Fine Detection and Analysis of Hidden Karst in Wellsite with Quasi-Three-Dimensional TDEM Based on Lateral Constraint

Figure 8

Karst development characteristics of TDEM resistivity inversion profile in well QM2 (the area delineated by the blue line is a low-resistivity anomaly; Figure 6(e) shows that the farther away from the collapse, the higher the resistivity and the smaller the anomaly scale. Figure 6(e) shows that the closer to the collapse pit, the lower the resistivity and the larger the anomaly scale).