CN108930534A - With the bearing calibration and device for boring the influence of nuclear magnetic resonance formation temperature - Google Patents
With the bearing calibration and device for boring the influence of nuclear magnetic resonance formation temperature Download PDFInfo
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- CN108930534A CN108930534A CN201810910994.9A CN201810910994A CN108930534A CN 108930534 A CN108930534 A CN 108930534A CN 201810910994 A CN201810910994 A CN 201810910994A CN 108930534 A CN108930534 A CN 108930534A
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- Prior art keywords
- temperature
- rock
- drill jumbo
- wellbore
- container
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
- G01N24/081—Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
Abstract
The present invention provide it is a kind of with bore nuclear magnetic resonance formation temperature influence bearing calibration and device, the device include: constant temperature and pressure case, rock container and shaft drill jumbo, the rock container is located in the constant temperature and pressure case；The rock container is the container for the N layer prosthetic graft that implantation copies down-hole formation country rock to make, and at least one first temperature sensor is provided in every layer of prosthetic graft of the rock container；At least one second temperature sensor is provided on the length direction of the drilling rod of the shaft drill jumbo.Therefore, provided by the invention to can be measured that the formation temperature of rock stratum in the radial direction with the bearing calibration and device of boring the influence of nuclear magnetic resonance formation temperature.
Description
Technical field
The present invention relates to oil drilling technology more particularly to a kind of bearing calibrations influenced with nuclear magnetic resonance formation temperature is bored
With device.
Background technique
In oil field exploration and development process, since formation temperature has important work to the generation, migration and aggregation etc. of oil gas
With, and to the physical property of oil, gas and water and rock, there is also very important influences.Therefore, research formation temperature can solve
Certainly Petroleum Geology Theory and oil-gas exploration and development work in many critical problems.
The prior art is usually to pass through temperature logging (also known as hot well logging) curve to know subsurface formations temperature, specifically: it bores
Logger is installed in well equipment, when drilling equipment pierces stratum, the downhole temperature that logger can measure, according to well logging
The temperature that apparatus measures arrive T=K (BHT-15)+15 according to the following formula, obtains the actual temperature on stratum, wherein BHT indicates to survey
The temperature that well apparatus measures arrive, T indicate stratum actual temperature, K is correction coefficient, wherein K with from different places and change and with
Geothermal gradient has close correlation.
But by the above method by the downhole temperature that logger measures be the temperature of near wellbore, however due to
Drilling fluid can be injected into wellbore in drilling process, and the temperature of drilling fluid can lower the formation temperature of wellbore, thus shadow
The downhole temperature of logger measurement is rung, and then the actual temperature accuracy on the stratum obtained is caused to reduce.
Summary of the invention
The present invention provide it is a kind of with bore nuclear magnetic resonance formation temperature influence bearing calibration and device, for solving existing skill
It is the temperature of wellbore by the downhole temperature that logger measures in art, and stratum can not be deep into and radially measure stratum
The technical issues of temperature.
The first aspect of the invention is to provide a kind of means for correcting influenced with nuclear magnetic resonance formation temperature is bored, the device
It include: constant temperature and pressure case, rock container and shaft drill jumbo, the rock container is located in the constant temperature and pressure case；The rock holds
Device is the container for the N layer prosthetic graft that implantation copies down-hole formation country rock to make, and every layer of artificial rock of the rock container
At least one first temperature sensor is provided in stone；Be provided on the length direction of the drilling rod of the shaft drill jumbo at least one
Two temperature sensors.
The shaft drill jumbo is used for dynamic towards brill in the rock container since the top of the rock container.
First temperature sensor, for detecting the temperature of the prosthetic graft during shaft drill jumbo bores dynamic
Degree.
The second temperature sensor, for detecting the shaft drill jumbo described during the shaft drill jumbo bores dynamic
The temperature for the wellbore bored out in rock container.
Wherein, the temperature that the temperature and the second temperature sensor that first temperature sensor detects detect
For correcting the actual temperature on stratum.
Optionally, the rock container is located at the center of the constant temperature and pressure case, and the rock container and constant temperature
It is not in contact with each other between constant pressure case.
