CN110886604B - Efficient geothermal resource investigation method based on computer simulation technology - Google Patents
Efficient geothermal resource investigation method based on computer simulation technology Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
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- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/005—Testing the nature of borehole walls or the formation by using drilling mud or cutting data
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- E—FIXED CONSTRUCTIONS
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- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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Abstract
The invention relates to the technical field of geothermal resources and discloses a high-efficiency geothermal resource investigation method based on a computer simulation technology, which comprises the following steps of geology measurement, selecting an area, combining the former petroleum investigation data and geological investigation data of the area, finding out stratum age, lithology characteristics, geological structure and magma activity of a geothermal field, wherein the regional map of a geological measurement map scale is 1/10 ten thousand-1/2.5 ten thousand, and geothermal Tian Tujian is 1/5 ten thousand-1/2.5 ten thousand. According to the efficient geothermal resource investigation method based on the computer simulation technology, through experimental analysis, the system adopts samples such as water, gas, rock soil and the like to analyze and identify, so that relevant parameters of thermal storage are obtained, geological profile information and existing geothermal information are obtained after computer data simulation, and a large amount of manual analysis time can be saved, the efficiency is improved, and the labor is saved by calculating geothermal resource distribution through a computer summary template formula.
Description
Technical Field
The invention relates to the technical field of geothermal resources, in particular to a high-efficiency geothermal resource investigation method based on a computer simulation technology.
Background
Geothermal resources refer to renewable heat energy stored in the earth, are generally concentrated and distributed at the edges of a construction plate, originate from decay of molten magma and radioactive substances of the earth, are valuable comprehensive mineral resources, have multiple functions and wide application, are clean energy resources, can be used for power generation, heating and the like, are also thermal brine resources and natural fat water resources for extracting industrial raw materials such as bromine, iodine, borax, potassium salt, ammonium salt and the like, and are valuable medical hot mineral water, drinking mineral water resources and domestic water supply sources.
In the traditional geothermal resource investigation, various collected data are subjected to manual calculation and analysis, time and labor are wasted, a set of formula templates can be completely obtained for computer analysis through parameters of geothermal resource investigation, a large amount of manual analysis time is saved, and node data are sleeved into the templates to obtain a final analysis result, so that the efficient geothermal resource investigation method based on the computer simulation technology is provided.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a high-efficiency geothermal resource investigation method based on a computer simulation technology, which has the advantages of time saving, labor saving and the like, and solves the problems that various collected data are dependent on manpower calculation and analysis in the traditional geothermal resource investigation, and time and labor are wasted.
(II) technical scheme
In order to achieve the purposes of time and labor saving, the invention provides the following technical scheme: a high-efficiency geothermal resource investigation method based on a computer simulation technology comprises the following steps:
1) Geological measurement, namely selecting an area, combining the previous petroleum investigation data and geological investigation data of the area, and finding out stratum age, lithology characteristics, geological structure and magma activity of a geothermal field, wherein the regional map of the geological measurement map scale is 1/10 ten thousand-1/2.5 ten thousand, and the geothermal Tian Tujian is 1/5 ten thousand-1/2.5 ten thousand;
2) Geochemical investigation is carried out in each geothermal resource investigation stage, representative geothermal fluid, normal-temperature groundwater, surface water, atmospheric precipitation and other samples are adopted for assay analysis, the relation between the representative geothermal fluid, the ground water and the atmospheric precipitation is compared and analyzed, temperature scale calculation is carried out, deep thermal storage temperature is deduced, stable isotopes and radioactive isotopes are measured, the cause and age of the geothermal fluid are deduced, and the geochemical investigation scale is consistent with the geological measurement scale;
