西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

水驱实验模拟注水开发对储层的影响

史长林1,张凤红2,陈平1   

  1. 1. 中海油能源发展钻采工程研究院,天津塘沽300452;2. 中海石油(中国)有限公司天津分公司,天津塘沽300452
  • 出版日期:2013-10-20 发布日期:2013-10-20
  • 基金资助:

    国家科技重大专项课题(2008ZX05009–003)。

Affection of Simulating Water-flooding by Water Injection
Tests on Reservoir Properties

Shi Changlin1, Zhang Fenghong2, Chen Ping1   

  1. 1. CNOOC Energy Technology & Service-oilfield Engineering Research Institute,Tanggu,Tianjin 300452,China
    2. Tianjin Branch of CNOOC,Tanggu,Tianjin 300452,China
  • Online:2013-10-20 Published:2013-10-20

摘要:

通过电镜扫描、压汞实验和铸体薄片分析,研究了水驱模拟实验前后渤海湾某油田中孔中渗储层的变化情
况。实验表明,水驱前后储层物性的宏观特征、微观特征以及流体分布特征都发生了复杂的变化:水驱后储层平均
孔隙度增加,渗透率在500.0 mD 以上的样品水驱后渗透率增大,而渗透率在500.0 mD 以下的样品水驱后渗透率变
小;水驱后最大孔喉半径和孔喉平均配位数增加,而平均孔喉半径和汞饱和度中值半径却有不同程度的减小;水驱后
中—粗岩砂岩(粒度中值大于1.5 µm)储层平均孔隙直径和平均喉道直径增大,而细砂岩(粒度中值小于1.5 µm)储层
平均孔隙直径和平均喉道直径减小;水驱后储层微观均质系数减小、变异系数增大,储层非均质性增强;水驱后剩余油
主要分布于颗粒表面、粒间孔边沿、微孔及喉道等水驱未波及到的部位。

关键词: 水驱实验, 注水开发, 渗透率, 孔隙结构, 储层非均质性, 剩余油

Abstract:

With the samples of mid-porosity and mid-permeability reservoir from the oilfield in Bohai Bay,by scanning electronic
microscope,cast thin section and mercury penetration test,the changes of reservoir properties before and after water
injection simulation tests were studied. The tests indicate that the macroscopic and microscopic characteristics of and fluid
distribution characteristics of the reservoir petrophysical properties changed complicatedly after displacement with water.
After displacement with water,the average porosity and permeability of the reservoir above 500.0 mD increased while the
permeability below 500.0 mD decreased;the maximum pore throat radius and the average coordination number of pore throat
increased,but the average radius of pore throat and mercury saturation median radius had different levels of reduction;the
average diameter of pore and pore throats enlarged in the medium-coarse sandstone(median size above 1.5µm),but reduced in
the fine-grained sandstone(median size below 1.5 µm);the microscopic homogeneous coefficient of reservoir decreased while
variation coefficient increases,and the micro-heterogeneity of reservoir became stronger;the resident oil mainly distributed on
the surfaces of grains,in the corners of intergranular pores,micropores and pore throats that cannot be swept by water.

Key words: water injection simulation test, water-flooding, permeability, pore structure, reservoir heterogeneity, resident oil