Compensated Neutron Tool
Provides gas identification and measures porosity through the casing
Applications
- Through-casing porosity
- Gas identification
Features and Benefits
- Combinable with Radii® cement bond tools
- Configurable-source installation
- Slim profile
Tool Description
The Weatherford compensated neutron tool must be run in conjunction with a 2.75-in. digital gamma ray tool. It cannot be run alone.
Specifications
Ratings and Dimensions
Maximum temperature | 350°F (177°C) (for 4 hours) |
Maximum pressure | 20,000 psi (138 MPa) |
Outside diameter | 2.75 in. (69.85 mm) |
Length | 61.68 in. (1,566.67 mm) |
Weight | 60 lb (27.2kg) |
Min casing/tubing OD | 4.5 in. (115 mm) |
Max casing/tubing OD | 9.63 in. (244.6 mm) |
Tensile strength1 | Tension: 15,000 lb |
Measure points | Near detector (SS): 16.32 in. (414.53 mm) |
1Strengths apply to new tools at 70°F (21°C) and 0 psi.
Borehole Conditions
Borehole fluids | Salt, fresh, and oil |
Logging speed | Recommended: 35 ft/min (10 m/min) |
Tool positioning | Centralized, eccentralized |
Hardware Characteristics
Source type: | 15 curie Am241 Be neutron emitter |
Sensor type | One He3 Gas Detector Tube each |
Sensor spacing | Near Detector (SS): 17.5 in. (444.5 cm) |
Transmission rate | 20 frames/s |
Waveform | Digital telemetry data |
Combinability | GR, CCL (required), RADii®, CBT, digital CBT |
Measurements
Type | Neutron porosity |
Principle | Ratiometric thermal neutron detection |
Range | -3 to 60 porosity units |
Vertical resolution | Approximately 10 in. (254 mm) |
Depth of investigation | Porosity dependent, 12 in. or less (304.8 mm or less) |
Accuracy (1SD) | ± 2% |
Primary curves | Neutron API units |
Secondary curves | Detector count-rate ratio |
Calibration
Primary | University of Houston API neutron pit |
Secondary | Neutron calibration tank |
Wellsite verifier | 350-micron curie active verifier |
Reach out to optimize reservoir performance
Please fill in the form below for more information on our comprehensive and high-resolution technologies. You will hear from one of our wireline representatives shortly.
Thank you for contacting us.
Your request is being directed to the appropriate person in our organization.
We will be in touch soon.