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

典型低渗油区储层特征及水驱可动用性研究

杨正明1,边晨旭2,刘先贵1,王学武1   

  1. 1. 中国石油勘探开发研究院廊坊分院,河北廊坊065007
    2. 中国石油吉林油田公司,吉林松原138000
  • 出版日期:2013-12-01 发布日期:2013-12-01

Study on Water Flooding Production of Typical Low Permeability
Reservoir Feature

Yang Zhengming1, Bian Chenxu2, Liu Xiangui1, Wang Xuewu1   

  1. 1. Langfang Branch,PetroChina Exploration and Development Research Institute,Langfang,Hebei 065007,China
    2. Jilin Oilfield Company,PetroChina,Songyuan,Jilin 138000,China
  • Online:2013-12-01 Published:2013-12-01

摘要:

低渗透油藏石油探明储量逐年增加,低渗透油藏未动用储量占未动用总储量的比例较高,急需进行微观孔
隙结构方面的研究工作。在长庆和大庆外围低渗透油区大量恒速压汞和核磁共振岩芯数据的基础上,分析了不同
油区主流喉道半径、可动流体百分数与渗透率的关系及不同油区不同渗透率级别喉道半径和核磁共振T2 弛豫时间
图谱变化特征。研究表明:不同油区不同渗透率岩芯的喉道半径分布特征和核磁共振T2 弛豫时间图谱的变化特征
是不同的,可以用1.0 µm 的喉道半径所占的比例和核磁共振T2 弛豫时间图谱的左峰和右峰相互关系作为储层水驱
可动用渗透率的评价界限。在此基础上,探讨了长庆和大庆外围油区水驱开发渗透率的下限,为科学合理地开发特
低渗透油藏提供了理论基础。

关键词: 低渗透油藏, 微观孔隙结构, 核磁共振, 压汞, 水驱

Abstract:

Low permeability reserves occupied a very large proportion in our country’s proved and undeveloped reserves.
So it is urgent to research the micro pore structure characteristics of low permeability reserves. Based on a large amount of
experimental data by using constant-rate mercury penetration and nuclear magnetic resonance,the relationship between the
mainstream throat radius,the percentage of mobile fluid and the permeability of different oilfields were analyzed,and the cores
throat distribution and NMR T2 distribution with various permeability of different oilfields were studied. The results show
that there were differences in the throat distribution and NMR T2 distribution of cores from different oilfields with various
permeability,and the proportion of 1.0µm throat and the relationship of T2 left peak and right peak can be the evaluation limit
of water flooding producing. The lower permeability limit of water flooding development in Changqing Oilfield and Daqing
Oilfield were studied,which laid a solid foundation for the development of low permeability reserves.

Key words: low permeability reserves, micro pore structure, nuclear magnetic resonance, mercury penetration, water flooding