CN111721661A - Rock sample total volume measuring device and method - Google Patents
Rock sample total volume measuring device and method Download PDFInfo
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- CN111721661A CN111721661A CN201910222635.9A CN201910222635A CN111721661A CN 111721661 A CN111721661 A CN 111721661A CN 201910222635 A CN201910222635 A CN 201910222635A CN 111721661 A CN111721661 A CN 111721661A
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- 239000011435 rock Substances 0.000 title claims abstract description 247
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 153
- 238000005303 weighing Methods 0.000 claims abstract description 36
- 238000012545 processing Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 10
- 238000012360 testing method Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 4
- 230000004584 weight gain Effects 0.000 abstract description 2
- 235000019786 weight gain Nutrition 0.000 abstract description 2
- 230000005484 gravity Effects 0.000 description 8
- 239000011553 magnetic fluid Substances 0.000 description 7
- 239000003350 kerosene Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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- 238000003384 imaging method Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
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- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
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- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- 238000005070 sampling Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
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Abstract
The invention discloses a rock sample total volume measuring device and a method, wherein the measuring device comprises: the lifting unit comprises a moving component capable of moving along the vertical direction, and the tail end of the moving component is used for hanging the rock sample; the weighing unit is arranged at the end part of the lifting unit and is used for weighing the weight of the rock sample; the liquid container is arranged below the lifting unit and is used for containing liquid; the magnetic field generating device is arranged below the liquid container and can apply vertical downward magnetic force to the rock sample; according to the weight gain effect of the rock sample under the conditions of magnetic force and buoyancy, the weight of the rock sample in liquid under the conditions of different magnetic field strengths is weighed, the volume of the rock sample is respectively calculated, the total volume of the rock sample is determined in a mean value calculation mode, no special requirement is required for the appearance of the rock sample, the applicability is wide, the operation is simple and convenient, the determination period is short, and the test precision is high.
Description
Technical Field
The invention belongs to the field of oil-gas geological exploration and development, and particularly relates to a device and a method for measuring the total volume of a rock sample.
Background
The determination of the total volume of the rock sample is an important link for determining the porosity of the rock sample. The existing method for measuring the total volume of the rock sample mainly comprises a measuring method, a buoyancy method, a test tube liquid level method and a gas method. In addition, methods such as a variable density buoyancy method and a three-dimensional laser scanning imaging method have attracted attention in the art. The buoyancy method is characterized in that on the basis of drying a rock sample, the rock sample to be tested is soaked in liquid, the weight of the rock sample in the liquid is weighed under the conditions of normal temperature and normal pressure when the liquid does not enter the rock sample, and the specific gravity of the liquid is measured. And taking the rock sample out of the liquid, wiping off the liquid on the surface of the rock sample, weighing the weight of the soaked rock sample in the air, and dividing the difference between the weight of the rock sample in the air and the weight of the rock sample in the liquid by the specific gravity of the liquid to obtain the total volume of the rock sample. The method has the link of manually erasing the liquid on the surface of the rock sample, the measurement result is greatly influenced by human factors, and the measurement of the total volume of the granular rock sample is difficult to realize.
Three-dimensional laser scanning imaging methods have attracted attention in recent years, and for example, "three-dimensional laser scanning and gas displacement combined determination of rock effective porosity (geological scientific information, 7 months 2015)", "influence of tight reservoir sample volume measurement on porosity error (petroleum experimental geology report)" discloses such methods. The method comprises a three-dimensional laser scanner and a corresponding software system, wherein a three-dimensional model of the rock sample is formed by three-dimensional scanning of the rock sample, a three-dimensional image of the rock sample is obtained by specific software, and then the total volume of the rock sample is calculated. Research shows that the test accuracy is improved along with the increase of the scanning resolution, and the test accuracy of different rock samples can be different by the same scanning resolution. In addition, from the principle point of view, the measurement of the total volume of the granular rock sample (rock debris) is difficult to realize.
