CN104131807A - Test method and test observation system for medium-high-temperature geothermal individual-well yield determination - Google Patents
Test method and test observation system for medium-high-temperature geothermal individual-well yield determination Download PDFInfo
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- CN104131807A CN104131807A CN201410328248.0A CN201410328248A CN104131807A CN 104131807 A CN104131807 A CN 104131807A CN 201410328248 A CN201410328248 A CN 201410328248A CN 104131807 A CN104131807 A CN 104131807A
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Abstract
The invention relates to a test method and a test observation system for medium-high-temperature geothermal individual-well yield determination. The method and the system mainly comprise the following steps and contents that: step 1, the test scheme is set according to the features of a geothermal well, wherein the test scheme includes the arrangement and installation of in-well and out-of-well test observation systems, flow rate order setting in blowout tests and observation contents of the tests; step 2, the tests and the observation are carried out according to the scheme, and observation data of temperature and pressure of two test observation series of a ground surface blowout end opening and an in-well heat storage section in the whole test process are recorded; and step 3, the individual-well yield under the in-well heat storage thermodynamic balance condition is analyzed and evaluated, wherein the operation includes the process of analyzing and processing observation data, drawing yield and in-well heat storage section temperature balance relation curves and evaluating the sustainably realized individual-well yield supply boundary. The method aims at the limited supply of natural resources, and provides scientific basis for developing geothermal energy engineering.
Description
Technical field
The invention belongs to geothermal well experimental technique field, be specifically related to test method and test observation system that middle high-temperature geothermal well yield is measured.
Background technology
Underground heat is the energy resources that the earth self possesses.Middle high-temperature geothermal resource can be used for preparing the energy (as generating, heating etc.), has huge potentiality to meeting mankind's energy demand.Under the prerequisite of preserving the ecological environment; middle high-temperature geothermal resource reconnoitre exploitation, to realizing non-fossil energy target, advancing production of energy and consumption revolution, alleviation China energy resources to supply with pressure, promote the aspects such as Ecological Civilization Construction to have important practical significance and long-range strategic importance.Utilizing geothermal energy resources to prepare the energy, is the ultimate aim of exploitation and utilization of geotherm resources.Middle high-temperature geothermal resource has following three important essential characteristics: 1., high-temperature geothermal resource is the intrinsic property material attribute of the earth itself, has the limit property supplied with; 2. all kinds of geologic bodies are likely all to compose the mounting medium of depositing middle high-temperature geothermal resource; 3. the form that middle high-temperature geothermal resource exists has diversity, can set foot in exploitation with current mankind science and technology ability, and the common supporter of existing geothermal fluid and heat energy also has pure hotlist only to show and without the form (as hot dry rock) of geothermal fluid.
Based on above target and feature, the inventor proposes Thermal Power Engineering (Engineering of Geothermal Power as follows, be called for short EGP) concept: geothermal energy engineering, refer to for middle high-temperature geothermal resource, taking minimum ambient influnence cost (quantitatively evaluating of this impact can be accepted at safety, the aspect such as sustainable) as prerequisite, there is the heat energy of sustainable supply meaning to extract as target to realize, man-made recovery or prepare the technical method of heat energy and the set of technique.Having sustainable supply meaning to refer to investigated with the relatively long time, the supply of geothermal energy is relatively stable, on the basis that meets economic evaluation, for developed underground heat geologic element, if continue to extract the heat energy of certain scale, it is stable that the temperature of geologic body can keep within the specific limits.
The inventor thinks, the disclosed heat storage of middle high-temperature geothermal well is composed while depositing geothermal fluid, store up as research object taking geothermal well and heat, geothermal fluid enters geothermal well and is directly exploited from heat storage as heat energy carrier medium, and thermal procession is by the transmission of the quality transmission generation energy of geothermal fluid; The disclosed heat storage of geothermal well, no matter whether tax deposits any fluid, build the heat-exchange system being formed by geothermal well and bore hole heat exchanger (assembly), store up as research object taking heat-exchange system and heat, thermal procession is to complete the interchange of heat between heat-exchange system and heat storage by the motion of working medium in heat exchanger, and energy transmission is heat transfer process.Above-mentioned two kinds of situations, the geologic body occurrence temperature that is extracted heat energy changes, and is that the limited supply of geothermal energy resources makes so, the yield trials of the hot individual well in old place or change calorimetric test and all should be conceived to heating power equalization problem.