In a kind of possible embodiment, court the shaft drill jumbo is used for above the center of the rock container
It is bored in the rock container dynamic.
In a kind of possible embodiment, the constant temperature and pressure case includes temperature compensation means, the temperature-compensating dress
It sets for carrying out temperature correction when the temperature of the constant temperature and pressure case differs the first preset value with preset temperature.
In a kind of possible embodiment, the constant temperature and pressure case includes pressure compensator, the pressure compensation dress
It sets for carrying out pressure correction when the pressure of the constant temperature and pressure case differs the second preset value with preset pressure.
In a kind of possible embodiment, every layer of prosthetic graft has the lithology object of the respective layer rock of down-hole formation
Property.
In a kind of possible embodiment, the constant temperature and pressure case is cylinder, and the rock container is cylinder.
In a kind of possible embodiment, the shaft drill jumbo includes drill bit and drilling rod, wherein the drilling rod is hollow
Cylindrical bar.
The sectional area for the wellbore that the drill bit drills out is greater than the sectional area of the drilling rod.
During the shaft drill jumbo bores dynamic, drilling fluid is injected out of the drilling rod the hollow cylindrical bar, and
It flows back in gap between the borehole wall and the drilling rod of the wellbore drilled out by the drill bit.
In a kind of possible embodiment, every layer of prosthetic graft of the rock container be provided in the radial direction to
Few first temperature sensor.
The second aspect of the present invention is to provide a kind of bearing calibration influenced with nuclear magnetic resonance formation temperature is bored, is applied to such as
First aspect is of the present invention in the means for correcting for boring the influence of nuclear magnetic resonance formation temperature.
This method comprises:
For obtaining the first temperature that first temperature sensor detects during the shaft drill jumbo bores dynamic,
And the second temperature that the second temperature sensor detects；
Using first temperature as the analog detection temperature on stratum, analog detection of the second temperature as the wellbore drilled out
Temperature determines the analog detection temperature on stratum when shaft drill jumbo pierces stratum according to first temperature and the second temperature
Corresponding relationship between the analog detection temperature of wellbore.
In a kind of possible embodiment, at actual well drilled stratum, according to the corresponding relationship and described drill out
Wellbore measured temperature, determine the actual temperature on stratum.
The bearing calibration provided by the invention influenced with brill nuclear magnetic resonance formation temperature and device, by prosthetic graft layer
Temperature sensor is set on different radial depths, can not only obtain the analog detection temperature of wellbore in simulation drilling process,
It can also be to the analog detection temperature on the stratum on the lithosphere difference radial depth of corresponding borehole depth position, in this way, can be with
Obtain the corresponding relationship of the analog detection testing temperature of wellbore and the analog detection temperature on stratum.Due to the temperature inside lithosphere by
Drilling fluid temperature influence is small, and in practical logging, the depth of the wellbore obtained when according to practical logging, temperature information pass through well
The relationship of the temperature and the temperature on the lithosphere difference radial depth of corresponding borehole depth position of eye, can obtain practical logging
When stratum temperature information, which can represent the true temperature information on stratum completely to a certain extent, can be applied to count
Related formation parameter is calculated, the accuracy of well logging formation parameter calculation can be improved to a certain extent.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the full simulation drilling rig of one embodiment of the invention；
Fig. 2 is the cross-sectional view of the first temperature sensor distribution in the prosthetic graft stratum of one embodiment of the invention；
Fig. 3 is the structural schematic diagram of the constant temperature and pressure case of one embodiment of the invention；
Fig. 4 is the rock container schematic diagram of one embodiment of the invention；
Fig. 5 is the drilling rod of one embodiment of the invention and the sectional view of wellbore；
Fig. 6 is provided by the invention with the flow diagram for boring the bearing calibration that nuclear magnetic resonance formation temperature influences.
Symbol description:
1: constant temperature and pressure case；
2: rock container；
3: shaft drill jumbo；
4: the first temperature sensors；
5: drilling rod；
6: the gap between drilling rod and the borehole wall of wellbore；
7: wellbore.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The concept and its explanation used herein arrived:
The analog detection temperature on stratum: when simulation drilling well, on the prosthetic graft layer that is measured using the device in the application
Temperature.
