CN106707365A - Method for monitoring geothermal reservoir temperature and fracture distribution and device thereof - Google Patents
Method for monitoring geothermal reservoir temperature and fracture distribution and device thereof Download PDFInfo
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- CN106707365A CN106707365A CN201611108483.2A CN201611108483A CN106707365A CN 106707365 A CN106707365 A CN 106707365A CN 201611108483 A CN201611108483 A CN 201611108483A CN 106707365 A CN106707365 A CN 106707365A
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Abstract
The invention discloses a method for monitoring geothermal reservoir temperature and fracture distribution and a device thereof. According to the method, the temperature distribution of a geothermal reservoir can be obtained by performing one time of measurement through a nanometer tracer, the returned curve can be used for determining time of reaction of a threshold nanometer tracer, then the threshold temperature position of the geothermal reservoir is reversely determined through time, finally the temperature distribution of the geothermal reservoir is determined by combining the response curve of the threshold nanometer tracer and a non-nano tracer, and finally the fracture distribution of the geothermal reservoir is determined according to the number of the threshold nanometer tracer in at least two production wells so that real monitoring of the temperature distribution and the fracture distribution of the geothermal reservoir can be realized, and repeated measurement of the temperature and fracture distribution situation of the geothermal reservoir can also be realized.
Description
Technical field
It is more particularly to a kind of to monitor geothermal reservoir temperature and split the present embodiments relate to geothermal reservoir development technique field
The method and apparatus for stitching distribution.
Background technology
As the traditional energies such as non-renewable oil, coal are increasingly in short supply, with wind energy, solar energy, underground heat etc. as representative
Green regenerative energy sources status become increasingly conspicuous, wherein, underground heat with its cleaning, widely distributed, heat reservori it is huge, be considered as 21 generation
The most potential energy resources of discipline.Often lack enough permeability/porositys due to hot dry rock, it is necessary to by artificial fracturing
The connection set up between water injection well and producing well, while in order to set up continuable enhanced geothermal system, it is to avoid heat breaks through existing
As, it is necessary to while consider the connective and reservoir fracture-matrix heat exchange area between water injection well and producing well, therefore temperature and crack
The monitoring of distribution and analytical technology, are to evaluate reservoir reconstruction effect, it is ensured that continue the key technology of high efficiency extraction geothermal energy.
In prior art, the method for temperature and fractured zones for monitoring geothermal reservoir mainly includes using microseism skill
The far field monitoring method of art and the near field monitoring method using radioactive tracer log technology.
Rock interior is because cutting during being mainly by detecting fracture extension using the far field monitoring method of micro-seismic technology
Acoustic emission signal that is bad and producing is cut through, fracture extension process and fracture parameters in Study In Reservoir are come with this.However, record is micro-
Seismic signal and the crack supported by proppant are unrelated (if microseism signal is probably by the crack institute without proppant
Cause, it is also possible to by other non-waterpower connected regions rock discharge stress when it is caused), and difference produce seismic wave meeting
The final signal for interacting and disturbing receiver to receive, so simultaneously inaccurate using the far field monitoring method of micro-seismic technology.
Far field monitoring method using micro-seismic technology can only be implemented in fracturing process, it is impossible to duplicate measurements after being pressed, it is impossible to really
Determine distribution of the proppant in crack, namely not can determine that effective fracture parameter.
It is to add radioactive tracer in fracturing process using the near field monitoring method of radioactive tracer log technology
Enter in fracturing fluid, spectrum gamma rays well logging is carried out after pressure break, fracture parameters are explained with this.This method exist half-life period,
The problems such as radioactivity, and traveling process of the radioactive material with fracturing fluid in crack is likely to occur layering or segregation phenomenon,
The final result for obtaining can not reflect actual fissured structure.Using the near field monitoring method of radioactive tracer log technology
Needs are measured immediately after pressure break, do not possess the ability of real-time monitoring, and be only capable of obtaining the crack in the range of nearly pit shaft
Parameter.
