RASP™ Reservoir Analysis Sonde Prospector 

Critical data for insight into the reservoir, the formation and the wellbore

The Renegade Reservoir Analysis Sonde Prospector (RASP™) pulse neutron tool helps characterize the formation and provide information the operator needs to make timely decisions on well performance and well planning.  

• Three detectors (near, far, and long spacing) 
• 1-11/16-in. OD 
• Rugged, corrosion-resistant housing 
• Industry leading performance 
• Increased operational efficiency 
• Greater ROI 

RASP is a multi-detector pulsed-neutron system for measuring reservoir saturation using Sigma and Carbon-Oxygen  techniques. The sonde features three gamma detectors; the near and the far detectors are high-resolution Lanthanum Chloride for Sigma and C/O, while the long spacing detector is a Sodium Iodide detector with spacing that is sensitive to gas and porosity.  

The tool can simultaneously measure Sigma and C/O using a mixed firing pattern for the neutron generator. Support is available to map the measurement into reservoir properties such as oil saturation, porosity and rock type.  

The tool is encased in a 1-11/16 in. OD corrosion resistant housing. The neutron generator provides the best performance in the industry, contributing toward increased operational efficiencies and ROI. 

Applications

 Reservoir Monitoring 

• Time Lapse monitoring  
• CO2 and waterflood zones  
• Steam flood monitoring (heavy oil/tar sands)  
• Production and injection changes  
• Completion quality  
• Gravel pack quality determination  

Formation Evaluation 

• Reservoir rock and hydrocarbon typing  
• Water and hydrocarbon contacts/volume  
• Salt plugged porosity identification  
• Open Hole Logging Emulation  
• Lithology identification using open-hole emulation, silica activation spectroscopy  
• Formation porosity 
• Pseudo Density 

Wellbore Performance and Integrity  

• Water flow detection behind casing  
• Identifying points of fluid entry  
• Flow rate calculation for water flow  
• Interface logging