CN108873104B - The calibration component of rock core impedance spectroscopy measurement system - Google Patents
The calibration component of rock core impedance spectroscopy measurement system Download PDFInfo
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- CN108873104B CN108873104B CN201810516493.2A CN201810516493A CN108873104B CN 108873104 B CN108873104 B CN 108873104B CN 201810516493 A CN201810516493 A CN 201810516493A CN 108873104 B CN108873104 B CN 108873104B
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Abstract
The embodiment of the invention discloses the calibration components of rock core impedance spectroscopy measurement system, it include: shell with hollow cavity and the parallel component being made of resistance unit and charge storage unit, the resistance unit includes at least one resistance, the charge storage unit includes at least one inductance and/or at least one capacitor, and the parallel component is located in the cavity；The impedance value of the parallel component is consistent with the impedance value of rock core to be measured.The impedance spectrum variation of the parallel component of the present embodiment is consistent with the spectral change of rock core, and the rock core impedance measurement system obtained under rock core impedance measurement system or frequency conversion sweep measurement mode under AC measurment mode can be efficiently and accurately calibrated using the calibration component of the present embodiment.
Description
Technical field
The present embodiments relate to geological exploration technical field more particularly to a kind of schools of rock core impedance spectroscopy measurement system
Quasi- part.
Background technique
Suitable well must be selected within the scope of oil field, to related oil, gas-bearing formation position, drilled through a certain number of rock cores, passed through
Observation, analysis and research, it will be appreciated that the epoch on stratum, lithology, deposition characteristics；Physics, chemical property and the oil-containing of reservoir,
Gas and water situation；Source bed feature and source rock index；Subsurface structure situation (such as tomography, joint, inclination angle)；Various logging methods
Qualitative, quantitative interpretation basic data；Oily in recovery process, gas and water movement and distribution situation and earth formation variation；
Rock core is also estimation petroleum storage for water filling or the various laboratory experiment analyses for improving recovery ratio method and volume increase, well stimulation
Amount, establishment reasonable development scheme, the essential basic data for improving reservoir waterflooding effect and recovery ratio.
The impedance value of rock core generallys use rock core impedance measurement system to measure, and the precision of rock core impedance measurement system is direct
Determine the accuracy of rock core impedance measurements.Therefore, using rock core impedance measurement system measurement rock core impedance value it
Before, it needs to calibrate using precision of the calibration component to rock core impedance measurement system.
Currently used for calibrating the calibration component of rock core impedance measurement system, by cylinder cavity similar with rock core shape
The resistance device that size appropriateness is welded in shell is realized.But rock core is not purely resistive medium, impedance has dispersion phenomenon, i.e.,
The complex resistivity of rock core can change with the variation of frequency, therefore, be surveyed using the rock core impedance that existing calibration component is calibrated
Amount system can not accurately measure the impedance value of non-purely resistive rock core.
Summary of the invention
The embodiment of the present invention provides a kind of calibration component of rock core impedance spectroscopy measurement system, to solve existing calibration component school
Quasi- rock core impedance measurement system, the problem of impedance value of non-purely resistive rock core can not be accurately measured.
The embodiment of the present invention provides a kind of calibration component of rock core impedance spectroscopy measurement system, comprising: with hollow cavity
Shell and the parallel component being made of resistance unit and charge storage unit, the resistance unit includes at least one resistance, described
Charge storage unit includes at least one inductance and/or at least one capacitor, and the parallel component is located in the cavity；
The impedance value of the parallel component is consistent with the impedance value of rock core to be measured.
In a kind of possible implementation of the invention, the resistance unit includes at least one resistance, the storage
Unit includes at least one capacitor, and the resistance unit is connected in parallel with the charge storage unit.
In alternatively possible implementation of the invention, the resistance unit includes at least one resistance, the storage
Electric unit includes at least one inductance, and the resistance unit is connected in parallel with the charge storage unit.
In alternatively possible implementation of the invention, the resistance unit includes at least one resistance, the storage
Electric unit includes at least one inductance and at least one capacitor.
