CN111963160B - Portable nuclear magnetic resonance logging calibration device and rapid calibration method - Google Patents
Portable nuclear magnetic resonance logging calibration device and rapid calibration method Download PDFInfo
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- CN111963160B CN111963160B CN202010888503.2A CN202010888503A CN111963160B CN 111963160 B CN111963160 B CN 111963160B CN 202010888503 A CN202010888503 A CN 202010888503A CN 111963160 B CN111963160 B CN 111963160B
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention discloses a portable nuclear magnetic resonance logging calibration device and a rapid calibration method, wherein the device comprises a cover, a shell and an inner cavity, the cover is matched with the shell, a sealing element is arranged between the cover and the shell, a geological-like layer medium and a fluid medium are filled in the inner cavity, the logging calibration device comprises a plurality of standard blocks, and the standard blocks are mutually connected to form a cylinder with an annular bottom surface; the calibration device and the calibration method adopt glass beads, real rock cores and other simulated rock skeleton media, adopt oil and water to simulate fluid media of an underground oil-gas layer to manufacture a standard block, and perform multi-point calibration under the conditions of simulating a pore structure of underground rock and containing oil and water; the multi-point calibration device has the characteristic of portability, and realizes the calibration of the logging field instrument; the detachable standard blocks are uniformly distributed, so that the difference of nuclear magnetic resonance logging scale fluid caused by the limitation of field conditions is avoided, uniform scales among different instruments in different regions are realized, and the comparison cost of the measurement effect of the instruments on the ground is reduced.
Description
Technical Field
The invention belongs to the technical field of petroleum and natural gas exploration and development, and particularly relates to a portable nuclear magnetic resonance well logging calibration device and a rapid calibration method.
Background
NMR acquisition of transverse relaxation time (T) using CPMG sequences 2 ) Signal amplitude and transverse relaxation time spectrum (hereinafter referred to as T) of echo train 2 Spectra) and the number of hydrogen atoms of an acquisition object are in a linear positive correlation relationship, and in the oil and gas industry, a nuclear magnetic resonance logging instrument is generally filled with CuSO 4 The scale water tank of the solution carries out instrument single-point scale, namely, the scale water tank T is collected 2 Obtaining the T2 spectral area when the water saturation is 100% by spectrum, and establishing T with the theoretical value 0 of the T2 spectral area when the water saturation is 0% 2 And the scale of the nuclear magnetic resonance logging instrument is realized by a conversion equation between the spectral area and the water saturation.
At present, the method has the following defects: the medium filled in the graduated water tank is generally pure water or CuSO 4 Solution, unable to simulate the pore structure of underground rock; secondly, the influence of single-point scale on the incapability of removing the background signal of the instrument is avoided; thirdly, a single data point of the single-point calibration method has large influence on the calibration result, and the data controllability is low in the calibration process; fourthly, the single-point calibration method cannot be accurateAcquiring the accuracy of the instrument for acquiring signals with water saturation between 0% and 100%; sixthly, the scale water tank cannot perform instrument scale on a logging site due to overlarge volume and weight, and cannot segment an instrument detection area and detect the instrument detection performance in a single area due to structural limitation.
Meanwhile, the box body is divided into a plurality of boxes and CuSO 4 The solution is prepared on site, and the site often does not have the capability of accurately preparing the solution with fixed concentration, so that the solutions used by the scales of the instruments in different areas are inconsistent, and the uniform scales of the instruments cannot be used for comparing the measurement effect of the instruments in different areas.
Disclosure of Invention
The invention aims to provide a portable nuclear magnetic resonance well logging scale device and a rapid scale method, which can realize multi-point scale of a well logging instrument on a well logging site and ground comparison of measurement effects of different instruments in different regions.