For the yield trials of middle high-temperature geothermal individual well, it should be noted that: generally only carry out once at present maximum open flow test, the stable data of temperature, pressure and flow by observation earth's surface blow-out release device port geothermal fluid, adopt James Boucherie process through the well yield of heating power computational discrimination.In " geothermal energy resources geological exploration norm " (GB/T 11615-2010) 7.6.4.1 money, to the requirement of individual well open flow test be: " can first calculate the hot potentiality of individual well with Boucherie process.Accurate Determining must carry out vapour at well head, water separates, measure respectively vapour, discharge and temperature under different pressures, and measure the incondensable gas content in separate vapour, determine heat content and the hot fluid output of individual well, draw well head pressure, output and the relation curve of temperature, flow and time.Time on test is no less than 360h ".But there is not yet so far the test case that meets above-mentioned normative content requirement, the quantitative assessment of well yield at present still exists uncertain factor, this is likely one of reason that in production application, decay occurs in part well yield.
Summary of the invention
An object of this invention is to provide the test method that a kind of middle high-temperature geothermal well yield is measured, the ground thermal yield supply boundary that adopts the method can quantitative assessment underground heat individual well can obtain under hot heat accumulation power equilibrium condition in well, determine the rational yield of individual well, the foundation of science is provided for carrying out geothermal energy engineering.
Another object of the present invention is to provide a set of test observation system of testing for carrying out high-temperature geothermal well yield, and this system structure design is scientific and reasonable, is easy to control.
For reaching above object, the technical solution used in the present invention is: the test method that middle high-temperature geothermal well yield is measured, mainly comprises the following steps:
The first step, base area hot well feature, sets the testing program for the well yield of quantitative assessment high-temperature geothermal;
Second step, carries out multistage test and observation by testing program, obtains observation data, and described observation data comprises testing carries out well corresponding to overall process inside and outside temperature, pressure data;
The 3rd step, the observation data obtaining according to second step, analyzes in the test of each order in well the relation of output and heat storage section mean temperature difference under hot heat accumulation power equilibrium condition, calculates and tries to achieve the output boundary value E under hot heat accumulation power equilibrium condition in individual well well
0.
Further, the concrete grammar of the first step comprises:
(a) base area hot well feature, the way of realization of determining testing program is multistage constant flow open flow test;
(b) base area hot well feature, determines the mount scheme of the inside and outside observation instrument for thermometric, pressure measurement of well;
(c) scope of hot well feature in base area reflects flow scale, temperature, pressure, the direction order of dividing the flow order of multistage open flow test and carrying out open flow test by order;
(d) base area hot well feature, determines the observation content of testing, and described observation content comprises the temperature and pressure of the interior heat storage of flow, temperature and pressure and the well of earth's surface open flow port fluid (steam state and liquid state) section.
Further again, in second step, carry out theing contents are as follows of test and observation by testing program:
(a) carry out respectively installation, the debugging of observation instrument according to testing program;
(b) measure the original temperature T before heat storage is unminded
0;
(c) according to the test direction order of setting, control the order of open flow port flow, carry out open flow test, and in the observation process of each flow order, gather and record the observation data of two test observation series in ground open flow port and geothermal well.
Further, in the 3rd step, first the observation data in observation data and the geothermal well of each order test earth's surface open flow port is analyzed, draws respectively the inside and outside temperature-time curve of well, pressure time histories, rate-time relationship curve.
