新疆石油地质

新疆石油地质 ›› 1990, Vol. 11 ›› Issue (3): 211-215.

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应用电阻率—自然电位交会法划分油层有效厚度

陈新   

  1. 新疆石油管理局勘探开发研究院
  • 收稿日期:1990-01-05 出版日期:1990-09-01 发布日期:2020-05-15

APPLICATION OF RESISTIVITY — SPONTANEOUS POTENTIAL CROSSPLOT TO DIVIDING EFFECTIVE THICKNESS IN OIL RESERVOIR

Chen Xin   

  1. Research Institute of Exploration & Development, Xinjiang Petroleum Administration bureau
  • Received:1990-01-05 Online:1990-09-01 Published:2020-05-15

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摘要： 在储层孔隙度不变的情况下,应用电阻率—孔隙度交会法划分油层有效厚度难以区分油水层,而采用电阻率—自然电位交会法则收到了较好的效果。本文根据阿尔奇基衣公式对电阻率—自然电位交会法划分油层有效厚度的基本原理作了理论推导;并针对自然电位测井易受环境影响而降低其使用价值,将泥浆滤液电阻率校正在统一温度下,导出了自然电位的校正公式,提出了对自然电位进行环境校正的方法。以红山嘴油田南部克下组为实例,应用电阻率—自然电位交会法划分油层有效厚度,其符合率较高。

Abstract: Under certain circumstances that poresity in reservoir is constant. Rt-φ crossplot is difficult to divide effcciive thickness in oil reservoir, but Rt-SP crossplot is better. This paper infers the piinciple of Rt—SP crossplot from Aremes forinula. When SP log is effected by circumstances.as quality is reduced. By means of correcting mud filirate resistivity under unified temperature. the correction formula is derived . and the method to correct SP log is proposed. As a example. Rt—SP crossplot is applied to the south of Hong Shan Zui oil field to divide the effective thicknesse. The result is good.