3) Geophysical investigation is carried out in the general investigation stage, the geothermal anomaly range and the spatial distribution of thermal reservoirs are defined, and the spatial distribution of substrate fluctuation and hidden fracture of a geothermal field is determined; for example, the north part of the Songliao basin is mainly layered thermal storage, the exploration generally utilizes an artificial earthquake method to accurately measure the fracture position, the occurrence and the thermal storage structure, utilizes a magnetotelluric current method to determine the thermal storage position and the occurrence of the geothermal Tian De, and the geophysical survey scale is consistent with the ground mapping scale;
4) Drilling, designing and constructing a exploratory well, and various tests in the exploratory well, wherein the exploratory well is required to meet geothermal geological conditions, obtain representative calculation parameters and evaluate geothermal resources, mainly find out pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keep the exploratory well vertical, ensure that the well inclination is not more than 10 in a depth of 100m, ensure that the caliber of the exploratory well meets the requirements of sampling logging and installing pumping test equipment after completion, ensure that the exploratory well also meets the requirements of producing well on water pumping, cement cementing and possibly water filtering pipes, and ensure that the final well opening diameter of the geological exploratory well is not less than 91mm;
5) Experimental analysis, the system adopts water, gas, rock soil and other samples for analysis and identification, and related parameters of thermal storage are obtained;
6) Inputting the effective information obtained in the step 1-5 into a computer, converting a large amount of data into static or dynamic images or graphics to be presented to people by utilizing the data processing capacity of the computer, the computer images, the graphic basic algorithm and the visualization algorithm, and furthermore, allowing the extraction of the data and the display of pictures to be controlled by an interaction means so as to convert invisible phenomena hidden in the data into visible phenomena and obtain geological section information and existing geothermal information;
7) Dynamic monitoring, namely establishing a geothermal fluid dynamic monitoring network so as to master the natural dynamic and exploitation dynamic change rules of geothermal fluid, continuously monitoring the developed geothermal field on the basis of the existing observation point network so as to know the exploitation dropping funnel range and the development trend thereof, providing basic data for researching the environmental geological problems such as geothermal Tian Shuiwei (pressure) drop, ground subsidence or ground collapse, and the like, arranging observation wells so as to control geothermal reserves, establishing 1-2 controllable monitoring points for each geothermal field in the general investigation stage, establishing 1-2 heat stores in the detailed investigation stage, and establishing 2-3 heat stores in the exploration stage, wherein the monitoring content comprises: the monitoring frequency is determined according to different dynamic types, and the water level (pressure), temperature and flow are monitored, generally 2-3 times per month, and the water quality is monitored, generally 1-2 times per year.
Preferably, in the drilling, the design, construction and various tests in the exploration well of the step 4 should meet the requirements of finding geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within 100m depth not to be more than 10, the caliber of the exploration well should meet the requirements of sampling logging and installing water pumping test equipment after completion, the caliber of the exploration well should also meet the requirements of producing well design water pumping and cement cementing and possibly water filtering pipes, the final caliber of the geological exploration well should not be less than 91mm, all the requirements of 1-2 exploration wells should be obtained for each thermal field, and intermittent coring of the exploration well should be obtained, but the requirements of rock chip logging, drilling time logging and drilling fluid logging, rock core taking and rock chip logging should meet the requirements of dividing stratum, determining fracture zone, reservoir lithology and thickness and the like.
Preferably, in the drilling, the design, construction and various tests in the exploration well in the step 4 should meet the requirements of finding geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within 100m depth not to be more than 10, finding out the caliber of the exploration well to meet the requirements of sampling logging and installing water pumping test equipment after completion, finding out the combined well to meet the requirements of producing well design water extraction and cement cementing and possibly water filtering pipes, keeping the final well caliber of the geological exploration well to be not less than 91mm, and carrying out geophysical logging on the exploration well during and after completion, wherein the logging items depend on geological requirements, and the ordinary well section is used for logging, well inclination, resistivity, natural potential, natural gamma, well temperature and bottom temperature are measured, and density, acoustic wave, neutron and flow are measured for medium and low temperature large geothermal wells are also used for logging.