In order to achieve the purpose, the invention adopts the technical scheme that:
a portable nuclear magnetic resonance well logging scale device comprises a plurality of standard blocks, wherein the standard blocks are connected with one another to form a cylinder with an annular bottom surface, a fan-shaped bottom surface or a semi-annular bottom surface; the standard block comprises a cover, a shell and an inner cavity, the cover is in sealing fit with the shell to form a sealed inner cavity, a sealing element is arranged between the cover and the shell, and the inner cavity is filled with a geological layer simulating medium and a fluid medium.
The simulated geological formation medium meets similar conditions or a core in the well to be logged is used.
The fluid medium is heavy water and CuSO 4 Solution mixed liquor, mixed liquor of heavy water and distilled water or NaCl solution.
The outer wall of the standard block is provided with a structure which is detachably connected with the adjacent standard block.
The support frame is an annular cylinder with the bottom surface, a fan-shaped cylinder with the bottom surface or a semi-annular cylinder with the bottom surface, a plurality of sashes are uniformly arranged on the outer side of the support frame, the shape of the standard block is the same as that of the accommodating space formed by the sashes, and the standard block is arranged in the sashes of the support frame.
The support frame includes first support and second support, can dismantle between first support and the second support and connect.
The first support and the second support of support frame all are provided with a plurality of sections, can dismantle the connection between the adjacent section.
The standard block is detachably connected with the support frame.
A fast calibration method, comprising the steps of:
Step 5, repeating the step 3 and the step 4 and recording the total water volume V of the standard block in sequence i And T2 spectral area S i I is 3, 4,5 … n, n is not less than 6;
step 6, according to the total water volume V of the standard block i And T2 spectral area S i Establishing a scale equation between the measurement data and the corresponding water-containing volume; and the scale equation is checked; if the error does not meet the requirement, returning to the step 1 to perform the calibration again;
and 7, randomly extracting the standard block, installing the standard block on a calibration device, recording the total water-containing volume V of the standard block, measuring and recording the measured data T2 spectral area by using a nuclear magnetic resonance logging instrument, inputting the total water-containing volume V of the standard block and the T2 spectral area into a calibration equation to calculate the water-containing volume, comparing the calculated error between the water-containing volume and the total water-containing volume of the standard block, if the error meets the requirement, finishing the calibration, and if the error does not meet the requirement, repeating the steps 1-7 until the error requirement is met.
Compared with the prior art, the invention has at least the following beneficial effects:
the calibration device can adopt glass beads, real rock cores and other simulated rock skeleton media, adopts oil and water to simulate fluid media of an underground oil-gas layer to manufacture a standard block, and carries out multi-point calibration under the conditions of simulating a pore structure of underground rock and containing oil and water; the multi-point calibration device has the characteristic of portability, and realizes the calibration of the logging field instrument; meanwhile, the detachable standard blocks are uniformly distributed, so that the difference of nuclear magnetic resonance well logging scale fluids caused by field condition limitation in the prior art is avoided, uniform scales among different instruments in different regions are realized, and the cost for comparing the measurement effect of the instruments on the ground is reduced; by orderly installing the standard blocks, the detection performance of instruments in a single detection region can be detected by segmenting the detection region.
Furthermore, the standard blocks and the support frame are detachably connected, so that the convenience of field free combination assembly is greatly improved, and the portability is further enhanced.
The method of the invention is adopted to carry out multi-point calibration, thus eliminating the influence caused by the self background signal of the instrument; t is a unit of 2 The conversion equation between the spectrum area and the water saturation is controlled by a plurality of data points, so that the weight of the influence of a single data point on a scale result is reduced, and the scale precision of the instrument is improved; the multi-point calibration method can accurately acquire signals when the water saturation of the instrument is between 0% and 100%; the multi-point calibration device has the characteristic of portability, and realizes the calibration of the logging field instrument; meanwhile, the detachable standard blocks are uniformly distributed, so that the difference of nuclear magnetic resonance logging scale fluids caused by field condition limitation in the prior art is avoided, uniform scales among different instruments in different regions are realized, and the cost for comparing the measuring effect of the instruments on the ground is reduced.
