43 results about "Geothermal gradient" patented technology

The invention discloses a buried pipe temperature response calculation method considering underground water seepage and ground temperature gradient, and belongs to the field of building environment and energy application engineering.The buried pipe temperature response calculation method comprises the steps that a shallow buried pipe heat exchanger is regarded as a finite long-line heat source model, and when underground water seepage passes, the shallow buried pipe heat exchanger is regarded as a finite long-line heat source seepage model; an energy control equation containing a soil heat conduction item, an underground water seepage convection item and a ground temperature gradient correlation item at the same time is established, and initial temperature distribution based on ground temperature gradient, ground surface fixed wall temperature and boundary conditions of an underground limited boundary are set; and finally, obtaining an analytical solution expression of the change of the temperature at any position of the underground soil along with the time through analytical solution. According to the method, the defect that a traditional model ignores key environmental factors is overcome, the heat transfer process of heat conduction and convection coupling can be accurately simulated, the accuracy of temperature field prediction and the reliability of long-term performance evaluation are remarkably improved, meanwhile, the complexity of numerical calculation is avoided, and the calculation efficiency is improved.

The invention relates to a cluster well group efficient group mining method. The method comprises the steps that a stratum structure, heat reservoir distribution, ground temperature gradient, permeability and porosity of a target area are obtained; generating well group collaborative logic based on geological parameters and underground sensor data, wherein the well group collaborative logic comprises dynamic well spacing calculation, well group Voronoi clustering and grouping, a yield distribution relation and an interference suppression strategy; production optimization parameters are determined according to collaborative logic, temperature, pressure and flow data are collected in real time through a monitoring system, and production is dynamically adjusted in combination with a geological interference model (including a heat-flow coupling equation). Layered well spacing and selective perforation are implemented for multiple heat reservoirs, and parameters of each layer are independently set. Monitoring data interference is filtered through collaborative logic, when a single well fluctuates, the yield and the recharge amount of an adjacent well are automatically adjusted to keep the total capacity stable, a fault diagnosis model is updated based on real-time data, parameters are recursively optimized, and closed-loop control is formed.

The invention provides a method and a device for determining spatio-temporal evolution of clastic rock diagenetic fluid in a fractured basin. The method for determining spatio-temporal evolution of clastic rock diagenetic fluid in the fractured basin comprises the following steps: acquiring authigenic minerals at different structural positions of the fractured basin; wherein the authigenic minerals comprise carbonate, quartz secondary enlargement and anhydrite; determining the paleofluid temperature of the authigenic mineral according to the uniform temperature of the saline inclusion of the authigenic mineral and the uniform temperature of the hydrocarbon inclusion; and determining the spatio-temporal evolution process of the clastic rock diagenetic fluid of the broken basin according to the paleo-fluid temperature, the predetermined burying history of the broken basin and the paleo-ground temperature gradient. According to the method, the activity time range of diagenesis fluid in clastic rock reservoirs at different structural positions is determined, so that fluid difference evolution modes of different structural positions of the broken lake basin are established, and technical support is finally provided for predicting causes of high-quality clastic rock reservoirs.

The invention provides a method for determining the pore diameter lower limit and the effective pore volume ratio of movable fluid. The method comprises the steps that the temperature of each sample under the stratum in-situ condition is calculated according to the ground temperature gradient and the burial depth; correcting the surface tension coefficient of the water by using the calculated temperature; determining an average contact angle of water and shale; calculating capillary force, enabling the capillary force to be equal to reservoir fluid pressure, and calculating the lower limit of the aperture of the movable water; carrying out carbon dioxide adsorption, liquid nitrogen adsorption and mercury injection experiments on the sample to obtain connectivity pore volume-pore size distribution, and calculating effective pore volume in combination with a movable water pore size lower limit; carrying out a low-field nuclear magnetic resonance experiment, calculating the total pore volume of macropores, obtaining the total pore volume of small pores in combination with a carbon dioxide experiment, and finally calculating the total pore volume; and calculating the pore volume ratio of the effective pores by using the pore volume of the effective pores and the total pore volume. According to the method, the evaluation precision of the lower limit of the pore diameter of the shale reservoir movable fluid and the pore volume ratio of the effective pores is effectively improved, and the test cost is reduced.