The analog detection temperature of wellbore: when simulation drilling well, the temperature in wellbore that is measured using the device in the application.
The measured temperature of wellbore: in practical logging, temperature sensor measurement on logger to wellbore in
Temperature.
The actual temperature on stratum: in practical logging, the temperature on the stratum that the temperature sensor on logger is unable to measure
Degree.
The prior art is usually to pass through temperature logging (also known as hot well logging) curve to know subsurface formations temperature, specifically: it bores
Logger is installed in well equipment, when drilling equipment pierces stratum, the downhole temperature that logger can measure, according to well logging
The temperature that apparatus measures arrive T=K (BHT-15)+15 according to the following formula, obtains the actual temperature on stratum, wherein BHT indicates to survey
The temperature that well apparatus measures arrive, T indicate stratum actual temperature, K is correction coefficient, wherein K with from different places and change and with
Geothermal gradient has close correlation.
But by the above method by the downhole temperature that logger measures be the temperature of near wellbore, however due to
Drilling fluid can be injected into wellbore in drilling process, and the temperature of drilling fluid can lower the temperature of wellbore, to influence to survey
The downhole temperature that well apparatus measures arrive, and then the actual temperature accuracy on the stratum obtained is caused to reduce.
In view of the above problem, the present invention provides a kind of means for correctings influenced with nuclear magnetic resonance formation temperature is bored, lead to
It crosses on the radial depth of every layer of prosthetic graft and temperature sensor is set, and it is radial to obtain the prosthetic graft in simulation drilling process
Temperature information in depth.
Technical solution of the present invention is described in detail below by specific embodiment.These are specific real below
Applying example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 1 is the structural schematic diagram of the full simulation drilling rig of one embodiment of the invention.As shown in Figure 1, the present invention mentions
The means for correcting influenced with nuclear magnetic resonance formation temperature is bored supplied includes: constant temperature and pressure case 1, rock container 2 and shaft drill jumbo 3.Its
In, rock container 2 is located in constant temperature and pressure case 1.
It simulates in drilling process, it is consistent with actual formation environment to guarantee that environment locating for rock container 2 is needed, so that it is guaranteed that
The accuracy of the temperature data of acquisition, so the temperature and pressure set in constant temperature and pressure case 1 is true locating for down-hole formation country rock
Actual temperature pressure in layer on the spot.
It, can be in reality in order to guarantee that the temperature data obtained by simulator can more accurately reflect truth
It is studied in border drilling well and well logging from the physical property of the collected a large amount of rock in stratum, artificial produces with underground
The consistent N layers of prosthetic graft of physical properties of rock of layer country rock, and will be in N layers of prosthetic graft implantation rock container 2.Meanwhile every layer of people
At least one 4 (not shown in figure 1) of the first temperature sensor is provided on lithogenesis stone.
Shaft drill jumbo 3 includes drill bit and drilling rod two parts.Shaft drill jumbo 3 is used for since the top of rock container 2 towards the rock
It bores and moves in stone container 2, and the drill bit on shaft drill jumbo 3 can be rotated arbitrarily, to change the drilling direction of shaft drill jumbo 3.Wherein,
In making artificial rock, need to reserve the drilling well path that shaft drill jumbo 3 may pass through to shaft drill jumbo 3, artificial core is in drilling well
The first temperature sensor 4 is not placed on the drilling well path that device 3 may pass through.Meanwhile it being set on the length direction of the drilling rod of shaft drill jumbo 3
It is equipped at least one second temperature sensor, and the pressure-measuring instrument of corresponding each second temperature sensor.Due to artificial
In rock different depth of stratum corresponds to different strata pressures, so available pressure characterizes depth of stratum, to utilize pressure
Force measuring instrument device obtains the depth information to prosthetic graft locating for temperature of second temperature sensor measurement.
First temperature sensor 4, for detecting the temperature information of prosthetic graft during shaft drill jumbo 3 bores dynamic；Second
Temperature sensor, for detecting the temperature for the wellbore that shaft drill jumbo 3 bores out in rock container during shaft drill jumbo 3 bores dynamic.