The content of the invention
In order to solve problem of the prior art, a kind of monitoring geothermal reservoir temperature and crack point are the embodiment of the invention provides
The method and apparatus of cloth, realize the true monitoring of the Temperature Distribution and fractue spacing of geothermal reservoir, while underground heat can also be realized
The repeated measurement of reservoir temperature and distribution situations of cracks.The technical scheme is as follows：
In a first aspect, the embodiment of the present invention provides a kind of method for monitoring geothermal reservoir temperature and fractue spacing, the side
Method includes：
Reacted using nano SiO 2 particle and nitrogen, generation threshold value nanometer tracer；
The maximum dilution volume of the geothermal reservoir is obtained, and use is calculated according to the maximum dilution volume of the geothermal reservoir
In the quantity of the nanometer tracer delivered to the geothermal reservoir；
To threshold value nanometer tracer and non-threshold nanometer tracer are injected in water injection well simultaneously, wherein, the threshold value
Nanometer tracer and non-threshold nanometer tracer have identical migration rule and course of reaction；
After first preset time threshold, detection is sampled to the water injection well, and according to testing result is drawn
The response curve of threshold value nanometer tracer and the non-nano tracer；
According to threshold value nanometer tracer and the response curve of the non-nano tracer, the geothermal reservoir is determined
Threshold temperature position, and obtain the Temperature Distribution of the geothermal reservoir；
After second preset time threshold, detection is sampled at least two producing wells around the water injection well, and
The quantity of the nanometer tracer of threshold value described at least two producing well is determined according to testing result；
The quantity of threshold value nanometer tracer determines the geothermal reservoir crack according at least two producing well
Distribution.
Optionally, the use nano SiO 2 particle and nitrogen react, generation threshold value nanometer tracer, including：
Nano SiO 2 particle reacts at high temperature with nitrogen, and the silica that generation surface is attached with an amino is received
Rice grain；
The surface is attached with into a nano SiO 2 particle for amino to be replaced with the amino, threshold value is generated
Nanometer tracer grain.
Optionally, the maximum dilution volume for obtaining the geothermal reservoir, and according to the maximum dilute of the geothermal reservoir
Release volume and calculate quantity for the nanometer tracer delivered to the geothermal reservoir, including：
According to formula VP=π r2hφErThe maximum dilution volume of the geothermal reservoir is calculated, wherein, VPIt is the geothermal reservoirs
The maximum dilution volume of layer；R is the distance between water injection well and producing well；φ is the porosity between water injection well and producing well；ErFor
Percent continuity between water injection well and producing well；
According to formula A >=μM DLVPThe quantity for the nanometer tracer delivered to the geothermal reservoir is calculated, wherein, A
It is the quantity for the nanometer tracer delivered to the geothermal reservoir；μ is assurance coefficient；MDL is the lowest detection pole of instrument
Limit.
Optionally, it is described according to the threshold value nanometer tracer and the non-nano tracer response curve, determine institute
The threshold temperature position of geothermal reservoir is stated, and obtains the Temperature Distribution of the geothermal reservoir, including：
The temperature reduction curve of producing well is calculated according to conduction model, and curve is reduced according to the temperature and determine that arrival is faced
Time needed for boundary's temperature；
Time according to needed for reaching critical-temperature, determine the threshold temperature position of the geothermal reservoir；
According to the threshold value nanometer tracer and the non-nano tracer response curve, and the geothermal reservoir threshold
Value temperature position, obtains the Temperature Distribution of the geothermal reservoir.
On the other hand, the embodiment of the present invention also provides a kind of device for monitoring geothermal reservoir temperature and fractue spacing, described
Device includes：
First processing module, for being reacted using nano SiO 2 particle and nitrogen, generation threshold value nanometer tracer；
First acquisition module, the maximum dilution volume for obtaining the geothermal reservoir, and according to the geothermal reservoir
Maximum dilution volume calculates the quantity for the nanometer tracer delivered to the geothermal reservoir；
Second processing module, for injecting threshold value nanometer tracer and non-threshold nanometer spike in water injection well simultaneously
Agent, wherein, the threshold value nanometer tracer and non-threshold nanometer tracer have identical migration rule and course of reaction；
3rd processing module, for after the first preset time threshold, being sampled detection, and root to the water injection well
The response curve of the threshold value nanometer tracer and the non-nano tracer is drawn according to testing result；
First determining module, for the response curve according to threshold value nanometer tracer and the non-nano tracer,
Determine the threshold temperature position of the geothermal reservoir, and obtain the Temperature Distribution of the geothermal reservoir；
Fourth processing module, for after the second preset time threshold, at least two lifes around the water injection well
Produce well and be sampled detection, and the number of the nanometer tracer of threshold value described at least two producing well is determined according to testing result
Amount；
Second determining module, the quantity for the threshold value nanometer tracer according at least two producing well determines
The geothermal reservoir fractue spacing.