Drawings
Fig. 1 is a schematic diagram of a possible overall implementation structure of the device according to the present invention.
FIG. 2 is a radial and slice view of the apparatus of FIG. 1.
Fig. 3 is a schematic view of a detachable radial skeleton and a detachable standard block section in fig. 1.
Fig. 4 is a radial and slice view of the removable proof mass of fig. 1.
Fig. 5 is a schematic view of an axial slice of the device of fig. 1.
Fig. 6 is an axial and sectioned diagrammatic view of the demountable framework of fig. 1.
FIG. 7 is an axial view of a standard block and an exploded slice of the present invention.
FIG. 8 is an overall view of a standard block according to the present invention.
Fig. 9 is a schematic diagram of the standard block with the housing and the cover detached.
1 standard block, 11 covers, 12 sealing members, 13 shells, 14 inner cavities, 15 positioning pins, 2 support frames, 21 first supports, 22 second supports, 3 middle part annuluses, 4 dovetail mortise and tenon joints.
Detailed Description
The invention is explained in detail below with reference to the drawings
Referring to fig. 1, 2, 5, 7, 8 and 9, a portable nmr well-logging scale device includes a plurality of standard blocks 1, wherein the plurality of standard blocks 1 are connected to form a cylinder with an annular bottom surface, a fan-shaped bottom surface or a semi-annular bottom surface; the standard block 1 comprises a cover 11, a shell 13 and an inner cavity 14, wherein the cover 11 is in sealing fit with the shell 13 to form the sealed inner cavity 14, a sealing member 12 is arranged between the cover 11 and the shell 13, and the inner cavity 14 is filled with a simulated geological layer medium and a fluid medium; the simulated geological formation medium meets similar conditions or a core in the well to be logged is used.
The fluid medium is heavy water and CuSO 4 Solution mixed liquor, mixed liquor of heavy water and distilled water or NaCl solution.
The outer wall of the standard block with reference to fig. 4 and 6 is provided with a structure which is detachably connected with the adjacent standard block.
Still include support frame 2, support frame 2 for the bottom surface be annular cylinder, the bottom surface be sectorial cylinder or the bottom surface be semi-annular cylinder, the outside of support frame is provided with evenly is provided with a plurality of sash, the accommodation space shape that standard block 1's shape and sash formed is the same, standard block 1 sets up in support frame 2's sash.
The standard block 1 is detachably connected with the support frame 2.
In an alternative embodiment, the supporting frame 2 comprises a first bracket 21 and a second bracket 22, and the first bracket 21 and the second bracket 22 are detachably connected.
The first support 21 and the second support 22 of the support frame 2 are provided with a plurality of sections, and adjacent sections are detachably connected.
The outer wall of standard block is provided with the structure of can dismantling the connection with adjacent standard block, and adjacent standard block is adjacent and axial is adjacent including circumference simultaneously.
Specific embodiment of the interconnection between the standard blocks 1:
optionally, dovetail mortise-tenon joints 4 are arranged on the outer side of the standard blocks 1, the dovetail mortise-tenon joints 4 are arranged on opposite side faces of the standard blocks 1, and two adjacent standard blocks 1 are connected through dovetail mortise-tenon joints 4;
the bottom of standard block 1 also can set up radial forked tail mortise structure, and standard block 1 designs for the fan-shaped piece, and the forked tail mortise structure realizes circumference and axial restraint between adjacent standard block 1 simultaneously.
Optionally, the standard blocks 1 are provided with pin holes, pins are placed in the pin holes of the adjacent standard blocks to realize connection of the adjacent standard blocks 1, and the pins are in interference fit with the pin holes.