Preferably, in the step 4, the design, construction and various tests in the exploration well should meet the requirements of finding out geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out the pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within 100m depth not to be more than 10, the caliber of the exploration well should meet the requirements of sampling logging and installing pumping test equipment after completion, the caliber of the exploration well should meet the requirements of producing well design water pumping and cement well cementation and possibly water filtering pipes, the final well caliber of the geological exploration well is not less than 91mm, the target layer well section is required to be frequently observed, whether the change of the slurry tank liquid level and the slurry amount in the slurry tank is needed to be noted, the leakage amount and speed are changed, the performance before and after the leakage is recorded in detail, the well blowout, water leakage, sand, air, a block, hole shrinkage and other phenomena such as well drilling time, layer position and layer drawing, the detailed treatment requirements, the well drilling depth and layer drawing, the well drilling time and the well drilling time are recorded in detail, the well drilling time and the well drilling time is recorded continuously, the well drilling time is recorded and the well drilling time is recorded continuously, and the well drilling time is recorded and the well drilling time is measured and the well drilling time is recorded and the well logging time is recorded and the performance is recorded.
Preferably, in the experimental analysis in step 5, the system adopts samples such as water, gas, rock and soil to analyze and identify, so as to obtain relevant parameters of thermal storage, the chemical components of geothermal fluid are subjected to full analysis, microelement analysis, analysis of radioactive elements and total alpha total beta radioactivity, pollution indexes of hot springs and shallow buried thermal storage are increased according to circumstances, other analysis projects are added according to different utilization purposes, all exploration wells in each exploration stage are fully analyzed by geothermal fluid, 3-5 radioisotope detailed exploration stages can be taken, and 5-7 exploration stages are taken.
(III) beneficial effects
Compared with the prior art, the invention provides a high-efficiency geothermal resource investigation method based on a computer simulation technology, which has the following beneficial effects:
1. according to the efficient geothermal resource investigation method based on the computer simulation technology, through experimental analysis, a system acquires samples such as water, gas and rock and soil for analysis and identification, relevant parameters of thermal storage are obtained, computer data simulation is carried out, effective information obtained in the steps 1-5 is input into a computer, a large amount of data is converted into static or dynamic images or images to be displayed in front of people by utilizing the data processing capacity of the computer, the computer images, the graphic basic algorithm and the visualization algorithm, in addition, the extraction of the data and the display of the images are allowed to be controlled through interaction means, the phenomenon hidden in the data is converted into visible, geological profile information and geothermal information existing are obtained, and the geothermal resource distribution is calculated by a computer summarizing template formula, so that a large amount of manual analysis time can be saved, the efficiency is improved, and the manpower is saved.
2. According to the high-efficiency geothermal resource exploration method based on the computer simulation technology, through drilling, the design, construction and various tests in an exploration well are required to meet the requirements of finding out geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out the pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within 100m depth not to be more than 10, and the caliber of the exploration well is required to meet the requirements of sampling logging and installing water pumping test equipment after completion, and the caliber of a geological exploration well is required to be not less than 91mm, so that the analysis result is more reliable.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples: a high-efficiency geothermal resource investigation method based on a computer simulation technology comprises the following steps:
1) Geological measurement, namely selecting an area, combining the previous petroleum investigation data and geological investigation data of the area, and finding out stratum age, lithology characteristics, geological structure and magma activity of a geothermal field, wherein the regional map of the geological measurement map scale is 1/10 ten thousand-1/2.5 ten thousand, and the geothermal Tian Tujian is 1/5 ten thousand-1/2.5 ten thousand;
2) Geochemical investigation is carried out in each geothermal resource investigation stage, representative geothermal fluid, normal-temperature groundwater, surface water, atmospheric precipitation and other samples are adopted for assay analysis, the relation between the representative geothermal fluid, the ground water and the atmospheric precipitation is compared and analyzed, temperature scale calculation is carried out, deep thermal storage temperature is deduced, stable isotopes and radioactive isotopes are measured, the cause and age of the geothermal fluid are deduced, and the geochemical investigation scale is consistent with the geological measurement scale;
