页岩油水平井压裂渗吸驱油数值模拟研究

欧阳伟平 张冕 孙虎 张云逸 池晓明

欧阳伟平, 张冕, 孙虎, 张云逸, 池晓明. 页岩油水平井压裂渗吸驱油数值模拟研究[J]. 石油钻探技术, 2021, 49(4): 143-149. doi: 10.11911/syztjs.2021083
引用本文: 欧阳伟平, 张冕, 孙虎, 张云逸, 池晓明. 页岩油水平井压裂渗吸驱油数值模拟研究[J]. 石油钻探技术, 2021, 49(4): 143-149. doi: 10.11911/syztjs.2021083
OUYANG Weiping, ZHANG Mian, SUN Hu, ZHANG Yunyi, CHI Xiaoming. Numerical Simulation of Oil Displacement by Fracturing Imbibition in Horizontal Shale Oil Wells[J]. Petroleum Drilling Techniques, 2021, 49(4): 143-149. doi: 10.11911/syztjs.2021083
Citation: OUYANG Weiping, ZHANG Mian, SUN Hu, ZHANG Yunyi, CHI Xiaoming. Numerical Simulation of Oil Displacement by Fracturing Imbibition in Horizontal Shale Oil Wells[J]. Petroleum Drilling Techniques, 2021, 49(4): 143-149. doi: 10.11911/syztjs.2021083

页岩油水平井压裂渗吸驱油数值模拟研究

doi: 10.11911/syztjs.2021083
详细信息
    作者简介:

    欧阳伟平(1986—),男,江西萍乡人,2009年毕业于中山大学理论与应用力学专业,2014年获中国科学院力学研究所流体力学专业博士学位,高级工程师,主要从事油气藏工程及压裂设计方面的研究工作。E-mail:ouywp56@163.com

  • 中图分类号: TE312; TE319

Numerical Simulation of Oil Displacement by Fracturing Imbibition in Horizontal Shale Oil Wells

  • 摘要: 为了提高压裂页岩油水平井产量预测精度、优化闷井时间及压裂液用量等参数,建立了一种考虑压裂液注入、闷井渗吸及开井生产的压裂页岩油水平井油水两相渗流数学模型,利用控制体积有限元法求其数值解,模拟了渗吸作用下基质–裂缝油水置换的过程,获得了油水压力场、速度场、产量及含水率的动态变化。分析了压裂渗吸驱油特征,优化了闷井时间和压裂液用量,并研究了基质渗透率和缝网复杂程度对渗吸驱油的影响。研究结果表明:毛细管力越大,闷井时间越长,则含水率越低,渗吸增产作用越明显;压裂液用量增加能够提高渗吸驱油产量,但同时会引起含水率升高,可通过含水率和产量增幅确定压裂液合理的用量;最优闷井时间受毛细管力、基质渗透率和缝网复杂程度的影响,其中毛细管力和基质渗透率决定了渗吸速度,而缝网复杂程度决定了渗吸面积。所建立的渗吸油水两相渗流模型可为页岩油水平井压裂优化设计提供依据。
  • 图  1  复杂裂缝网络描述示意[24]

    Figure  1.  Description of complex fracture networks[24]

    图  2  裂缝基质的CVFE网格示意

    Figure  2.  CVFE meshes of the matrix and fractures

    图  3  单段在不同毛细管力作用下的产油量及含水率

    Figure  3.  Oil production and water cut of single stage under different capillary forces

    图  4  闷井75 d时裂缝周围油水相的压力场及速度场

    Figure  4.  Pressure field and velocity field of the oil phase and water phase around the fractures on the 75th day of shut in

    图  5  闷井时间对单段产油量的影响

    Figure  5.  Effect of shut-in time on the oil production of single stage

    图  6  压裂液用量对产油量及含水率的影响

    Figure  6.  Effect of fracturing fluid volume on oil production and water cut

    图  7  基质渗透率对单段产油量的影响

    Figure  7.  Effect of matrix permeability on the oil production of single stage

    图  8  缝网复杂程度对单段产油量的影响

    Figure  8.  Effect of fracture network complexity on the oil production of single stage

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  • 收稿日期:  2020-04-12
  • 修回日期:  2021-06-09
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