Abstract: A method for reconstructing a primary voltage of a potential transformer (PT) based on an inverse black box model and an inverse electromagnetic duality model includes: collecting a secondary voltage signal of a power system by the PT, and dividing the secondary voltage signal into a low-frequency voltage component and a high-frequency voltage component; performing primary voltage reconstruction by applying the inverse black box model on the high-frequency voltage component, to obtain a primary-voltage high-frequency voltage component; performing primary voltage reconstruction by applying the inverse electromagnetic duality model on the low-frequency voltage component, to obtain a primary-voltage low-frequency voltage component; and integrating the primary-voltage high-frequency voltage component and the primary-voltage low-frequency voltage component, to obtain the primary voltage of the power system.

Abstract: A method of estimating one or more properties of an earth formation includes disposing a carrier in a borehole in an earth formation as part of an energy industry operation, receiving borehole fluid from the borehole, estimating at least one property of the borehole fluid associated with one or more intervals along the borehole, and generating a mud log that indicates values of the at least one property at the one or more intervals, the at least one property including at least one of gas content and cuttings content. The method also includes estimating, by a processor, one or more properties of the formation based on the mud log, the one or more properties selected from at least one of lithology, permeability, total organic carbon and brittleness, and controlling one or more operational parameters of the energy industry operation based on the one or more properties of the formation.

Abstract: A method of estimating one or more properties of an earth formation includes disposing a carrier in a borehole in an earth formation as part of an energy industry operation, receiving borehole fluid from the borehole, estimating at least one property of the borehole fluid associated with one or more intervals along the borehole, and generating a mud log that indicates values of the at least one property at the one or more intervals, the at least one property including at least one of gas content and cuttings content. The method also includes estimating, by a processor, one or more properties of the formation based on the mud log, the one or more properties selected from at least one of lithology, permeability, total organic carbon and brittleness, and controlling one or more operational parameters of the energy industry operation based on the one or more properties of the formation.