In alternatively possible implementation of the invention, the resistance unit includes first resistor and second resistance,
The charge storage unit includes first capacitor and the second capacitor, first resistor and first capacitor and the second resistance after series connection and
Second capacitor is in parallel.
In alternatively possible implementation of the invention, lid is located at the first conductive cap of the first end of the shell
Body, and lid are located at the second conductive cover of the second end of the shell, first conductive cover and second conductive cover
On be provided with the through-hole being connected to the cavity, the first pin of the parallel component is threaded through in first conductive cover
Through-hole in connect with first conductive cover, the second pin of the parallel component is threaded through in second conductive cover
Through-hole in connect with second conductive cover.
In alternatively possible implementation of the invention, the first end of first conductive cover and the shell,
And second conductive cover is threadedly coupled with the second end of the shell.
In alternatively possible implementation of the invention, the parallel component include 3rd resistor and with the third
The third capacitor of resistor coupled in parallel, determines the impedance Z of the parallel component according to the following formula:
Wherein, the R1 is the resistance value of the 3rd resistor,ρ is the resistivity for being intended to simulation core,A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the rock core to be measured
Porosity, SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the sectional area of the rock core to be measured；
The C1 is the capacitance of the third capacitor,
εrFor the relative dielectric constant of the rock core to be measured, εrm、εrw、εrhSkeleton, water flooding and the hydro carbons of the respectively described rock core to be measured
Relative dielectric constant, ε0For permittivity of vacuum；The ω is angular frequency, and the π of ω=2 f, the f are measurement frequency, the j
For unit imaginary number.
In alternatively possible implementation of the invention, the parallel component includes the 4th resistance and with the described 4th
First inductance of resistor coupled in parallel, determines the impedance Z of the parallel component according to the following formula:
Z=R2+jwL1
Wherein, the R2 is the 4th resistance value,ρ is the resistivity for being intended to simulation core,A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the rock to be measured
The porosity of the heart, SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the rock core to be measured
Sectional area；The L1 is the inductance value of first inductance；The ω is angular frequency, and the π of ω=2 f, the f are measurement frequency,
The j is unit imaginary number.
In alternatively possible implementation of the invention, the resistance unit include the 5th resistance being connected in parallel,
Second inductance and the 5th capacitor, determine the impedance Z of the parallel component according to the following formula:
Wherein, the R3 is the resistance value of the 5th resistance,ρ is the resistivity for being intended to simulation core,A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the rock core to be measured
Porosity, SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the section of the rock core to be measured
Product；The C2 is the capacitance of the 5th capacitor,
εrFor the relative dielectric constant of the rock core to be measured, εrm、εrw、εrhSkeleton, water flooding and the hydro carbons of the respectively described rock core to be measured
Relative dielectric constant, ε0For permittivity of vacuum；The L2 is the inductance value of second inductance；The ω is angular frequency,
The π of ω=2 f, the f are measurement frequency, and the j is unit imaginary number.
The embodiment of the present invention has the beneficial effect that:
It is described by the way that the parallel component that there is the shell of middle cavity and be made of resistance unit and charge storage unit is arranged
Resistance unit includes at least one resistance, and the charge storage unit includes at least one inductance and/or at least one capacitor, it is described simultaneously
Connection component is located in the cavity；The impedance value of the parallel component is consistent with the impedance value of rock core to be measured.The present embodiment and
The impedance spectrum variation for joining component is consistent with the spectral change of rock core, can be efficiently and accurately using the calibration component of the present embodiment
Calibrate the rock core impedance measurement system obtained under rock core impedance measurement system or frequency conversion sweep measurement mode under AC measurment mode.
