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基于核磁共振技术的非均质岩心中泡沫动态稳定性评价方法及应用

李原 狄勤丰 王文昌 华帅

李原, 狄勤丰, 王文昌, 华帅. 基于核磁共振技术的非均质岩心中泡沫动态稳定性评价方法及应用. 力学学报, 2021, 53(8): 2205-2213 doi: 10.6052/0459-1879-21-278
引用本文: 李原, 狄勤丰, 王文昌, 华帅. 基于核磁共振技术的非均质岩心中泡沫动态稳定性评价方法及应用. 力学学报, 2021, 53(8): 2205-2213 doi: 10.6052/0459-1879-21-278
Li Yuan, Di Qinfeng, Wang Wenchang, Hua Shuai. Evaluation method and application of foam dynamic stability in heterogeneous cores based on nuclear magnetic resonance technology. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(8): 2205-2213 doi: 10.6052/0459-1879-21-278
Citation: Li Yuan, Di Qinfeng, Wang Wenchang, Hua Shuai. Evaluation method and application of foam dynamic stability in heterogeneous cores based on nuclear magnetic resonance technology. Chinese Journal of Theoretical and Applied Mechanics, 2021, 53(8): 2205-2213 doi: 10.6052/0459-1879-21-278

基于核磁共振技术的非均质岩心中泡沫动态稳定性评价方法及应用

doi: 10.6052/0459-1879-21-278
基金项目: 国家自然科学基金资助项目(51804193, 51704190)
详细信息
    作者简介:

    狄勤丰, 教授, 主要研究方向: 石油工程力学及其应用. E-mail: qinfengd@staff.shu.edu.cn

  • 中图分类号: TE357

EVALUATION METHOD AND APPLICATION OF FOAM DYNAMIC STABILITY IN HETEROGENEOUS CORES BASED ON NUCLEAR MAGNETIC RESONANCE TECHNOLOGY

Funds: The project was supported by the National Natural Science Foundation of China (51804193) and the National Natural Science Foundation of China (51704190)
  • 摘要: 基于有效孔隙体积守恒和核磁共振技术建立了泡沫在岩心中的动态稳定性的评价方法. 利用油、水标定方法测量了岩心中油相和泡沫液的体积, 计算了泡沫在岩心驱替过程中的动态稳定因子. 测试了双层非均质岩心的横向弛豫谱线及核磁共振图像, 比较了纳米颗粒强化泡沫和表面活性剂泡沫的驱油效果和动态稳定因子. 结果表明, 岩心中的含水体积在注入2.0 PV泡沫前快速上升随后基本稳定; 而含气体积逐渐上升, 注入5.0 PV泡沫后上升速率变小. 泡沫的动态稳定因子经历了骤减、递增和平稳3个阶段. 泡沫前期的驱油效果主要依赖于水相, 随着含水体积基本稳定, 岩心的产油速率和泡沫动态稳定因子的增长速率具有明显正相关关系, 即中后期取决于泡沫气体对剩余油的驱替能力. 与表面活性剂泡沫相比, 纳米颗粒强化泡沫提高了低渗层的波及能力和驱油效率, 抑制了泡沫发展的不稳定阶段并且提高了动态稳定因子最终的平衡值. 该稳定性评价方法可用于反映泡沫渗流特点并筛选适合储层特征的稳定泡沫体系.

     

  • 图  1  实验装置示意图

    Figure  1.  Schematic diagram of experimental device

    图  2  非均质砂岩岩心的(a)冠状面和(b)横截面

    Figure  2.  (a) Coronal plane and (b) transverse plane of heterogeneous sandstone core

    图  3  饱和MnCl2溶液过程中岩心C-01的T2

    Figure  3.  T2 spectrum of C-01during injection of MnCl2 solution

    图  4  C-01 MnCl2溶液标定曲线

    Figure  4.  Calibration curve of MnCl2 solution in core C-01

    图  5  SDS泡沫驱油过程中岩心C-01的T2

    Figure  5.  T2 spectrum of core C-01 for SDS foam flooding

    图  6  纳米颗粒强化SDS泡沫驱过程中岩心C-02的T2

    Figure  6.  T2 spectrum of core C-02 for nanoparticles-enhanced SDS foam flooding

    图  7  泡沫驱过程中非均质岩心的磁共振成像(信号为油相, (a) ~ (d)为SDS泡沫驱, (e) ~ (f)为纳米颗粒强化SDS泡沫驱)

    Figure  7.  Magnetic resonance images of heterogeneous cores during foam flooding (signal represents oil phase, (a) ~ (d): SDS foam, (e) ~ (f): nanoparticles-enhanced SDS foam)

    图  8  非均质岩心中泡沫动态稳定因子变化情况

    Figure  8.  Foam dynamic stability factor in heterogeneous cores

    图  9  泡沫驱过程岩心中气、液体积变化情况

    Figure  9.  Variation of gas and liquid volume in core during foam flooding

    图  10  泡沫驱过程中岩心驱油效率的变化情况

    Figure  10.  Variation of oil displacement efficiency during foam flooding

    表  1  岩心物性参数

    Table  1.   Physical parameters of cores

    Core symbolC-01C-02
    diameter/cm2.49 2.50
    length/cm8.67 8.78
    pore volume/mL9.34 9.46
    porosity22.13%21.96%
    permeability/mD1873.44 1954.72
    下载: 导出CSV

    表  2  C-01中MnCl2溶液质量与T2谱峰面积关系

    Table  2.   Relationship between the mass of MnCl2 solution in C-01 and the peak area of T2 spectrum

    Injected time of MnCl2 solution/minMass of MnCl2 solution
    in core/g
    Peak area of T2 spectrum
    00465.82
    52.411565.71
    104.624228.43
    157.295951.11
    309.086827.79
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-06-18
  • 录用日期:  2021-08-03
  • 网络出版日期:  2021-08-03
  • 刊出日期:  2021-08-18

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