Optionally, the plurality of standard blocks 1 are connected with each other to form a cylinder with an annular bottom surface, two adjacent standard blocks in the same layer are connected through a hasp, the standard blocks 1 in the same layer form a whole along the circumferential direction of the cylinder, and the standard blocks in the vertical direction of the cylinder are connected through a hasp or a pin, so that the standard blocks 1 form a whole along the axial direction of the cylinder.
The following is a specific embodiment of the interconnection of the standard block 1 and the support frame 2:
optionally, the outer wall of the standard block 1 is provided with a positioning pin 15, and the support frame 2 is provided with a pin hole corresponding to the positioning pin 15.
Optionally, the rest support frames 2 of the standard block 1 are connected by adopting a buckle.
Optionally, a plurality of partition plates are uniformly arranged on the outer side of the support frame 2 along the axial direction and the circumferential direction of the support frame, the axial direction and the circumferential direction form a sash, and the partition plates are detachably connected with the support frame 2.
Referring to fig. 3 and 4, the support frame 2 includes a first support 21 and a second support 22, and the first support 21 and the second support 22 are connected by dovetail mortise-tenon joint.
The invention provides a hollow cylindrical scale device based on the scale requirement of a nuclear magnetic resonance logging instrument, and preferably adopts a cylindrical scale device. The device adopts a detachable modular design and is formed by combining a support frame 2 and a plurality of standard blocks 1 which are assembled on the support frame 2 and have the same shape, and optionally, the support frame 2 comprises a plurality of detachable support frame modules, and refer to figures 1-7. The support frame and the standard block shell are made of non-metal materials (PEAK, ceramics, poly-tetra-vinyl, etc.) without nuclear magnetic signals. By adjusting the inner cavity 14 of the detachable standard block 1, referring to fig. 8 and 9, filling materials and water content into the detachable standard block, standard blocks with different rock pore structure conditions and water saturation are manufactured; and controlling the rock pore structure condition and the water saturation simulated by the calibration device by adjusting the combination mode among the standard blocks.
By means of the device, the calibration process is to perform the nuclear magnetic resonance measurement of the filler in the inner cavity 14 of the standard block 1, obtain the relation between the nuclear magnetic resonance measurement result and the volume of the measurement object, and establish the conversion equation between the nuclear magnetic resonance measurement result and the volume of the measurement object to realize the calibration of the nuclear magnetic resonance instrument. The key of the scale is that the inner cavity 14 of the standard block 1 is filled with filler. The inner cavity 14 of the standard block 1 of the invention can be filled with liquid, glass beads and liquid, real rock core and liquid and other functions:
1) filling liquid: the filling liquid 1 is prepared by mixing heavy water and CuSO4 solution with fixed concentration according to the proportion 1, the steps are repeated only by changing the mixing proportion to prepare the filling liquids 2, 3 and 4 … … respectively, the prepared filling liquids 1, 2, 3 and 4 … … are filled into the inner cavity 14 of the standard block 1 respectively, the volume of the filled and mixed liquid is recorded, and then the standard block is sealed by using the cover of the standard block. And calculating the volume value of the CuSO4 solution contained in each standard block according to the mixing ratio of the heavy water filled in each standard block and the CuSO4 solution with fixed concentration and the volume of the filled mixed liquid, recording the mass of each standard block, and labeling the concentration and the volume value of the CuSO4 solution of each standard block and the mass of the standard block. The purpose of labeling the volume value of the CuSO4 solution is to label the volume value of the CuSO4 solution of each standard block 1, so that the volume of the CuSO4 solution is quickly calculated when the standard blocks are combined with each other; the quality of the standard block 1 is to check whether the fluid contained in the cavity 14 of the standard block 1 is lost or not during long-term use, and to check whether each standard block 1 is qualified or not.