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 this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the calibration component cross-sectional view of existing rock core impedance measurement system；
Fig. 2 is the structural schematic diagram of the calibration component for the rock core impedance spectroscopy measurement system that the embodiment of the present invention one provides；
Fig. 3 is the actual measurement frequency dispersion rule figure of rock；
A kind of structural schematic diagram of parallel component in the calibration component that Fig. 4 is related to for the present embodiment；
Fig. 5 is the frequency dispersion rule figure of parallel component shown in Fig. 4；
The first structural schematic diagram of parallel component in the calibration component that Fig. 6 is related to for the embodiment of the present invention two；
Second of structural schematic diagram of parallel component in the calibration component that Fig. 7 is related to for the embodiment of the present invention two；
The third structural schematic diagram of parallel component in the calibration component that Fig. 8 is related to for the embodiment of the present invention two；
Fig. 9 is a kind of concrete structure schematic diagram of the third structure of parallel component；
4th kind of structural schematic diagram of parallel component in the calibration component that Figure 10 is related to for the embodiment of the present invention two；
Figure 11 is a kind of concrete structure schematic diagram of the 4th kind of structure of parallel component；
Figure 12 is the structural schematic diagram of the calibration component for the rock core impedance spectroscopy measurement system that the embodiment of the present invention three provides.
Description of symbols:
100: calibration component；
11: shell；
10: parallel component；
110: resistance unit；
120: charge storage unit；
12: the first conductive covers；
13: the second conductive covers；
20: resistance device.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is the calibration component cross-sectional view of existing rock core impedance measurement system, as shown in Figure 1, existing calibration component 100 is wrapped
Shell 11 and resistance device 20 are included, the shell 11 is similar to the shape of rock core to be measured, usually cylinder cavity shell 11, resistance
Device 20 is resistance unit known to resistance, which is welded in shell 11.In checking procedure, rock core impedance measurement
Clip in system accommodates the calibration component 100, and the impedance value of the calibration component 100 is measured using rock core impedance measurement system, and
The impedance value of measurement is compared with the real impedance values of calibration component 100, when the impedance value of measurement and the reality of calibration component 100
When error between impedance value is more than preset range, illustrates the rock core impedance measurement system inaccuracy, need to survey rock core impedance
Amount systematic survey is adjusted, so that the impedance value of calibration component 100 measured by rock core impedance measurement system and calibration component 100
Error between real impedance values is met the requirements.
But the resistance device 20 in existing calibration component 100 can only calibrate the survey of the rock core impedance under DC measurement mode
Amount system, but rock core is not purely resistive medium, when measuring the rock core of non-purely resistive, needs AC measurment mode, especially becomes
Rock core impedance measurement system under frequency sweep measurement mode, at this point, existing calibration component 100 then can not to AC measurment mode,
Rock core impedance measurement system especially under frequency conversion sweep measurement mode is calibrated.
In order to solve the above-mentioned technical problem, the calibration component of rock core impedance spectroscopy measurement system provided in an embodiment of the present invention
100, by the way that parallel component 10 is arranged, which can not only calibrate the rock core impedance measurement system under DC measurement mode
System, can also calibrate the rock core impedance measurement system under AC measurment mode, especially frequency conversion sweep measurement mode.
Technical solution of the present invention is described in detail with specifically embodiment below.These specific implementations below
Example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 2 is the structural schematic diagram of the calibration component for the rock core impedance spectroscopy measurement system that the embodiment of the present invention one provides.Such as
Shown in Fig. 2, the calibration component 100 of the present embodiment includes: shell 11 with middle cavity body and by resistance unit 110 and storage
The parallel component 10 that unit 120 forms, the resistance unit 110 include at least one resistance, and the charge storage unit 120 includes extremely
A few inductance and/or at least one capacitor, the parallel component 10 are located in the cavity；
The impedance value of the parallel component 10 is consistent with the impedance value of rock core to be measured.
Specifically, as shown in Fig. 2, the calibration component 100 of the present embodiment includes shell 11 and parallel component 10, the shell 11 tool
There is hollow cavity, parallel component 10 is located in the cavity.
In order to enable the calibration component 100 of the present embodiment can calibrate the rock core impedance measurement system of AC measurment mode, especially
It is the rock core impedance measurement system under frequency conversion sweep measurement mode, then charge storage unit is arranged in the calibration component 100 of the present embodiment
120, which includes at least one inductance and/or at least one capacitor.