Wherein, the temperature that the temperature and second temperature sensor that the first temperature sensor 4 detects detect is used for school
The actual temperature on positive stratum.
Optionally, provided by the invention with boring in the means for correcting that nuclear magnetic resonance formation temperature influences, in order to guarantee rock
The temperature and pressure of prosthetic graft in stone container 2 is stablized, and when rock container 2 is fixed on constant temperature and pressure 1 inside of case, makes constant temperature
It is not in contact with each other between constant pressure case 1 and rock container 2.
In some embodiments of the invention, towards institute shaft drill jumbo is used for above the center of the rock container 2
It states to bore in rock container 2 and move.
In some embodiments of the invention, in order to guarantee that entire 3 drilling process of shaft drill jumbo can be simulated more accurately very
Real drilling process, needs to keep locating for the true down-hole formation country rock corresponding with prosthetic graft of the temperature in constant temperature and pressure case 1
Temperature (i.e. preset temperature) it is identical, so being provided with temperature compensation means in constant temperature and pressure case 1.Temperature compensation means is used for
The temperature of constant temperature and pressure case 1 carries out temperature correction when differing the first preset value with preset temperature, i.e., when the temperature in constant temperature and pressure case 1
When degree is higher or lower than the first preset value of preset temperature, temperature compensation means adjusts the temperature in constant temperature and pressure case 1, makes to adjust
The difference of the temperature and preset temperature in constant temperature and pressure case 1 afterwards is in the first preset value.Wherein, the application is to the first preset value
Size with no restrictions, such as the first preset value can be 0.1 degree Celsius, 0.2 degree Celsius, specific size can be according to actual needs
Selection.
Meanwhile meet the pressure in constant temperature and pressure case 1 locating for true down-hole formation country rock corresponding with prosthetic graft
The identical requirement of pressure (i.e. preset pressure), so being provided with pressure compensator in constant temperature and pressure case 1.Pressure compensator is used
In carrying out temperature correction when the pressure of constant temperature and pressure case 1 differs the first preset value with preset pressure, i.e., when in constant temperature and pressure case 1
Pressure be higher or lower than the second preset value of preset pressure when, pressure compensator adjust constant temperature and pressure case 1 in pressure, make
The difference of pressure and preset pressure in constant temperature and pressure case 1 adjusted is in the second preset value.Wherein, the application is pre- to second
If the size of value is with no restrictions, such as the second preset value can be 10pa, 15pa, and specific size can select according to actual needs.
In some embodiment of the invention, every layer of prosthetic graft has the lithology object of the respective layer rock of down-hole formation
Property.Since prosthetic graft is formed according to the physical property manual simulation on true stratum, the formation rock of different depth in true stratum
Physical property it is different, so by every layer of prosthetic graft according to respective layer rock physical properties of rock make, prosthetic graft can be made
Closer to the physical properties of rock of respective layer rock in true stratum, the data obtained in finally simulation drilling well can be made more acurrate.Example
Such as: true stratum is followed successively by lithosphere a, lithosphere b, lithosphere c, lithosphere d etc., then rock container 2 by upper direction directed downwardly
By upper direction directed downwardly, it is special to be disposed with the prosthetic graft of the rock behavio(u)r with lithosphere a, the rock with lithosphere b
The prosthetic graft of property, the prosthetic graft of rock behavio(u)r with lithosphere c, rock behavio(u)r with lithosphere d prosthetic graft
Deng.
Fig. 2 is the cross-sectional view of the first temperature sensor distribution in the prosthetic graft stratum of one embodiment of the invention.
Provided by the invention with boring in one embodiment of means for correcting that nuclear magnetic resonance formation temperature influences, as shown in Fig. 2, rock container
Every layer of prosthetic graft be provided at least one first temperature sensor 4 in the radial direction.Preferably as shaft drill jumbo is boring
During well, due to the inflow of drilling fluid, for same layer prosthetic graft, it will lead on the prosthetic graft of wellbore
The temperature change in region is more obvious than the variation in other regions, so the first temperature of installation on the radial depth of same layer prosthetic graft
Spend sensor 4 when, it then follows using wellbore as origin, to it is radially extending when, the packing density of the first temperature sensor 4 is in every layer of people
Principle gradually sparse on lithogenesis stone radial depth.