The heavy water has no nuclear magnetic resonance signal, the instrument scale efficiency can be improved by using the CuSO4 solution, and the volume of the CuSO4 solution can be changed under the condition that the volume of the inner cavity 14 of the standard block 1 is fixed by adopting the mode of mixing the heavy water with the CuSO4 solution; a fixed concentration of CuSO4 solution needs to be configured in the laboratory using a high precision apparatus;
2) filling glass beads and liquid: filling liquid 1 is prepared by mixing heavy water and distilled water according to the proportion 1, the density of the mixed liquid is measured, and the step 1) is repeated only by changing the mixing proportion to prepare filling liquids 2, 3 and 4 … … respectively. Filling glass beads with known diameters into an inner cavity 14 of a standard block 1, respectively filling prepared filling liquids 1, 2, 3 and 4 … … into the inner cavity 14 of the standard block 1, respectively recording the mass difference between the inner cavity 14 of the standard block 1 before and after the liquid is filled, calculating the volume of the mixed liquid poured into the inner cavity 14 of the standard block 1 according to the mass difference and the density of the mixed liquid, further calculating the volume value of distilled water in each standard block 1 according to the mixing proportion, and then sealing the standard block by using a cover of the standard block; and (3) only changing the diameter of the filled glass beads, repeating the steps, finally manufacturing and forming a series of standard blocks with different diameters and mixed glass beads and liquid, and marking the volume value of distilled water and the mass of each standard block, wherein the purpose is the same as that of the step 1).
Rock cores with different pore results can be simulated by using different glass beads for accumulation.
3) Real core and liquid: preparing a real core, processing the real core to the shape of an inner cavity 14 of the standard block 1, measuring the porosity in a laboratory, suggesting that a 5000mg/L NaCl solution is used, saturation is carried out according to a vacuumizing and pressurizing saturation mode, the water containing volume of the real core is calculated according to the porosity and the core volume, then the saturated core is filled into the inner cavity 14 of the standard block 1, and then the sealing of the standard block is realized by using a cover of the standard block. And labeling the water-containing volume value of each standard block and the quality of the standard block, and the purpose is the same as that of the step 1).
As an alternative embodiment, the volume ratio of the heavy water to the CuSO4 solution, the distilled water, and the NaCl solution is 0%: 100%, 10%: 90% and 20%: 80% and 30%: 70% and 40%: 60% and 50%: 50% and 60%: 40% and 70%: 30% and 80%: 20% and 90%: 10% or 100%: 0 percent.
The invention also discloses a matching calibration method of the device, and the method can realize the comparison of the multipoint calibration of the nuclear magnetic resonance logging instrument and the ground measurement effects of different instruments in different regions:
1) the multi-point calibration method (taking the calibration method of a standard block filled with liquid as an example, the calibration methods of other standard blocks are consistent with the method):
checking whether the quality of the standard block is consistent with the nominal value of the standard block, and checking whether the standard block is qualified.
Secondly, the standard block with the minimum water-containing volume and the support frame assembly are sequentially installed on the logging instrument, and the total water-containing volume V of the installed standard block is recorded 1 。
And thirdly, a calibration device for measuring the water-containing volume 1 by using a nuclear magnetic resonance logging instrument, and recording the measured data T2 spectral area 1 (dimensionless quantity).
And fourthly, replacing the standard blocks which are not installed on the calibration device with the standard blocks which are installed on the calibration device, and recording the total water containing volume 2 of the installed standard blocks. In principle, the nominal value of the water-containing volume of the standard block before and after replacement needs a certain difference, the number of replacement is not constant, and the collected data points can be separated on the coordinate axis of the water-containing volume.
A calibration device for measuring the water-containing volume 2 by using the nuclear magnetic resonance logging instrument, and recording the measured data T2 spectral area 2 (dimensionless quantity);
sixthly, repeating the step four and the step five for more than three times until the standard block with the maximum water-containing volume is completely arranged on the calibration device, and acquiring more than 5 different water-containing volumes and corresponding measured data T2 spectral areas;
and seventhly, using the measured data and the corresponding water-containing volume, establishing a scale equation between the measured data and the corresponding water-containing volume, checking the error between the water-containing volume calculated by the equation of each measured data and the actual water-containing volume, and checking. If the measurement error exceeds the requirement, the procedure returns to the step II to carry out the calibration again.