3) Geophysical investigation is carried out in the general investigation stage, the geothermal anomaly range and the spatial distribution of thermal reservoirs are defined, and the spatial distribution of substrate fluctuation and hidden fracture of a geothermal field is determined; for example, the north part of the Songliao basin is mainly layered thermal storage, the exploration generally utilizes an artificial earthquake method to accurately measure the fracture position, the occurrence and the thermal storage structure, utilizes a magnetotelluric current method to determine the thermal storage position and the occurrence of the geothermal Tian De, and the geophysical survey scale is consistent with the ground mapping scale;
4) Drilling, designing and constructing a exploratory well, and various tests in the exploratory well, wherein the exploratory well is required to meet geothermal geological conditions, obtain representative calculation parameters and evaluate geothermal resources, mainly find out pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keep the exploratory well vertical, ensure that the well inclination is not more than 10 in a depth of 100m, ensure that the caliber of the exploratory well meets the requirements of sampling logging and installing pumping test equipment after completion, ensure that the exploratory well also meets the requirements of producing well on water pumping, cement cementing and possibly water filtering pipes, and ensure that the final well opening diameter of the geological exploratory well is not less than 91mm;
5) Experimental analysis, the system adopts water, gas, rock soil and other samples for analysis and identification, and related parameters of thermal storage are obtained;
6) Inputting the effective information obtained in the steps 1-5 into a computer, converting a large amount of data into static or dynamic images or images by utilizing the data processing capacity of the computer and the characteristics of computer images, graphics basic algorithms and visualization algorithms, and displaying the static or dynamic images or the images in front of people, in addition, allowing the extraction of the data and the display of pictures to be controlled by interaction means, so that invisible phenomena hidden in the data are converted into visible, geological profile information and the geothermal information stored in the data are obtained, a geological model of a investigation region is built, a geological concept model is built according to the mathematical characteristics of the geological body in the region, the distribution and production, top and bottom plate burial depths, thicknesses, fracture production characteristics and the like of layers of different times of stratum are utilized, and a drilling geological histogram is combined, all drilling holes are strictly positioned by a GPS positioning system, so as to obtain field geographical coordinate information, so as to form a three-dimensional stereo map, the conventional theoretical knowledge is converted into the operable visual geological characteristics, the visual function of the GIS intuitively displays the information such as the distribution of the geological structure and each thermal storage layer, the geological heat source, the water source, the thermal guide layer, the thermal layer and the thermal storage layer are obtained, the thermal-coefficient is calculated by the thermal-water guide layer and the thermal-water-thermal-permeability coefficient, the thermal-water-storage layer and the thermal-coefficient is calculated, the thermal-coefficient is calculated by the relative to the thermal-storage layer, the thermal-coefficient is calculated, and the thermal-coefficient is calculated by the thermal-storage layer, and the thermal-coefficient is calculated by the relative thermal-coefficient value and the thermal-storage layer, and the thermal-coefficient value is calculated by the thermal-coefficient value and the thermal-coefficient value, and the thermal-storage layer data value, establishing a corresponding database and a database management system (DBMS), automatically generating point files of each well point, each dynamic monitoring point, each temperature measuring point and the like on a map according to longitude and latitude coordinates, automatically completing attribute hooking, arranging and calculating split points according to ground temperature gradient, fracture structure and development conditions of each thermal reservoir, combining drilling distribution, automatically forming a map, and then respectively reading in each thermal reservoir related data on different overlapped layers;
7) Dynamic monitoring, namely establishing a geothermal fluid dynamic monitoring network so as to master the natural dynamic and exploitation dynamic change rules of geothermal fluid, continuously monitoring the developed geothermal field on the basis of the existing observation point network so as to know the exploitation dropping funnel range and the development trend thereof, providing basic data for researching the environmental geological problems such as geothermal Tian Shuiwei (pressure) drop, ground subsidence or ground collapse, and the like, arranging observation wells so as to control geothermal reserves, establishing 1-2 controllable monitoring points for each geothermal field in the general investigation stage, establishing 1-2 heat stores in the detailed investigation stage, and establishing 2-3 heat stores in the exploration stage, wherein the monitoring content comprises: the monitoring frequency is determined according to different dynamic types, and the water level (pressure), temperature and flow are monitored, generally 2-3 times per month, and the water quality is monitored, generally 1-2 times per year.
