RAS™ Reservoir Analysis Sonde – Sigma
Measures reservoir saturation using Sigma techniques
Applications
- Reservoir monitoring
- Formation evaluation
- Wellbore performance and integrity
- Primary reservoir description where openhole logging is constrained
Features and Benefits
- Short 3-detector PNG tool
- Improved wellsite safety
- Surface read out (SRO) and memory compatible
- Combinable with all high-speed digital (HD) products
- Sigma and water flow available in SRO and memory modes (mixed modes supported in memory)
Tool Description
The Weatherford RAS Reservoir Analysis Sonde – Sigma is a multidetector pulsed-neutron tool for measuring reservoir saturation using source and detector technologies more suitable for specific markets.
The sonde features an array of three sodium-iodide (NaI) detectors. The Sigma measurement is based on the near and far spacings, the long spacing is sensitive to porosity and gas saturation.
The tool also operates in oxygen activation mode to determine water phase velocity (water-flow mode) and can be combined with up to four gamma ray-CCL (-GCL) tools for this application.
The RAS003 is an HD platform tool and combinable with other HD tools such as spectral gamma, RADii®, ProMAC™, and production logging tools.
Specifications
Ratings and Dimensions
Outside diameter | 1.69 in. (43 mm) |
Length | 140.7 in. (3,573 mm) |
Weight | 51 lb (23 kg) |
Maximum temperature | 320°F (160°C) |
Maximum pressure | 15,000 psi (103.4 MPa) |
Measure points | Near: 80 in. (2,032 mm) |
Materials | Corrosion-resistant materials used throughout |
Hardware Characteristics
Source type | 3-detector array includes time and energy spectra |
Sensor type | Sodium-Iodide detectors |
Acquisition mode | Real time with ICU |
Measurements
Type | Sigma, oxygen activation, inelastic gas |
Reach out to optimize reservoir performance
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