Application of the Earth's Natural Electromagnetic Noise to Geophysical Prospecting and Seraching for Oil

TL;DR

This paper presents a method using multiple stations to record Earth's natural electromagnetic pulses, enabling the detection of subsurface structures and hydrocarbon pools by analyzing spatial and temporal variations in ENPEMF signals.

Contribution

It introduces a novel multi-station recording system that effectively isolates local geophysical signals from temporal variations for improved prospecting accuracy.

Findings

Successful detection of crustal heterogeneities.

Effective separation of local and remote electromagnetic pulses.

Enhanced identification of hydrocarbon-rich zones.

Abstract

When applying the Earth's natural pulse electromagnetic fields to geophysical prospecting one should take into account characteristics of their spatial and temporal variations. ENPEMF is known to include both pulses attributed to atmospheric thunderstorms and pulses generated in the lithosphere by mechanic-to-electric energy conversion in rocks. It is evident that the most valuable information on the geophysical structure of a certain area is obviously contained in pulses originated from this area. This article covers a method of recording spatial variations of the Earth's natural pulse electromagnetic fields which is able to take due account of spatial and temporal variations of EM fields and suits to reveal crustal structural and lithologic heterogeneities including hydrocarbon pools. We use a system of several stations recording the ENPEMF concurrently to erase the temporal variations from ENPEMF records and to sort out the pulses of local and remote origin. Some stations are fixed (reference) and record only temporal variations of EM fields. While the other stations are mobile and measure pulse characteristics related to both spatial and temporal ENPEMF variations along measurement routes crossing the area investigated. Spatial variations of EM fields left after having deleted the temporal variations and pulses generated out of the area investigate show the availability or the lack of geophysical anomalies.