The structural schematic diagram of the constant temperature and pressure case of Fig. 3 one embodiment of the invention.As shown in figure 3, with boring nuclear magnetic resonance
In the means for correcting that layer temperature influences, the shape of 1 sum of constant temperature and pressure case is cylinder, may be, for example, cuboid, cylinder.
Fig. 4 is the rock container schematic diagram of one embodiment of the invention.In the correction influenced with nuclear magnetic resonance formation temperature is bored
In device, the shape of rock container 2 is cylinder, may be, for example, cuboid, cylinder.As shown in figure 4, for rock container 2,
On every layer in order to guarantee the prosthetic graft in rock container 2 on the identical radial depth in prosthetic graft center extremely
For the temperature difference that few first temperature sensor measurement arrives within the scope of allowable error, rock container 2 is preferably cylinder.
Shaft drill jumbo 3 is to form according to real well equipment scaled down processing and fabricating, and shaft drill jumbo 3 includes drill bit and brill
Bar.Wherein, the drill bit of shaft drill jumbo 3 is for the rock in broken formation, formation wellbore.The drilling rod of shaft drill jumbo 3 is hollow cylinder
Bar, for injecting drilling fluid into wellbore in drilling process.
Fig. 5 is the drilling rod of one embodiment of the invention and the sectional view of wellbore.It is bored as shown in figure 5, the sectional area of drilling rod is less than
The sectional area for the wellbore 7 that the drill bit of well device 3 drills out, so, the borehole wall of the wellbore 7 that the drilling rod of shaft drill jumbo 3 and shaft drill jumbo 3 drill out it
Between there are gaps 6.During shaft drill jumbo 3 bores dynamic, drilling fluid is injected out of the drilling rod hollow circuit cylinder bar 5, and is passed through
It flows back in gap 6 between the borehole wall of wellbore 7 and the drilling rod.
Specifically, the drill bit of shaft drill jumbo 3 needs to smash the rock in stratum, institute during the shaft drill jumbo 3 bores dynamic
Can generate rock debris, these rock debris can hinder the drill bit of shaft drill jumbo 3 after follow-up hole, so 3 drilling process of shaft drill jumbo
In, it needs to inject drilling fluid and takes rock debris out of.Wherein, drilling fluid is injected out of the drilling rod of shaft drill jumbo 3 hollow circuit cylinder bar 5
The drill bit for reaching shaft drill jumbo 3 can contain a large amount of rock debris among wellbore 7 in drilling fluid.Due in stratum compared with
The pressure of depths is greater than the strata pressure of top herein, so, the drilling fluid in wellbore 7 is under the action of pressure difference along shaft drill jumbo
Flow out wellbore in gap 6 between the borehole wall for the wellbore 7 that 3 drilling rods and shaft drill jumbo 3 drill out, and rock debris is flowed out also with drilling fluid,
Achieve the purpose that clear up wellbore.Wherein, drilling fluid can be for clear water, drilling fluid, free clay phase flushing liquor, emulsion etc., specifically
It selects according to actual needs.
After drilling fluid enters wellbore 7, since the temperature of drilling fluid is lower than the temperature of prosthetic graft, so, drilling fluid
Temperature can reduce the temperature of 7 surrounding formation of wellbore, so obtaining temperature by second temperature sensor measurement can not be really anti-
Reflect formation temperature.Meanwhile although drilling fluid also radially can be invaded gradually inside prosthetic graft, to prosthetic graft radial direction
On temperature have an impact.But drilling fluid will not be invaded largely inside prosthetic graft, thus the temperature inside prosthetic graft
Influenced by drilling fluid temperature it is smaller, so the first temperature sensor measurement for radially placing of prosthetic graft to temperature more connect
Nearly actual formation temperature.
Using the means for correcting influenced in the present invention with nuclear magnetic resonance formation temperature is bored, not only available prosthetic graft
Temperature information on radial depth can also obtain the dynamic temperature information on prosthetic graft radial depth, thus for oil field
Exploration and exploitation provide more accurate information.