Optionally, the first processing module specifically for：
Nano SiO 2 particle reacts at high temperature with nitrogen, and the silica that generation surface is attached with an amino is received
Rice grain；
The surface is attached with into a nano SiO 2 particle for amino to be replaced with the amino, threshold value is generated
Nanometer tracer grain.
Optionally, first acquisition module specifically for：
According to formula VP=π r2hφErThe maximum dilution volume of the geothermal reservoir is calculated, wherein, VPIt is the geothermal reservoirs
The maximum dilution volume of layer；R is the distance between water injection well and producing well；φ is the porosity between water injection well and producing well；ErFor
Percent continuity between water injection well and producing well；
According to formula A >=μM DLVPThe quantity for the nanometer tracer delivered to the geothermal reservoir is calculated, wherein, A
It is the quantity for the nanometer tracer delivered to the geothermal reservoir；μ is assurance coefficient；MDL is the lowest detection pole of instrument
Limit.
Optionally, first determining module specifically for：
The temperature reduction curve of producing well is calculated according to conduction model, and curve is reduced according to the temperature and determine that arrival is faced
Time needed for boundary's temperature；
Time according to needed for reaching critical-temperature, determine the threshold temperature position of the geothermal reservoir；
According to the threshold value nanometer tracer and the non-nano tracer response curve, and the geothermal reservoir threshold
Value temperature position, obtains the Temperature Distribution of the geothermal reservoir.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Method provided in an embodiment of the present invention, is reacted using nano SiO 2 particle and nitrogen first, is made threshold value and is received
Rice tracer, then the maximum dilution volume according to geothermal reservoir calculate for the nanometer tracer delivered to the geothermal reservoir
Quantity, so in water injection well simultaneously inject threshold value nanometer tracer and non-threshold nanometer tracer, wherein, threshold value nanometer spike
Agent and non-threshold nanometer tracer have identical migration rule and course of reaction；After first preset time threshold, to water filling
Well is sampled detection, and the response curve of threshold value nanometer tracer and non-nano tracer is drawn according to testing result, then
According to threshold value nanometer tracer and the response curve of non-nano tracer, the threshold temperature position of geothermal reservoir is determined, and obtain
The Temperature Distribution of geothermal reservoir；After second preset time threshold, at least two producing wells around water injection well are sampled
Detection, and the quantity of threshold value nanometer tracer at least two producing wells is determined according to testing result, then according at least two
The quantity of threshold value nanometer tracer determines geothermal reservoir fractue spacing in producing well.Method provided in an embodiment of the present invention, passes through
Nanometer tracer carries out one-shot measurement can just obtain the Temperature Distribution of geothermal reservoir, and it returns to curve can be used for threshold value
The time that nanometer tracer reacts, then determine the threshold temperature position of geothermal reservoir in turn by the time again, finally
With reference to threshold value nanometer tracer and the response curve of non-nano tracer, the Temperature Distribution of geothermal reservoir is determined, finally according to extremely
The quantity of threshold value nanometer tracer determines geothermal reservoir fractue spacing in few two producing wells, realizes the temperature point of geothermal reservoir
The true monitoring of cloth and fractue spacing, while the repeated measurement of geothermal reservoir temperature and distribution situations of cracks can also be realized.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is that a kind of flow of method for monitoring geothermal reservoir temperature and fractue spacing provided in an embodiment of the present invention is illustrated
Figure；
Fig. 2 is a kind of structural representation of device for monitoring geothermal reservoir temperature and fractue spacing provided in an embodiment of the present invention
Figure.
Fig. 3 is the response curve schematic diagram of threshold value nanometer tracer provided in an embodiment of the present invention and non-threshold nanometer tracer；
Fig. 4 is seepage velocity radar schematic diagram provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of method for monitoring geothermal reservoir temperature and fractue spacing provided in an embodiment of the present invention, referring to Fig. 1,
The method can include following several steps：
Step 101：Reacted using nano SiO 2 particle and nitrogen, generation threshold value nanometer tracer.
Specifically, will be reacted using nano SiO 2 particle and nitrogen first, generation surface is attached with amino
Nano SiO 2 particle, will silica dioxide granule reacted at high temperature with nitrogen, and then in silica nanometer
One amino of surface affix of grain；Then surface is attached with into a nano SiO 2 particle for amino to be put with amino
Change, generation threshold value nanometer tracer grain.
