21results about "Geothermal prediction/simulation" patented technology

A method of improving heat recovery from a geothermal well includes receiving temperature distribution data from a distributed temperature sensing (DTS) system comprising a fiber optic cable disposed in a wellbore, which extends through a formation; analyzing the temperature distribution data to determine a fluid flow profile along the wellbore; determining, based on the fluid flow profile, a location of dominant flow rate; and injecting a sealing agent into the formation at the location. When the sealing agent cures, fractures within a fracture system are sealed in the formation at the location. The cured sealing agent prevents or mitigates fluid flow through the formation at the location.

The invention belongs to the technical field of geothermal resource monitoring, and discloses a system for observing the recharge rate of a geothermal well, which comprises a main control unit and a data acquisition module, a man-machine interaction module and a communication module which are connected with the main control unit. The data acquisition module synchronously acquires flow, temperature and pressure data of the mining well and the recharge well. The main control unit firstly analyzes pressure-flow velocity long-time covariance, temperature-flow velocity medium-time response and flow velocity instantaneous stability to comprehensively calculate a reliability index of flow data; and physical rule verification is executed, and when the monitored value is inconsistent with the trend reflected by the pressure and the temperature, the equipment fault is judged. Calculating a stage recharge rate based on high-reliability data, if the stage recharge rate does not reach the standard, carrying out intelligent diagnosis, and if the data reliability is low or equipment failure exists, giving an alarm to indicate that the measurement is abnormal; if the data are reliable, an alarm is given to indicate suspected illegal mining or blockage of the recharge well. According to the invention, the data credibility and the supervision accuracy are improved, and the intelligent positioning of the abnormal source is realized.

A method of operating a thermal system includes receiving a data center heat with a downhole fluid, the data center heat generated by at least one heat generating electronic component of a data center. The method also includes exchanging heat between a facility and the downhole fluid via a ground-source heat pump (GSHP) to fulfill at least a portion of a thermal load of the facility. The method further includes maintaining a thermal balance of the downhole fluid with a borehole heat exchanger (BHE) implemented in a borefield.

The invention relates to a method of designing an enhanced geothermal system and characterising at least one fracture in an enhanced geothermal system. The enhanced geothermal system comprises at least one well combination of at least one injector well and at least one production well. The method comprises forming at least one stage fracture from at least one well of the well combination according to a fracture treatment design and injecting at least one tracer into the at least one stage fracture. The method comprising circulating fluid from at least a first well to at least a second well of well combination via the at least one stage fracture; wherein the circulated fluid carries at least one circulation tracer and collecting samples of fluid from at least one well and analysing tracer concentrations with respect to sampling time. The method comprises calculating at least one fracture characteristic from the analysis of the tracer concentrations.

A method of designing an enhanced geothermal system and characterising at least one fracture in an enhanced geothermal system. The enhanced geothermal system comprises at least one well combination of

A thermal system includes a borehole heat exchanger, a facility having a peak heating load, a data center including at least one heat generating electronic component, and a ground-source heat pump. The data center, the borehole heat exchanger, and the ground-source heat pump are connected in a dynamic downhole fluid circuit with a flow of a downhole fluid. The dynamic downhole fluid circuit is configured to reject heat from the data center to the facility and to the BHE, and a power capacity of the data center is less than the peak heating load of the facility.

The invention relates to the technical field of geothermal well sand production identification, and discloses an intelligent identification method and system for a geothermal well sand production position. The method comprises the steps that acoustic logging, resistivity and gamma ray data of a geothermal well are collected, and an original data set is formed; multi-dimensional feature extraction is carried out on the Gamma ray abnormal features, and a feature parameter set composed of the interval transit time, the resistivity gradient and the Gamma ray abnormal features is obtained; a dynamic stratum model is constructed based on the set, and the stratum characteristics of different underground depth intervals are represented; comparing the model with a preset standard stratum characteristic library, and identifying a target depth interval with significant difference; in combination with historical sand production records, the stratum parameter change trend is analyzed to determine a potential sand production layer; calculating a stratum stability index to generate a sand production risk grade, and correcting the risk grade in combination with underground real-time monitoring data; and finally, an identification report containing the stratum characteristic description and the sand production risk distribution of the target depth interval is generated, and targeted sand production prevention and treatment suggestions are output.

Methods, systems, and devices for quantifying geothermal heat flux using shallow subsurface temperature measurements are provided. A method can include deploying vertical temperature probes with fiber optic sensors, strain sensors, and advective sensors at measurement sites. Time-series temperature data is then recorded, processed to determine equilibrium temperature profiles, and corrected for climate-driven signals, strain, and advection effects. Geothermal heat flux is calculated by combining the corrected temperature gradient with subsurface thermal conductivity, and a heat flux map can be generated to identify geothermal energy resources.

The invention relates to the technical field of geothermal energy utilization, and discloses a medium-deep geothermal well heat exchange system and method utilizing supercritical carbon dioxide. The density active regulation and control module comprises a micro pressurization injection unit, a thermoelectric refrigeration fine adjustment unit and a micro pressure relief buffer unit; and the intelligent control module is used for controlling the density active regulation and control module so as to regulate the natural circulation flow of the supercritical carbon dioxide in the closed circulation loop. The intelligent control module is arranged to predict the future trend of the natural circulation driving force of the system according to the real-time operation parameters, an instruction can be sent to the density active regulation and control module in advance based on the measurement result, and feedforward intervention is carried out before the system deviates from the optimal working point; therefore, the inherent time lag and overshoot problems in traditional feedback control are effectively inhibited, and the operation stability and the heat extraction efficiency of the whole heat exchange system are improved.