Below based on the above-mentioned means for correcting influenced with nuclear magnetic resonance formation temperature is bored, to provided by the invention with brill nuclear-magnetism
The bearing calibration that resonance formation temperature influences is illustrated.
Fig. 6 is provided by the invention with the flow diagram for boring the bearing calibration that nuclear magnetic resonance formation temperature influences.Such as Fig. 6
It is shown, this method comprises:
S101, during the shaft drill jumbo bores dynamic, obtain the first temperature that first temperature sensor detects,
And the second temperature that the second temperature sensor detects.
Specifically, opening the first temperature in every layer of prosthetic graft in rock container 2 when shaft drill jumbo 3 is started to work
Sensor 4 and the second temperature sensor on 3 drilling rod of shaft drill jumbo.Meanwhile first temperature sensor 4 start to measure it is artificial
Temperature information on rock difference radial depth, and temperature information is transferred to computer；Second temperature sensor starts to measure
Temperature information in wellbore, and be transferred in computer.
In 3 drilling process of shaft drill jumbo, be arranged in the first temperature sensor on each layer of prosthetic graft in real time by the layer not
It is transferred in calculator with the temperature on radial depth.Each second temperature sensor on shaft drill jumbo 3 is arranged in will be locating for it
The temperature of the wellbore of position is transferred in calculator.Meanwhile pressure-measuring instrument detects second temperature sensor institute in the wellbore
The pressure for locating position, is transferred in computer.Computer record shaft drill jumbo 3 reaches the time of every layer of prosthetic graft.
For example, reaching prosthetic graft depth h in shaft drill jumbo 30When place, computer records shaft drill jumbo 3 and reaches h0The time at place,
Reach h0Pressure information is transferred in computer by the device for pressure measurement on the shaft drill jumbo 3 at place.Shaft drill jumbo 3 is located at h0The of place
The two temperature sensor measurements temperature in wellbore at this time, and temperature is transferred in computer.Meanwhile it is corresponding deep on prosthetic graft
Spend h0The temperature on the different radial depths of the first temperature sensor measurement this layer on the prosthetic graft layer at place, and by temperature information
It is transferred in computer.
During shaft drill jumbo 3 continues downward drilling well, the second temperature on the run of steel direction of shaft drill jumbo 3 is passed
Sensor can successively reach h0Place.When one of second temperature sensor reaches h0When place, the pressure of the corresponding second temperature sensor
Power side measuring appratus can detect that the second temperature sensor reaches h0Place, the second temperature sensor measure h in wellbore at this time0Place
Temperature and be transferred in computer.In addition, the intrusion due to drilling fluid to the radial direction of prosthetic graft, leads to prosthetic graft
Temperature on radial depth can also change, and according to the difference of mud filtrate invasion degree, temperature change is also different, utilize every layer
The temperature on 4 real-time measurement prosthetic graft difference radial depth of the first temperature sensor in prosthetic graft, and it is transferred to calculating
In machine.Meanwhile it will record the time of mud filtrate invasion on this layer of prosthetic graft in computer.
Before step S101, further include, first by equipped with prosthetic graft rock container 2 be fixed on set temperature and
In the constant temperature and pressure case 1 of pressure, constant temperature and pressure case 1 is then closed.Rock container 2 is placed in a period of time in constant temperature and pressure case 1, makes
Prosthetic graft internal-external temperature, pressure is consistent, i.e., consistent with true stratum temperature and pressure.Then, on constant temperature and pressure case 1
An aperture is opened, for the entrance of shaft drill jumbo 3.
S102, using first temperature as the analog detection temperature on stratum, analog detection of the second temperature as wellbore
Temperature determines the analog detection temperature on stratum when shaft drill jumbo pierces stratum according to first temperature and the second temperature
Corresponding relationship between the analog detection temperature of wellbore.
Specifically, firstly, every layer of prosthetic graft of the first temperature sensor measurement that computer is collected into above corresponds to not
Corresponded in the wellbore obtained with the first temperature on radial depth, second temperature sensor measurement the second temperature of different depth into
Pedestrian is screening, that is, is deleted in the first temperature and second temperature to the nugatory temperature data of result.Such as it is rigid in shaft drill jumbo 3
When starting to bore, this do not enter into the second temperature sensor in wellbore measurement second temperature, when drilling fluid temperature no longer
Influence the first temperature and the second temperature etc. that wellbore temperatures and prosthetic graft layer radially measure behind greenhouse.