The invention provides a sandstone reservoir porosity quantitative prediction method under a double-height and double-depth background, and relates to the technical field of oil-gas exploration and development, and the method comprises the steps: obtaining a rock sample of a target stratum of a research region; determining lithofacies types of sedimentary rocks in the research area; obtaining particle size distribution histograms of different lithofacies types through particle size analysis; measuring the pore size and the pore distribution type in the rock sample; determining the diagenesis type of the research area; establishing a statistical relationship between the porosity and the ground temperature gradient through the pore distribution type and the pore size; constructing a pressure field of the research area to obtain a pressure coefficient of the research area; and performing fitting superposition through the porosity, the lithofacies type, the particle size distribution histogram, the statistical relationship, the pressure coefficient and the diagenesis type, and predicting the porosity distribution range of the sandstone reservoir. By comprehensively considering multiple factors such as formation temperature, pressure, burial depth, diagenesis and the like, high-precision prediction of the reservoir porosity is realized.

The present invention relates to the technical field of oil and gas exploration and development, and provides a method and system for calculating formation water resistivity using formation water chloride ion concentration. The method comprises: obtaining a regional downhole formation water sample; determining, based on the formation water sample, a correlation between chloride ion concentration and sodium ion concentration of different water types and the total salinity of the formation water; determining other core ions of each water type; calculating the concentration of each core ion based on the correlation and the principle of ionic charge balance; obtaining an equivalent sodium ion concentration or an equivalent chloride ion concentration from the core ion concentration based on a conversion relationship between the total salinity of the formation water and the equivalent NaCl salinity, and then obtaining the total salinity of the equivalent NaCl solution of different water types based on the correlation; calculating the formation temperature value based on the geothermal gradient and the formation depth, and calculating the formation water resistivity based on the relationship between the equivalent NaCl salinity, the formation temperature value, and the resistivity. The present invention can accurately measure the resistivity of formation water.

The application provides a shale free oil saturation calculation method and device. Through obtaining the surface temperature, geothermal gradient and spectrum of shale, the logging interpretation data is calculated by using a functional relationship; then a training data set and a verification data set are established, the verification data set is sent to a machine learning algorithm model trained by using the training data set, and a data learning result is obtained; based on the data learning result and the spectrum without three-peak characteristics, free oil signal data in the spectrum without three-peak characteristics is determined, the free oil signal data is fitted, and a normal distribution expression of the free oil spectrum is obtained; and the ratio of the free oil porosity component and the effective porosity component is used to calculate the free oil saturation of the target shale, so that the problems of high data acquisition cost and large calculation error in the existing shale free oil saturation calculation method are solved.

The invention belongs to the field of mines, and particularly relates to a mine terrestrial heat gradient utilization system and a multi-source data cooperative control method, the system comprises a terrestrial heat extraction layer, an energy conversion layer, a terminal application layer and a multi-source data cooperative center; the terrestrial heat extraction layer comprises a dynamic telescopic coaxial sleeve and a distributed optical fiber temperature sensor embedded in the well wall; the energy conversion layer is divided into a first level, a second level and a third level; the terminal application layer comprises a wellhead anti-freezing part, a living area, an underground space and an agricultural greenhouse; the multi-source data collaboration center comprises a DDPG reinforcement learning model, a fault self-healing mechanism and an economic verification module. The core innovation point of the invention lies in a geothermal extraction architecture with dynamically adjustable depth (solving geological adaptability) and a DDPG collaborative algorithm driven by multi-source data (breaking data islands).

The application relates to a deep rock mass displacement monitoring method based on segmented temperature compensation and relates to the technical field of geotechnical engineering monitoring.The deep rock mass displacement meter (single-point or multi-point displacement meter) is arranged in a borehole, a hollow measuring rod is adopted, and a temperature sensor is arranged in the hollow measuring rod to realize real-time collection of multiple points of temperature along the length direction of the measuring rod; the measuring rod is divided into multiple monitoring sections, the temperature deformation of each section of the measuring rod is calculated according to the measured temperature of the corresponding depth of each section of the measuring rod, the displacement measurement value of each measuring point is compensated by the segmented temperature deformation, the true displacement of the bedrock is obtained after the temperature influence is eliminated, and thus the quantitative description of the bedrock creep process is realized.The application overcomes the system error caused by the uneven distribution of the ground temperature gradient, significantly improves the deep displacement monitoring precision, is compatible with the existing deep rock mass displacement meter structure, is easy to implement, and is suitable for the bedrock creep mechanism research and long-term safety monitoring of major projects.

