One of the most relevant energy vectors in Argentina’s development and economy is the exploitation of hydrocarbons from unconventional reservoirs, such as those found in the Neuquén Basin, particularly Vaca Muerta. Conventional reservoirs are composed mainly of compacted sandstones with high porosity and permeability, whereas shale-type rocks exhibit very low connectivity, requiring hydraulic fracturing for their exploitation. A second major difference is the large amount of solid organic matter present in these reservoirs, known as kerogen, which is the source of hydrocarbon generation. Its characterization and quantification are of paramount importance for evaluating potential productivity and the type of recoverable hydrocarbon. In this talk, we discuss two main issues: the characterization of kerogen maturity, which is an indicator of the production window, which may correspond to oil, gas, or an intermediate phase known as condensate. Rapid methods based on 1H detection are compared with traditional 13C CPMAS measurements. Another technique that is fundamental in the petroleum industry is the determination of fluids contained within the rock; for this purpose, the industry standard involves the use of equipment operating at magnetic fields of 0.05 - 0.5 T. We will present results to overcome limitations for probing both solid and liquid components in shale rocks.