Then, the various data that computer obtains are arranged, according to the artificial rock of borehole depth and the corresponding borehole depth
The radial depth of rock layers is by second temperature and the first temperature collating sort.
Finally, in identical borehole depth and the also phase of locating radial depth on the prosthetic graft layer of the corresponding borehole depth
With in the case where, temperature correction plate is established according to the data that computer obtains, wherein the temperature correction plate is a three-dimensional
Rectangular coordinate system.Wherein, X-axis is the analog detection temperature of wellbore, i.e. second temperature.Y-axis is the analog detection temperature on stratum, i.e.,
First temperature, wherein when having at least two first temperature sensors on the same radial depth on every layer of prosthetic graft, the
One temperature is the average value for the temperature that all first temperature sensor measurements arrive on the radial depth.Z axis indicates the time, works as drilling well
Device 3 reach prosthetic graft certain depth when, drilling fluid has an impact the temperature in the wellbore to the depth, and with when
Between variation, the influence that the temperature in the wellbore to the depth generates is gradually reduced by drilling fluid, that is, X-axis and Z axis indicate well
The curve that the analog detection temperature of eye changes over time.Meanwhile drilling fluid can invade on every layer of prosthetic graft along radial direction
Enter, so the temperature of drilling fluid also will affect the temperature on prosthetic graft layer radial depth, and drilling fluid is in radial directions
The degree of intrusion is different, influences variation degree difference.Meanwhile with the variation of time, drilling fluid is to warm on different radial depths
The influence of degree is gradually reduced, that is, Y-axis and Z axis indicate the curve that the analog detection temperature on stratum changes over time.In this way, just obtaining
Obtained the analog detection temperature of any one corresponding borehole depth and the stratum on radial depth and the analog detection temperature of wellbore
The temperature correction plate of corresponding relationship between degree.Meanwhile passing through the temperature correction plate, it is also possible to obtain any one wellbore
The relationship of the analog detection temperature and time of the wellbore of depth and the analog detection temperature on the stratum on different radial depths with
The relationship of time.
The method of the present embodiment further include: at actual well drilled stratum, according to the actually detected of corresponding relationship and wellbore
Temperature determines the actual temperature on stratum.In actual well drilled, thermometric instruments are unable to measure the temperature to stratum in the radial direction
Degree, can only obtain the measured temperature of wellbore.Again since the temperature of wellbore is influenced by the temperature of drilling fluid, cause to obtain well
The measured temperature of eye differs larger with the actual temperature on stratum, therefore the measured temperature for obtaining wellbore cannot be used to table
Show the actual temperature on stratum.
So the measured temperature of wellbore can be obtained in actual well drilled, in the temperature and temperature correction plate
The analog detection temperature of wellbore is corresponding.So in the case where borehole depth determines, according to the measured temperature of wellbore,
The analog detection temperature on the only one stratum on temperature correction plate on the different radial depths of available correspondence.Due to drilling well
Influence of the temperature of liquid to stratum radially temperature is small, so passing through the analog detection temperature on the stratum obtained on temperature correction plate
Degree can completely represent the actual temperature on stratum to a certain extent.Meanwhile on temperature correction plate, it can also be seen that wellbore
The rule that changes over time of measured temperature, and the rule that change over time of actual temperature of different radial depth overlying stratas
Rule.
