Abstract
The article is devoted to the study of the potential possibilities of using molecular-electronic sensors of seismic waves for field work using the seismoelectric method to explore the hydrocarbon deposits. The introduction provides an analytical review of the current state of research based on data from science magazines and patents. It is shown that at present, seismoelectric effects are at the stage of experimental implementation into the practice of field work for oil and gas geophysical prospecting. Further in the article, theoretical estimates and results of mathematical modeling of the manifestation of seismoelectric (SE) phenomena in the regions of hydrocarbon anomalies are presented, numerical estimates of the values of the seismic and secondary electromagnetic fields are given. The analysis of the results (on a tank and real gas condensate field) showed that the use of molecular-electronic geophones, which have a higher sensitivity and operate in a wider frequency range (up to 0.1 Hz), allows one to obtain higher signal-to-noise ratio. Thus, it has been experimentally established that the use of molecular sensors for recording seismic electric effects when searching for deposits is more preferable when carrying out field work.
Highlights
The interaction of seismoacoustic and electromagnetic fields at the subsurface structural interfaces or in ion-conducting media was described back in the 1940s
The results showed that the active SE method allowed for the detection of hydrocarbon anomalies with a probability of at least 70%, which is almost twice as high as the results obtained by existing alternative seismic exploration methods
We employed a simplified approach for time-domain numerical simulation of the seismoelectric field, implying the successive solution of three connected partial differential equation (PDE) problems instead of a single fully coupled mechanical-electromagnetic problem similar to the one analyzed in [4]
Summary
The interaction of seismoacoustic and electromagnetic fields at the subsurface structural interfaces or in ion-conducting media was described back in the 1940s. The first to pay attention to these phenomena in rocks was the Soviet scientist Ivanov A. G. Later, the theoretical model was developed by Soviet and American researchers in 1944, Frenkel J. A. in 1956 [2], respectively, who described the effect of the electromagnetic (EM)
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