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多场耦合作用下致密储层渗流特性研究

曾治平 王千军 李静 范婕 王昊 刘晨

曾治平, 王千军, 李静, 等, 2019. 多场耦合作用下致密储层渗流特性研究. 地质力学学报, 25 (6): 1068-1074. DOI: 10.12090/j.issn.1006-6616.2019.25.06.089
引用本文: 曾治平, 王千军, 李静, 等, 2019. 多场耦合作用下致密储层渗流特性研究. 地质力学学报, 25 (6): 1068-1074. DOI: 10.12090/j.issn.1006-6616.2019.25.06.089
ZENG Zhiping, WANG Qianjun, LI Jing, et al., 2019. STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING. Journal of Geomechanics, 25 (6): 1068-1074. DOI: 10.12090/j.issn.1006-6616.2019.25.06.089
Citation: ZENG Zhiping, WANG Qianjun, LI Jing, et al., 2019. STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING. Journal of Geomechanics, 25 (6): 1068-1074. DOI: 10.12090/j.issn.1006-6616.2019.25.06.089

多场耦合作用下致密储层渗流特性研究

doi: 10.12090/j.issn.1006-6616.2019.25.06.089
基金项目: 

国家科技重大专项 2016ZX05002-002

国家自然科学基金 41972138

详细信息
    作者简介:

    曾治平(1977-), 男, 高级工程师, 博士, 从事石油地质与油气成藏研究。E-mail:zengzhipingupc@163.com

    通讯作者:

    李静(1967-), 女, 博士, 教授, 博士生导师, 地质力学及油气储层预测。E-mail:lijing0681@163.com

  • 中图分类号: TE319

STUDY ON SEEPAGE CHARACTERISTICS OF TIGHT RESERVOIRS UNDER MULTI-FIELD COUPLING

  • 摘要: 储层岩石的渗流特性对致密砂岩储层的评价及开发具有重要意义。为此,研究构建热流固耦合控制方程,采用COMSOL Multiphyics软件,针对准噶尔盆地中部4区块某三维区致密储层不同开采时间下流体渗流速度和地层孔隙压力的分布规律开展了数值模拟研究。研究结果表明,流体渗流速度最大值出现在井口及其周围地区,断层破碎过渡带流体渗流速度高于周围连续地层和断层核部;随着与井口距离的增加,开采过程中流体渗流速度变化规律由先增加后减小最后趋于稳定逐步转化为先缓慢增加后逐步趋于稳定;在开采初期,孔隙压力等压线在井口周围呈环形分布,而后低应力区沿断层的开展方向进行扩展;孔隙压力随着开采时间的增加而不断减小,同时间节点下,距离井口越远,孔隙压力越大且下降幅度越小。研究成果为正确预测开发生产指标,为提高致密油气勘探开发效果提供技术支撑。

     

  • 图  1  准噶尔盆地中部4区块地质概况图

    Figure  1.  Geological survey map of the No.4 block in central Junggar Basin

    图  2  多场耦合数值模型应力施加图

    Figure  2.  Stress applied graph of the multi-field coupling numerical model

    图  3  多场耦合模型网格划分图

    Figure  3.  Grid mapping of the multi-field coupling model

    图  4  多场耦合作用下流体渗流速度及方向分布图(m/s)

    Figure  4.  Seepage velocity and direction distribution of fluid under multi-field coupling(m/s)

    图  5  渗流速度随开采时间的变化曲线

    Figure  5.  Variation curves of seepage velocity with mining time

    图  6  井口附近流体渗流速度曲线图

    Figure  6.  Curves of fluid velocity in the vicinity of the wellhead

    图  7  孔隙压力变化云图(Pa)

    Figure  7.  Cloud charts of pore pressure variation (Pa)

    图  8  孔隙压力变化曲线图

    Figure  8.  Curves of pore pressure with time at different locations

    表  1  计算参数表

    Table  1.   Table of calculation parameters

    介质 密度/(kg/m3) 弹性模量/GPa 泊松比 热熔系数J/(kg·K) 热传导系数W/(m·K) 热膨胀系数/K 孔隙率
    连续地层 2700 28 0.22 923 2.47 5.3×10-5 0.06
    破碎过渡区 2100 16.8 0.314 923 2.61 6.2×10-5 0.35
    断层核部 2800 28.8 0.21 923 2.45 5.2×10-5 0.03
    液相 1070 4200 随温度变化 2.08×10-4
    下载: 导出CSV

    表  2  最优化反演数据表

    Table  2.   Optimized inversion data sheet

    边界荷载 反演最优值/MPa 边界荷载 反演最优值/MPa 边界荷载 反演最优值/MPa 边界荷载 反演最优值/MPa
    P1 149.47 P5 107.61 T1 93.93 T5 -89.08
    P2 91.55 P6 123.66 T2 -64.19 T6 14.19
    P3 77.72 P7 131.6 T3 58.59 T7 69.59
    P4 138.54 P8 86.51 T4 -16.51 T8 22.67
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-09-15
  • 修回日期:  2019-07-24
  • 刊出日期:  2019-12-31

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