Fig. 3 is the actual measurement frequency dispersion rule figure of rock, from the figure 3, it may be seen that the rock to be measured of the water saturation of different rock cores to be measured
The heart, with the variation of frequency, the resistivity (i.e. impedance value) of rock core is in nonlinear change.And the calibration component 100 of the present embodiment,
In the parallel component 10 that is made of resistance unit 110 and charge storage unit 120, resistivity with frequency variation in non-linear
Variation, and it is almost the same with the variation tendency of the resistivity of rock core.Therefore, it is possible to use the calibration component 100 of the present embodiment can be with
Efficiently and accurately calibrate the rock core impedance measurement system under AC measurment mode or the rock core resistance under frequency conversion sweep measurement mode
Anti- measuring system.
For example, it is assumed that 10 1 resistance of parallel component of the present embodiment and capacitor it is in parallel and
At, wherein for the parallel component 10 of pure resistance and purely capacitive composition, impedance value can be indicated are as follows:
The π of ω=2 f (2)
In formula, Z is the impedance value of parallel component 10, and R is resistance value, and C is capacitance, and ω is angular frequency, and f is measurement frequency
Rate, j are unit imaginary number.Formula (1) can deform are as follows:
In formula (3), Z ' is the real part of 10 complex impedance of parallel component, and Z " is the imaginary part of 10 complex impedance of parallel component.
As shown in figure 5, the real part and imaginary part of parallel component 10 can be presented variation shown in fig. 5 and advise with the increase of frequency
Rule.
As shown in figure 3, a large amount of petrophysics experiment shows that frequency dispersion rule shown in Fig. 3 is presented in the impedance value of rock core, and
The frequency dispersion rule of Fig. 3 and Fig. 5 is consistent.Therefore, it can use the parallel component 10 of pure resistance device 20 and purely capacitive device composition
The Dispersion of simulation core.
Optionally, the parallel component 10 of the present embodiment can also be made of multiple resistance and multiple capacitors, wherein each resistance
Between can in parallel, series connection or series-parallel connection, between each capacitor can in parallel, series connection or series-parallel connection, each resistance and each
It can in parallel, series connection or series-parallel connection between capacitor.The present embodiment does not do the connection type between each resistance and each capacitor
Limitation is determined with specific reference to actual needs, as long as guaranteeing the impedance value of the parallel component 10 constituted and the impedance value of rock core to be measured
It is consistent.
Optionally, the parallel component 10 of the present embodiment can also be made of multiple resistance and multiple inductance, between each resistance
Can in parallel, series connection or series-parallel connection, can in parallel, series connection or series-parallel connection, each resistance and each inductance between each inductance
Between can in parallel, series connection or series-parallel connection.The present embodiment to the connection type between each resistance and each inductance with no restrictions,
It is determined with specific reference to actual needs, is as long as guaranteeing that the impedance value of the parallel component 10 constituted is consistent with the impedance value of rock core to be measured
It can.
Optionally, the parallel component 10 of the present embodiment can also be made of multiple resistance, multiple capacitors and multiple inductance, respectively
Between resistance can in parallel, series connection or series-parallel connection, between each inductance can in parallel, series connection or series-parallel connection, each capacitor
Between can in parallel, series connection or series-parallel connection, can in parallel, series connection or series-parallel between each resistance, each capacitor and each inductance
Connection.The present embodiment to the connection type between each resistance, each capacitor and each inductance with no restrictions, it is true with specific reference to actual needs
It is fixed, as long as guaranteeing that the impedance value of the parallel component 10 constituted is consistent with the impedance value of rock core to be measured.
Optionally, its both ends of the shell 11 of the present embodiment have opening, and parallel component 10 can be put by the opening at both ends
In the cavity for entering shell 11.
Optionally, one end of the shell 11 of the present embodiment has opening, other end closing, and parallel component 10 can pass through one
The opening at end is put into the cavity of shell 11.
Optionally, the shell 11 of the present embodiment includes the upper half and lower half, and the upper half and lower half can open and close, when
When needing to be put into parallel component 10, it will be partially opened on shell 11, after parallel component 10 is put into the cavity of shell 11,
Upper part and lower half are closed again.Optionally, the shell 11 of the present embodiment can also be other structures, and the present embodiment is external
The specific structure of shell 11 is with no restrictions.
