NMR-M 1D/2D Interpretation Service

April 2024, Geo-Vista used PIView Software (NMR 2D/3D) completed a 1D/2D Nuclear Magnetic Resonance (NMR-M) interpretation project in China. The borehole well was 8.5 inches, 110°C, oil-based mud.
The one-dimensional processing results indicated that certain intervals showed delayed T2 distributions and pronounced spectral tailing, suggesting the presence of light oil. Below 4235 meters, the T2 spectrum shifted significantly to the left, indicating water-bearing characteristics.
The two-dimensional NMR-M analysis revealed very low hydrocarbon saturation in the flushed zone, implying efficient displacement of reservoir fluids by mud filtrate, predominantly manifesting as water signals. However, clear oil signal trends were observed on the two-dimensional imaging map in the intervals of 4190-4193 meters, 4210-4214 meters and 4222-4224 meters. Subsequent testing confirmed oil production at depths of 4223 meters, 4212 meters and 4192 meters.
This project demonstrated the effectiveness of combining one-dimensional and two-dimensional NMR-M techniques for accurate hydrocarbon detection and characterization, even under challenging downhole conditions.