Whitepapers & Tech Notes
Technical Note: Temperature and Pressure Ratings of Javelin® and Dart™ Logging Tools
This Tech Note details the newly developed an electronics-based solution to improve the temperature rating of all Javelin and Dart downhole NMR logging tools, enabling reliable operation at borehole temperatures up to 85°C.
It also describes the testing of Javelin probes that confirmed pressure ratings from 830 to 2,350 PSI, allowing for deployment in producing wells up to 1,600 meters (5,200 feet).
Maximum temperature and pressure ratings for Javelin and Dart tools have been established through rigorous, instrumented physical testing, and our published temperature and pressure ratings are based on conservative interpretations of all available data. This rigorous and conservative approach ensures reliable and stable system operation and performance throughout the expected operating environments.
Technical Note: New high-resolution NMR logging tools
This Tech Note details the new family of high-resolution NMR logging tools in the Javelin® Slim and Dart™ lines of NMR probes.
High-resolution NMR technology enables to collect NMR data with vertical resolution as small as 1.5 inches (4 cm), providing extremely detailed characterization of the most critical hydrogeological properties: total and mobile porosity, classification of sediment types, and estimates of hydraulic conductivity.
Vista Clara’s high-resolution NMR technology is made possible by a new JMax™ magnet/coil array. The JMax™ design produces multiple spatially-compact cylindrical NMR sensitive zones, resulting in higher vertical resolution compared to existing Javelin and Dart tools which use ‘Numax™’-style magnet and coil arrays.
Major Product Updates for Javelin® and Dart™ NMR Logging Tools Using Numax™ Technology
Vista Clara is pleased to announce a major revision to the Javelin® and Dart™ NMR logging tools. Introducing Numax™, a collection of NMR sensor electronics innovations that enable increased NMR signal amplitudes, reduced susceptibility to noise sources, and faster logging speed for the same resolution compared to previously available NMR logging tools.
Vista Clara is incorporating Numax™ sensor technology into all of our newly manufactured Javelin® and Dart™ logging tools, and we are offering upgrades to existing Javelin® and Dart™ customers to take advantage of these major improvements with minimal added costs.
Numax™ Magnet/Coil Array
Vista Clara has recently developed a new magnet/coil array design called Numax™. The Numax™ design produces cylindrical high-gradient NMR sensitive zones, similar to the original Javelin and Dart tools, but with significant improvement in the baseline (shield room) signal to noise ratio. The Numax™ design also utilizes samarium cobalt magnets for increased maximum temperature ratings and reduced temperature sensitivity across all temperatures.
Technical Note: Multi-frequency NMR Logging
This Technical Note provides a detailed discussion of the benefits of multi-frequency NMR logging. Nearly all modern NMR logging tools have the ability to perform NMR measurements at multiple frequencies during a single logging run. This multi-frequency measurement capability provides many critical operational benefits, including improving the signal-to-noise ratio of the measurements and enabling faster logging (Coates et al., 1999).
Vista Clara’s full line of Javelin® and Dart™ magnetic resonance (NMR) logging probes offer this capability, operating at multiple frequencies to offer unique benefits.
Surface Magnetic Resonance Whitepaper
Superior Technology for Surface Magnetic Resonance Measurements of Hydrogeologic Properties
Read this new whitepaper from Vista Clara to gain a deep understanding of the key considerations in selecting and deploying a Surface Magnetic Resonance system.
We welcome the opportunity to help you incorporate magnetic resonance into your projects.