三电阻率覆盖法直观识别油、水层

本文论述三电阻率覆盖法,采用测量的地层电阻率与计算的水层电阻率和油层临界电阻率覆盖,提高了直观识别砂-泥岩剖面油、水层的准确性。 油田应用实例指出,三电阻率覆盖法能够有效地直观识别砂岩和泥质砂岩油、水层,计算油层有效含水饱和度,同时还能够有效地直观识别钙质砂岩地层。

IDENTIFICATION OF OIL-AND WATER-BEARING ZONE BY 3-RESISTIVITY OVERLYING METHOD

3-Resistivity overlying method is discussed in this paper. By applying the overlying of measured formation resistivity,calculated resistivity of water-bearing zones,and critical resistivity of oil-bearing zones,the accuracy of interpretation to discriminate between oil-and water-bearing zones in shaly sand section is improved.The examples of application to the oilfields indicated that 3-resistivity overlying method can not only effectively distinguish between oil-and water-bearing zones in sand and shaly sand formations,and calculate the effective water saturation of oil-bearing zones,but also effectively identify oil-and water-bearing zones in calcareous sand formation.