西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

低阻环带的形成、识别与分析

廖东良1,2   

  1. 1.“油气资源与探测”国家重点实验室· 中国石油大学(北京),北京昌平102249
    2. 中国石化石油工程技术研究院,北京朝阳100101
  • 出版日期:2014-02-01 发布日期:2014-02-01

Formation,Recognition and Analysis of Low-resistivity Annulus

Liao Dongliang1,2   

  1. 1. State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum(Beijing),Changping,Beijing 102249,China
    2. Research Institute of Petroleum Engineering,SINOPEC,Chaoyang,Beijing 100101,China
  • Online:2014-02-01 Published:2014-02-01

摘要:

低阻环带是可动用油气显示的有力证据,也是判断油气层,尤其是低电阻率油气层的有效手段。从油水两相
渗流方程出发,推导出了油、水相在泥浆侵入过程中的渗流推进速度,分析了低阻环带的形成过程。高频感应仪器能
同时测量5 条电阻率曲线,从曲线之间的关系能看出低阻环带有3 种表现形式,分别是R07 最低、R10 最低、R14 最低,
通过这3 种形式可以分析低阻环带的形成过程和储层特性。分别给出了低阻环带3 种形式的实例及高频感应处理结
果,结果显示,根据高频感应测井能直观探测出低阻环带的特性,可快速地判断储层为油层、水层和油水同层。

关键词: 低阻环带, 相渗透率, 渗流方程, 高频感应, 侵入深度

Abstract:

The low-resistivity annulus is the strong evidence of available oil and gas,and the effective means of judgement of
oil and gas layer,especially the low resistivity oil and gas layer. Based on the flow equations of oil and water two phases,the
seepage driving velocity is derived during mud filtrate invaded formation,and the process of forming low-resistivity annulus
was analyzed. The high frequency induction log can get five resistivity curves at one time. From the reaction of the curves,we
can see there are three manifestations for low-resistivity annulus and they are R07 the lowest,R10 the lowest,R11 the lowest,
respectively. The paper analyzed the formation process of low-resistivity annulus and reservoir characteristics through the three
manifestations. Some examples of the three manifestations of low-resistivity annulus and the process result from high frequency
induction log were presented,the results shows that we can quickly tell the reservoir is oil layer,water layer or oil-water layer.

Key words: low-resistivity annulus, relativity permeability, flow equation, high frequency induction log, invasion depth