The invention discloses a method, device and equipment for quantitatively characterizing a formation heat convection effect and a storage medium, and the method comprises the following steps: determining a layered interface of an upper formation and a lower formation according to an obtained ground temperature gradient; determining the actually measured surface heat flow of the upper stratum according to the average ground temperature gradient of the upper stratum and the harmonic heat conductivity of the upper stratum; pure heat conduction surface heat flow is determined according to the average ground temperature gradient of the lower stratum, the blending heat conductivity of the lower stratum and radioactive element heat production of the upper stratum; and determining a heat convection value of the stratum according to the actually measured surface heat flow of the upper stratum and the pure heat conduction surface heat flow. The method aims at solving the problems that in an existing method, complexity of a stratum structure is not considered, and accurate quantitative analysis is lacked, the stratum heat convection effect is quantitatively represented through steady-state temperature data and accurate stratum in-situ thermophysical properties, and the more accurate and comprehensive quantitative analysis effect is achieved.

The invention discloses a recharge well optimization design and intelligent monitoring system in geothermal resource development, and relates to the technical field of geothermal resource exploitation. Environmental parameters in a recharge well are collected in real time through installed monitoring equipment, and meanwhile a three-dimensional model is constructed based on the collected environmental parameters; after acquisition is completed, thermodynamic analysis is conducted on the recharge well of the corresponding three-dimensional model in a data analysis mode, the ground temperature gradient in the engineering area and a heat conduction model of the recharge well after analysis are determined, and after analysis is completed, a relation model between the temperature and the pressure in the current recharge well is determined through a control variable method; meanwhile, a recharge well optimization decision model is constructed based on a relation model between the temperature and the pressure in the current recharge well; and finally, on the basis of the constructed recharge well optimization decision model, the relation model between the temperature and the pressure in the current recharge well and the environment data acquired in real time, optimizing and monitoring the recharge well in geothermal resource development in a dynamic data simulation mode, so that the accuracy of intelligent monitoring of the recharge well is improved.

This disclosure relates to a method, apparatus, device, storage medium, and product for predicting porosity, applied in the field of seismic exploration technology. In this disclosure, well logging data from a target well is acquired; based on the measured temperature and geothermal gradient data in the well logging data, a temperature set of the target formation is determined. The porosity of the target formation is determined based on the temperature set of the target formation and a first mapping relationship, whereby the first mapping relationship is a mapping relationship between elastic parameters and porosity at different temperatures of the target formation. The reservoir temperature at different depths of the target formation will vary, thus affecting the prediction results of elastic parameters and porosity. By considering temperature change as an indicator when establishing the relationship between elastic parameters and porosity, more geological factors are taken into account when predicting porosity results, making it adaptable to more complex geological conditions. Therefore, the accuracy of porosity prediction can be improved.

The invention discloses a hydrogen source rock in-situ identification method and device which can be used in the field of oil-gas exploration and new energy development, and the method comprises the steps: obtaining multi-dimensional drilling data collected in situ in hydrogen source rock drilling, and obtaining a multi-dimensional real-time data flow; separating independent signals of different alteration processes from the multi-dimensional real-time data stream by adopting an independent component analysis algorithm to obtain a plurality of independent alteration components; an entropy weight method is adopted to calculate the weight of each independent alteration component, according to the obtained ground temperature gradient, each independent alteration component and the weight of each independent alteration component, a continuous hydrogen generation index of each stratum of the hydrogen source rock is determined, and the hydrogen generation index is used for quantifying the hydrogen generation capacity of the hydrogen source rock; and mapping continuous hydrogen generation indexes of all stratums of the hydrogen source rock in the three-dimensional geological network model around the well of the hydrogen source rock drilling. According to the method, cross interference in hydrogen source rock identification can be eliminated, and the hydrogen source rock exploration efficiency and accuracy are improved.

