RAS™ Reservoir Analysis Sonde


Multimode pulsed-neutron service for robust reservoir monitoring


Applications

  • Reservoir monitoring
  • Formation evaluation
  • Wellbore performance and integrity
  • Primary reservoir description where openhole logging is constrained


Features and Benefits

  • Shortest available three-detector PNG tool
  • Improved wellsite safety
  • Surface read out (SRO) and memory compatible
  • Combinable with all HD products
  • Sigma, carbon-oxygen, and water flow available in SRO and memory modes (mixed modes supported in memory)
  • Combinable with ArrayPro and PL for a short-advanced CH-FE combination
  • Long generator life


Tool Description

The Weatherford RAS reservoir analysis sonde is a three-detector, pulsed-neutron, corrosion-resistant logging tool that measures gas, oil, and water saturation.

It features three gamma detectors. The near and the far detectors are high-resolution lanthanum-chloride detectors for Sigma and carbon-oxygen, and the long spacing sodium-iodide detector provides gas and porosity measurements. An available variant is a Sigma-only alternative, more suitable for specific markets.

Combining advanced cased-hole formation evaluation with well integrity services and production logging, the RAS adds value for zone isolation, water and fluid management, and well stability/productivity applications.

The internal temperature is recorded to nonvolatile memory, enabling maintainable temperature exposure records. The neutron generator life provides high performance, increasing ROI.


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)

Pressure range

15,000 psi (103.4 MPa)

Materials

Corrosion-resistant materials
used throughout

Measure points

Near: 80 in. (2,032 mm)
Far: 87 in. (2,210 mm)
Long: 95 in. (2,413 mm)

 

Borehole Conditions

Borehole fluids

OBM and WBM

 

Hardware Characteristics

Source type

3-detector array includes time and energy spectra

Sensor type

High-resolution lanthanum chloride

Acquisition mode

SRO or memory

 

Measurements

RAS002

Sigma, carbon-oxygen, oxygen activation, inelastic gas

RAS003

Sigma, oxygen activation, inelastic gas

RAS Reservoir Analysis Sonde

Reach out to optimize reservoir performance

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