CN109633779A - A kind of heat transfer structure recognition methods suitable for geothermal prospecting - Google Patents
A kind of heat transfer structure recognition methods suitable for geothermal prospecting Download PDFInfo
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- CN109633779A CN109633779A CN201811550106.3A CN201811550106A CN109633779A CN 109633779 A CN109633779 A CN 109633779A CN 201811550106 A CN201811550106 A CN 201811550106A CN 109633779 A CN109633779 A CN 109633779A
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
- G01V9/005—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00 by thermal methods, e.g. after generation of heat by chemical reactions
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Abstract
The invention belongs to geothermal prospecting technical fields, and in particular to a kind of heat transfer structure recognition methods suitable for geothermal prospecting.The present invention is the following steps are included: rice temperature measurement in step 1, the area of geothermal anomaly；Step 2, rice temperature measurement abnormal point single-node analysis；The identification of heat transfer structure in step 3, the area of geothermal anomaly.The present invention can establish the geologic feature mark of heat transfer structure in a set of area of geothermal anomaly, rice temperature measurement mark, store up Scale Evaluation analysis for heat transfer structure identification and area of geothermal anomaly heat in the area of geothermal anomaly and provide foundation.
Description
Technical field
The invention belongs to geothermal prospecting technical fields, and in particular to a kind of heat transfer structure identification side suitable for geothermal prospecting
Method.
Background technique
Underground heat is the natural energy resources contained in earth interior.Main carrier of the geothermal fluid as Development of Geothermal Resources,
With water resource and mineral resources double attribute, function is more, purposes is wide, is valuable clean resource.Geothermal energy is a kind of green
Color low-carbon, recyclable clean energy resource, underground heat comprehensive development and utilization meet center about Ecological Civilization Construction, innovation and development
Etc. a series of strategic thoughts and important measure, to readjusting the energy structure, energy-saving and emission-reduction, improve environment, cultivate new industry, novel
Urbanization Construction, creating more jobs etc. is of great significance.The distribution of geothermal energy resources is strictly controlled by construction.As on the heat of deep
The channel risen, the scale and depth of heat transfer structure have often directly controlled the range and scale of geothermal field, have determined geothermal energy resources
The size of amount.How the heat transfer structure of geothermal area and its periphery quickly and effectively to be identified during geothermal prospecting, at
For a vital task during Exploration of Geothermal Resources.
The ground such as geologic survey, remote Sensing Interpretation and AMT are mainly passed through to the identification constructed in the area of geothermal anomaly in the prior art
The work such as ball physical measurement are realized.It is time-consuming, laborious, expensive since that there are accuracy of identification is not high for three of the above method, work effect
The disadvantages of rate is low, and directly effective reflection cannot be carried out to latent heat transfer structure and deep heat transfer structure.Therefore, it is necessary to
A set of quickly and effectively heat transfer structure identification technology is established, Fast Evaluation is carried out to geothermal prospecting area underground heat prospect.
Summary of the invention
Present invention solves the technical problem that: the present invention provides a kind of heat transfer structure recognition methods suitable for geothermal prospecting,
Geologic feature mark, the rice temperature measurement mark of heat transfer structure in a set of area of geothermal anomaly can be established, to lead in the area of geothermal anomaly
Thermotectonics identification and the storage Scale Evaluation analysis of area of geothermal anomaly heat provide foundation.
The technical solution adopted by the present invention:
A kind of heat transfer structure recognition methods suitable for geothermal prospecting, comprising the following steps: in step 1, the area of geothermal anomaly
Rice temperature measurement；Step 2, rice temperature measurement abnormal point single-node analysis；The identification of heat transfer structure in step 3, the area of geothermal anomaly.
The step 1 includes the following steps: to select the region near geothermal discrepancy and its earth's surface heat anomaly to carry out the survey of rice temperature
Amount measures the depths 1m temperature when there is soil cap rock, when earth's surface is water body, measures water temperature.
The method that rice temperature measurement uses area measurement, scale bar 1:10000；Scale bar is bigger, and subsequent analysis result is got over
Accurately.
The step 2 includes the following steps: that the rice temperature measurement result for obtaining step 1 projects to geologic map or high-precision
On remote sensing images；Each rice temperature measurement data selected are marked out to come on the diagram；Single-point point is carried out to measurement result on the image
Analysis.
The single-node analysis method are as follows: one rice temperature measurement profile analysis abnormal point of selection；After noting abnormalities a little, by temperature
Abnormal point marks out on the diagram to be come；The abnormal point in rice temperature measurement region on other measurement sections is analyzed again；It will measurement
It obtains whole abnormal points in the process and marks out in geologic map or remote sensing figure.