The invention discloses a clastic rock reservoir corrosion porosity prediction method, device and equipment, and the method comprises the steps: carrying out the calibration through employing single well data based on the seismic section geological interpretation data of a target region, and determining the stratigraphic data of each section point of the target region; based on the regional geological data of the target region, acquiring the earth heat flow value and the earth temperature gradient of the target region to determine the formation temperature of each section point formation layer in each geological period; based on the organic acid concentration and the stratum temperature in the stratum layering organic matter hydrocarbon evolution process of each section point of the target area, the PH value of underground fluid of the stratum in each geological period is determined; correcting a time temperature-fluid pH value index of the stratum based on the time temperature index of the stratum and the pH value of the underground fluid; and based on the corrosion amount of the stratum and the time temperature-fluid acidity and alkalinity index of the stratum, fitting an incidence relation between the corrosion amount and the time temperature-fluid acidity and alkalinity index to predict the corrosion porosity of the target layer, and realizing quantitative prediction of the corrosion porosity.

The invention relates to the technical field of terrestrial heat control, and discloses a deep terrestrial heat cascade development system and control method based on multi-source heat storage cooperative scheduling, and the system comprises a multi-source heat storage perception and fusion subsystem, a dynamic heat flow scheduling subsystem and a cascade heat energy release subsystem. The method comprises the following steps: merging multi-source original heat storage distribution data into a heat storage state diagram containing real-time temperature, pressure and permeability parameters of heat storage; converting the heat storage state diagram into a real-time heat flow scheduling plan, wherein the heat flow scheduling plan specifies the rate, sequence and path of extracting heat energy from each heat storage; according to a real-time heat flow scheduling plan, heat energy is released step by step from high temperature to low temperature through a multi-stage heat exchange sequence, and heat energy of different grades is generated and output for power generation or heating. Accurate three-dimensional modeling of underground heat storage parameters is achieved, and the technical bottlenecks of low energy utilization efficiency, high stratum disturbance risk and fast productivity attenuation in traditional geothermal development are broken through.

The invention provides a method and a device for recovering the denudation thickness and the thermal historical evolution process of a superimposed basin. The method for recovering the denudation thickness and the thermal historical evolution process of the superimposed basin comprises the following steps: selecting a rock sample of a target work area; wherein the rock sample is at least one of a sandstone sample, a volcanic rock sample and a metamorphic rock sample containing apatite and zircon mineral particles; performing in-situ microcell isotope dating measurement on the rock sample to generate a dating measurement result; and determining the denudation thickness according to the ground temperature gradient of the target work area and the dating measurement result, and recovering the thermal historical evolution process. According to the method, quantitative recovery of the stratum denudation thickness caused by multi-stage tectonic cycle superposition and inversion of the dynamic evolution process of the thermal history under multi-stage tectonic activity superposition can be achieved, the defects in the prior art are effectively overcome, and the method has great significance in research and exploration evaluation of oil and gas accumulation in the complex superimposed basin.

The invention discloses a salt water layer CO2 storage pressure control method based on molecular simulation and a density-depth chart construction method. The method comprises the following steps: S1, collecting ground temperature gradient and pressure gradient data of a typical well in the abdominal area of the Zongorge basin; s2, constructing a coupling model of depth, temperature and pressure according to the temperature and pressure data; s3, constructing a multi-component formation water molecule model and carrying out geometric optimization; s4, performing molecular dynamics simulation under a selected temperature and pressure condition, and extracting equilibrium density data; s5, based on a simulation result, fitting a salt water layer formation water density-depth empirical formula; s6, calculating the CO2 density based on a Span-Wagner state equation, constructing a CO2 molecular model, and carrying out geometric optimization; and S7, establishing a layered structure of CO2 and salt water layer formation water, and performing pressure control molecular dynamics simulation. According to the method, a new idea and a visual chart are provided for CO2 geological sequestration and microscopic behavior research of other gases.

