The earth's atmosphere is shown as a source of electromagnetic (EM) pulses. Some of the horizontally polarized energy that crosses the boundary between the earth's surface and the atmosphere is converted into a vertical electromagnetic field due to inhomogeneity in the subsurface: this process is known as mode rotation. The resulting vertical electromagnetic field drives a vertical current into the earth. At depth, the electromagnetic field interacts with a hydrocarbon reservoir, and part of its energy is converted through the electroseismic effect into a vertically moving seismic wave. This seismic wave is accompanied by an electromagnetic wave due to the seismoelectric effect. An electromagnetic sensor located at the earth's surface detects both the source vertical electromagnetic field as well as the response vertical electromagnetic field generated from the response seismic wave.
Copyright © 2023 Direct Solutions Land Services - All Rights Reserved.
Powered by GoDaddy