油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (1): 15-22.

• 油气藏评价 • 上一篇    下一篇

精控压裂薄差储层渗流特征实验研究

于倩男1,2,刘义坤1,姚迪2,刘学1,于洋2   

  1. 1. 东北石油大学石油工程学院,黑龙江 大庆 163318
    2. 中国石油大庆油田有限责任公司,黑龙江 大庆 163002
  • 收稿日期:2018-03-02 出版日期:2019-02-26 发布日期:2019-02-15
  • 作者简介:于倩男(1987—),男,在读博士后,油气藏改造与提高采收率理论与技术研究。
  • 基金资助:
    中国博士后科学基金资助项目“薄差储层压裂渗滤开发机理研究”(2018M631891);国家科技重大专项“薄差油层剩余油分布及动用界限研究”(2016ZX05010002-004);国家科技重大专项“大型压裂过程复合压裂液体系提高采收率机理”(2016ZX05023005-001-003)

Experimental study on seepage flow patterns of fine controlled fractured thin and poor reservoirs

Yu Qiannan1,2,Liu Yikun1,Yao Di2,Liu Xue1,Yu Yang2   

  1. 1. School of Petroleum Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
    2. PetroChina Daqing Oilfield Company, Daqing, Heilongjiang 163002, China
  • Received:2018-03-02 Online:2019-02-26 Published:2019-02-15

摘要:

基于平板模型模拟精控压裂薄差储层的相似理论,设计、制作得到平板模型并开展渗流特征实验,明确平板模型的压力梯度分布状况,绘制渗流特征区域划分图件,定性描述并定量表征储层渗流特征。实验结果表明:精控压裂薄差储层渗流特征受渗透性、非均质性和精控压裂措施裂缝影响,薄差储层整体渗透率低、非均质强,裂缝对渗流特征影响程度更大,精控压裂可减小薄差储层的低渗透性及强非均质性对压力传播的负面影响;薄差储层中存在不流动区、非线性渗流区和拟线性渗流区三个渗流特征区域,精控压裂使薄差储层中不流动区域面积降低超过72 %,可流动区域面积相应增加,其中更易于流体流动的拟线性渗流区面积增加86 %以上。

关键词: 渗流特征, 压力梯度, 驱替实验, 精控压裂, 薄差储层, 平板模型

Abstract:

Experiments for seepage flow patterns in thin and poor reservoirs could be carried out by the plate models made by artificial core designed based on the similarity theory. Pressure gradient distribution in fractured thin and poor reservoir by fine controlling was revealed based on the pressure data, and the sketch maps of seepage flow sections were drew to study on seepage flow patterns of fine controlled fractured thin and poor reservoir qualitatively and quantitatively. Experiment results showed that seepage flow patterns in thin and poor reservoirs were greatly influenced by permeability, heterogeneity and fine controlled fracturing cracks while the thin and poor reservoirs had low permeability and strong homogeneity. Fine controlled fracturing could reduce the negative influence of low permeability and strong heterogeneity. Thin and poor reservoirs could be divided into the non seepage flow section, the nonlinear seepage flow section and the quasi linear seepage flow section. The non seepage flow section was reduced by over 72 % after fine controlled fracturing, the area for fluid flowing through increased correspondingly, and the proportion of quasi linear percolation area which was more conducive to fluid flow raised by at least 86 %.

Key words: seepage flow pattern, pressure gradient, displacement experiments, fine controlled fracturing, thin and poor reservoir, plate model

中图分类号: 

  • TE312