新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (2): 173-175.

• 油藏工程 • 上一篇    下一篇

超低渗单相渗流不存在启动压力梯度的实验

谢全1, 何顺利1, 焦春艳1, 朱华银2, 吕志凯1   

  1. 1.中国石油大学石油工程教育部重点实验室,北京102249;
    2.中国石油天然气成藏与开发重点实验室,河北廊坊 065007
  • 收稿日期:2010-08-18 发布日期:2020-08-11
  • 作者简介:谢全（1981-）,男,四川简阳人,在读博士研究生,油气田开发,（Tel）13401108590（E-mail）xqeor2858@163.com.
  • 基金资助:
    国家重大科技专项（2009ZX05009–004）

Experiment on Saturated flow in Ultra-Low Permeability Reservoirs without Threshold Pressure Gradient

XIE Quan1, HE Shun-li1, JIAO Chun-yan1, ZHU Hua-yin2, LV Zhi-kai1   

  1. 1. MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
    2. Key Laboratory of Gas Reservoir Formation and Development, CNPC, Langfang, Hebei 065007, China
  • Received:2010-08-18 Published:2020-08-11

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摘要： 针对国内外超低渗饱和、非饱和渗流流体启动压力梯度研究状况,利用美国岩心公司AFS300TM 全自动岩心驱替系统,对鄂尔多斯盆地三叠系超低渗露头全直径岩心,采用非稳态法研究岩心上、下游端压力变化,分析单相标准盐水、煤油和原油渗流的启动压力梯度特征。实验结果表明,饱和渗流流体（标准盐水、煤油和原油）在超低渗介质中渗流没有明显的启动压力梯度。低渗岩心孔隙表面与标准盐水、煤油和原油的分子作用力不会导致启动压力梯度。

关键词: 超低渗, 饱和渗流流体, 非稳态法, 启动压力梯度

Abstract: According to the fundamental differences about the threshold pressure gradient existing in ultra-low permeability reservoirs given by domestic and foreign researchers, this paper proposes unsteady approach to test the threshold pressure gradient of saturated and unsaturated flow in the lab using the outcrop full-hole core with ultralow permeability of the Triassic in Ordos basin by means of fullyautomatic flooding system of AFS300TM provided by the Core Lab in U.S.A. The threshold pressure gradient in the saturated flow has been analyzed with the investigation of pressure variation from downstream and upstream of the core holder. The experimental results indicate that the threshold pressure gradient is not existent in terms of flowing of brine, kerosene and crude oil, and the interaction between the molecular of the fluid and the porous surface of the core plugs will not cause the threshold pressure gradient.

Key words: ultra-low permeability, saturated flow, unsteady state method, threshold pressure gradient

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