Again further, the concrete methods of realizing of the 3rd step comprises:
(a) for the open flow test of each flow order:
(a1) utilize the observation data of ground open flow port test observation series, the data under analytical test stable state, according to James Boucherie process, adopt following formula 1. to calculate the output E that this flow order is corresponding
i,
Formula 1. in, i represents flow order, d represents blooie pipe internal diameter, cm; P
cirepresent the port pressure recording after i flow order open flow is stablized, bar;
(a2), according to the temperature data of observation, calculate the mean temperature difference Δ T of heat storage section in this flow order geothermal well
i;
(b) the geothermal well output E each flow order observation station being obtained
imean temperature difference Δ T with heat storage section in geothermal well
idraw E-Δ T equalizer curve, have the flex point that E is zero to Δ T first derivative on E-Δ T equalizer curve, the tangent line at this flex point place is parallel to Δ T axle, and this puts corresponding E
0be worth, be the boundary value of output under the interior hot heat accumulation power equilibrium condition of individual well well, as the impact of not considering that periphery exploitation is disturbed, this geothermal well exploitation heat can not be greater than E
0; E-Δ T equalizer curve is expressed as to the functional form of formula shown in 2., solves coefficient A, B, this functional form has been expressed at E
0e-Δ T relation under constraint,
Wherein, (a2) in step, the mean temperature difference Δ T of heat storage section in geothermal well
iadopt following method to calculate:
According to the temperature data of the heat storage section that this flow order test observation is obtained, calculate test and stablize the average temperature of after heat storage section, and 3. obtain corresponding to thermal yield E according to formula
ithe mean temperature difference Δ T of heat storage section
i,
ΔT
i＝ΔT
ri＝T
0-T
ri ③；
In formula, T
0---the original temperature before heat storage is unminded; T
ri---the average temperature of after heat storage section is stablized in the test of i flow order.
Or (a2) in step, in geothermal well, the mean temperature difference of heat storage section is stored up the original temperature T before unminding by heat
0open flow port flow temperature T after stable with the test of i flow order
idifference represent.
Further, utilize and be located at the interior original temperature T obtaining before heat storage is unminded that observes for the observation instrument of thermometric of well before open flow test
0.
Test method provided by the invention also comprises: the regularity of distribution of the observation data obtaining according to second step, analyze the main contributions position (well section) that heat is stored up, and relatively well feature, checks the underground heat geological conditions that well feature reflects.
Provided by the inventionly comprise for the test observation system of carrying out high-temperature geothermal well yield test: pressure tester in temperature measuring equipment and well in exporting the open flow port flow control module that is connected and earth's surface temperature measuring equipment, earth's surface pressure tester and well with geothermal well.
Further, in well, temperature measuring equipment comprises temperature acquisition equipment and is connected with temperature acquisition equipment and is deep into the temperature pick up in geothermal well; In well, pressure tester comprises pressure acquisition equipment and is connected with pressure acquisition equipment and is deep into the pressure sensor in geothermal well.
The present invention proposes the test method that middle high-temperature geothermal well yield is measured, action and operating procedure: base area hot well feature, determine scheme and the test observation content of multistage constant flow open flow test, carry out the installation of test observation system, carry out test observation, each flow order is tested to the temperature of the earth's surface open flow port obtaining, pressure, the temperature of heat storage section in flow and well, the observation data of pressure real-time change is carried out analyzing and processing, draw respectively in well, outer temperature-time curve, pressure time histories, rate-time relationship curve, and then draw heat in geothermal well output and well and store up the balanced relation curve of the section temperature difference, evaluate the boundary value of output under the interior hot heat accumulation power equilibrium condition of this underground heat individual well well, set up Mathematical Modeling, after observation data is arranged, import model and carry out analytical calculation, to evaluate the well yield that can realize under hot heat accumulation power equilibrium condition in well.
This method is conceived to the limited supply of natural resource, and imbody geothermal well can obtain the limited supply of geothermal energy resources amount, determines the rational yield of individual well border, can be used as the design considerations of building the geothermal energy engineering of preparing the energy.As the impact of not considering that periphery exploitation is disturbed, the individual well yield on this basis has sustainability.