Step 102：The maximum dilution volume of the geothermal reservoir is obtained, and according to the maximum dilution body of the geothermal reservoir
Product calculates the quantity for the nanometer tracer delivered to the geothermal reservoir.
Specifically, can be according to formula VP=π r2hφErThe maximum dilution volume of geothermal reservoir is calculated, wherein, VPFor this
The maximum dilution volume of geothermal reservoir；R is the distance between water injection well and producing well；φ is the hole between water injection well and producing well
Degree；ErIt is the percent continuity between water injection well and producing well；After obtaining the maximum dilution volume of geothermal reservoir, according to formula A
≥μMDLVPThe quantity for the nanometer tracer delivered to the geothermal reservoir is calculated, wherein, A is for being thrown to the geothermal reservoir
The quantity of the nanometer tracer put；μ is assurance coefficient；MDL is the lowest detection limit of instrument.
Step 103：To threshold value nanometer tracer and non-threshold nanometer tracer are injected in water injection well simultaneously, wherein,
The threshold value nanometer tracer and non-threshold nanometer tracer have identical migration rule and course of reaction.
Specifically, threshold value nanometer tracer and non-threshold nanometer tracer are mixed into injection water by high pressure pump group, so
Threshold value nanometer tracer and the injection water of non-threshold nanometer tracer will be added to be injected in the water injection well by high pressure pump group afterwards, i.e.,
To threshold value nanometer tracer and non-threshold nanometer tracer, and threshold value nanometer tracer and non-threshold are injected in the water injection well simultaneously
Nanometer tracer has identical migration rule and course of reaction.
It should be noted that the embodiment of the present invention is for addition threshold value nanometer tracer in water injection well and non-threshold nanometer
Tracer specific method and process, the embodiment of the present invention are not specifically limited, example, the embodiment of the present invention can be by height
Press pump group and waterflood-transmission line are to adding threshold value nanometer tracer and non-threshold nanometer tracer simultaneously in water injection well.
Step 104：After first preset time threshold, detection is sampled to the water injection well, and according to testing result
Draw the response curve of the threshold value nanometer tracer and non-threshold nanometer tracer.
When to threshold value nanometer tracer and non-threshold nanometer tracer is added in water injection well, by the first preset time threshold
Reaction after, carry out sample detecting to water injection well and producing well, and threshold value nanometer tracer and non-is drawn according to testing result
The response curve of threshold value nanometer tracer.
It should be noted that the size of the first preset time threshold can have user voluntarily to set, it is also possible to write from memory by terminal
Recognize setting, the embodiment of the present invention is not specifically limited to this, example, those skilled in the art can select according to actual needs
The size of the first preset time threshold.
Example, after to threshold value nanometer tracer and non-threshold nanometer tracer is added in water injection well, to water filling
Threshold value nanometer tracer and the non-threshold nanometer tracer same day is added to calculate in well, after one week, respectively in daily morning 9:
00 and afternoon 9:00 pair of water injection well and producing well are sampled, i.e., received to addition threshold value nanometer tracer and non-threshold in water injection well
Rice tracer after a week, in daily morning 9:00 pair of water injection well and producing well are sampled once, then again in daily afternoon
9:00 pair of water injection well and producing well sampling are once.Then, when to addition threshold value nanometer tracer in water injection well and non-threshold nanometer
After tracer two weeks, respectively in daily morning 9:00 pair of producing well and water injection well sampling are once.Added when in water injection well
Before threshold value nanometer tracer and non-threshold nanometer tracer terminate for two weeks to test, daily all to producing well and water injection well in morning
Upper 9:00 sampling is once.
It should be noted that to before adding threshold value nanometer tracer and non-threshold nanometer tracer in water injection well, needing
First to carry out sample detecting respectively to water injection well and producing well, obtain the original background sample of water injection well and producing well.
Obtaining the sampled data of water injection well and producing well addition threshold value nanometer tracer and non-threshold nanometer tracer
Afterwards, the response curve of threshold value nanometer tracer and non-threshold nanometer tracer is drawn respectively according to the sampled data for being obtained.
