Natural Source Electromagnetic Component Exploration of Coalbed Methane Reservoirs

As an environmentally friendly and high-calorific natural gas, coalbed methane (CBM) has become one of the world’s most crucial unconventional energy sources. Undoubtedly, it is necessary to conduct in-depth research on reservoir exploration methods ensure high stable CBM production in development stage. However, current have disadvantages such as cost, complex devices, poor terrain adaptability, therefore they are unsuitable for reasonable monitoring reservoirs. In contrast, electromagnetic prospecting increasingly widely employed rapid delineation conductive distributions, contributing a lot in-situ interpretation. Furthermore, source Super-Low Frequency component method (i.e., SLF short) been proposed applied with potential enrichment area, Qinshui Basin, China. this paper, thoroughly discussed. The magnetic responses can be used characteristic subsurface layers, forward modeling algorithms using finite element successfully developed verified. On basis, direct depth transformation one-dimensional nonlinear regularization inversion geo-object With help empirical mode decomposition (EMD), data processing workflow demonstrated theoretically practically, which integrated into portable instrument. instrument’s ability identify low-resistivity reservoirs their surrounding rocks proved by field survey. extraction radiation (EMR) anomalies also helps refine interpretation higher accuracy. A joint comparative test between audio-magnetotelluric (AMT) addressed, demonstrating that reliably applicable survey preliminary statistical analysis shows resolution reach order tens meters. Therefore, expected options cost-effective capability.