岩性油气藏 ›› 2019, Vol. 31 ›› Issue (4): 121–132.doi: 10.12108/yxyqc.20190413

• 油气田开发 • 上一篇    下一篇

岩石气水两相渗流的玻璃刻蚀驱替实验与有限元数值模拟对比

吴丰1,2, 姚聪1, 丛林林3, 袁龙4, 闻竹5, 张凤生4, 习研平1   

  1. 1. 西南石油大学 地球科学与技术学院, 成都 610500;
    2. 油气藏地质及开发工程国家重点实验室·西南石油大学, 成都 610500;
    3. 延长油田股份有限公司, 陕西 延安 716000;
    4. 中国石油集团测井有限公司 测井应用研究院, 西安 710077;
    5. 中国石油集团渤海钻探工程有限公司 第一录井公司, 天津 300280
  • 收稿日期:2018-12-27 修回日期:2019-03-15 出版日期:2019-07-21 发布日期:2019-06-21
  • 作者简介:吴丰(1983-),男,博士,讲师,主要从事测井原理及地质应用、非常规储层评价(致密砂岩、碳酸盐岩、页岩等)和岩石物理方向的研究及教学工作。地址:(610500)四川省成都市新都区新都大道8号西南石油大学地球科学与技术学院。Email:wufengzh@swpu.edu.cn。
  • 基金资助:
    油气藏地质及开发工程国家重点实验室·西南石油大学开放基金"基于三维数字岩心及岩电实验的致密砂岩导电特性研究"（编号：PLN201719）和西南石油大学科研"启航计划""基于三维数字岩心的两相流渗流及岩电参数数值模拟"（编号：2017QHZ-004）联合资助

Comparison of glass etching displacement experiment and finite element numerical simulation for gas-water two-phase seepage in rocks

WU Feng1,2, YAO Cong1, CONG Linlin3, YUAN Long4, WEN Zhu5, ZHANG Fengsheng4, XI Yanping1   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
    3. Yanchang Oil Field Co., Ltd., Yan'an 716000, Shaanxi, China;
    4. Logging Application Research Institute, CNPC Logging, Xi'an 710077, China;
    5. No.1 Mudlogging Company, Bohai Drilling Engineering Company, CNPC, Tianjing 300280, China
  • Received:2018-12-27 Revised:2019-03-15 Online:2019-07-21 Published:2019-06-21

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摘要： 岩石微观可视化两相渗流特征研究对于油气田开发具有重要意义。分别采用微观可视化玻璃刻蚀驱替实验和有限元数值模拟对岩石中微观气水两相流体的动态渗流特征进行了研究，并将数值模拟结果与微观玻璃刻蚀驱替实验结果进行了对比验证。结果表明，有限元数值模拟结果与玻璃刻蚀驱替实验结果基本一致。气水两相流驱替实验过程中存在明显的指进现象；驱替结束后，分布在大孔喉和与大孔喉相连的孔隙中的水被驱替，未被驱替的水主要分布在小孔喉、小孔喉控制的大孔隙和孔隙盲端；单相渗流达到稳态后，流动通道中心的流体流速比入口处流体流速大，孔喉半径越大，压力降低越慢。微观玻璃刻蚀驱替实验方法能较好地观测微观指进现象和气体在通过狭窄喉道时的运移跳跃现象，而有限元数值模拟方法则具有成本低、易于操作、实验可重复性高等优点。微观玻璃刻蚀驱替实验与有限元数值模拟相结合研究气水两相渗流效果更佳。

关键词: 两相流驱替, 玻璃刻蚀, 有限元模拟, Navier-Stokes方程

Abstract: The study of rock micro-visualization two-phase seepage characteristics is of great significance to the development of oil and gas fields. The dynamic seepage characteristics of micro gas-water two-phase fluids in rocks were studied by means of micro visual glass etching displacement experiment and finite element numerical simulation respectively,and the results of finite element numerical simulation were verified by micro-glass etching displacement experiment. The results show that the finite element numerical simulation results are basically consistent with the experimental results of glass etching displacement. There are obvious fingering phenomena in gaswater two-phase flow displacement experiment process. After displacement,water distributed in the large throats and the hole connected with the large throats was displaced by gas,while the irreducible water was mainly distributed in the small throats and macropores controlled by the small throats and blind end of the pore. When the one-phase seepage reached steady state,the flow velocity in the center of the flow channel was higher than that at the entrance. The greater the pore throat radius,the slower the pressure drop. The micro glass etching displacement experiment method can better observe micro-fingering phenomenon and gas migration jump phenomenon when passing through narrow throat,while the finite element numerical simulation method has many advantages, such as low cost,easy operation and high repeatability. The combination of micro glass etching displacement experiment method and finite element numerical simulation method is more effective in studying the seepage of gas-water two-phase fluid in rock pores.

Key words: two-phase flow displacement, glass etching, finite element simulation, Navier-Stokes equations

中图分类号: 

  • TE341
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