The invention provides an in-situ measurement method and device for stratum thermophysical parameters, a terminal and a storage medium, and belongs to the technical field of full-well-section stratum thermal parameter measurement, and the measurement method comprises the following steps: starting a drilling machine lifting device, lowering a side wall coring instrument to a to-be-measured stratum depth, and drilling a to-be-measured rock core by using the side wall coring instrument; starting the thermal parameter measuring device, heating the resistance wire at constant power, and measuring the resistance change value of the resistance wire caused by the temperature change of the to-be-measured core; according to the basic physical parameters of the resistance wire, the relation between the temperature change and the resistance change and the mathematical relation between the thermophysical parameters, the thermophysical parameters of the rock core of each test point and the stratum temperature gradient of the whole well section are calculated. The in-situ measurement method and device for the stratum thermophysical parameters, the terminal and the storage medium have the technical effects that the stratum thermophysical parameters can be measured, the stratum temperature gradient of the whole well section can be calculated, the ground temperature gradient can be rapidly obtained, and the geothermal resource quantity can be accurately evaluated.

The invention discloses a method, a system and equipment for evaluating the installation depth of a multi-stage throttle valve and a medium, relates to evaluation of the installation depth of a throttle valve in oil and gas exploitation, and aims to solve the technical problem that the installation depth of the multi-stage throttle valve cannot be evaluated in the process of installing the throttle valve. Comprising the following steps: acquiring initial data of an oil well, constructing a shaft infinitesimal section, setting a ground temperature gradient, setting pressure change, calculating outlet pressure, calculating pressure deviation, judging that a wellhead is reached, comparing errors, updating the pressure change, updating pressure before throttling, calculating outlet temperature, adjusting mounting parameters of a throttling valve, calculating data after throttling, and replacing the pressure and the temperature. Judging other throttle valves, and outputting results and corresponding logics and algorithms. According to the depth of the shaft and the corresponding pressure and temperature, the temperature and pressure change conditions of the whole well section can be obtained, and the downstream cooling effect of each stage of throttling valve under the corresponding depth can be evaluated by setting the nozzle diameter and the installation depth for each stage of the multi-stage throttling valve.

The invention relates to the technical field of geothermal development, and discloses a U-shaped well heat and mass transfer numerical simulation method. Comprising the following steps: collecting parameters such as formation lithology, porosity and permeability to construct a three-dimensional heterogeneous formation model; establishing an in-well fluid Navier-Stokes equation, a stratum heat conduction equation, a dissolved mass diffusion equation and a coupling model of a heat / mass exchange boundary; starting a discrete heat boundary according to lithologic interface heat conductivity coefficient jump greater than or equal to 50%, and starting a heat flux maintaining boundary according to well inlet temperature change rate greater than or equal to 5 DEG C / h; unstructured grids are adopted, and well periphery grids are compacted to be smaller than or equal to 1 m; initializing a temperature field and well inlet parameters according to the geothermal gradient; iteratively solving by combining a finite volume method with a k-epsilon turbulence model (convergence precision is less than or equal to 10 <-6 >); and comparing actual measurement data optimization parameters, and adjusting the stratum heat conductivity coefficient or the grid density when the deviation is greater than 5%. According to the method, a heterogeneous stratum heat transfer mechanism is accurately described, and the reliability of geothermal engineering design is improved.

The present application relates to the technical field of in-situ acquisition of seabed, in particular to a new gravity sampling and geothermal gradient measuring device and measuring method. The measuring device comprises: an impact unit, including an outer cylinder and a transmission cylinder, the transmission cylinder is located on the annular inner side of the outer cylinder, and the transmission cylinder rotates along the annular inner surface of the outer cylinder, an impact mechanism is arranged in the outer cylinder, and the transmission cylinder drives the impact mechanism to generate a downward impact force on the probe rod unit during rotation; a probe rod unit, fixedly connected with the bottom of the impact unit, comprising a probe rod and a plurality of temperature sensing units arranged on the probe rod. It can realize large-depth penetration of the probe, and complete in-situ temperature acquisition and in-situ sample collection during continuous downward penetration.

The present application relates to a kind of rift basin present geothermal field prediction method.The method first obtains the mean of well point stable section geothermal gradient in study area, and according to stratigraphic compaction coefficient and other parameters, the study area is divided into multiple sub-regions;Subsequently, the preliminary prediction model between geothermal gradient and Moho depth, basement depth, stratigraphic thermal conductivity weighted average value is established in each sub-region;By identifying the residual of preliminary prediction model, the geothermal gradient high well site is systematically screened out, and then the quantitative analysis of the enhancement effect of deep fault on geothermal field is carried out: that is, based on three-dimensional seismic data, the temperature control influence range of each fault is determined, the distance of well site from fault is calculated, and the enhancement efficiency coefficient of fault is obtained by linear regression, and the preliminary model is corrected, to obtain the final prediction model;Finally, based on regional base map and the final model, high-precision geothermal gradient distribution map is generated by gridding calculation.

