西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (4): 111-120.DOI: 10.11885/j.issn.1674-5086.2020.05.05.02

• 石油与天然气工程 • 上一篇    下一篇

泡沫在孔隙介质中的微观流动特征研究

纪佑军1, 王力龙2, 韩海水3, 蒋国斌4, 王泽根1   

  1. 1. 西南石油大学地球科学与技术学院, 四川 成都 610500;
    2. 中国石油吐哈油田公司勘探开发研究院, 新疆 哈密 839009;
    3. 中国石油勘探开发研究院, 北京 海淀 100083;
    4. 中国石油西南油气田分公司安全环保技术监督研究院, 四川 成都 610095
  • 收稿日期:2020-05-05 发布日期:2022-07-28
  • 通讯作者: 纪佑军,E-mail:jiyoujun0319@163.com
  • 作者简介:纪佑军,1983年生,男,汉族,湖北黄石人,教授,博士,主要从事地质资源与地质工程方面的研究。E-mail:jiyoujun0319@163.com
    王力龙,1996年生,男,汉族,吉林长春人,硕士研究生,主要从事地质资源与地质工程方面的研究。E-mail:779314996@qq.com
    韩海水,1985年生,男,汉族,河北秦皇岛人,博士研究生,主要从事油气田开发工程方面的研究。E-mail:254281893@qq.com
    蒋国斌,1990年生,男,汉族,江西吉安人,高级工程师,博士,主要从事含油固废处理与资源化方面的研究。E-mail:jxjajgb@163.com
    王泽根,1967年生,男,汉族,四川崇州人,教授,博士生导师,主要从事地质资源与地质工程方面的研究。E-mail:360949436@qq.com
  • 基金资助:
    国家自然科学基金(41702340);国家科技重大专项(2017ZX05013-006-002);中国石油-西南石油大学创新联合体科技合作项目(2020CX020000);生态安全与保护四川省重点实验室开放基金(绵阳师范学院)(ESP1406)

Study on Microscopic Flow Characteristics of Foam in Porous Media

JI Youjun1, WANG Lilong2, HAN Haishui3, JIANG Guobin4, WANG Zegen1   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Research Institute of Exploration&Development, Tuha Oilfield Company, PetroChina, Hami, Xinjiang 839009, China;
    3. PetroChina Research Institute of Petroleum Exploration and Development, Haidian, Beijing 100083, China;
    4. Research Institute of Safety and Environmental Protection Technology Supervision, Southwest Oil&Gas Field Company, PetroChina, Chengdu, Sichuan 610095, China
  • Received:2020-05-05 Published:2022-07-28

摘要: 泡沫在孔隙中的流动行为影响波及范围和驱油效率,对提高采收率起到重要作用。首先,建立单毛管模型,利用Level-set方法研究了泡沫在单毛管内流动的影响因素,分析了泡沫通孔隙介质中运移产生的贾敏效应、聚并机理和微观选择性运移机理,评价了不同类型泡沫的封堵性能;然后,通过XB油田岩芯的CT图像构建了真实的孔隙介质微观数值模型,研究了泡沫在其中的运移特点。结果表明,泡沫变形程度随管径比的增大而减小,润湿壁接触角对毛细管内泡沫的流变性无影响,半径1.2 μm的N2泡沫破裂时的液相流速临界值为64 mm/s;泡沫通过孔道时所受压力与其表面张力成正比,泡沫具有优先通过大孔道的微观运移特征;N2泡沫稳定性强,封堵性能好,较适合高含水期的低渗油田进行调驱,为现场采用气液分散体系进行调驱并提高采收率提供有益启示。

关键词: 泡沫, 多孔介质, 毛细管, 两相流, Level-set方法

Abstract: The flow behavior of foam in pores affects the sweep range and displacement efficiency, and plays an important role in enhancing oil recovery. Firstly, the single capillary model is established, and the level-set method is used to study the influence factors of foam flow in a single capillary tube. The Jia Min effect, coalescence mechanism and micro selective migration mechanism of foam in porous media are analyzed. The plugging performance of different types of foam is evaluated. Secondly, a real pore medium microscopic numerical model is constructed through CT image of XB Oilfield core, and the migration characteristics of foam in it are studied. The results show that the degree of foam deformation decreases with the increase of tube diameter ratio, and the contact angle of wetting wall has no effect on the rheological properties of the foam. The critical value of liquid velocity is N2 when the radius of the 1.2 foam m bubble ruptures, and the pressure of the foam passes through the channel is directly proportional to the surface tension. The foam has the microscopic migration characteristics through the large channel, and the N2 foam has strong stability and plugging property. It is suitable for profile control and flooding in low permeability oilfield at high water cut stage, which provides beneficial enlightenment for field application of gas-liquid dispersion system for profile control and oil recovery improvement.

Key words: foam, porous medium, capillary, two phase flow, Level-set method

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