The abnormal point is the point for being higher by 2 DEG C of temperature averages or more.
The place that the geothermal discrepancy point obtained in step 2, as heat transfer structure pass through, in conjunction with geologic information, analysis and research
The trend mainly constructed in region will obtain abnormal point and connect, as the heat transfer structure in survey region.
Beneficial effects of the present invention:
(1) present invention provides a kind of heat transfer structure recognition methods suitable for geothermal prospecting, and it is different can to establish a set of underground heat
Geologic feature mark, the rice temperature measurement mark of heat transfer structure in normal area are that heat transfer structure identification and underground heat are different in the area of geothermal anomaly
Normal area's heat storage Scale Evaluation analysis provides foundation；
(2) present invention can be used for China by the identification of heat transfer structure in the high temperature area of geothermal anomaly of construction control；This hair
It is bright to be based on specific rice temperature measurement as a result, being analyzed in conjunction with existing geologic information, strong operability, as a result reliably；
(3) present invention is of great significance for the identification of heat transfer structure in the area of geothermal anomaly；This method breaches tradition
Rice temperature measurement result contour analysis method, the finer single-node analysis method of use；In analytic process, except can enclose
Determine to can be combined with outside temperature anomaly area the position that structural analysis in region obtains heat transfer structure, to improve a meter temperature measurement result
Data utilization rate, provide more foundations for the evaluation of geothermal resource prospecting and geothermal energy resources.
Detailed description of the invention
Fig. 1 is continuous basin south part rice temperature measurement data advanced in years；
Fig. 2 is that the heat transfer structure location drawing is inferred in continuous basin south advanced in years.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
By taking the continuous identification for stepping area control thermotectonics in Tibet Nimu County as an example, one kind provided by the invention is suitable for geothermal prospecting
Heat transfer structure recognition methods, comprising the following steps:
Step 1, the continuous area rice temperature measurement that steps in Nimu County work
Carry out geothermal energy resources investigation work in the continuous area that steps in Nimu County, and carries out the work such as rice temperature measurement, and real
Geothermal borehole is applied.It due to various reasons, reconnoitres that the effect is unsatisfactory, fails to disclose to preferable geothermal discrepancy.
The mild heat flow value in ground is most direct mark existing for the area of geothermal anomaly extremely, and substantially not by all kinds of rock thermal conductivities
The influence of rate, the hot situation of each department more can be comprehensively reflected compared with geothermal gradient value, therefore will be seen that depth by heat-flow measurement
The geologic feature on portion stratum.Thus during carrying out heat transfer structure identification, we are innovative using rice temperature measurement
Method.
In this task, worked first according to the rice temperature measurement that specification has carried out continuous area ten thousand scale bar of 1:1 advanced in years.Rice temperature is surveyed
During amount, for the reliability for guaranteeing measurement result, the depths 1m temperature is measured when there is soil cap rock, earth's surface is water body (spring point)
When, water temperature is measured, every measures 3 times, when relative error is less than 0.1 DEG C between measurement result three times, record measurement temperature
Value.Finally, two panels rice temperature abnormality area, the respectively village the Xu Mai south area of geothermal anomaly and the village Xu Mai west are obtained in the continuous area south that steps
The area of geothermal anomaly.
Step 2, rice temperature measurement abnormal point single-node analysis
After completing rice temperature measurement, all rice temperature measurement points are projected on high-precision remote sensing images, and by each point
Temperature data mark out on the diagram come.This remote sensing images used is the remote sensing image (Fig. 1) on dimension map difficult to understand.For convenience
Illustrate, the rice temperature data in southern three rice temperature measurement sections are only shown in the figure.
From the point of view of the above three rice temperature measurement section, there is the higher abnormal point of portion temperature in every section.For side
Just it illustrates, southern three sections are respectively designated as L1, L2 and L3 by us from south to north.The mean temperature of L1 section is on 20 DEG C of left sides
It is right.Third temperature is 24 DEG C to section from left to right, and the point adjacent compared with its is higher by 2 DEG C, and the mean temperature compared with the section is higher by 4 DEG C；
Eight temperature is 23 DEG C to section from left to right, and the point adjacent compared with its is higher by 2 DEG C and 1 DEG C respectively, is higher by 3 DEG C compared with mean temperature.Cause
This, it is concluded that the place that the two points may pass through for construction.Using same analysis aspect, on L2 section, we recognize
To there is temperature anomaly point at least three, these abnormal points are higher by about 4-5 DEG C of the section mean temperature；On L2 section, we
Think there is temperature anomaly point at least 2, it is respectively 10 DEG C and 2 DEG C that these abnormal points, which are higher by adjacent temperature measuring point,.From three
From the point of view of section, the mean temperature highest of L3 line shows L3 line closer to the center of heat anomaly.