Step 4, drilling, the design, construction and various tests in the exploration well are required to meet the requirements of finding out geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out the pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within 100m depth not to be more than 10, the caliber of the exploration well is required to meet the requirements of sampling logging and installing water pumping test equipment after completion, the caliber of the exploration well is required to meet the requirements of designing water pumping and cement well cementation and possibly water filtering pipes in the production well, the caliber of the final well of the geological exploration well is not less than 91mm, 1-2 exploration wells are required to be fully cored, the geological exploration well is required to be intermittently cored, but the requirements of cutting logging, logging and drilling fluid logging during drilling are required to be made, the requirements of dividing formation, determining the lithology and thickness of a reservoir are required to be met, the design, the geothermal tests in the exploration well is required to meet the requirements of the design, the geothermal tests in the production well and the geothermal wells are required to be met, the requirements of the geothermal drilling fluid is required to be found out in the geological conditions, the geological conditions are required to be met, the geological conditions are required to be not to be met, the geological conditions are required to be met to be completely, the geological conditions are required to be fully filled with 1-2, the exploration well is required to be completely, the drilling well is required to be intermittently, the drilling well is required to be filled, the drilling well is required to be made, and the drilling rock cuttings logging and drilling fluid is required to be and the well is required to be well to be required to be In addition to the items of well temperature, bottom temperature and the like, steady-state well temperature measurement is carried out after well completion, the medium-low temperature large geothermal field is also used for density, sonic wave, neutron and flow logging, the drilling is carried out in the step 4, the design, construction and various tests in the exploration well are required to meet the requirements of geothermal geological condition finding, representative calculation parameters and geothermal resource evaluation are obtained, the pressure, water level, temperature, flow and geothermal fluid quality of thermal storage are mainly found out, the exploration well is kept vertical, the well deviation is not more than 10 within the depth of 100m, the caliber of the exploration well is required to meet the requirements of sampling logging and water pumping test equipment mounting after well completion, the exploration and production well is required to meet the requirements of water pumping and cement cementing of production well design and possibly water filtering pipes, the final caliber of the geological exploration well is not less than 91mm, and the target layer well section is required, the changes of the liquid level of the slurry tank and the slurry amount in the slurry tank must be observed frequently, whether the leakage occurs, the leakage amount and the speed are noted, the changes of the slurry performance before and after the leakage are noted, the starting and stopping time, the well depth, the layer position, the treatment measures adopted and the like of phenomena such as water burst, well blowout, water leakage, sand burst, gas escaping, block falling, hole collapse, diameter shrinkage and the like of drilling are recorded in detail, the well kick or the well blowout is also observed in detail, the water burst amount and the height are also noted, the continuous or intermittent water burst law, the changes of the slurry performance before and after the water burst and the like are also observed in detail, the temperature change of the slurry at the wellhead is measured by the system, the conditions such as the starting and stopping time, the well depth, the layer position, the degree of the oil burst and the drilling condition are carefully recorded in the drilling process, the analysis and judgment in terms of quality are carried out, the experimental analysis and the identification are carried out on samples such as water, gas, rock soil and the like are adopted by the system, the method is characterized in that the method comprises the steps of obtaining relevant parameters of thermal storage, carrying out full analysis, microelement analysis and analysis of radioactive elements and total alpha total beta radioactivity on chemical components of geothermal fluid, carrying out analysis on pollution indexes of hot springs and shallow thermal storage according to conditions, adding other analysis projects according to different utilization purposes, fully sampling exploration wells in each exploration stage of the full analysis of the geothermal fluid, wherein the number of the exploration stages of the radioisotope is 3-5, and the number of the exploration stages is 5-7.
