The present disclosure provides a comprehensive utilization method and test equipment for surface water, a goaf and geothermal energy in a coal mining subsidence area. The method comprises the following steps: determining a geothermal water collection area, arranging heat energy exchange equipment in a main roadway, and arranging a geothermal water extraction system, wherein the geothermal water extraction system comprises geothermal wells, extraction pipelines and tail water reinjection pipelines, the extraction pipelines are connected with the heat energy exchange equipment, and the tail water reinjection pipelines are connected with a water outlet of the heat energy exchange equipment; arranging a water channel on the surface, and arranging a drainage system on a subsidence trough to guide surface water to flow underground; and controlling directional and ordered flow of surface water through the coal mining subsidence area formed by ground mining to achieve sustainable mining of underground water.

Systems and methods for improved geoheat harvesting enhancements are presented in which a wellbore contains a closed loop geoheat harvesting system that is thermally coupled to a hot and dry rock formation via thermal reach enhancement structures that extend from the wellbore into the formation and that are filled with a thermally conductive filler. Preferred configurations and/or operational parameters are determined by a model that calculates heat flow in a three-dimensional system considering time changes and the influence of the thermal reach enhanced intrinsic thermal conductivity of the rock.

The invention relates to a method for sizing a geothermal well for the thermal regulation of a building, including the steps of: 51: Modelling a geothermal potential of a zone of interest including a subsoil zone comprised within a given perimeter around the building; S2: Estimating the thermal requirements of the building; S3: Generating models of geothermal installations according to the results of 51 and S2, a model of a geothermal installation including one or more geothermal solutions configured to meet the requirements estimated in step S2 according to the zone of interest modelled in step 51; S4: Applying a selection criterion which is configured to determine a preferred model.

A geothermal power plant related maintenance support system comprises: a thermodynamic calculation module for determining performance of specified geothermal power plant components; a plurality of. embedded sensors, each of which is embedded in a different geothermal power plant location and adapted to sense a corresponding real-time geothermal power plant parameter; a plurality of environmental sensors adapted to sense ambient conditions in the vicinity of the geothermal power plant; and a processor in data communication with each of said embedded sensors and environmental sensors.

The disclosure provides an Enhanced Geothermal System (EGS) magnetic nanoparticle tracer agent technique and interpretation method. The method comprises the steps of: through a magnetic nanoparticle surface modification technique and thermal stability analysis of a high-temperature high-pressure reactor, firstly accomplishing the screening of magnetic nanoparticles, so as to prepare magnetic nanoparticles having suitable diffusivity and controllable thermal stability; upon this basis, performing a core penetration test, characterizing EGS connectivity by sampling and analyzing the change in concentration of magnetic nanoparticles, and calculating a heat exchange area between rock and injected water; and meanwhile obtaining electromagnetic signal distribution of magnetic nanoparticles entering a reservoir by utilizing an electrical measurement technology, inverting reservoir connectivity by using resistivity and calculating the heat exchange area, and calibrating the resulting reservoir connectivity and heat exchange area with the connectivity.

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 thin-bed hot sedimentary aquifer (HSA) in geothermal energy generation applications. An example embodiment operates by pumping, via an extraction well, heated water from an extraction depth of an HSA. The HSA is identified based on a permeability satisfying a threshold permeability range and could even have a thickness equal to or less than about 100 meters. 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 an injection well, the cooled water at an injection depth of the HSA. A first portion of the extraction well and a second portion of the injection well are disposed within the HSA.

A method for recompleting a well is applied to a well such that the recompleted well can thermally transfer geothermal energy to surface. The recompleting method can comprise steps to hydraulically isolate a wellbore using a hydraulic isolation means, and enhance the thermal conductivity of a reservoir in which the wellbore is located by inserting a thermal material into the reservoir that displaces a reservoir fluid having a lower thermal conductivity than the thermal material.

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.

Disclosed herein is a method for analyzing 2-dimensional geothermal resource data using a web-based 3-dimensional sectional view, to implement an analyzing module performing 3-dimensional section analysis for 2-dimensional geothermal resource spatial data as a program run by data processing devices including a computer. The method for analyzing 2-dimensional geothermal resource data using a web-based 3-dimensional sectional view is configured by the processes of: selecting an analysis target region and generating linear vector data; requesting a section analysis layer of GeoServer for the target region; generating a dynamic query for a section analysis according to the delivered conditions, and executing PostGIS, an open source GIS software; delivering a result of the sectional view analysis executed by PostGIS to OpenLayers, and generating a section analysis results chart to display it on the Web; and displaying the sectional view analysis chart as a pop-up window.

A system for producing geothermal energy may include a tiered geothermal loop energy production system. The tiered geothermal loop energy production system includes: a first closed-loop pipe system emplaced within a heat-producing geologic formation, the first closed-loop pipe system having a first energy production; and a second closed-loop pipe system emplaced within a heat producing geologic formation, the second closed-loop pipe system having a second energy production greater than the first energy production; and, optionally a third closed-loop pipe system emplaced within a heat producing geologic formation, the third closed-loop pipe system having a third energy production. An energy conversion system is configured to convert energy from the tiered geothermal loop energy production system to another form of energy.