Analysis of the time-frequency characteristics of seismic and electric fields over the Novomikhaylovskoye gas condensate field

Abstract

Abstract The article analyses the characteristics of seismic and electric fields over a gas condensate field. The horizontal electric component of the Earth’s electromagnetic field in the centre of the field has a pronounced frequency dependence and is localized in the frequency range up to 100 Hz. In the centre of the field, there is a fairly even electric component of the Earth’s electromagnetic field without sharp bursts and impulse noise, while from the edge of the field impulse dips of up to several seconds are observed. The high values of the seismic-electric coefficient at the Novomikhaylovskoye gas condensate field when it is calculated as the maximum of the cross-correlation function are due to the fact that the power of the recorded seismic field is more localized in the frequency spectrum up to 30 Hz and, as a consequence, when calculating the cross-correlation function, this makes the greatest contribution to its amplitude value.