Monitoring the rock decompaction dynamics by electrical prospecting methods

The dependence of the electrical conductivity of rocks on the concentration of cracks and on the amount of a high- or low-resistivity fluid filling th e cracks during decompaction is studied. The problem of magnetotelluric sou nding is solved for two horizontal fractured four-layer models. The possibi lity of monitoring the dynamics of rock decompaction with the use of magnet otelluric and transient electromagnetic methods is demonstrated. The criter ia for estimating the electrical conductivity of the crack-filling fluid ba sed on the sign of the anomalous signal of the transient field are establis hed.