Abstract: The invention provides a system and method for monitoring a subterranean formation. The method comprises injecting injection fluid into the at least one injection well wherein the at least one injection well is in fluid communication with the subterranean formation. The method comprises injecting or releasing at least one tracer into the at least one injection well and taking at least one sample from fluid produced from the subterranean formation. The method comprises measuring a concentration of the at least one tracer in the at least one sample and based on the measured concentration of the at least one tracer monitoring at least one characteristic of the subterranean formation.

Abstract: The invention provides a system and method for monitoring a supercritical geothermal reservoir. The method comprises injecting an injection fluid and at least one tracer into the geothermal reservoir. The method comprises taking at least one sample of supercritical fluid produced from the geothermal reservoir and measuring a concentration of the at least one tracer in the at least one sample. The method comprises monitoring at least one characteristic of the supercritical geothermal reservoir based on measured concentration of the at least one tracer.

Abstract: Methods and systems are provided for monitoring a tracer within a monitored system that includes at least three barrier layers and at least three corresponding tracers. The barrier layers—referred to as a first, second, and third barrier layer—may each have an initial association with a different one of the three tracers. The methods and systems may further enable detection, such as after the monitoring step, of a tracer at a location outside its initial associated barrier layer, where the detected tracer may be one of the three tracers. In certain embodiments, additional barrier layers and/or additional tracers may be employed, and interactions between and/or among them may allow determination of the location, concentration, amount, and identity of one or more traced compositions, including, for example, identification of breaches, within sealable monitored systems.

Abstract: Disclosed are methods and systems for monitoring a tracer in a monitored system having at least three three barrier layers and at least three tracers, wherein for the at least three barrier layers those barrier layers may be called a first barrier layer, a second barrier layer, and a third barrier layer, wherein each of these barrier layers has an initial association with a different one of the three tracers. Further, the disclosed methods and systems may detect, subsequent to the monitoring, the tracer at a location that is external to the initial association for the different one of the three tracers, wherein the tracer is one of the three tracers. In various example embodiments, the methods and systems may include more barrier layers and/or more tracers, whereby interactions therein permit determination of location, concentration, amount, and identity of traced composition(s), including breaches, in sealable monitored systems.

Abstract: The invention may provide a method and system of characterising at least one fracture in an enhanced geothermal system. The method comprises arranging two or more tracer sources with distinct tracer materials in known levels of a production well of the enhanced geothermal system. The method comprises injecting at least one tracer into the at least one fracture in the injection well, producing fluid in the production well, collecting samples of produced fluid and analysing the samples for the presence and/or concentration of tracers. Based on the presence and/or concentration of tracers in the samples estimating at least one characteristic of the at least one fracture.

Abstract: The invention may provide a method and system of characterising at least one fracture in an enhanced geothermal system. The method comprises arranging two or more tracer sources with distinct tracer materials in known levels of a production well of the enhanced geothermal system. The method comprises injecting at least one tracer into the at least one fracture in the injection well, producing fluid in the production well, collecting samples of produced fluid and analysing the samples for the presence and/or concentration of tracers. Based on the presence and/or concentration of tracers in the samples estimating at least one characteristic of the at least one fracture.