Optionally, the shell 11 of the present embodiment can be cylindrical body, cuboid or round and square tube body etc., and the present embodiment is to shell
11 concrete shape is also with no restrictions.
In the present embodiment, the pin of parallel component 10 can directly be connect with rock core impedance spectroscopy measurement system, be used for school
Quasi- rock core impedance spectroscopy measurement system.Optionally, when shell 11 is that conductor material is made, the pin of parallel component 10 can be with
It is connect by shell 11 with rock core impedance spectroscopy measurement system, such as the pin of parallel component 10 is connect with the inner wall of shell 11,
Shell 11 is connect with rock core impedance spectroscopy measurement system again, and then realizes parallel component 10 and rock core impedance spectroscopy measurement system
Connection.
For the present embodiment compared with existing calibration component 100, what is welded in the cavity of shell 11 is no longer simple resistor
Part 20, but choose the parallel component 10 of resistance known to resistance value, capacitor and/or inductance composition.The calibration component 100 formed in this way
It can be used for rock core impedance measurement system (the i.e. rock core impedance spectroscopy measurement under AC measurment mode and under sweep measurement mode
System) systematic error be corrected, the accuracy of rock core impedance measurement system error correction can be improved.
The calibration component of rock core impedance spectroscopy measurement system provided in an embodiment of the present invention has the outer of middle cavity by being arranged
Shell and the parallel component being made of resistance unit and charge storage unit, the resistance unit include at least one resistance, the storage
Electric unit includes at least one inductance and/or at least one capacitor, and the parallel component is located in the cavity；The parallel connection group
The impedance value of part is consistent with the impedance value of rock core to be measured.The frequency spectrum of the impedance spectrum variation and rock core of the parallel component of the present embodiment
Variation is consistent, can efficiently and accurately be calibrated using the calibration component of the present embodiment and obtain rock core impedance measurement under AC measurment mode
Rock core impedance measurement system under system or frequency conversion sweep measurement mode.
The first structural schematic diagram of parallel component in the calibration component that Fig. 6 is related to for the embodiment of the present invention two, such as Fig. 6 institute
Show, the resistance unit 110 of the present embodiment includes at least one resistance, and the charge storage unit 120 includes at least one capacitor, described
Resistance unit 110 is connected in parallel with the charge storage unit 120.
Specifically, the parallel component 10 of the present embodiment is in addition to as shown in figure 4, include other than an electricity is organized with a capacitor, originally
The resistance unit 110 of embodiment can also include multiple resistance, can be connected in parallel between each resistance, be connected in series or portion
Sub-resistance is in parallel, partial ohmic series connection, the present embodiment to the connection type of each resistance in resistance unit 110 with no restrictions, specifically
Determine according to actual needs.
The charge storage unit 120 of the present embodiment can also include multiple capacitors, can be connected in parallel between each capacitor, company of connecting
It connects or partition capacitance parallel connection, partition capacitance series connection, the present embodiment does not do the connection type of each capacitor in charge storage unit 120
Limitation is determined with specific reference to actual needs.
Finally, the charge storage unit 120 that the resistance unit 110 of each resistance composition is formed with each capacitor is connected in parallel.
In a kind of example, as shown in figure 4, parallel component 10 includes 3rd resistor and in parallel with the 3rd resistor the
Three capacitors determine the impedance value Z of the parallel component 10 according to the following formula:
Wherein, the R1 is the resistance value of the 3rd resistor,ρ is the resistivity for being intended to simulation core,A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the rock core to be measured
Porosity, SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the sectional area of the rock core to be measured；
The C1 is the capacitance of the third capacitor,
εrFor the relative dielectric constant of the rock core to be measured, εrm、εrw、εrhSkeleton, water flooding and the hydro carbons of the respectively described rock core to be measured
Relative dielectric constant, ε0For permittivity of vacuum；The ω is angular frequency, and the π of ω=2 f, the f are measurement frequency, the j
For unit imaginary number.
