Application of Low-Field Magnetic Resonance Technology in Coalbed Methane Exploration and Development

Imaging visualization: Enables 2D imaging at any layer, pore structure visualization, and 2D imaging of fluid distribution changes during displacement;

Online displacement experiments: With Numay Technology’s proprietary high-temperature, high-pressure core holder, reservoir conditions can be simulated to study gas adsorption under different temperature and pressure conditions. This allows real-time analysis of water-gas and gas-water displacement processes and investigation of fluid flow mechanisms.

Advantages of Low-Field NMR Technology:

 

Fast: No special sample preparation is required. The detection process is simple, providing immediate results and real-time insights into sample changes.

Non-destructive: The testing process causes no damage to the sample, ensuring production continuity and enabling online measurements.

Eco-friendly: Completely safe for humans with magnetic fields below 0.5T and internal shielding. NMR testing eliminates the need for chemical extraction agents, promoting health and environmental protection.

Experimental Study:

 

The six images correspond to: Coronal view (front, middle, rear) and Axial view (lower, middle, upper). The white areas within the red circles indicate fractures.

Sample name: Coal core (cylindrical specimen, 25mm diameter × 40mm height)

Experimental equipment: Full-diameter core NMR imaging analysis system

 

Coalbed methane, commonly known as “gas,” is a self-stored natural gas generated during the coal formation process and adsorbed within the coal seam. China possesses abundant coalbed methane resources, comparable in quantity to conventional onshore natural gas, ranking third globally after Russia and Canada. Developing this emerging energy source is of great significance for addressing the energy supply-demand gap in the national economy, optimizing China’s energy structure, reducing coal mine gas hazards, and improving air quality.

Numay Low-Field NMR Equipment Solutions:

 

Relaxation spectrum analysis: Provides detailed information on coal porosity, pore size distribution, permeability, and relative fluid saturation;

Imaging visualization: Enables 2D imaging at any layer, pore structure visualization, and 2D imaging of fluid distribution changes during displacement;

Online displacement experiments: With Numay Technology’s proprietary high-temperature, high-pressure core holder, reservoir conditions can be simulated to study gas adsorption under different temperature and pressure conditions. This allows real-time analysis of water-gas and gas-water displacement processes and investigation of fluid flow mechanisms.

Advantages of Low-Field NMR Technology:

 

Fast: No special sample preparation is required. The detection process is simple, providing immediate results and real-time insights into sample changes.

Non-destructive: The testing process causes no damage to the sample, ensuring production continuity and enabling online measurements.

Eco-friendly: Completely safe for humans with magnetic fields below 0.5T and internal shielding. NMR testing eliminates the need for chemical extraction agents, promoting health and environmental protection.

Experimental Study:

 

The six images correspond to: Coronal view (front, middle, rear) and Axial view (lower, middle, upper). The white areas within the red circles indicate fractures.

Sample name: Coal core (cylindrical specimen, 25mm diameter × 40mm height)

Experimental equipment: Full-diameter core NMR imaging analysis system