Example, threshold value nanometer tracer and non-threshold nanometer tracer are respectively drawn according to the sampled data for being obtained
Response curve is as shown in figure 3, certainly, be merely illustrative of, the response curve for not representing the embodiment of the present invention is confined to herein
This.
Step 105：According to threshold value nanometer tracer and the response curve of non-threshold nanometer tracer, institute is determined
The threshold temperature position of geothermal reservoir is stated, and obtains the Temperature Distribution of the geothermal reservoir.
Specifically, the temperature reduction curve of producing well is calculated according to conduction model first, and it is true to reduce curve according to temperature
Surely the time needed for reaching critical-temperature, then the time according to needed for reaching critical-temperature, the threshold value temperature of geothermal reservoir is determined
Degree position, finally according to threshold value nanometer tracer and non-nano tracer response curve, and geothermal reservoir threshold temperature
Position, obtains the Temperature Distribution of the geothermal reservoir.
It should be noted that tracer is a kind of measurement geothermal reservoir temperature data, the effective ways of pre- calorimetric breakthrough, can
For determining that effective reservoir temperature is average temperature value, and oil reservoir bulk temperature distribution.And nano material is right due to its
The high susceptibility of temperature, can carry more information than popular response solute tracer, and sealing reactant can be made upright
The nanometer tracer just reacted when threshold temperature is reached is the preferred material of the Temperature Distribution monitoring for carrying out underground heat storage.
Threshold value nanometer tracer can realize more fine geothermal reservoir Temperature Distribution.
Threshold value nanometer reaction tracer can just obtain reservoir temperature distribution by once testing, and it returns to curve and can use
To determine the time that reactant reacts, then determine to reach the oil reservoir position of threshold temperature in turn by the time.Threshold value is anti-
Tracer is answered to react tracer with non-threshold while being tested, before two difference of return curve of gained can just be used for determining heat
Edge (hot sharp side), and then the Temperature Distribution of geothermal reservoir can be just disclosed with reference to this two group information.
In order to realize the detection to geothermal reservoir temperature, present invention utilization nano material, will to the high susceptibility of temperature
Threshold value nanometer tracer test is combined with the response curve of non-threshold nanometer tracer test, and numerical inversion is most terminated
Really.Using threshold value nanometer tracer to the real-time monitoring of Temperature Distribution in enhanced geothermal reservoir recovery process, storage is can determine
The hydraulic characteristic of layer, optimization injection-production well arrangement, prediction producing well heat break through, so as to keep the extraction geothermal energy of continuous and effective.
Step 106：After second preset time threshold, at least two producing wells around the water injection well are sampled
Detection, and the quantity of the nanometer tracer of threshold value described at least two producing well is determined according to testing result.
When to threshold value nanometer tracer and non-threshold nanometer tracer is added in water injection well, by the second preset time threshold
Reaction after, carry out sample detecting to water injection well and producing well, and threshold at least two producing wells is determined according to testing result
It is worth the quantity of nanometer tracer.
It should be noted that the size of the second preset time threshold can have user voluntarily to set, it is also possible to write from memory by terminal
Recognize setting, the embodiment of the present invention is not specifically limited to this, example, those skilled in the art can select according to actual needs
The size of the second preset time threshold.
Secondly it should be noted that being based on fissuted medium solute transport model, it is assumed that with stationary flow in water injection well at a glance
Amount injection threshold value nanometer tracer and non-threshold nanometer tracer, nigh producing well at a glance are exploited with the flow of stabilization, and
Assuming that injection water flows along a passage (such as fissure zone) from injection well to producing well, and flowing in the channel is one-dimensional
's.Ignore the effect of molecule diffusion, it is assumed that a certain amount of threshold value nanometer tracer and non-threshold nanometer tracer are disposably thrown
In people's injection well, a portion is migrated along passage to producing well, it is considered to the conservation of mass of tracer, it can be deduced that crack goes out
The expression formula of mouthful tracer concentration isWherein, C is that crack outlet tracer is dense
Degree, A is the sectional area of crack passage,It is the porosity of crack passage, MrIt is the tracer dose of person who lives in exile's crack passage, L is injection
The length of crack passage between well and producing well, D is dispersion coefficient, and u is the movement velocity for injecting water in crack, and t is the time,
ρ is the density of recharge water.
