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

固相颗粒对低渗透砂岩油藏注水开发影响研究

伍家忠1,孟红丽2,徐杰3,谢全1,施雷庭2   

  1. 1.“提高石油采收率”国家重点实验室中国石油勘探开发研究院,北京海淀100083
    2.“油气藏地质及开发工程”国家重点实验室西南石油大学,四川成都610500
    3. 中国寰球工程公司新疆分公司,新疆克拉玛依833600
  • 出版日期:2014-02-01 发布日期:2014-02-01
  • 基金资助:

    中央财政支持地方高校发展专项资金“石油与天然气工程国家一级学科”(P014)。

Study on the Effect of Solid Particle on Water-flooding Development in
Low Permeability Sandstone Reservoir

Wu Jiazhong1, Meng Hongli2, Xu Jie3, Xie Quan1, Shi Leiting2   

  1. 1. State Key Laboratory of Enhanced Oil Recovery,Research Institute of Petroleum Exploration & Development,PetroChina,Haidian,
    Beijing 100083,China
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    3. China Huanqiu Contracting & Engineering Company,Karamay,Xinjiang 833600,China
  • Online:2014-02-01 Published:2014-02-01

摘要:

注入水中的固相颗粒直接影响低渗透砂岩油藏的注入压力和储层伤害程度。研究了3 种注入水(所含固相颗
粒累积粒度分布达到90% 时所对应粒径分别为1.24,5.05,9.91µm)的注入性和对油相渗透率的伤害程度,并考察其
对采收率的影响。结果表明:渗透率小于1.000 mD 的岩芯,注入水中固相颗粒的累计粒度分布达到90%(D90)的粒径
大于1.00 µm 时,严重影响了其注入性;在渗透率大于1.000 mD 的岩芯中,3 种注入水均具有较好的注入性。随着固
相颗粒D90 粒径的增大,岩芯油相渗透率的伤害程度增大,水驱采收率降低;随着岩芯渗透率的增加,较大粒径的颗粒
堵塞岩芯中小孔隙的油流通道,降低了水驱波及能力。结合固相颗粒D90 粒径的渗透率伤害率图版,岩芯渗透率大于
10.000 mD 时,注入水中的颗粒D90 粒径可以适当放宽到5.00µm。

关键词: 固相颗粒, 粒径, 渗透率, 注入性, 渗透率伤害图版

Abstract:

The solid particles in the injecting water directly affect injection pressure and the degree of formation damage in
low permeability sandstone reservoir. The paper studied the injection of three different sizes of solid particle,whose D90(the
cumulative particle size distribution of solid particle in the injecting water exceeds 90%)is 1.24,5.05,9.91µm. and we studied
three kinds of injectivity water for the degrees of damage on oil phase permeability,and investigate the impact on the recovery.
The results show there are problems on injectivity in core of permeability less than 1 mD when particle size,D90,is larger than
1 µm. However,when the permeability of core is larger than 1 mD,the problem goes away. As D90 increases,the degrees
of oil permeability damage increases and the water flooding recovery reduces. As the permeability grows,the solid particle of
larger particle size plugs the flowing channel in small and medium-sized pores,reducing water-flood sweeping ability. Seen
from chart of permeability damage,when the core permeability is greater than 10 mD,the particle size,D90,can be 5 µm.

Key words: solid particle, particle size, permeability, injectivity, chart of permeability damage