TruSight
Intelligent slimhole MWD service
Eliminates static survey time and unlocks high-speed telemetry in challenging environments
ResSight
High-accuracy resistivity LWD service
Applications
- Well placement
- Accurate formation evaluation in all mud types
- Water saturation estimation
- Pore pressure monitoring for mud weight optimization
Benefits
- Improved measurement quality and accuracy
- Provides resistivity measurements across wide range of formation and mud resistivity
- Multiple depths of investigation—two frequencies and five transmitter-receiver spacing
- Reliable measurement at high temperature
Features
- Borehole compensated resistivity measurement
- Low-noise electronics with improved signal-to-noise ratio
- Compact integrated tool design
- High temperature rating up to 175 degC
- Slimhole design 5?–6? in
How it improves performance
The ResSight? high-accuracy resistivity LWD service improves reservoir understanding and drilling performance by providing reliable multidepth resistivity measurements in real time while drilling. These measurements help identify formation boundaries, distinguish hydrocarbon- and water-bearing zones, and estimate water saturation more accurately. The information supports better well placement, early detection of pressure changes for mud weight optimization, and faster drilling decisions, ultimately reducing uncertainty and improving drilling efficiency.
How it works
The ResSight service measures resistivity at two frequencies—2 MHz and 400 kHz—using five geometrically distributed transmitter-receiver spacings. Multiple operating frequencies combined with physically compensated antennas reduce borehole rugosity effects on the measurement quality. Signal digitization at the receiver, advanced application-specific integrated circuit (ASIC) electronics, and optimized electronics-gain management significantly reduce noise, improving both measurement precision and accuracy. Multiple depths of investigation also allow to monitor invasion and other borehole changes over time.
What it replaces
ResSight service combined with the TruSight? intelligent slimhole MWD service replaces the ImPulse? integrated MWD platform and provides improved propagation-resistivity measurement range and accuracy using two frequencies (2 MHz and 400 kHz) and five geometrically distributed spacings.
Specifications | |||
| Measurement Specifications | |||
| Resistivity | Accuracy | Range, ohm.m | |
| Phase shift resistivity | 2 MHz | ±2% ±0.16 mS/m | 0.2–120 120–3,000 |
| 400 kHz | ±2% ±1 mS/m | 0.1–20 20–300 | |
| Attenuation resistivity | 2 MHz | ±3% ±0.7 mS/m | 0.2–50 50–100 |
| 400 kHz | ±3% ±4 mS/m | 0.1–10 10–30 | |
| Downhole Memory | |
| Recording time | 750 operating hours |
| Power supply | 糖心传媒 MWD service |
| Combinability | Fully combinable with all 糖心传媒 tools |
| Mechanical Specifications | |
| Nominal OD, in | 4.75 |
| Maximum OD (wear band), in | 5.3 |
| Hole size, in | 5?–6? |
| Tool length (without crossover), ft | 13.24 |
| Weight, lbm [kg] | 660 [272] |
| Top thread connection | NC38 (3? IF) Box |
| Bottom thread connection | NC38 (3? IF) Box |
| Max. operating temperature, degC [degF] | 175 [347] |
| Mud | WBM, OBM, synthetic-based mud (SBM) |
| Max. operating pressure, psi [MPa] | 25,000 [172.37] |
| Max. flow range, galUS/min [L/min] | 360 [1,363] |
| Max. dogleg severity sliding, °/ft [°/m] | 30/100 [30/30] |
| Max. dogleg severity rotating, °/ft [°/m] | 15/100 [15/30] |
| Max. WOB, klbf | 50 |
| Max. rotary torque, ft.lbf | 8,000 |