In order to make the Dispersion of standard component be truly reflected the Dispersion of true core as far as possible, 3rd resistor resistance value
Selection, which can use geophysical log field saturation degree and evaluate the most commonly used Archie formula, to be estimated:
The estimation of third capacitor can be estimated that (1GHz is left under high frequency according to the interpretation model that high-frequency dielectric is logged well
It is right):
Since the dielectric constant of rock equally exists dispersion phenomenon, as frequency increases, dielectric constant can decline to a great extent.In
It is calculated on the basis of the capacitance of the third capacitor under high frequency condition, calculated value is amplified into certain multiple (such as ten
Times) so that in the impedance value frequency spectrum of parallel component 10 impedance spectrum of the lowest point frequency and true core of imaginary part the lowest point frequency
Place frequency band is close.
Second of structural schematic diagram of parallel component in the calibration component that Fig. 7 is related to for the embodiment of the present invention two, such as Fig. 7 institute
Show, the resistance unit 110 includes first resistor and second resistance, and the charge storage unit 120 includes first capacitor and the second electricity
Hold, the first resistor and first capacitor after series connection are in parallel with the second resistance and second capacitor.Parallel connection as shown in Figure 7
The impedance value Z of component 10 can be obtained according to existing electricity knowledge, and details are not described herein.
The third structural schematic diagram of parallel component in the calibration component that Fig. 8 is related to for the embodiment of the present invention two, such as Fig. 8 institute
Show, the resistance unit 110 of the present embodiment includes at least one resistance, and the charge storage unit 120 includes at least one inductance, described
Resistance unit 110 is connected in parallel with the charge storage unit 120.
Specifically, the resistance unit 110 of the present embodiment can also include multiple resistance, in parallel can connect between each resistance
Connect, be connected in series or partial ohmic is in parallel, partial ohmic series connection, the present embodiment in resistance unit 110 each resistance it is specific
Connection type with no restrictions, is determined with specific reference to actual needs.
The charge storage unit 120 of the present embodiment includes multiple inductance, can be connected in parallel, is connected in series between each inductance, or
Person's partial inductance is in parallel, partial inductance is connected, and the present embodiment does not limit the specific connection type of each inductance in charge storage unit 120
System is determined with specific reference to actual needs.
Finally, the charge storage unit 120 that the resistance unit 110 of each resistance composition is formed with each inductance is connected in parallel.
In a kind of example, as shown in figure 9, parallel component 10 is by a resistance (being denoted as the 4th resistance) and an inductance
(being denoted as the first inductance) is connected in parallel, at this point, determining the impedance value Z of the parallel component 10 according to the following formula:
Z=R2+jwL1
Wherein, the R2 is the 4th resistance value,ρ is the resistivity for being intended to simulation core,A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the rock to be measured
The porosity of the heart, SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the rock core to be measured
Sectional area；The L1 is the inductance value of first inductance；The ω is angular frequency, and the π of ω=2 f, the f are measurement frequency,
The j is unit imaginary number.
4th kind of structural schematic diagram of parallel component in the calibration component that Figure 10 is related to for the embodiment of the present invention two, such as Figure 10 institute
Show, the embodiment of the present invention resistance unit 110 includes at least one resistance, and the charge storage unit 120 includes at least one inductance
With at least one capacitor.
Specifically, the resistance unit 110 of the present embodiment can also include at least one resistance, it can be in parallel between each resistance
Connection, series connection or partial ohmic parallel connection, partial ohmic series connection, company of the present embodiment to each resistance in resistance unit 110
It connects mode with no restrictions, is determined with specific reference to actual needs.
The charge storage unit 120 of the present embodiment includes at least one inductance and at least one capacitor, each inductance and each capacitor it
Between can be connected in parallel, be connected in series or partial inductance is in parallel with capacitor, partial inductance is connected in series to the capacitor, the present embodiment pair
Connection type in charge storage unit 120 between each inductance and each capacitor with no restrictions, is determined with specific reference to actual needs.