The beneficial effects of the invention are as follows: the method for surveying the high-efficiency geothermal resources based on the computer simulation technology comprises the steps of analyzing and identifying samples such as water, gas, rock and the like by a system through experimental analysis to obtain relevant parameters of thermal storage, inputting the effective information obtained in the steps 1-5 into a computer through computer data simulation, converting a large amount of data into static or dynamic images or graphics to be presented in front of people by utilizing the data processing capacity of the computer and computer images, graphic basic algorithms and visual algorithms, controlling the extraction of the data and the display of pictures through interaction means, converting invisible phenomena hidden in the data into visible phenomena to obtain geological profile information and existing geothermal information, calculating geothermal resource distribution by a computer summary template formula can save a large amount of manual analysis time, the efficiency is improved, the manpower is saved, the design, construction and various tests in the exploration well are required to meet the requirement of finding out geothermal geological conditions through drilling, representative calculation parameters and the requirement of evaluating geothermal resources are obtained, the pressure, the water level, the temperature, the flow and the geothermal fluid quality of thermal storage are mainly found out, the exploration well is kept vertical, the well inclination of the exploration well is not more than 10 within the depth of 100m, the caliber of the exploration well is required to meet the requirements of sampling logging and installing water pumping test equipment after completion, the requirement of producing well design water pumping capacity, cement well cementation and possibly water filtering pipes are met by the exploration combination well, the final well caliber of the geological exploration well is not less than 91mm, the analysis is carried out by the on-site exploration combination of the existing data, the analysis result is more reliable, the problem that various collected data in the traditional geothermal resource exploration is subjected to manpower calculation analysis is solved, time and labor are wasted.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The efficient geothermal resource investigation method based on the computer simulation technology is characterized by comprising the following steps of:
1) Geological measurement, namely selecting an area, combining the previous petroleum investigation data and geological investigation data of the area, and finding out stratum age, lithology characteristics, geological structure and magma activity of a geothermal field, wherein the regional map of the geological measurement map scale is 1/10 ten thousand-1/2.5 ten thousand, and the geothermal Tian Tujian is 1/5 ten thousand-1/2.5 ten thousand;
2) Geochemical investigation is carried out in each geothermal resource investigation stage, representative geothermal fluid, normal-temperature groundwater, surface water and atmospheric precipitation samples are adopted for assay analysis, the relation between the representative geothermal fluid, the normal-temperature groundwater, the surface water and the atmospheric precipitation samples and the geothermal fluid is compared and analyzed, temperature scale calculation is carried out, deep thermal storage temperature is deduced, stable isotopes and radioactive isotopes are measured, the cause and age of the geothermal fluid are deduced, and the geochemical investigation scale is consistent with the geological measurement scale;
3) Geophysical investigation is carried out in the general investigation stage, the geothermal anomaly range and the spatial distribution of thermal reservoirs are defined, and the spatial distribution of substrate fluctuation and hidden fracture of a geothermal field is determined; the north part of the Songliao basin is mainly layered thermal storage, the position, the shape and the thermal storage structure of a fracture are accurately measured by an artificial earthquake method in investigation, the thermal storage position and the scale of the geothermal Tian De are determined by a magnetotelluric current method, the geophysical survey scale is consistent with the ground mapping scale, the obtained geophysical prospecting data are analyzed by combining geothermal geological conditions and geothermal fluid characteristics, and comprehensive interpretation results are provided and are used as the arrangement basis of exploration wells;
4) The method comprises the steps of drilling, designing and constructing a exploratory well, various tests in the exploratory well, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out the pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploratory well vertical, keeping the well inclination within the depth of 100m not greater than 10, and setting pumping test equipment requirements after the exploratory well is completed, wherein the exploratory well caliber is required to meet the requirements of the production well on design water pumping and cement cementing and water filtering pipe descending, and the geological exploratory well final well mouth diameter is not less than 91mm;