The present application relates to the technical field of three-dimensional observation, and particularly relates to a geological deformation three-dimensional observation system and method, which comprises multi-dimensional data acquisition: synchronously acquiring data, and collecting ground temperature gradient field data and underground water flow velocity field data of a monitoring area; data space-time calibration processing: uniformly processing the collected data according to time and space bases to generate a multi-source displacement data set after space-time calibration; cold variable extraction: generating an environment coupling variable matrix based on the ground temperature gradient field data and the underground water flow velocity field data in the multi-dimensional data acquisition; three-dimensional deformation field modeling: generating an initial three-dimensional deformation field model; model dynamic correction: iteratively correcting the initial three-dimensional deformation field model to generate an optimized three-dimensional deformation field model; visualized early warning output: generating an early warning signal with a risk level identifier. The present application realizes high-precision three-dimensional deformation field modeling and early warning by constructing a multi-source heterogeneous data fusion system and combining a cold geological variable dynamic compensation mechanism.

The invention discloses a stratum denudation thickness calculation method, which comprises the following steps: acquiring different-depth ground temperature data of a target stratum through a thermal advection coupling ground temperature field inversion model, extracting paleo-temperature data of a fluid inclusion in a rock core sample by using a fluid inclusion paleo-temperature scale denudation model, and determining paleo-ground temperature gradient change characteristics; processing mudstone porosity data by adopting a mudstone compaction curve dynamic fitting algorithm, establishing a dynamic relationship between the porosity and the buried depth, and optimizing a compaction curve; the data are input into a three-dimensional stratum denudation modeling analysis platform, a target stratum three-dimensional space structure model is constructed, modeling parameters are adjusted in combination with ground temperature gradient change and ancient ground temperature evolution characteristics, and the stratum denudation process is simulated; and finally, according to a simulation result and mudstone compaction degree parameters, calculating denudation thicknesses of different positions of the target stratum. According to the method, through cooperative application of multiple models and an algorithm, the accuracy of stratum denudation thickness calculation is improved.

The invention discloses a continental facies mud shale gas geological evolution simulation analysis method, and relates to the technical field of oil-gas exploration, the method comprises the following steps: drilling a test shale core sample and sandstone sample combination to obtain a simulation geological sample; according to the stratum burying mode, the ground temperature gradient and the pressure, performing a hot-pressing simulation experiment on the simulation geological sample to obtain a simulation experiment product; calculating HI and TOC parameter values of the simulation experiment product, and obtaining a geological maturity Ro value corresponding to each experiment temperature point; according to the Ro value, obtaining an oil discharge efficiency curve of the simulated geological sample at different geological maturity; and performing reservoir space evolution simulation and shale pore quantitative analysis on the simulation experiment product to obtain a shale reservoir sample analysis result. Through combination of a hot-pressing simulation experiment and liquid hydrocarbon / gaseous hydrocarbon separation analysis, the oil discharge efficiency and the pore evolution characteristics are synchronously quantified, and the problems that the hydrocarbon discharge efficiency error is large and the pore structure is difficult to accurately evaluate in a traditional method are solved.

This invention discloses a calculation method for the temperature response of buried pipes considering groundwater seepage and geothermal gradients, belonging to the field of building environment and energy application engineering. The method includes: treating the shallow buried pipe heat exchanger as a finite-length heat source model, and treating it as a finite-length heat source seepage model when groundwater seeps through it; establishing an energy control equation that simultaneously includes soil thermal conductivity, groundwater seepage convection, and geothermal gradient correlation terms; setting boundary conditions based on the initial temperature distribution of the geothermal gradient, the constant surface wall temperature, and the finite underground boundary; and finally obtaining an analytical solution expression for the temperature change of any location in the underground soil over time through analytical solving. This invention overcomes the shortcomings of traditional models that ignore key environmental factors, accurately simulates the coupled heat transfer process of conduction and convection, significantly improves the accuracy of temperature field prediction and the reliability of long-term performance evaluation, while avoiding the complexity of numerical calculations and improving computational efficiency.