A method of identifying a geothermal reservoir of an earth formation comprises receiving engagement data from an engagement sensor. The engagement data corresponds to an engagement of the instrumented engagement element with a borehole in the earth formation. The method includes identifying environment data from a rotation sensor. The environment data corresponds to a downhole environment of the engagement data. The method includes mapping the engagement data to the environment data to generate mapped engagement data.

A method of improving heat recovery from a geothermal well includes receiving temperature distribution data from a distributed temperature sensing (DTS) system comprising a fiber optic cable disposed in a wellbore, which extends through a formation; analyzing the temperature distribution data to determine a fluid flow profile along the wellbore; determining, based on the fluid flow profile, a location of dominant flow rate; and injecting a sealing agent into the formation at the location. When the sealing agent cures, fractures within a fracture system are sealed in the formation at the location. The cured sealing agent prevents or mitigates fluid flow through the formation at the location.

A method includes causing a first portion of a heat-transfer working fluid to flow from a first lateral wellbore of a closed-loop geothermal well to a second lateral wellbore of the closed-loop geothermal well via a wellbore intersection. The first lateral wellbore and the second lateral wellbore reside in a target subterranean zone. A second portion of the heat-transfer working fluid is caused to flow through the Earth of the target subterranean zone from the first lateral wellbore to the second lateral wellbore.

A method of identifying a geothermal reservoir of a formation includes receiving engagement data from an engagement sensor. The engagement data corresponds to an engagement of the instrumented engagement element with a borehole in the subterranean formation. The method includes identifying environmental data from a rotation sensor. The environmental data corresponds to the downhole environment of the engagement data. The method includes mapping the joint data to the environmental data to generate mapped joint data.

A method of controlling maximum and minimum temperature values from heel to toe in a lateral portion of a geothermal well. The method includes disposing at least one pair of wells near a location where thermal contact is possible. The working fluid circulates in one direction in one well of the pair and the working fluid of the second well circulates in the opposite direction to the first. In this manner, a temperature balance may be obtained to mitigate the maximum and minimum values, resulting in a substantially more uniform temperature of the working fluid in the respective wells and the rock formation region therebetween. Specific operating schemes are disclosed that relate to temperature control for maximizing thermal energy recovery.

Methods for geothermal well planning and development are provided. This includes: installing fiber optic cables that extend within a plurality of shallow wells, wherein the fiber optic cables support both DTS measurements and DAS measurements; connecting DTS interrogators to the fiber optic cables and configuring the DTS interrogators to measure temperature profiles in the plurality of shallow wells over time; determining planned location of one or more geothermal wells that access a geothermal reservoir from the measured temperature profiles; selecting at least one shallow well to be used for DAS measurements; at each selected shallow well, disconnecting the DTS interrogator from the fiber optic cable at the shallow well and connecting a DAS interrogator to the fiber optic cable at the shallow well; and configuring the DAS interrogator at each selected shallow well to measure an acoustic profile in the selected shallow well over time.

Methods, systems, and devices for quantifying geothermal heat flux using shallow subsurface temperature measurements are provided. A method can include deploying vertical temperature probes with fiber optic sensors, strain sensors, and advective sensors at measurement sites. Time-series temperature data is then recorded, processed to determine equilibrium temperature profiles, and corrected for climate-driven signals, strain, and advection effects. Geothermal heat flux is calculated by combining the corrected temperature gradient with subsurface thermal conductivity, and a heat flux map can be generated to identify geothermal energy resources.

Methods, systems, and devices for quantifying geothermal heat flux using shallow subsurface temperature measurements are provided. A method can include deploying vertical temperature probes with fiber optic sensors, strain sensors, and advective sensors at measurement sites. Time-series temperature data is then recorded, processed to determine equilibrium temperature profiles, and corrected for climate-driven signals, strain, and advection effects. Geothermal heat flux is calculated by combining the corrected temperature gradient with subsurface thermal conductivity, and a heat flux map can be generated to identify geothermal energy resources.

Disclosed herein are system, apparatus, article of manufacture, method and / or computer program product embodiments, and / or combinations and sub-combinations thereof, for using a hot sedimentary aquifer (HSA) in geothermal energy generation applications. An example embodiment operates by pumping, via multiple extraction wells, heated water from one or more extraction depths of an HSA. The HSA is identified based on a permeability satisfying a threshold permeability range. The example embodiment further operates by extracting, via a power generation unit, heat from the heated water to generate power and transform the heated water into cooled water. Subsequently, the example embodiment operates by injecting, via multiple injection wells, the cooled water at one or more injection depths of the HSA.

Methods, systems, and devices for quantifying geothermal heat flux using shallow subsurface temperature measurements are provided. A method can include deploying vertical temperature probes with fiber optic sensors, strain sensors, and advective sensors at measurement sites. Time-series temperature data is then recorded, processed to determine equilibrium temperature profiles, and corrected for climate-driven signals, strain, and advection effects. Geothermal heat flux is calculated by combining the corrected temperature gradient with subsurface thermal conductivity, and a heat flux map can be generated to identify geothermal energy resources.

A method of identifying a geothermal reservoir of an earth formation comprises receiving engagement data from an engagement sensor. The engagement data corresponds to an engagement of the instrumented engagement element with a borehole in the earth formation. The method includes identifying environment data from an environment sensor. The environment data corresponds to a downhole environment of the engagement data. The method includes mapping the engagement data to the environment data to generate mapped engagement data.