石油学报 ›› 2012, Vol. 33 ›› Issue (3): 453-458.DOI: 10.7623/syxb201203016

• 油田开发 • 上一篇    下一篇

特低渗透砂岩大型露头模型单相渗流特征实验

徐 轩 1,2 刘学伟 2 杨正明 2 薛成国 1,2 滕 起 1,2 徐 依 3   

  1. 1中国科学院渗流流体力学研究所 河北廊坊 065007; 2中国石油勘探开发研究院廊坊分院 河北廊坊 065007; 3 长江大学地球科学学院 湖北荆州 434023
  • 收稿日期:2011-11-27 修回日期:2012-02-09 出版日期:2012-05-25 发布日期:2012-07-20
  • 通讯作者: 徐 轩
  • 作者简介:徐 轩,男,1984年10月生,2007年毕业于中国地质大学(武汉),现为中国科学院渗流流体力学研究所在读博士研究生,主要从事低渗透油藏渗流理论及开发方面的研究工作。
  • 基金资助:

    国家重大科技专项“特低渗透油藏有效补充能量开发技术”(2011ZX05013-006)资助。

An experimental study on single-phase seepage characteristics with a large-scale model made of ultra-low permeability sandstone outcrops

XU Xuan 1,2 LIU Xuewei 2 YANG Zhengming 2 XUE Chengguo 1,2 TENG Qi 1,2 XU Yi 3   

  • Received:2011-11-27 Revised:2012-02-09 Online:2012-05-25 Published:2012-07-20

关键词: 天然砂岩露头, 大型平板模型, 非线性渗流, 压力梯度场, 流场

Abstract:

On the basis of the electrode-system measurement principle of resistivity logging,a method to measure the flow field of a flat model was established. A single-phase seepage experiment on ultra-low permeability reservoirs was performed with a large-scale flat model made of ultra-low permeability sandstone outcrops. The experiment measured single-phase seepage curves, the pressure gradient field and the flow field of the flat model. Seepage areas of the flat model were divided into immobile, no-linear and quasi-linear seepage areas by using the pressure gradient field and no-linear seepage curves of small rock samples. The result shows that the flat seepage in ultra-low permeability porous media is no-linear and the apparent permeability of the flat model increases with increasing the injection/production drawdown. There is an unswept area in the plane flow field, the plane seepage area changes with increasing the injection/production drawdown of the flat model, and consequently the unswept area in the flow field will disappear.

Key words: sandstone outcrop, large-scale flat model, no-linear seepage, pressure gradient field, flow field