The patent 'a rock sample total volume variable density determination device and method (CN 201310169226X)', provides a variable density buoyancy method, the measuring medium selects magnetic fluid, the rock sample is placed in the magnetic fluid, the density of the magnetic fluid is adjusted under the action of the electromagnetic field, the weight of the rock sample in the magnetic fluid under the corresponding density is weighed, and the total volume of the rock sample is further calculated by buoyancy formula. Preliminary practice proves that the variable density buoyancy method has the technical advantages of small influence of human factors, short measurement period, wide application range and the like. In the implementation process of the method, the total volume of the rock sample is determined and calculated according to the change of the weight of the rock sample in the magnetic fluid along with the density of the magnetic fluid, the weight of the rock sample in the magnetic fluid is an important parameter, and the determination accuracy directly influences the determination and calculation accuracy of the total volume of the rock sample.
However, the patent "a rock sample total volume variable density measuring apparatus and method (CN 201310169226X)" has been developed based on the characteristics of magnetic liquid using magnetic liquid as a measuring medium, and no matter any magnetic liquid using water, kerosene, ester or the like as a base, on the one hand, the color is usually dark, and the state of the rock sample therein is difficult to observe; on the other hand, the magnetic liquid contains a certain amount of organic substances, and the rock sample is placed in the magnetic liquid, so that the magnetic liquid is adhered to the surface of the rock sample to a certain degree, is difficult to remove, and is inconvenient for subsequent test analysis of organic geochemistry and the like.
Therefore, a rock sample total volume testing device and method which are less affected by human factors and have no limit requirements on the rock sample form are needed to meet the requirements of subsequent testing.
Disclosure of Invention
In order to better meet the requirements of oil-gas geological research work, the device and the method for conveniently measuring the total volume of the rock are provided, the limit on a measuring medium is less, the influence of human factors on the measurement of the total volume of the rock sample is reduced, the operation is simple, convenient and quick, and the shape of the rock sample is not limited.
In order to achieve the above object, according to an aspect of the present invention, there is provided a rock sample total volume measuring apparatus, including:
the lifting unit comprises a moving component capable of moving along the vertical direction, and the tail end of the moving component is used for hanging the rock sample;
the weighing unit is arranged at the end part of the lifting unit and is used for weighing the weight of the rock sample;
the liquid container is arranged below the lifting unit and is used for containing liquid;
a magnetic field generating device which is arranged below the liquid container, can apply vertical downward magnetic force to the rock sample, and can adjust the intensity of the magnetic field generated by the magnetic field generating device;
a processing unit that calculates a total volume of the rock sample according to the following formula:
wherein V represents the total volume of the rock sample, G0Represents the weight of the rock sample when it is not magnetically influenced in the liquid and the weight is stable, GjRepresenting the weight of the rock sample when the j th time is subjected to the magnetic force in the liquid, n representing the total number of measurements of the rock sample when the j th time is subjected to the magnetic force in the liquid, D0Denotes the original density of the liquid, DjWhich represents the apparent density of the liquid when the rock sample is subjected to magnetic force in the liquid for the jth time.
Preferably, the end of the moving part is provided with a rock sample frame, and the rock sample is arranged in the rock sample frame.
Preferably, the processing unit calculates the original density D of the liquid according to the following formula0：
D0＝(GC0-GC1)/VC
Wherein G isC0Represents the weight of the reference object when it is not magnetically attracted in the air, VCDenotes the volume of the reference, GC1The weight of the reference object when the magnetic force is not applied to the reference object in the liquid is shown.
Preferably, the processing unit calculates the apparent density D of the liquid according to the following formulaj：
Dj＝D0*(G-Gj)/(G-G0)
Wherein G represents the weight of the rock sample in air when the rock sample is not subjected to magnetic force in air.
Preferably, the magnetic field generating means comprises an electromagnet.
Preferably, the liquid container is arranged in the thermostatic device.