The fissure channel of water injection well and producing well is connected if n bars, then the tracer concentration of producing well is：Wherein,Di=αiui、In formula：Q is the water injection rate for flowing to crack passage the unit interval, and Q is stream of the producing well during tracer test
Amount, αLIt is the vertical dispersivity in crack, qinIt is injection rate of the injection well during Tracer Test；M is tracer total input；
MiIt is the tracer dose for flowing through passage i.
Step 107：The quantity of threshold value nanometer tracer determines the underground heat according at least two producing well
Reservoir Fracture is distributed.
Specifically, can be by computer program TRINV come to the threshold value nanometer tracer in the producing well for detecting
Quantity is fitted analysis, then obtains the seepage velocity radar map of the tracer after nanometer tracer injection water injection well, its
In, seepage velocity of the nanometer tracer between water injection well and producing well is directly proportional to the size and distribution situation in crack.
It should be noted that the embodiment of the present invention does not do specific limit for the quantity of the producing well near the injection well of selection
It is fixed, it is preferred that the distribution situations of cracks of the quantity of the producing well near the injection well of the selection geothermal reservoirs for analyzing more
Plus it is true.
Example, the seepage velocity radar map of the embodiment of the present invention as shown in figure 4, with reference to shown in Fig. 4, dash area in figure
Size represent the size of seepage velocity of the nanometer tracer between water injection well and producing well, wherein, can be seen with reference to Fig. 4
Go out, the seepage velocity near the local nanometer tracer of water injection well is bigger, and can be seen that between water injection well and producing well
Crack it is bigger, seepage velocity of the nanometer tracer between water injection well and producing well is bigger.
Method provided in an embodiment of the present invention, is reacted using nano SiO 2 particle and nitrogen first, is made threshold value and is received
Rice tracer, then the maximum dilution volume according to geothermal reservoir calculate for the nanometer tracer delivered to the geothermal reservoir
Quantity, so in water injection well simultaneously inject threshold value nanometer tracer and non-threshold nanometer tracer, wherein, threshold value nanometer spike
Agent and non-threshold nanometer tracer have identical migration rule and course of reaction；After first preset time threshold, to water filling
Well is sampled detection, and the response curve of threshold value nanometer tracer and non-nano tracer is drawn according to testing result, then
According to threshold value nanometer tracer and the response curve of non-nano tracer, the threshold temperature position of geothermal reservoir is determined, and obtain
The Temperature Distribution of geothermal reservoir；After second preset time threshold, at least two producing wells around water injection well are sampled
Detection, and the quantity of threshold value nanometer tracer at least two producing wells is determined according to testing result, then according at least two
The quantity of threshold value nanometer tracer determines geothermal reservoir fractue spacing in producing well.Method provided in an embodiment of the present invention, passes through
Nanometer tracer carries out one-shot measurement can just obtain the Temperature Distribution of geothermal reservoir, and it returns to curve can be used for threshold value
The time that nanometer tracer reacts, then determine the threshold temperature position of geothermal reservoir in turn by the time again, finally
With reference to threshold value nanometer tracer and the response curve of non-nano tracer, the Temperature Distribution of geothermal reservoir is determined, finally according to extremely
The quantity of threshold value nanometer tracer determines geothermal reservoir fractue spacing in few two producing wells, realizes the temperature point of geothermal reservoir
The true monitoring of cloth and fractue spacing, while the repeated measurement of geothermal reservoir temperature and distribution situations of cracks can also be realized.
Fig. 2 is the structural representation of the device of monitoring geothermal reservoir temperature provided in an embodiment of the present invention and fractue spacing,
Referring to Fig. 2, the device can include：
First processing module 210, for being reacted using nano SiO 2 particle and nitrogen, generation threshold value nanometer spike
Agent；
First acquisition module 220, the maximum dilution volume for obtaining the geothermal reservoir, and according to the geothermal reservoir
Maximum dilution volume calculate quantity for the nanometer tracer delivered to the geothermal reservoir；
Second processing module 230, for injecting threshold value nanometer tracer and non-threshold nanometer in water injection well simultaneously
Tracer, wherein, the threshold value nanometer tracer and non-threshold nanometer tracer have identical migration rule and reaction
Process；
3rd processing module 240, for after the first preset time threshold, detection being sampled to the water injection well,
And the response curve of the threshold value nanometer tracer and the non-nano tracer is drawn according to testing result；
First determining module 250, it is bent for the response according to threshold value nanometer tracer and the non-nano tracer
Line, determines the threshold temperature position of the geothermal reservoir, and obtains the Temperature Distribution of the geothermal reservoir；
Fourth processing module 260, for after the second preset time threshold, at least two around the water injection well
Producing well is sampled detection, and determines the nanometer tracer of threshold value described at least two producing well according to testing result
Quantity；
Second determining module 270, for the quantity of the threshold value nanometer tracer according at least two producing well
Determine the geothermal reservoir fractue spacing.
