Resman geothermal tracers

Temperature rating

Up to 330 degC [626 degF]

Applications

• Conventional hydrothermal systems
• Enhanced geothermal systems (EGS)

Benefits

Conventional hydrothermal

• Map reservoir connectivity and sweep efficiency
• Measure residence time of injected fluid (water)
• Provide early warning of cold water breakthrough
• Measure the efficiency of scale treatments

EGS

• Verify perforation and stage fracturing efficiency without NPT risks, added rig time, or complexity
• Acquire a quantitative production log (QPL) without intervention or production disturbance
• Identify fracture-driven interactions and evaluate their impact, uniformity, connectivity, and durability
• Map the complexity of flow paths
• Acquire insights into fluid flow and reservoir contact
• Monitor cleanup performance and stimulation efficiency
• Minimize transport costs and HSE concerns

Features

• 38 unique signatures—the largest number to date in the industry—for higher-resolution monitoring applications in the most complex wells and field development projects
• Inherent tracer stability at elevated temperatures, enhancing confidence in results
• No external power requirements for propulsion, interrogation, or communication
• Designs based on industry-leading experience
• Nonradioactive chemicals

How they improve performance

Resman™ geothermal tracers survive in the harshest environments. For conventional geothermal applications, their stability and dependability give operators the confidence to continuously measure the retention time and fine-tune water injection for maximum efficiency.

In the case of EGS, we also monitor fracture and circulation efficiency, building on our experience from the stimulation arena to optimize project economics.

How they work

Tracer signals are plotted against time, a dissimilar tracer, or both, for advanced analysis. The resulting curves are then interpreted, often together with other relevant data.

Appearance of tracers in a different place compared with where they were introduced provides proof of mass transport and connectivity. The value comes from interpreting the tracer journey, a task that we have simplified with advanced digital workflows that use the direct measurements as input.

For conventional hydrothermal applications, the Resman geothermal tracer is injected together with the return water and sampled at the surface extraction point. In the case of EGS, while stimulation or fracturing is in progress, unique tracers in liquid form are seamlessly blended into stage, stage cluster, or zonal treatments. The stimulation or fracturing process transports the tracer into the formation. During flowback and production, fluid samples are captured at surface at a frequency agreed with the operator and analyzed with a resolution of parts per trillion; proprietary interpretation methods are used to generate a quantitative production log (QPL) of stage, cluster, or zonal performance.

Results are subsequently presented via the Tracer Track™ visualization solution, where applicable.

Additional information

Scalable solutions for analysis

• Centralized lab facility in Norway for ultimate parts-per-trillion (ppt) performance
• Resman Express™ mobile lab services for rapid results at the wellsite with parts-per-billion (ppb) performance, or extraction of tracer from produced fluids for ease of transport