Modeling of Sources in the Time Domain - Practical Example with Vertical-Vertical Controlled-Source Electromagnetic Method

Abstract

The challenge in transient method modeling is, precisely, to simulate the response of the fading of the electromagnetic field (EM) and its interactions with the subsurface in the face of physical property contrasts. The study herein displays the result of the time domain modeling of the vertical-vertical controlled-source electromagnetic method (VVCSEM), written in Python, looking to analyze the responses of electromagnetic fields in different models and configurations while not requiring significant knowledge of scientific programming or financial resources for proprietary software licenses. A canonical geological model was used to analyze the field behavior. The codes were published under a permissive open-source license and made available on the Zenodo platform and GitHub repository. The VVCSEM modeling using Jupyter notebooks (Anaconda) proved accessible, efficient in detecting proposed resistive anomalies, as expected, and reliable, compared to the literature descriptions.