5) Experimental analysis, wherein the system adopts water, gas and rock and soil samples for analysis and identification to obtain relevant parameters of thermal storage;
6) Inputting the effective information obtained in the step 1-5 into a computer, converting a large amount of data into static or dynamic images or graphics to be presented to people by utilizing the data processing capacity of the computer, the computer images, the graphic basic algorithm and the visualization algorithm, and furthermore, allowing the extraction of the data and the display of pictures to be controlled by an interaction means so as to convert invisible phenomena hidden in the data into visible phenomena and obtain geological section information and existing geothermal information;
establishing a geological model of a investigation region, establishing a geological concept model according to the mathematical characteristics of geological bodies in the region, utilizing the distribution and the occurrence of different strata, the burial depth of a top plate and a bottom plate, the thickness and the fracture occurrence characteristics of the top plate and the bottom plate, combining a borehole geological histogram, strictly positioning each borehole position through a GPS positioning system, acquiring field geographic coordinate information, making a three-dimensional stereogram, digitizing various information of a heat source, a water source, a thermal reservoir and a cover layer of the investigation region on the basis, establishing a spatial three-dimensional thermal storage mathematical model, quantifying each thermal reservoir information, respectively calculating the respective geothermal resource amount, mainly quantifying the top plate burial depth, the thickness, the sand-mud ratio, the thermal storage top plate temperature value, the geothermal fluid chemical characteristic value, geothermal water dynamic monitoring data, the permeability coefficient, the water conductivity coefficient and other hydrogeological parameters of each thermal reservoir, establishing a corresponding database and a database management system, automatically generating point files of each point, dynamic point and temperature measuring point on the map according to the latitude coordinates, automatically completing hanging, automatically reading the thermal gradient map, automatically distributing and analyzing the thermal gradient map, respectively, and then respectively combining the thermal gradient map with each thermal reservoir map;
7) Dynamic monitoring, namely establishing a geothermal fluid dynamic monitoring network so as to master the natural dynamic and exploitation dynamic change rules of geothermal fluid, continuously monitoring the developed geothermal field on the basis of the existing observation point network so as to know the exploitation dropping funnel range and the development trend thereof, providing basic data for researching the water level pressure drop of the geothermal field, ground subsidence or ground subsidence environmental geology problems, arranging observation wells so as to control geothermal reserves, establishing 1-2 control monitoring points for each geothermal field in a general investigation stage, establishing 1-2 heat storages for each heat storage in a detail investigation stage, establishing 2-3 heat storages in an exploration stage, and monitoring contents comprise: the monitoring frequency is determined according to different dynamic types, and the water level, the pressure, the flow, the temperature and the chemical components of the hot fluid are monitored, wherein the water level, the pressure, the flow, the temperature and the chemical components of the hot fluid are monitored 2-3 times a month, and the water quality is monitored 1-2 times a year.
2. The method for efficient geothermal resource exploration based on computer simulation technique of claim 1, wherein: the drilling, construction and various tests in the exploration well are required to meet the requirements of finding geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within 100m depth not to be more than 10, meeting the requirements of sampling logging and installing pumping test equipment after completion, and meeting the requirements of producing well design water pumping and cement cementing and water filtering pipe descending, wherein the diameter of a geological exploration well is not less than 91mm, all coring is required for each thermal field, but intermittent coring is required for the exploration well, logging and drilling fluid logging are required, and the requirements of dividing stratum, determining fracture zone and reservoir lithology and thickness are met by adopting a core and the cuttings logging.