Brief description of the drawings
Fig. 1 is the flow chart of a kind of detailed description of the invention of the test method of middle high-temperature geothermal well yield mensuration provided by the invention;
Fig. 2 is the schematic diagram of a kind of embodiment of the test observation system for carrying out high-temperature geothermal well yield test;
Fig. 3 is according to heat storage section mean temperature difference Δ T in the underground heat well yield E that under stable state in the inventive method utilization test, observation data is drawn and well
rbalanced relation curve;
Fig. 4 example the casing programme of geothermal well of one embodiment of the invention;
Fig. 5 example the brill effect curve map of geothermal well drilling process of one embodiment of the invention;
Fig. 6 example the temperature logs of geothermal well of one embodiment of the invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Before test method provided by the invention is described in detail in detail, first describe a kind of for carrying out the test observation system of high-temperature geothermal well yield test.
As shown in Figure 2, provided by the inventionly comprise in open flow port flow control module and earth's surface temperature measuring equipment, earth's surface pressure tester, well pressure tester in temperature measuring equipment and well for carrying out the test observation system of high-temperature geothermal well yield test.
Open flow port flow control module is connected with blow-out release device.Blow-out release device comprises the manifold 2-1 that is connected to geothermal well 1 and exports, the blooie pipe 2-5 being connected with manifold 2-1 and the steam trap 10 being connected with blooie pipe 2-5.Open flow port flow control module comprises the control valve 2-2 with fine setting and lock function being located on manifold 2-1, and is located on manifold 2-1 and valve 2-3, the 2-4 of the upstream and downstream of the junction of blooie pipe 2-5.Each order open flow port flow can obtain through primary Calculation by exporting with blooie pipe 2-5 pressure sensor 7 readings that are connected, then by steam trap 10, water, steam, incondensable gas is measured simultaneously, further obtains the accurate data of flow.
Earth's surface temperature measuring equipment comprises the temperature pick up 8 being connected with the outlet of blooie pipe 2-5, for observing ground spout temperature.
Earth's surface pressure tester comprise the pressure sensor 7 (for observing ground spout pressure) being connected with the outlet of blooie pipe 2-5 and be connected with the entrance point of manifold 2-1 pressure sensor 9 (for observation well mouth pressure).
In well, temperature measuring equipment comprises temperature acquisition equipment 3 and is connected with temperature acquisition equipment 3 and is deep into the temperature pick up 6 (for measuring the temperature at different depth place in geothermal well) in geothermal well 1.
In well, pressure tester comprises pressure acquisition equipment 4 and is connected with pressure acquisition equipment 4 and is deep into the pressure sensor 5 (for measuring the pressure at different depth place in geothermal well) in geothermal well 1.
Describe below in conjunction with Fig. 2 the test method that provided by the present invention middle high-temperature geothermal well yield is as shown in Figure 1 measured in detail, mainly comprise the following steps:
The first step, base area hot well feature, sets the testing program of measuring for the well yield of quantitative assessment high-temperature geothermal.
Before setting concrete testing program, first must understand in detail on well natural conditions of living in and underground heat geological conditions basis, according to the geological record of geothermal well drilling process, probing are edited and recorded and the analysis of simple and easy hydrology geological observation and geophysical log data, in conjunction with open flow preliminary examination data, complete acquisition geothermal well feature.
The particular content of setting testing program can comprise:
(a) carry out open flow test with the form of multistage constant flow.Multistage time constant flow refers to: set different flows, the test of different flow is carried out according to the direction order of flow increasing or decreasing, and the number of times of increasing or decreasing is order, and the content of observation is identical.
(b) base area hot well feature, determines the mount scheme of the outer observation utensil for measurement of discharge of the inside and outside observation instrument for thermometric, pressure measurement of well and well.Test can be optimized adjustment according to actual measurement situation after carrying out.
(c) position distribution and the data area of the flow scale that hot well feature in base area reflects and temperature, pressure, division definite flow order and the direction order of carrying out test by flow order.
(d) base area hot well feature, determine the observation content of test, observation content comprises the temperature and pressure of the interior heat storage of flow, temperature and pressure and the well of earth's surface open flow port fluid (steam state and liquid state) section, the mark of whether stablizing is the temperature of heat storage in open flow port fluid and well, determines that the standard of whether stablizing is the stable of each flow order temperature and can continues certain hour.