Randomly extracting a standard block, installing the standard block on a calibration device, recording the total water content volume of the standard block, and measuring and recording the spectral area of measurement data T2 by using a nuclear magnetic resonance logger. And (4) calculating the water-containing volume by using the data through a scale equation established in the step (c), and comparing the error between the calculated water-containing volume and the total water-containing volume of the standard block. If the requirement is met, the calibration is finished; if not, repeating the step two to the step eight, and graduating again.
Ground measurement effect comparison method for different instruments in different regions
Firstly, selecting logging instruments in different regions, and respectively recording serial numbers of the logging instruments.
Selecting a group of uniformly distributed standard blocks 1, remotely notifying operation groups of instruments to carry out inspection on the group of standard blocks, and if the standard blocks are unqualified, changing the standard block combination until all the standard blocks are qualified;
thirdly, mounting the support frame and the determined group of standard blocks 1 on an instrument, and determining uniform nuclear magnetic resonance acquisition parameters;
data acquisition and summarization, namely, data acquisition is carried out according to the steps from step two to step sixthly in the multi-point calibration method;
analyzing data, and evaluating the acquisition effect of different instruments according to the selected standard block data.
1) Multi-point scale for nuclear magnetic resonance instrument
Firstly, determining qualified standard block marks, and the result is shown in table 1.
Table 1 list of qualified standard blocks
Secondly, determining qualified standard block marks, sequentially assembling standard blocks No. 2-1 to No. 2-32, standard blocks No. 5-1 to No. 5-16 and a support frame on a logging instrument, and calculating the total water containing volume of the installed standard blocks to be 144 mL.
And measuring by using a nuclear magnetic resonance logging instrument, wherein the spectral area of the measured data T2 is 368 (dimensionless quantity).
And fourthly, replacing the standard blocks from No. 2-1 to No. 2-16 with the standard blocks from No. 5-17 to No. 5-32, and calculating the total water volume of the installed standard blocks to be 192 ml.
Measured by using a nuclear magnetic resonance logging instrument, and the spectral area of measured data T2 is 495 (dimensionless quantity).
Sixthly, replacing the standard blocks from No. 2 to No. 17 to No. 2 to No. 10 to No. 16 with the standard blocks, and calculating the total water volume of the installed standard blocks to be 320 ml.
Measured by using a nuclear magnetic resonance logging instrument, the measured data T2 has a spectral area of 810 (dimensionless quantity).
Eighthly, replacing the standard blocks No. 5-1 to 5-16 with the standard blocks No. 10-17 to 10-32, and calculating the total water volume of the installed standard blocks to be 400 ml.
Ninthly, measured by using the nuclear magnetic resonance logging instrument, the measured data T2 has a spectral area of 1031 (dimensionless quantity).
R replaces the standard block No. 5-17 to 5-32 with the standard block No. 15-1 to 15-16, and calculates the total water volume of the installed standard block to be 560 ml.
v (water volume) 0.415447094803666 a (measured data) -21.804194498434
The statistical results of the measured data are shown in Table 2, and the errors are all less than 10 percent and meet the requirements.
TABLE 2 statistical scale data table
2) Detection performance detection in single area of instrument
Firstly, installing a scale device framework on an instrument.
Secondly, the positions of the standard blocks to be installed in the installed scale device framework are labeled one by one according to 1-48 and recorded as sectors 1-48, so that the detection area of the instrument is segmented.
Thirdly, the No. 15-1 standard block is placed in the No. 1 sector, other positions are empty, a nuclear magnetic resonance logging instrument is used for measuring, the measured water-containing volume is calculated according to the scale equation, the water-containing volume is compared with the nominal value of the No. 15-1 standard block (or other types of standard blocks), the detection performance of the No. 1 area instrument is evaluated, and the No. 15-1 standard block is taken out from the No. 1 sector.
