4D Active Time Constrained Resistivity Inversion

In this work an improved 4d technique for inverting monitoring resistivity data is examined and compared with the existing inversion schemes. Synthetic data tests illustrate that the time-lapse images of ERT data are affected by inversion artifacts.4D Active Time Constrained (4D-ATC) technique minimize those artifacts while producing realistic inversion models. Several comparative synthetic tests have been made between the techniques. Further, the presented algorithm is tested on field studies. The results demonstrate that this technique produces in most cases improved time-lapse images in relation with existing techniques.