COMPARATIVE ANALYSIS OF CONVENTIONAL SEISMIC SURVEY WITH PASSIVE SEISMOELECTRIC EXPLORATION AT GAS CONDENSATE FIELD

Abstract

The main objective of this work is the comparison of experimental observations by means of
the passive seismoelectric method at Bystryanskaya gas condensate field (Krasnoyarsk krai) with the profile
acquired by the conventional seismic survey as well as the analysis of the influence of atmospheric electricity
on measurements. This article simulates and estimates the influence of atmospheric electricity on the natural
Earth's electromagnetic field using calculated data. Measurements by the passive seismoelectric method were
carried out in July 2018 using three-electrode facility comprised of a grounded electric dipole with the length
of 200 m and a seismic receiver installed at the dipole center. Fields were recorded in the frequency range of
0.1–20 Hz. According to the data of exploratory drilling, the productive formation was at the depth of 2–2.5
km, which corresponded to the signal delay of 1.2–1.6 s. The boundaries of productive formation were detected
by the seismoelectric method: 0.15–0.25 of a maximum of cross-correlation function at signal-to-noise ratio
equaling to 4.