And fourthly, the sector 1 in the third step is respectively adjusted into a sector 2, a sector 3, a sector … … 47 and a sector 48, and the third step is repeated to finish one-by-one detection of the detection performance of the 48 detection areas of the instrument.
Claims (6)
1. A portable nuclear magnetic resonance well logging calibration device is characterized by comprising a plurality of standard blocks (1), wherein the standard blocks (1) are connected with one another to form a cylinder with an annular bottom surface, a fan-shaped bottom surface or a semi-annular bottom surface; the standard block (1) comprises a cover (11), a shell (13) and an inner cavity (14), the cover (11) is in sealing fit with the shell (13) to form a sealed inner cavity (14), a sealing element (12) is arranged between the cover (11) and the shell (13), and the inner cavity (14) is filled with a geological layer-imitated medium and a fluid medium; the outer wall of each standard block is provided with a structure detachably connected with the adjacent standard block or further comprises a support frame (2), the support frame (2) is a cylinder with an annular bottom surface, a fan-shaped cylinder with a sector bottom surface or a semi-annular cylinder with a semi-annular bottom surface, a plurality of lattices are uniformly arranged on the outer side of the support frame, the shape of each standard block (1) is the same as that of an accommodating space formed by the lattices, and the standard blocks (1) are arranged in the lattices of the support frame (2); a first support (21) and a second support (22) of the support frame (2) are provided with a plurality of sections, and adjacent sections are detachably connected.
2. A portable nmr well calibration device as claimed in claim 1, wherein the simulated geological formation medium meets similar conditions or uses a core in the well to be logged.
3. The portable nmr well calibration device of claim 1, wherein the fluid medium is heavy water or CuSO 4 Solution mixed liquor, mixed liquor of heavy water and distilled water or NaCl solution.
4. A portable nmr well-logging scale device according to claim 1, wherein the support (2) comprises a first support (21) and a second support (22), the first support (21) and the second support (22) being detachably connected.
5. A portable NMR well-logging scale according to claim 4, wherein the standard block (1) is detachably connected to the support frame (2).
6. A quick calibration method is characterized by comprising the following steps:
step 1, marking the target with the minimum water-containing volumeThe standard block and the support frame are assembled and installed on a logging instrument, and the total water containing volume V of the installed standard block is recorded i ，i＝1；
Step 2, measuring the water-containing volume V by using a nuclear magnetic resonance logging instrument 1 Time scale device and record the measured data T2 spectrum area S 1 ；
Step 3, replacing the standard block, and recording the total water-containing volume V of the standard block arranged on the logging instrument after replacement i ，i＝2，V 2 ≠V 1 ；
Step 4, measuring the water-containing volume V by using a nuclear magnetic resonance logging instrument 2 Time scale device and record the measured data T2 spectrum area S 2 ；
Step 5, repeating the step 3 and the step 4 and recording the total water volume V of the standard block in sequence i And T2 spectral area S i I is 3, 4,5 … n, n is not less than 6;
step 6, according to the total water volume V of the standard block i And T2 spectral area S i Establishing a scale equation between the measurement data and the corresponding water-containing volume; and the scale equation is checked; if the error does not meet the requirement, returning to the step 1 to carry out calibration again;
and 7, randomly extracting the standard block, installing the standard block on a calibration device, recording the total water-containing volume V of the standard block, measuring and recording the measured data T2 spectral area by using a nuclear magnetic resonance logging instrument, inputting the total water-containing volume V of the standard block and the T2 spectral area into a calibration equation to calculate the water-containing volume, comparing the calculated error between the water-containing volume and the total water-containing volume of the standard block, if the error meets the requirement, finishing the calibration, and if the error does not meet the requirement, repeating the steps 1-7 until the error requirement is met.
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