For example, geothermal well feature is as follows:
Heat storage type is the structure heat storage of happiness mountain phase, and lithology is granite-quartz monzonite; Casing programme is shown in Fig. 4, and the brill effect curve of geothermal well drilling process is shown in Fig. 5, and the temperature logs of geothermal well is shown in Fig. 6.In conjunction with Fig. 5 and Fig. 6 and geological record can preliminary judgement well in heat storage fragment position.
Well depth: 1000m;
Three gauge structures:
340mm/0-60m,
245mm/0-400m, d216mm/400-1000m;
Open-Hole Section position 400-1000m;
Heat storage fragment position: 400-1000m;
In geothermal well drilling process, conventionally can carry out open flow preliminary examination.In the present embodiment, open flow preliminary examination related data is:
Preliminary examination flow: 200T/h;
Preliminary examination temperature: 170 DEG C;
Preliminary examination pressure: 3kg/cm
2.
According to above geothermal well feature, set testing program:
(a) set and be divided into 3 flow order: 160T/h, 100T/h, 50T/h by preliminary examination flow;
(b) for the purpose of safety, can draft the fitting depth of observation instrument in this well is 960m;
(c) set test direction: counter-test, the order from large flow to low discharge is carried out test.
Second step, carries out multistage test and observation by testing program, obtains observation data, and described observation data comprises testing carries out well corresponding to overall process inside and outside temperature, pressure data;
(a) carry out respectively installation, the debugging of observation instrument (comprise in earth's surface temperature measuring equipment, earth's surface pressure tester, well in temperature measuring equipment and well in pressure tester pertinent instruments) and open flow port flow control module according to testing program.
In a preferred embodiment, in well, temperature measuring equipment can adopt distributed fiber temperature measuring device, to realize the real-time continuous thermometric of heat storage section.In well, pressure tester can adopt multipoint pressure measure device.The optical cable of distributed fiber temperature measuring device is the temperature pick up 6 of Fig. 2.The multiple spot pressure sensor of multipoint pressure measure device is the pressure sensor 5 in Fig. 2.
(b) measure the original temperature T before heat storage is unminded
0.
(c) according to the direction order of setting, utilize control valve 2-2 to control the order of open flow port flow, from big to small, carry out open flow test, gather and record the observation data of two observation series in the outer earth's surface open flow port of geothermal well and geothermal well, observation data comprises the temperature and pressure data of test overall process open flow port fluid and the temperature and pressure data of the interior heat storage of geothermal well section.
In the present invention, the regularity of distribution of the observation data that can obtain according to second step, analyzes the main contributions position (well section) that heat is stored up, relatively well feature, check the underground heat geological conditions that well feature reflects, this has embodied the extension meaning that this method has.
The 3rd step, the observation data obtaining according to second step, analyzes the middle high-temperature geothermal well yield E under the interior hot heat accumulation power equilibrium condition of well in multistage test
imean temperature difference Δ T with heat storage section in geothermal well
irelation, calculate and try to achieve in individual well well output boundary value E under hot heat accumulation power equilibrium condition
0.
Concrete grammar comprises:
Before analytical calculation, the observation data in observation data and the geothermal well of earth's surface open flow port is analyzed, draw respectively the inside and outside temperature-time curve of well, pressure time histories, rate-time relationship curve.