The present application belongs to the technical field of frozen ground foundation engineering, and in particular to a frozen ground foundation bearing behavior prediction method with multi-pile length cooperation. A three-dimensional geological-temperature database of the frozen ground foundation is constructed, stratum distribution, water content, fine particle content and geothermal gradient data are integrated, frozen layers and unfrozen layers are divided, and high, medium and low frost heaving sensitive zones are identified. Based on the sensitive zone distribution, a three-level differentiated pile type of "short pile-medium pile-long pile" is designed, a coupling relationship between pile length and frost heaving sensitivity is established, a group pile soil resistance correction model considering pile length difference is constructed by introducing a multi-pile length cooperation effect coefficient, and a frozen layer rigid shell effect correction model and an unfrozen layer bearing decay model are integrated. Through the differentiated pile type design and the cooperation effect model, the problem that the traditional method cannot handle the spatial variability of frozen soil, resulting in inaccurate bearing behavior prediction, is solved, and the present application has the advantages of accurate prediction, optimized design, improved safety and economy.

The invention relates to the technical field of medium-deep layer geothermal resource development, and discloses a medium-deep layer geothermal gradient coupling efficient heat exchanger which comprises a heat exchanger body, a mounting ring is fixedly mounted on the outer side of the heat exchanger body, and a movable ring attached to the bottom of the mounting ring is movably mounted on the outer side of the heat exchanger body. A limiting frame is fixedly mounted on the outer side of the mounting ring, a fixing mechanism penetrating through the limiting frame is arranged on the inner side of the movable ring, a limiting mechanism which extends to the outer side of the mounting ring and is attached to the fixing mechanism is arranged on the inner side of the mounting ring, and a stabilizing mechanism attached to the heat exchanger body is arranged on the outer side of the movable ring. According to the medium-deep layer geothermal gradient coupling efficient heat exchanger, by arranging the movable ring, the limiting frame, the fixing mechanism and the limiting mechanism, the purpose that a stable structure is convenient to install is achieved, and by arranging the stable structure and the gear mechanism, the purpose that the stability of the heat exchanger is guaranteed is achieved.

The application provides a formation thermal parameter in-situ measurement method, device, terminal and storage medium, belongs to the technical field of full well section formation thermal parameter measurement, and the measurement method comprises the following steps: starting a drilling rig lifting device, lowering a sidewall coring instrument to a formation depth to be measured, and drilling a core to be measured by using the sidewall coring instrument; starting a thermal parameter measurement device, heating a resistance wire at a constant power, and measuring a resistance change value of the resistance wire caused by temperature change of the core to be measured; according to a basic physical parameter of the resistance wire, a relationship between temperature change and resistance change, and a mathematical relationship between thermal parameters, core thermal parameters of each test point are calculated, and a formation temperature gradient of a full well section is calculated. The application provides the formation thermal parameter in-situ measurement method, device, terminal and storage medium, which has the technical effects that formation thermal parameters can be measured, a formation temperature gradient of a full well section can be calculated, a formation temperature gradient can be quickly obtained, and a geothermal resource amount can be accurately evaluated.

The invention relates to the technical field of ground source heat pumps, in particular to a ground source heat pump system heat energy conversion efficiency prediction method which comprises the steps that the outlet temperature, the inlet temperature, the ground temperature gradient and energy consumption information of a ground source heat pump during operation are recorded; taking the ground temperature gradient in the current scene as a reference, performing coupling processing on the inlet temperature and the outlet temperature, and determining an environment parameter set under scene coupling; performing correlation explanation on the environmental parameter set by using energy consumption information, and constructing a heat supply load change curve in combination with actual operation time distribution of the ground source heat pump; based on the heat supply load change curve at any moment, predicting the energy efficiency ratio of the heat supply load, and determining a predicted value of the energy efficiency ratio; and mixing the predicted value of the energy efficiency ratio with actual data, calculating a predicted residual error of the energy efficiency ratio, determining a maximum prediction proportion of the energy efficiency ratio according to an anchoring scene of the energy efficiency ratio, carrying out data binding on the maximum prediction proportion, and outputting the data. The accuracy and the processing efficiency of thermal conversion prediction are realized.