Multiple Frequency Propagation Wave Resistivity (MFPWR Resistivity®)
Dual-Frequency LWD Resistivity Tool
Product Overview
The MFPWR Resistivity® tool delivers real-time, wireline-equivalent resistivity measurements while drilling. With dual-frequency and dual-spacing transmitter-receiver design, it enables accurate formation evaluation for geosteering, reservoir characterization, casing point selection, and logging while tripping. Fully compatible with oil-based and salt-saturated muds.
Key Features
- Dual-frequency operation (2 MHz & 400 kHz) for fluid and lithology discrimination
- Quad-transmitter / dual-receiver design yields 16 raw resistivity measurements
- Eight real-time compensated curves via industry-standard mud-pulse or EM channels
- High-speed memory recall with up to 56.4 hours of full data capture
- User-selectable power options: lithium-thionyl batteries or turbine generator
Applications & Drilling Scenarios
- Real-time resistivity for geosteering and sweet spot landing
- Logging while tripping for rapid formation evaluation
- Optimal casing point selection in complex reservoirs
- Usable in oil-based, water-based, and salt-saturated mud environments
Advantages
- Delivers 8 real-time and 8 memory curves for flexible data delivery
- Independent of LCM and rotational constraints during drilling
- Enhanced reservoir evaluation when paired with LNDC and gamma ray sensors
Compatibility
Seamlessly integrates with other Frontier International LWD tools for a full triple-combo suite.
Technical Specifications
Measurement Characteristics
| Parameter | Specification |
|---|---|
| Frequencies | 2 MHz and 400 kHz |
| Transmitter-Receiver Spacings | 22.8 in (0.58 m), 39.3 in (1.0 m) |
| Compensation | Symmetrical |
| Accuracy (2 MHz Phase Shift) | ±2% up to 50 Ωm |
| Reactance Measurement Accuracy | ±10% up to 200 Ωm |
Operational Parameters
| Parameter | Specification |
|---|---|
| Maximum RPM | No limit |
| Flow Rate (varies by OD) | 150–1200 GPM |
| Temperature Rating | 347°F (175°C) |
| Pressure Rating | 20,000 psi (137 MPa) |
| Sampling Rate | 20 sec minimum (configurable) |
| Memory | 512 MB (56.41 hrs @ 12 s res.) |
General Tool Specifications
| Feature | Specification |
|---|---|
| Available Tool ODs | 3 ¾", 4 ¾", 6 ½", 8 ¼", 9 ½" |
| Tool Length (varies by OD) | 10.26–12.4 ft (3.1–3.79 m) |
| Power Input | 20–48 VDC |
| LCM Tolerance | No limit |
| Sand Content Tolerance | ≤0.5% |
Directional Capability Specifications
| Parameter | Maximum Dogleg Severity (deg/30 m) |
|---|---|
| Sliding Mode | 25–10° |
| Rotating Mode | 15–6° |