Application of high-density electrical method based on time-shift idea in fine exploration of karst in reservoir areas

Abstract

To enhance the accuracy of high-density electrical method, an innovative data processing technique has been proposed, which is implemented through time-shift processing during a single data acquisition, simplifying the complexities of traditional method. Numerical simulation of theoretical models was combined with practical application cases to explore the effectiveness in karst detection.Results indicate that the method can effectively identify faults and low-resistivity anomalies within the resistivity variation profiles. In practical cases, inversion result show a high degree of correlation with borehole data, and the resistivity variation rate is significantly related to the permeability coefficients obtained from pumping tests. Additionally, the distribution characteristics of karst features are closely linked to the local minima in the resistivity variation profiles. This method successfully reveals the distribution of underground karst fractures in the Xiliu Creek reservoir area, providing essential scientific evidence and guidance for subsequent seepage curtain construction.It also provides a new solution for the refined exploration of karst in reservoir areas using high-density electric method.

Keywords

high-density electrical method / time-shift inversion / fine / karst / reservoir area