西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (6): 117-123.DOI: 10.11885/j.issn.1674-5086.2016.05.01.01

• 石油与天然气工程 • 上一篇    下一篇

各向异性油藏中五点井网的变形作用

谢伟伟1,2, 王晓冬1,3, 牛丽娟4   

  1. 1. 中国地质大学(北京)能源学院, 北京 海淀 100083;
    2. 非常规天然气地质评价与开发工程北京市重点实验室, 北京 海淀 100083;
    3. 国土资源部页岩气资源战略评价重点实验室, 北京 海淀 100083;
    4. 中国石油大庆油田有限责任公司试油试采分公司, 黑龙江 大庆 163412
  • 收稿日期:2016-05-01 出版日期:2017-12-01 发布日期:2017-12-01
  • 通讯作者: 王晓冬,E-mail:wxd_cug@cugb.edu.cn
  • 作者简介:谢伟伟,1990年生,女,汉族,河南许昌人,博士研究生,主要从事油气渗流力学和油藏数值模拟方面的研究。E-mail:15120077426@163.com;王晓冬,1964年生,男,汉族,黑龙江延寿人,教授,博士,主要从事油气渗流力学、油藏工程以及油藏数值模拟等方面的教学和科研工作。E-mail:wxd_cug@cugb.edu.cn;牛丽娟,1965年生,女,汉族,吉林白城人,高级工程师,博士,主要从事试油工艺、油藏评价方面的科研和理论研究工作。E-mail:niulijuan@petrochina.com.cn
  • 基金资助:
    国家科技重大专项(2016ZX05060)

Deformation of Five-spot Well Patterns for Anisotropic Oil Reservoir

XIE Weiwei1,2, WANG Xiaodong1,3, NIU Lijuan4   

  1. 1. School of Energy Resources, China University of Geosciences, Haidian, Beijing 100083, China;
    2. Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Haidian, Beijing 100083, China;
    3. Key Laboratory Strategy Evaluation for Shale Gas, Ministry of Land and Resources, Haidian, Beijing 100083, China;
    4. Oil Test and Production Branch Company, Daqing Oilfield Co. Ltd., PetroChina Daqing, Heilongjiang 163412, China
  • Received:2016-05-01 Online:2017-12-01 Published:2017-12-01

摘要: 针对各向异性油藏中水驱开发的研究主要集中于各向异性方向垂直或平行于井网单元中任意两口井的连线方向等特殊的情形,而对于其他布井方向的研究相对缺乏的这种情况,采用坐标变换方法将各向异性油藏转化为各向同性油藏,然后利用流线方法计算正五点井网的开发指标,分析了各向异性程度和方向对水驱开发效果的影响。结果表明,在各向异性油藏中,各向异性程度越大,井网的变形程度也越大;当井网单元中任意两口井的连线与渗透率主轴方向既不平行又不垂直时,井网开发效果对各向异性程度的变化反应十分敏感,井网单元可能会发生的破坏和重组现象,这种破坏和重组现象是各向异性方向和大小两者共同作用的结果,从而造成了井网开发效果的不确定性。为了有效避免可能发生的井网的破坏和重组现象,布井时最好选择注水井生产井方向或者注水井注水井方向平行或者垂直于渗透率主轴方向。

关键词: 各向异性, 五点井网, 变形, 流线, 波及效率

Abstract: Existing researches of anisotropic oil reservoir mainly focus on two special types of well patterns in which the injectorto-producer or producer-to-producer direction is parallel to the principal permeability direction, and the studies concentrating on other types of well patterns are rare. The primary reason is that other types of well patterns might increase the uncertainty of development effect. Based on coordinate transformation method, the real anisotropic oil reservoir can be converted into a equivalent isotropic oil reservoir, and the flow field and development indexes of well pattern can be also calculated, and on this basis, the impact of the degree and direction of anisotropy on the development effect can be analyzed. Research results indicate that the existence of directional permeability can lead to deformation, even destruction and reconstruction, of original well pattern flooding units, when the principal permeability direction is neither parallel nor perpendicular to the injector-producer direction and injector-injector direction. The destruction and reconstruction of well patterns is a consequence of the anisotropic degree and the relative angel between anisotropic direction and well line direction, thereby resulting in the uncertainty of well patterns development effect. In anisotropic reservoir, the degree of anisotropy is greater, the deformation effect of well patterns is severer, and the development effect of well pattern is more sensitive to the change of angle between maximum principal permeability direction and well line direction. To avoid the occurrence of destruction and reconstruction effectively, the best choice for pattern configuration is making sure that the injector-to-producer or producer-to-producer direction is parallel to the principal permeability direction.

Key words: permeability, anisotropy, five-spot well network, destruction and reconstruction, streamline

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