Application of “K” Reflection Coefficient Method in Low Resistivity Geological Background

WU Jian-Qiang

doi:10.3969/j.issn.2097-0013.2022.02.012

2022 Vol. 38, No. 2

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WU Jian-Qiang. 2022. Application of “K” Reflection Coefficient Method in Low Resistivity Geological Background. South China Geology, 38(2): 312-320. doi: 10.3969/j.issn.2097-0013.2022.02.012

Citation:

WU Jian-Qiang. 2022. Application of “K” Reflection Coefficient Method in Low Resistivity Geological Background. South China Geology, 38(2): 312-320. doi: 10.3969/j.issn.2097-0013.2022.02.012

Application of “K” Reflection Coefficient Method in Low Resistivity Geological Background

WU Jian-Qiang¹

1. Wuhan Center of Geological Survey (Central South China Innovation Center for Geosciences), Wuhan 430205, Hubei, China
2. Zhejiang Engineering Geophysical Prospecting and Design Institute Co., Ltd, Hangzhou 310000, Zhejian, China
3. Institute of Karst Geology, GAGS, Guilin 541004, Guangxi, China

Received Date: 25 January 2022

Revised Date: 26 March 2022

Abstract

Abstract

High density resistivity method is widely used because of its low cost and high efficiency. For areas with low resistivity of large background, such as Cretaceous siltstone, it is found that the effect is not satisfactory, even the effective anomalies cannot be distinguished on some occasion. Based on this, this study compares the results of high-density resistivity method with those processed by “K” reflection coefficient method through two examples with different geological backgrounds. The results show that, (1) Comparing with the apparent resistivity profile, the “K” profile obtained by the “K” reflection coefficient method can effectively amplify the deep geological weak signal and highlight local anomalies, and the gained abnormal location corresponds well with the drilling results; (2) Compared with the single apparent resistivity sounding curve at the drill hole, the single “K” curve obtained by the “K” reflection coefficient method provides finer interpretation and higher resolution.
- “K” reflection coefficient method /
- apparent resistivity profile /
- single apparent resistivity sounding curve /
- single “K” curve /
- “K” profile

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References

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