石油学报 ›› 1985, Vol. 6 ›› Issue (2): 39-50.DOI: 10.7623/syxb198502006

• 论文 • 上一篇    下一篇

电阻率浮动比值法 泥质砂岩油气、水层一个有效的评价新技术

谭廷栋, 张龙海   

  1. 石油勘探开发科学研究院
  • 收稿日期:1984-02-29 出版日期:1985-04-25 发布日期:2013-07-08

“FLOATING RESISTIVITY RATIO METHOD”——A NEW TECHNIQUE FOR EVALUATION OF SHALY SANDSTONES CONTAINING OIL, GAS AND WATER

Tan Tingdong, Chang Longhai   

  1. Scientific Research Institute of Petroleum Exploration and Development
  • Received:1984-02-29 Online:1985-04-25 Published:2013-07-08

摘要: 据统计,砂岩油气藏约有70%的储集层含泥质。泥质砂岩油气、水层之间的电阻率差异小,分辨率低,采用传统的电阻率比值法评价油气层,有时候会得出悲观的结论。本文论述的电阻率浮动比值法,使泥质砂岩油气、水层的电阻率比值分辨率与纯砂岩油气、水层的电阻率比值分辨率保持一致,提高了油气、水层解释的直观性。经应用表明,电阻率浮动比值法是泥质砂岩油气、水层一个有效的评价新技术,特别适用于探井油气层乐观评价,减少泥质砂岩油气层被漏掉的可能性;同时又能避免水层解释为油气层。本文给出了电阻率浮动比值法的应用实例。

关键词: 泥质砂岩, 束缚水饱和度, 视电阻率, 油气层, 临界电阻, 比值法, 电阻率比值, 地层电阻率, 评价新技术, 有效孔隙空间

Abstract: Statistics reveal that about 70% of reservoirs in sanostone oil and gas pools contain shales. In addition to low resolution, there is slight difference in the resistivity of shaly sandstone formations containing oil and gas and water.Such being the case,application of the conventional resistivity ratio method may sometimes lead to discouraging conclusion. In this paper, the authors have proposed the "floating resistivity ratio method" to make the resolution consistent with that for clean sandstone formations containing oil and gas and water and to improve the efficiency of interpretation of oil and gas and water bearing formations. From practice, it has proved that the method can reduce the chances of missing any pay zones or mistaking an aquifer for a pay zone, Examples are given for illustration.