Then, carry out modeling, calculate the boundary value of trying to achieve output under the interior hot heat accumulation power equilibrium condition of well.Concrete methods of realizing comprises:
(a) test to each flow order:
(a1) utilize the observation data of ground open flow port observation series, the data under analytical test stable state, according to James Boucherie process, adopt following formula 1. to calculate the output E that this flow order is corresponding
i:
Formula 1. in, i represents flow order, d represents blooie pipe internal diameter, cm; P
cirepresent the port pressure recording after i flow order open flow is stablized, bar;
(a2), according to the temperature data of observation, calculate the mean temperature difference Δ T of heat storage section in this flow order geothermal well
i;
(b) test according to each order the geothermal well output E obtaining
imean temperature difference Δ T with heat storage section in well
i, draw E-Δ T equalizer curve, from Fig. 3, on E-Δ T equalizer curve, there is the flex point that E is zero to the first derivative of Δ T, the tangent line at this flex point place is parallel to Δ T axle, and this puts corresponding E
0be worth, be the boundary value of output under the interior hot heat accumulation power equilibrium condition of individual well well, as the impact of not considering that periphery exploitation is disturbed, this geothermal well exploitation heat can not be greater than E
0.The functional form of the formula that E-Δ T equalizer curve can be expressed as shown in 2., solves coefficient A, B (for example adopting one-variable linear regression equation solution).This functional form has been expressed at E
0e-Δ T relation under constraint,
For example, in the first step, according to open flow preliminary examination flow, test is divided into 3 flow orders, formula 1.-3. in i=1,2,3.
In addition, (a2) in step, in each flow order, the mean temperature difference Δ T of heat storage section in well
ican adopt following method to calculate:
According to the temperature data of the heat storage section that this flow order test observation is obtained, calculate this flow order test and stablize the average temperature of after heat storage section, and 3. obtain under this flow order corresponding to output E according to formula
ithe mean temperature difference Δ T of heat storage section
i:
ΔT
i＝ΔT
ri＝T
0-T
ri ③；
In formula, T
0---the original temperature before heat storage is unminded; T
ri---the average temperature of after heat storage section is stablized in the test of i flow order.
When in well, measurement mechanism can not normally use, (a2) in step, in geothermal well, the mean temperature difference of hot storage section is unminded front original temperature T with heat storage
0open flow port flow temperature T after stable with the test of i flow order
idifference represent.Can draw equally E-Δ T equalizer curve, but result of calculation imperfection, precision also can reduce.
Above-described embodiment just illustrates of the present invention, and the present invention also can implement with other ad hoc fashion or other particular form, and does not depart from main idea of the present invention or substantive characteristics.Therefore, the embodiment of description from the viewpoint of any all should be considered as illustrative but not determinate.Scope of the present invention should illustrate by the claim of adding, and any and the intention of claim and the variation of scope equivalence also should be within the scope of the present invention.
Claims (11)
1. the test method that in, high-temperature geothermal well yield is measured, mainly comprises the following steps:
The first step, base area hot well feature, sets the testing program for the well yield of quantitative assessment high-temperature geothermal;
Second step, carries out multistage test and observation by testing program, obtains observation data, and described observation data comprises testing carries out well corresponding to overall process inside and outside temperature, pressure data;
The 3rd step, the observation data obtaining according to second step, analyzes in the test of each order in well the relation of output and heat storage section mean temperature difference under hot heat accumulation power equilibrium condition, calculates and tries to achieve the output boundary value E under hot heat accumulation power equilibrium condition in individual well well
0.
2. test method according to claim 1, is characterized in that, the concrete grammar of the first step comprises:
(a) base area hot well feature, the way of realization of determining testing program is multistage constant flow open flow test;
(b) base area hot well feature, determines the mount scheme of the inside and outside observation instrument for thermometric, pressure measurement of well;
(c) scope of hot well feature in base area reflects flow scale, temperature, pressure, the direction order of dividing the flow order of multistage open flow test and carrying out open flow test by order;
(d) requirement of base area hot well feature, determines the observation content of testing, and described observation content comprises the temperature and pressure of the interior heat storage of flow, temperature and pressure and the well of earth's surface open flow port fluid (steam state and liquid state) section.
3. test method according to claim 2, is characterized in that, in second step, carries out theing contents are as follows of test and observation by testing program:
(a) carry out respectively installation, the debugging of observation instrument according to testing program;
(b) measure the original temperature T before heat storage is unminded
0;
(c) according to the test direction order of setting, control the order of open flow port flow, carry out open flow test, and in the observation process of each flow order, gather and record the observation data of two test observation series in ground open flow port and geothermal well.
