侵彻深度的影响

    Figure  13.  Effect of shell on shaped charge jet and its penetration depth

    图  14  不同锥角药型罩组的页岩损伤和裂隙发育情况

    Figure  14.  Shale damage and fracture extension of different cone angle liner groups

    图  15  不同壁厚药型罩组的页岩损伤和裂隙发育情况

    Figure  15.  Shale damage and fracture extension of different thickness liner groups

    图  16  不同材料药型罩组的页岩损伤和裂隙发育情况

    Figure  16.  Shale damage and fracture extension of different material liner groups

    表  1  金属材料的本构模型参数

    Table  1.   Parameters of the constitutive model of metallic materials

    材料$ {\rho _2} $/(kg·m−3)$ {A_1} $/MPa$ {B_1} $/MPaCnm$ {T_{{\text{melt}}}} $/K$ {T_{{\text{room}}}} $/K
    8960902920.0250.311.091356293
    78307925100.0140.261.031793293
    451011111060.0250.291.101710293
    1700015061770.0160.121.001723293
    下载: 导出CSV

    表  2  金属材料的状态方程参数

    Table  2.   Parameters of the equation of state of metallic materials

    材料c/(m·s−1)$ {S_1} $$ {S_2} $$ {S_3} $$ {\gamma _0} $$ a $$ {E_2} $/J
    39401.490001.990.460
    45691.490002.170.460
    52101.620002.320.460
    40291.237001.540.460
    下载: 导出CSV

    表  3  页岩本构模型参数

    Table  3.   Parameters of the shale constitutive model

    ρ3/(kg·m−3)G/GPaA2B2$ \dot \varepsilon /{{\text{s}}^{ - 1}} $εfminSmaxpcr/GPaµcrD1
    265012.000.711.842.9×10−50.015.00.0358×10−40.045
    D2T/MPafc/MPaµlockC7Nplock/GPaK1/GPaK2/GPaK3/GPa
    1.0013.8121.360.10.0071.001.03585−171208
    下载: 导出CSV

    表  4  射孔弹模型的分组

    Table  4.   Grouping of perforating charge models

    编号锥角/(°)壁厚/mm材料
    A-1-Ⅰ501.0
    B-1-Ⅰ601.0
    C-1-Ⅰ701.0
    D-1-Ⅰ801.0
    C-2-Ⅰ700.5
    C-3-Ⅰ701.5
    C-1-Ⅱ701.0
    C-1-Ⅲ701.0
    C-1-Ⅳ701.0
    下载: 导出CSV
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  • 收稿日期:  2022-04-27
  • 修回日期:  2022-06-08
  • 网络出版日期:  2022-06-09
  • 刊出日期:  2023-03-05

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