According to the actual measurement temperature of wellbore, the stratum of very close stratum actual temperature is obtained by temperature correction plate
Analog detection temperature, the calculating of the parameters such as porosity on stratum is carried out using the detection temperature on stratum, parameter can be improved
Accuracy.Meanwhile the measuring instrument used when drilling well is adjusted according to the detection temperature on stratum, improve the accuracy of well logging.According to
The rule that the analog detection temperature of the wellbore shown on temperature correction plate and the analog detection temperature on stratum change over time respectively
It restrains, available more accurate well logging information, such as the information such as fluid behaviour in oil-water relative permeability, rock, to be
Oil field exploration and exploitation provide more accurate information.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (11)
1. a kind of means for correcting influenced with nuclear magnetic resonance formation temperature is bored characterized by comprising constant temperature and pressure case, rock
Container and shaft drill jumbo, the rock container are located in the constant temperature and pressure case；The rock container is that down-hole formation is copied in implantation
The container of the N layer prosthetic graft of country rock production, and be provided in every layer of prosthetic graft of the rock container at least one the
One temperature sensor；At least one second temperature sensor is provided on the length direction of the drilling rod of the shaft drill jumbo；
The shaft drill jumbo is used for dynamic towards brill in the rock container since the top of the rock container；
First temperature sensor, for detecting the temperature of the prosthetic graft during shaft drill jumbo bores dynamic；
The second temperature sensor, for detecting the shaft drill jumbo in the rock during shaft drill jumbo bores dynamic
The temperature for the wellbore bored out in container；
Wherein, the temperature that the temperature and the second temperature sensor that first temperature sensor detects detect is used for
Correct the actual temperature on stratum.
2. the apparatus according to claim 1, which is characterized in that the rock container is located at the center of the constant temperature and pressure case
The heart, and be not in contact with each other between the rock container and constant temperature and pressure case.
3. device according to claim 1 or 2, which is characterized in that the shaft drill jumbo is used for from the rock container just
Overcentre starts to bore towards in the rock container dynamic.
4. device according to claim 1 or 2, which is characterized in that the constant temperature and pressure case includes temperature compensation means, institute
Temperature compensation means is stated for carrying out temperature school when the temperature of the constant temperature and pressure case differs the first preset value with preset temperature
Just.
5. device according to claim 1 or 2, which is characterized in that the constant temperature and pressure case includes pressure compensator, institute
Pressure compensator is stated for carrying out pressure school when the pressure of the constant temperature and pressure case differs the second preset value with preset pressure
Just.
6. device according to claim 1 or 2, which is characterized in that every layer of prosthetic graft has the correspondence of down-hole formation
The physical properties of rock of layer rock.
7. device according to claim 1 or 2, which is characterized in that the constant temperature and pressure case is cylinder, and the rock holds
Device is cylinder.
8. device according to claim 1 or 2, which is characterized in that the shaft drill jumbo includes drill bit drilling rod, wherein described
Drilling rod is hollow cylindrical bar；
The sectional area for the wellbore that the drill bit drills out is greater than the sectional area of the drilling rod；
During the shaft drill jumbo bores dynamic, drilling fluid is injected out of the drilling rod the hollow cylindrical bar, and is passed through
Gap reflux between the borehole wall for the wellbore that the drill bit drills out and the drilling rod.
9. device according to claim 1 or 2, which is characterized in that the radial direction of every layer of prosthetic graft of the rock container
At least one first temperature sensor is provided on direction.
10. a kind of bearing calibration influenced with nuclear magnetic resonance formation temperature is bored, which is characterized in that be applied to such as claim 1-9
In described in any item means for correctings influenced with brill nuclear magnetic resonance formation temperature；
The described method includes:
For obtaining the first temperature that first temperature sensor detects during the shaft drill jumbo bores dynamic, and
The second temperature that the second temperature sensor detects；
Using first temperature as the analog detection temperature on stratum, analog detection temperature of the second temperature as the wellbore drilled out
Degree determines when shaft drill jumbo pierces stratum according to first temperature and the second temperature, the analog detection temperature on stratum with
Corresponding relationship between the analog detection temperature of wellbore.
11. according to the method described in claim 10, it is characterized by further comprising:
At actual well drilled stratum, according to the corresponding relationship and the measured temperature of the wellbore drilled out, definitely
The actual temperature of layer.
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| CN201810910994.9A CN108930534B (en) | 2018-08-10 | 2018-08-10 | Method and device for correcting temperature influence of nuclear magnetic resonance formation while drilling |
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| CN201810910994.9A CN108930534B (en) | 2018-08-10 | 2018-08-10 | Method and device for correcting temperature influence of nuclear magnetic resonance formation while drilling |
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