In a kind of example, as shown in figure 11, the parallel component 10 includes the 5th resistance, the second inductance being connected in parallel
With the 5th capacitor, the impedance Z of the parallel component 10 is determined according to the following formula:
Wherein, the R3 is the resistance value of the 5th resistance,ρ is the resistivity for being intended to simulation core,A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the hole of the rock core to be measured
Porosity, SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the sectional area of the rock core to be measured；Institute
The capacitance that C2 is the 5th capacitor is stated,
εrFor the relative dielectric constant of the rock core to be measured, εrm、εrw、εrhSkeleton, water flooding and the hydro carbons of the respectively described rock core to be measured
Relative dielectric constant, ε0For permittivity of vacuum；The L2 is the inductance value of second inductance；The ω is angular frequency,
The π of ω=2 f, the f are measurement frequency, and the j is unit imaginary number.
Figure 12 is the structural schematic diagram of the calibration component for the rock core impedance spectroscopy measurement system that the embodiment of the present invention three provides.Such as
Shown in Figure 12, the calibration component 100 of the present embodiment includes the first conductive cover 12 that lid is located at the first end of the shell 11, and lid
It is located at the second conductive cover 13 of the second end of the shell 11, first conductive cover 12 and second conductive cover 13
On be provided with the through-hole being connected to the cavity, the first pin of the parallel component 10 is threaded through first conductive cover
It is connected in through-hole on 12 with first conductive cover 12, the second pin of the parallel component 10 is threaded through described second and leads
It is connected in through-hole on electric lid 13 with second conductive cover 13.
Specifically, as shown in figure 12, the first conductive cap is arranged in the first end of shell 11 in the calibration component 100 of the present embodiment
The second conductive cover 13 is arranged in the second end of shell 11 in body 12.Wherein, the first conductive cover 12 can with the first end of shell 11
Be welded to connect, bonding or clamping etc., similarly, the second end of the second conductive cover 13 and shell 11 can be welded connecting,
Bonding or clamping etc..
For the ease of the connection of the pin and shell 11 of parallel component 10, in the second conductive cap to the first conductive cover 12
It is respectively provided with through-hole on body 13, which is connected to the cavity of shell 11.In actual installation, by the first pin of parallel component 10
It is connect in the through-hole being threaded through in the first conductive cover 12 with the first conductive cover 12, the second pin of parallel component 10 is threaded through
It is connect in through-hole in second conductive cover 13 with the second conductive cover 13.For example, two pins of parallel component 10 are distinguished
It after being pierced by the through-hole in the first conductive cover 12 and the second conductive cover 13, is welded, and cuts off pin and stretch out the first conduction
Lid 12 and the extra part of the second conductive cover 13, so that parallel component 10 is conductive with the first conductive cover 12 and second respectively
Lid 13 is connected.
First conductive cover 12 and the second conductive cover 13 of the present embodiment are made of conductor material, such as by brass system
At.
The shell 11 of the present embodiment is identical as the shape of rock core to be measured.
Optionally, the shell 11 of the present embodiment is made of high-temperature material.
The calibration component of the present embodiment, the impedance value of parallel component it is known that and the shape of calibration component and rock core to be measured shape
Shape is identical, therefore can directly be measured using rock core impedance measurement system to calibration component known to resistance value, by measured value with
The real impedance values of calibration component are compared, to realize the correction to rock core impedance measurement system error.
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 (8)
1. a kind of calibration component of rock core impedance spectroscopy measurement system characterized by comprising with hollow cavity shell, with
And the parallel component being made of resistance unit and charge storage unit, the resistance unit include at least one resistance, the storage list
Member includes at least one inductance and/or at least one capacitor, and the parallel component is located in the cavity；
The impedance value of the parallel component is consistent with the impedance value of rock core to be measured；
Wherein, if the resistance unit includes at least one resistance, the charge storage unit includes at least one capacitor, the resistance
Unit is connected in parallel with the charge storage unit；
Correspondingly, the parallel component includes 3rd resistor and the third capacitor in parallel with the 3rd resistor, according to following public affairs
Formula determines the impedance Z of the parallel component:
Wherein, the R1 is the resistance value of the 3rd resistor,ρ is the resistivity for being intended to simulation core,A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the rock core to be measured
Porosity, SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the section of the rock core to be measured
Product；The C1 is the capacitance of the third capacitor,
εrFor the relative dielectric constant of the rock core to be measured, εrm、εrw、εrhSkeleton, water flooding and the hydro carbons of the respectively described rock core to be measured
Relative dielectric constant, ε0For permittivity of vacuum；The ω is angular frequency, and the π of ω=2 f, the f are measurement frequency, the j
For unit imaginary number；
Wherein, the capacitance of the third capacitor expands ten times greater again.
