Borehole Magnetic Resonance (BMR) Tool
Advanced Water and Porosity Measurement
The Borehole Magnetic Resonance (BMR) Tool is a cutting-edge instrument for measuring water content and porosity in subsurface formations. Utilizing permanent magnets and antennas, similar to an MRI machine, the BMR tool provides lithology-independent measurements of water content above the water table and total porosity and pore size distribution below it.
This versatile tool delivers secondary measurements such as specific yield (movable water) and specific retention (bound water), and it can estimate hydraulic conductivity when combined with additional data. The BMR tool operates effectively in PVC, fiberglass, or open hole conditions, whether dry or fluid-filled, making it a valuable asset for hydrogeology, mining, and other sectors.
Features and Benefits
- Lithology-Independent Measurements: Accurately determines water content, total porosity, and pore size distribution.
- Secondary Outputs: Provides insights into movable and bound porosity and estimates hydraulic conductivity/permeability.
- Integrated Logging: Combines seamlessly with other logs for applications in geotechnical, hydrogeological, mining, and geothermal projects.
- Safe Operation: Requires no chemical sources or radiation.
The tool’s output includes detailed data tracks:
- Gamma Ray Curve: Used for depth control.
- Total Porosity (TPOR): Lithology-independent measurements.
- T2 Distribution: Includes pore size distribution and logarithmic mean T2 value.
- Fluid Volumes: Differentiates clay-bound water and free fluid.
- Hydraulic Conductivity Estimates: Calculated using Timur-Coates and SDR permeability equations.
Specifications
| Model | QL40-BMR-60 | QL40-BMR-90 |
|---|---|---|
| Tool Size | 210mm x 60mm | 2160mm x 90mm |
| Tool Weight | 19.7kg | 26kg |
| Max Pressure | 200 bar | 200 bar |
| Max Temperature | 80°C | 80°C |
| Hole Sizes | 75 – 186mm | 122 – 312mm |
| Borehole Condition | Open hole, fiberglass, PVC casing; dry or fluid-filled | Open hole, fiberglass, PVC casing; dry or fluid-filled |
| Logging Speed | 0.5–1.1 m/min (free running) | 0.5–1.1 m/min (free running) |
The BMR Tool is an indispensable instrument for advanced water and porosity analysis, offering safe, efficient, and accurate data for a range of subsurface applications. Whether for hydrogeology, mining, or geotechnical projects, this tool delivers detailed insights to support informed decision-making.