3. The method for efficient geothermal resource exploration based on computer simulation technique of claim 1, wherein: the drilling, construction and various tests in the exploration well in step 4 are required to meet the requirements of finding geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out the pressure, water level, temperature, flow and geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within the depth of 100m not greater than 10, and the caliber of the exploration well is required to meet the requirements of sampling logging and installing pumping test equipment after completion, and the caliber of the exploration well is required to meet the requirements of producing well design water pumping capacity, cement cementing and water filtering pipe, wherein the caliber of the final well of the geological exploration well is not less than 91mm, geophysical logging is required during and after completion of the exploration well, logging items are determined by geological requirements, well section well diameter, well inclination, resistivity, natural potential field, natural gamma, well temperature and bottom temperature items, and after completion, steady-state well temperature measurement is carried out, and density, acoustic wave, neutron and flow logging is also required to be carried out on medium-low temperature large geothermal wells.
4. The method for efficient geothermal resource exploration based on computer simulation technique of claim 1, wherein: the drilling, the design, the construction and the various tests in the exploration well of the step 4 are required to meet the requirements of finding out geothermal geological conditions, obtaining representative calculation parameters and evaluating geothermal resources, mainly finding out the pressure, the water level, the temperature, the flow and the geothermal fluid quality of thermal storage, keeping the exploration well vertical, keeping the well inclination within the depth of 100m not more than 10, meeting the requirements of sampling logging and installing pumping test equipment after completion, and meeting the requirements of designing pumping capacity and cementing of a production well and being capable of being put into a drainage pipe by a exploration combination well, wherein the caliber of the final well of the geological exploration well is not less than 91mm, the purpose layer well section is required to be frequently observed for the change of the slurry level of a slurry tank and the slurry amount in the slurry tank, the method is characterized in that whether leakage occurs or not, the leakage amount, the speed and the change of slurry performance before and after leakage occur are noted, the water burst, blowout, water leakage, sand burst, gas escape, block dropping, hole collapse and shrinkage phenomena are recorded in detail, the starting and stopping time, the well depth and the layer position of the drilling are recorded, the blowout or blowout is also observed in detail, the blowout amount and the height are recorded, the continuous or intermittent blowout law and the slurry performance change before and after the blowout are measured, the temperature change of wellhead slurry is measured by the system, the encryption observation is performed and recorded when the wellhead slurry is drilled into a thermal storage target interval, and the starting and stopping time, the well depth, the layer position, the jump degree and the drilling condition are recorded carefully in the drilling process, and analysis and judgment in terms of quality are made.
5. The method for efficient geothermal resource exploration based on computer simulation technique of claim 1, wherein: and 5, performing experimental analysis, namely analyzing and identifying water, gas and rock soil samples by a system to obtain related parameters of thermal storage, performing full analysis, microelement analysis, analysis of radioactive elements and total alpha total beta radioactivity on chemical components of geothermal fluid, optionally adding pollution indexes for hot springs and shallow buried thermal storage, adding other analysis projects according to different utilization purposes, fully analyzing all exploration wells in each exploration stage by the geothermal fluid, taking 3-5 radioactive isotopes in the detailed exploration stage, and 5-7 exploration stages.
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| CN112860926B (en) * | 2021-01-29 | 2023-07-28 | 北京城建勘测设计研究院有限责任公司 | Graph superposition generation method applied to geotechnical engineering investigation industry |
| CN113076883B (en) * | 2021-04-08 | 2022-05-06 | 西南石油大学 | Blowout gas flow velocity measuring method based on image feature recognition |
| CN113847015B (en) * | 2021-09-30 | 2023-12-22 | 中核坤华能源发展有限公司 | Real-time judging method for thermal reservoir position in high-temperature geothermal drilling process |
| CN114370267B (en) * | 2021-12-17 | 2023-06-13 | 核工业北京地质研究院 | Real-time calculation method for drilling heat storage temperature in high-temperature geothermal field drilling process |
| CN116661354B (en) * | 2023-06-12 | 2023-12-01 | 广州宝能能源管理股份有限公司 | Remote monitoring management method and system for sterile hot water system |
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