4. test method according to claim 3, it is characterized in that, in the 3rd step, first the observation data in observation data and the geothermal well of each order test earth's surface open flow port is analyzed, draws respectively the inside and outside temperature-time curve of well, pressure time histories and rate-time relationship curve.
5. test method according to claim 4, is characterized in that, the concrete methods of realizing of the 3rd step comprises:
(a) for the open flow test of each flow order:
(a1) utilize the observation data of ground open flow port test observation series, the data under analytical test stable state, according to James Boucherie process, adopt following formula 1. to calculate the output E that this flow order is corresponding
i:
Formula 1. in, i represents flow order, d represents blooie pipe internal diameter, cm; P
cirepresent the port pressure recording after i flow order open flow is stablized, bar;
(a2), according to the temperature data of observation, calculate the mean temperature difference Δ T of heat storage section in this flow order geothermal well
i;
(b) each flow order is tested to the geothermal well output E obtaining
imean temperature difference Δ T with heat storage section in geothermal well
idraw E-Δ T equalizer curve, have the flex point that E is zero to Δ T first derivative on E-Δ T equalizer curve, the tangent line at this flex point place is parallel to Δ T axle, and this puts corresponding E
0be worth, be the boundary value of output under the interior hot heat accumulation power equilibrium condition of individual well well, as the impact of not considering that periphery exploitation is disturbed, this geothermal well exploitation heat can not be greater than E
0; E-Δ T equalizer curve is expressed as to the functional form of formula shown in 2., solves coefficient A, B, this functional form has been expressed at E
0e-Δ T relation under constraint,
6. test method according to claim 5, is characterized in that, (a2) in step, and the mean temperature difference Δ T of heat storage section in geothermal well
iadopt following method to calculate:
According to the temperature data of the heat storage section that this flow order test observation is obtained, calculate test and stablize the average temperature of after heat storage section, and 3. obtain corresponding to thermal yield E according to formula
ithe mean temperature difference Δ T of heat storage section
i:
ΔT
i＝ΔT
ri＝T
0-T
ri ③；
In formula, T
0---the original temperature before heat storage is unminded; T
ri---the average temperature of after heat storage section is stablized in the test of i flow order.
7. test method according to claim 5, is characterized in that, (a2) in step, in geothermal well, the mean temperature difference of heat storage section is stored up the original temperature T before unminding by heat
0open flow port flow temperature T after stable with the test of i flow order
idifference represent.
8. according to the test method described in claim 6 or 7, it is characterized in that, utilize in well and before open flow test, observe for the observation instrument of thermometric the original temperature T obtaining before heat storage is unminded
0.
9. test method according to claim 1, it is characterized in that, described test method also comprises, the regularity of distribution of the observation data obtaining according to second step, analyze the main contributions position (well section) of heat storage, relatively well feature, checks the underground heat geological conditions that well feature reflects.
10. for carrying out the test observation system of high-temperature geothermal well yield test, described test observation system comprises:
Pressure tester in temperature measuring equipment and well in exporting the open flow port flow control module that is connected and earth's surface temperature measuring equipment, earth's surface pressure tester and well with geothermal well.
11. test observation systems according to claim 10, is characterized in that, in well, temperature measuring equipment comprises temperature acquisition equipment and is connected with temperature acquisition equipment and is deep into the temperature pick up in geothermal well; In well, pressure tester comprises pressure acquisition equipment and is connected with pressure acquisition equipment and is deep into the pressure sensor in geothermal well.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288464A (en) * | 2016-08-05 | 2017-01-04 | 姜再新 | The method for building up of middle high-temperature geothermal heat exchange output system and middle high-temperature geothermal heat exchange output system |
| CN112343573A (en) * | 2019-08-07 | 2021-02-09 | 中国石油天然气股份有限公司 | Method for predicting yield of condensate gas well |
| CN112832750A (en) * | 2021-03-27 | 2021-05-25 | 河北地质大学 | Temperature measuring device convenient to adapt to geothermal wells of different shapes |
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| CN112832750B (en) * | 2021-03-27 | 2023-02-28 | 河北地质大学 | Temperature measuring device convenient to adapt to geothermal wells of different shapes |
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