Optionally, first processing module 210 specifically for：
Nano SiO 2 particle reacts at high temperature with nitrogen, and the silica that generation surface is attached with an amino is received
Rice grain；
The surface is attached with into a nano SiO 2 particle for amino to be replaced with the amino, threshold value is generated
Nanometer tracer grain.
Optionally, the first acquisition module 220 specifically for：
According to formula VP=π r2hφErThe maximum dilution volume of the geothermal reservoir is calculated, wherein, VPIt is the geothermal reservoirs
The maximum dilution volume of layer；R is the distance between water injection well and producing well；φ is the porosity between water injection well and producing well；ErFor
Percent continuity between water injection well and producing well；
According to formula A >=μM DLVPThe quantity for the nanometer tracer delivered to the geothermal reservoir is calculated, wherein, A
It is the quantity for the nanometer tracer delivered to the geothermal reservoir；μ is assurance coefficient；MDL is the lowest detection pole of instrument
Limit.
Optionally, the first determining module 250 specifically for：
The temperature reduction curve of producing well is calculated according to conduction model, and curve is reduced according to the temperature and determine that arrival is faced
Time needed for boundary's temperature；
Time according to needed for reaching critical-temperature, determine the threshold temperature position of the geothermal reservoir；
According to the threshold value nanometer tracer and the non-nano tracer response curve, and the geothermal reservoir threshold
Value temperature position, obtains the Temperature Distribution of the geothermal reservoir.
It should be noted that：A kind of monitoring geothermal reservoir temperature and the device of fractue spacing that above-described embodiment is provided are being entered
During the detection of row monitoring geothermal reservoir temperature and fractue spacing, only carried out with the division of above-mentioned each functional module for example, real
In the application of border, can be completed by different functional module as needed and by above-mentioned functions distribution, will equipment internal structure
Different functional modules are divided into, to complete all or part of function described above.In addition, the prison that above-described embodiment is provided
The device of geodetic heat reservori temperature and fractue spacing belongs to same with the embodiment of the method for monitoring geothermal reservoir temperature and fractue spacing
One design, it implements process and refers to embodiment of the method, repeats no more here.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
One of ordinary skill in the art will appreciate that realizing that all or part of step of above-described embodiment can be by hardware
To complete, it is also possible to instruct the hardware of correlation to complete by program, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of method for monitoring geothermal reservoir temperature and fractue spacing, it is characterised in that methods described includes：
Reacted using nano SiO 2 particle and nitrogen, generation threshold value nanometer tracer；
Obtain the maximum dilution volume of the geothermal reservoir, and according to the maximum dilution volume of the geothermal reservoir calculate for
The quantity of the nanometer tracer that the geothermal reservoir is delivered；
To threshold value nanometer tracer and non-threshold nanometer tracer are injected in water injection well simultaneously, wherein, the threshold value nanometer
Tracer and non-threshold nanometer tracer have identical migration rule and course of reaction；
After first preset time threshold, detection is sampled to the water injection well, and the threshold value is drawn according to testing result
The response curve of nanometer tracer and the non-nano tracer；
According to threshold value nanometer tracer and the response curve of non-threshold nanometer tracer, the geothermal reservoir is determined
Threshold temperature position, and obtain the Temperature Distribution of the geothermal reservoir；
After second preset time threshold, at least two producing wells around the water injection well are sampled with detection, and according to
Testing result determines the quantity of the nanometer tracer of threshold value described at least two producing well；
The quantity of threshold value nanometer tracer determines the geothermal reservoir fractue spacing according at least two producing well.
2. method according to claim 1, it is characterised in that the use nano SiO 2 particle and nitrogen react,
Generation threshold value nanometer tracer, including：
Nano SiO 2 particle reacts at high temperature with nitrogen, and generation surface is attached with a silica nanometer for amino
Grain；
The surface is attached with into a nano SiO 2 particle for amino to be replaced with the amino, generation threshold value nanometer
Tracer grain.
