Hydraulic fracturing services, namely, scientific and technological services for oil and gas wells in the nature of detecting and sensing proppant in sub-surface formations in the nature of performing oil well diagnostics, determining and analyzing geometric data related to fractures in sub-surface formations in the nature of performing oil well diagnostics, and providing three-dimensional imaging of propped fractures in sub-surface formations in the nature of non-medical, electromagnetic imaging services for performing oil well diagnostics; Energizing and stimulating electrically-conductive proppant present in oil and gas wells and detecting electromagnetic waves emanating from energized proppant in oil and gas wells, all in the nature of performing oil well diagnostics; Technological services related to determining sub-surface fracture extent and geometry and determining proppant pack geometry in the nature of performing oil well diagnostics, and providing a three-dimensional image of a proppant pack in a sub-surface formation in the nature of non-medical, electromagnetic imaging services for performing oil well diagnostics; geometric mapping and imaging services in the nature of providing wellbore mapping services and non-medical, electromagnetic imaging services for performing oil well diagnostics; wellbore mapping and imaging services in the nature of non-medical, electromagnetic imaging services and providing wellbore mapping services for performing oil well diagnostics; mapping and imaging of propped hydraulic fractures in the nature of non-medical, electromagnetic imaging services and providing wellbore mapping services for performing oil well diagnostics