Observation of the seismoelectric effect in a gas condensate field in the Earth’s natural electromagnetic and seismic noise of 0.1–20 Hz

Abstract

The first experimental measurements of the cross-correlation function (CCF) of the Earth’s seismic and electrical noise were carried out in two areas of the Minusinskoe gas condensate field in 2014 and 2015 using a VPEMPZ-M1 (Shum-6) two-channel geophysical device developed at Siberian Federal University. The Earth’s seismic noise and electrical noise in the frequency range 0.1–20 Hz were received by a geophone and an electric dipole, respectively. In both cases, a productive pool at depths of 1800–2000 m had a maximum CCF value five to seven times higher than the normal background, indicating the occurrence of the seismoelectric effect in passive fields.

Study of the Seismoelectric Effect of the Second Kind Using Molecular Sensors

“…As shown in Table 2 , obtained in 2019–2020, the experimental data confirmed the results of the measurements in 2014–2018 [ 27 , 28 , 44 , 45 , 46 , 47 ]. Figure 9 b also shows a curve obtained by solving Equations (1)–(8), according to which the values of the electric field strength E will correspond to the magnitude of the observed SE effect on the day surface.…”

“…Earlier [ 27 , 28 , 46 , 47 ], we have shown, both theoretically and empirically, that the SE effect of the second kind is most pronounced at the edges of the field. This is due to the distribution function of the electric charges along the boundaries of the field, which cause an EM field when exposed to microseismic disturbances.…”

“…The authors of this article previously conducted relevant experiments and showed that using the SE effect could be used to detect hydrocarbon deposits on land, both in passive application and in semi-active performance [ 27 , 28 ], that is, without using an active source of the EM field. This approach can significantly reduce the weight and size indicators and, as a result, the cost of exploration work.…”

“…In contrast to previously published studies [ 27 , 28 ], this work presents the modeling data and the estimation of the amplitude of the signals of seismic and EM fields in the extended frequency range from 0.1 Hz along the lower boundary. For this purpose, the SE effect observation system was implemented, in contrast to earlier experiments, on molecular fluid seismic receivers with a higher sensitivity including in the range from 0.1 Hz to 100 Hz.…”

Physical Basis of Quasi-optimal Seismoacoustic Pulse Generating for Geophysical Prospecting in Shallow Water and Transit Zones. Part 2. The Layout of Aqueous Seismic Source and the Results of Experiments

“…This will make it possible to reduce the negative acoustic effect on the environment when working in water areas and transition zone. Along with passive hydrocarbon search methods, similar studies have been actively conducted around the world in the last decade [6][7][8][9].…”