3. method according to claim 1, it is characterised in that the maximum dilution volume of the acquisition geothermal reservoir,
And the quantity for the nanometer tracer delivered to the geothermal reservoir is calculated according to the maximum dilution volume of the geothermal reservoir,
Including：
According to formula VP=π r2hφErThe maximum dilution volume of the geothermal reservoir is calculated, wherein, VPIt is the geothermal reservoir
Maximum dilution volume；R is the distance between water injection well and producing well；φ is the porosity between water injection well and producing well；ErIt is water filling
Percent continuity between well and producing well；
According to formula A >=μM DLVPCalculate the quantity for the nanometer tracer delivered to the geothermal reservoir, wherein, A be for
The quantity of the nanometer tracer delivered to the geothermal reservoir；μ is assurance coefficient；MDL is the lowest detection limit of instrument.
4. method according to claim 1, it is characterised in that described according to threshold value nanometer tracer and described non-to receive
The response curve of rice tracer, determines the threshold temperature position of the geothermal reservoir, and obtains the temperature point of the geothermal reservoir
Cloth, including：
The temperature reduction curve of producing well is calculated according to conduction model, and curve is reduced according to the temperature and determine to reach stagnation temperature
Time needed for degree；
Time according to needed for reaching critical-temperature, determine the threshold temperature position of the geothermal reservoir；
According to the threshold value nanometer tracer and the non-nano tracer response curve, and the geothermal reservoir threshold value temperature
Degree position, obtains the Temperature Distribution of the geothermal reservoir.
5. a kind of device for monitoring geothermal reservoir temperature and fractue spacing, it is characterised in that described device includes：
First processing module, for being reacted using nano SiO 2 particle and nitrogen, generation threshold value nanometer tracer；
First acquisition module, the maximum dilution volume for obtaining the geothermal reservoir, and according to the maximum of the geothermal reservoir
Dilution volume calculates the quantity for the nanometer tracer delivered to the geothermal reservoir；
Second processing module, for threshold value nanometer tracer and non-threshold nanometer tracer are injected in water injection well simultaneously,
Wherein, the threshold value nanometer tracer and non-threshold nanometer tracer have identical migration rule and course of reaction；
3rd processing module, for after the first preset time threshold, detection being sampled to the water injection well, and according to inspection
Survey the response curve that result draws the threshold value nanometer tracer and the non-nano tracer；
First determining module, for the response curve according to threshold value nanometer tracer and the non-nano tracer, it is determined that
The threshold temperature position of the geothermal reservoir, and obtain the Temperature Distribution of the geothermal reservoir；
Fourth processing module, for after the second preset time threshold, at least two producing wells around the water injection well
Detection is sampled, and the quantity of the nanometer tracer of threshold value described at least two producing well is determined according to testing result；
Second determining module, for described in the quantity determination of threshold value nanometer tracer according at least two producing well
Geothermal reservoir fractue spacing.
6. device according to claim 5, it is characterised in that the first processing module specifically for：
Nano SiO 2 particle reacts at high temperature with nitrogen, and generation surface is attached with a silica nanometer for amino
Grain；
The surface is attached with into a nano SiO 2 particle for amino to be replaced with the amino, generation threshold value nanometer
Tracer grain.
7. device according to claim 5, it is characterised in that first acquisition module specifically for：
According to formula VP=π r2hφErThe maximum dilution volume of the geothermal reservoir is calculated, wherein, VPIt is the geothermal reservoir
Maximum dilution volume；R is the distance between water injection well and producing well；φ is the porosity between water injection well and producing well；ErIt is water filling
Percent continuity between well and producing well；
According to formula A >=μM DLVPCalculate the quantity for the nanometer tracer delivered to the geothermal reservoir, wherein, A be for
The quantity of the nanometer tracer delivered to the geothermal reservoir；μ is assurance coefficient；MDL is the lowest detection limit of instrument.
8. method according to claim 1, it is characterised in that first determining module specifically for：
The temperature reduction curve of producing well is calculated according to conduction model, and curve is reduced according to the temperature and determine to reach stagnation temperature
Time needed for degree；
Time according to needed for reaching critical-temperature, determine the threshold temperature position of the geothermal reservoir；
According to the threshold value nanometer tracer and the non-nano tracer response curve, and the geothermal reservoir threshold value temperature
Degree position, obtains the Temperature Distribution of the geothermal reservoir.
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