Natural gas (NG) plays a key role in the transition to greener energy sources. Accurate composition analysis is essential for determining NG’s commercial value and ensuring efficiency across the entire value chain. Since NG typically contains water, it is dehydrated using agents like triethylene glycol (TEG). However, residual liquid TEG may remain in the pipeline, compromising sample quality for conventional NG composition analysis, which can measure only the gaseous phase. Thus, this work demonstrates the applicability of high-pressure (HP) benchtop 1H NMR spectroscopy for analyzing wet NG, with the simultaneous detection of gas and liquid phases. To enhance the robustness of the method, additional quality control parameters (QC) for the NMR signal were implemented alongside with previously established QCs. The methodology was validated using a three-component NG sample at 200 bar, in the presence of TEG as dynamic droplets and at varying stationary amounts within the sensitive volume. The determined NG composition was in excellent agreement with the vendor certificate. Moreover, the detection and quantification limits of TEG under the employed experimental conditions were determined. This work represents a significant step towards the integration of HP benchtop NMR spectroscopy for real-time monitoring of wet NG composition in industrial environments.