After the analysis for completing rice temperature measurement abnormal point, these abnormal points are marked out to come on the diagram, is subsequent thermally conductive structure
The analysis made provides material.
In analytic process, it should be noted that check a meter temperature measurement record, reject the temperature due to caused by human factor and climatic factor
Spend abnormal point.
The identification of heat transfer structure in step 3, the area of geothermal anomaly
Early-stage study data shows that the heat in the continuous area of geothermal anomaly advanced in years contains two types: one kind is that the 4th system's heat is stored up, separately
One kind is that bedrock fracture type heat is stored up.And the 4th system's heat storage mostly bedrock fracture type heat storage rises to earth's surface institute by heat transfer structure
It causes.It can therefore be concluded that the higher rice temperature abnormality point of temperature in the area of geothermal anomaly is the place that heat transfer structure passes through.
Early period tectonic cycle period the result shows that, the area mainly control thermotectonics be north-south, therefore its heat transfer structure may for control heat
The secondary construction of construction, trend is also based on north-south.According to this understanding, will be obtained in rice temperature measurement abnormal point single-node analysis
The rice temperature abnormality point north-south obtained connects, and just obtains the heat transfer structure (Fig. 2) in the area.
It is verified through AMT geophysics section, the position of this three heat transfer structure inferred and geophysics low-resistivity
It is abnormal identical preferable, show that this three heat transfer structures inferred are implicitly present in.Deployment for later period geothermal borehole provides foundation.
The present invention is suitable for China Tibet and other are controlled the identification of the high-temperature geothermal exceptions area internal control thermotectonics of heat by construction.
The analysis method and verification method of above-mentioned control thermotectonics are only best practice and scheme of the invention, but the present invention is not limited to above-mentioned
Analysis method and case study on implementation.Those skilled in the art within the scope of knowledge, can not depart from present inventive concept
Under the premise of more effective analysis method and estimating method proposed according to the actual characteristic of heat transfer structure in this research area.
Claims (7)
1. a kind of heat transfer structure recognition methods suitable for geothermal prospecting, it is characterised in that: the following steps are included: step (1),
Rice temperature measurement in heat anomaly area；Step (2), rice temperature measurement abnormal point single-node analysis；Thermally conductive structure in step (3), the area of geothermal anomaly
The identification made.
2. a kind of heat transfer structure recognition methods suitable for geothermal prospecting according to claim 1, it is characterised in that: described
Step (1) includes the following steps: to select the region near geothermal discrepancy and its earth's surface heat anomaly to carry out rice temperature measurement, is there is soil
The depths 1m temperature is measured when cap rock, when earth's surface is water body, measures water temperature.
3. a kind of heat transfer structure recognition methods suitable for geothermal prospecting according to claim 2, it is characterised in that: meter Wen
The method that measurement uses area measurement, scale bar 1:10000；Scale bar is bigger, and subsequent analysis result is more accurate.
4. a kind of heat transfer structure recognition methods suitable for geothermal prospecting according to claim 2, it is characterised in that: described
Step (2) includes the following steps: that the rice temperature measurement result for obtaining step (1) projects to geologic map or high-precision remote sensing images
On；Each rice temperature measurement data selected are marked out to come on the diagram；Single-node analysis is carried out to measurement result on the image.
5. a kind of heat transfer structure recognition methods suitable for geothermal prospecting according to claim 4, it is characterised in that: described
Single-node analysis method are as follows: one rice temperature measurement profile analysis abnormal point of selection；After noting abnormalities a little, on the diagram by temperature anomaly point
It marks out and；The abnormal point in rice temperature measurement region on other measurement sections is analyzed again；It is complete by being obtained in measurement process
The abnormal point in portion marks out in geologic map or remote sensing figure to be come.
6. a kind of heat transfer structure recognition methods suitable for geothermal prospecting according to claim 5, it is characterised in that: described
Abnormal point is the point for being higher by 2 DEG C of temperature averages or more.
7. a kind of heat transfer structure recognition methods suitable for geothermal prospecting according to claim 4, it is characterised in that: step
(2) place that the geothermal discrepancy point obtained in, as heat transfer structure pass through, it is main in region of analyzing and researching in conjunction with geologic information
The trend of construction will obtain abnormal point and connect, as the heat transfer structure in survey region.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110646859A (en) * | 2019-08-29 | 2020-01-03 | 郑州地美特新能源科技有限公司 | Heat source tracking method |
| CN113222909A (en) * | 2021-04-25 | 2021-08-06 | 河南省航空物探遥感中心 | Geothermal region judgment method based on multispectral optical remote sensing image |
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