2. calibration component according to claim 1, which is characterized in that the resistance unit includes at least one resistance, described
Charge storage unit includes at least one inductance, and the resistance unit is connected in parallel with the charge storage unit.
3. calibration component according to claim 1, which is characterized in that the resistance unit includes at least one resistance, described
Charge storage unit includes at least one inductance and at least one capacitor.
4. calibration component according to claim 1, which is characterized in that the resistance unit includes first resistor and the second electricity
Resistance, the charge storage unit include first capacitor and the second capacitor, first resistor and first capacitor and second electricity after series connection
Resistance and second capacitor are in parallel.
5. calibration component according to claim 1-4, which is characterized in that lid is located at the of the first end of the shell
One conductive cover, and lid are located at the second conductive cover of the second end of the shell, first conductive cover and described second
The through-hole being connected to the cavity is provided in conductive cover, the first pin of the parallel component is threaded through described first and leads
It is connect in through-hole on electric lid with first conductive cover, the second pin of the parallel component is threaded through described second and leads
It is connect in through-hole on electric lid with second conductive cover.
6. calibration component according to claim 5, which is characterized in that the first of first conductive cover and the shell
End and second conductive cover are threadedly coupled with the second end of the shell.
7. calibration component according to claim 2, which is characterized in that the parallel component includes the 4th resistance and with described the
First inductance of four resistor coupled in parallel, determines the impedance Z of the parallel component according to the following formula:
Z=R2+jwL1
Wherein, the R2 is the 4th resistance value,ρ is the resistivity for being intended to simulation core,
A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the porosity of the rock core to be measured,
SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the sectional area of the rock core to be measured；Institute
State the inductance value that L1 is first inductance；The ω is angular frequency, and the π of ω=2 f, the f are measurement frequency, and the j is unit
Imaginary number.
8. calibration component according to claim 3, which is characterized in that the resistance unit includes the 5th electricity being connected in parallel
Resistance, the second inductance and the 5th capacitor, determine the impedance Z of the parallel component according to the following formula:
Wherein, the R3 is the resistance value of the 5th resistance,ρ is the resistivity for being intended to simulation core,
A, b, m, n are respectively litho-electric parameters, ρwFor formation water resistivity in the rock core to be measured,For the porosity of the rock core to be measured,
SwFor the water saturation of the rock core to be measured, l is the length of the rock core to be measured, and S is the sectional area of the rock core to be measured；It is described
C2 is the capacitance of the 5th capacitor,
εrFor the relative dielectric constant of the rock core to be measured, εrm、εrw、εrhSkeleton, water flooding and the hydro carbons of the respectively described rock core to be measured
Relative dielectric constant, ε0For permittivity of vacuum；The L2 is the inductance value of second inductance；The ω is angular frequency,
The π of ω=2 f, the f are measurement frequency, and the j is unit imaginary number.
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| CN201810516493.2A CN108873104B (en) | 2018-05-25 | 2018-05-25 | The calibration component of rock core impedance spectroscopy measurement system |
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| CN111398117B (en) * | 2020-03-15 | 2023-05-26 | 长江大学 | Rock core electric frequency dispersion analysis method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203285425U (en) * | 2013-05-20 | 2013-11-13 | 中国石油天然气集团公司 | Clamp holder |
| CN206556955U (en) * | 2016-12-30 | 2017-10-13 | 西南石油大学 | Core holding unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203285425U (en) * | 2013-05-20 | 2013-11-13 | 中国石油天然气集团公司 | Clamp holder |
| CN206556955U (en) * | 2016-12-30 | 2017-10-13 | 西南石油大学 | Core holding unit |
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