Preferably, the lifting device further comprises a support, the support comprises a horizontally arranged cross beam and vertical beams arranged on two sides of the cross beam, one end of the lifting unit is arranged on the cross beam, the other end of the lifting unit is provided with a mechanical arm, and the mechanical arm can move in the vertical direction.
According to another aspect of the present invention, a method for determining the total volume of a rock sample is provided, the method comprising the steps of:
immersing the rock sample in the liquid by the lifting unit, and weighing the weight G of the rock sample when the rock sample is not subjected to magnetic force in the liquid and the weight is stable0；
Starting the magnetic field generating device n times, respectively applying different magnetic forces to the rock sample, and respectively weighing the weight G of the rock sample when the rock sample is subjected to the magnetic forces in the liquidj；
Calculating the total volume of the rock sample according to the following formula:
preferably, the original density D of the liquid is measured by the following steps0：
Weighing G when reference object is not subjected to magnetic force in airC0；
Weighing G when reference object is not applied with magnetic force in liquidC1；
According to formula D0＝(GC0-GC1)/VCCalculating the original density D of the liquid0In which V isCIndicating the volume of the reference.
Preferably, the apparent density D of the liquid when the j-th time of the rock sample is subjected to the magnetic force in the liquid is determined byj：
Weighing the weight G of the rock sample when the rock sample is not subjected to magnetic force in the air;
according to formula Dj＝D0*(G-Gj)/(G-G0) Calculating the apparent density D of the liquid when the j time of the rock sample is subjected to magnetic force in the liquidj。
The invention has the following beneficial effects: through placing rock specimen and liquid container on magnetic field generating device, the rock specimen receives except gravity and buoyancy, the effort of magnetic field in addition, according to the rock specimen weight gain effect under magnetic force and buoyancy condition, weigh the weight of rock specimen under different magnetic field intensity condition in the liquid, obtain the weight data of rock specimen under the different magnetic field intensity condition of many times, and the apparent density parameter of liquid, calculate the rock specimen volume respectively, confirm the rock specimen total volume with the mode of asking for the average value, can select liquid such as water, kerosene, absolute ethyl alcohol as the measuring medium as required, not only do not influence the follow-up test of rock specimen, can also satisfy multiple test demand, there is not special requirement to the appearance of rock specimen, wide suitability has, and is easy and simple to handle, the survey cycle is short, the measuring accuracy is high.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings. Wherein like reference numerals generally represent like parts throughout the exemplary embodiments.
Fig. 1 is a schematic structural diagram of a rock sample total volume measuring apparatus according to an embodiment of the present invention.
Description of reference numerals:
1. a support; 2. a lifting unit; 3. a weighing unit; 4. a rock sample frame; 5. sampling rock; 6. a liquid container; 7. a liquid; 8. a magnetic field generating device; 9. and a processing unit.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment of the invention provides a rock sample total volume measuring device, which comprises:
the lifting unit comprises a moving component capable of moving along the vertical direction, and the tail end of the moving component is used for hanging the rock sample; the weighing unit is arranged at the end part of the lifting unit and is used for weighing the weight of the rock sample; the liquid container is arranged below the lifting unit and is used for containing liquid; the magnetic field generating device is arranged below the liquid container, can apply vertical downward magnetic force to the rock sample, and can adjust the intensity of the magnetic field generated by the magnetic field generating device; the processing unit is used for calculating the total volume of the rock sample according to the following formula:
wherein V represents the total volume of the rock sample, G0Represents the weight of the rock sample when it is not magnetically influenced in the liquid and the weight is stable, GjRepresenting the weight of the rock sample when the j th time is subjected to the magnetic force in the liquid, n representing the total number of measurements of the rock sample when the j th time is subjected to the magnetic force in the liquid, D0Denotes the original density of the liquid, DjWhich represents the apparent density of the liquid when the rock sample is subjected to magnetic force in the liquid for the jth time.
The weighing unit is arranged at the end part of the lifting unit and used for weighing the weight of the rock sample, and the moving part of the lifting mechanism can move up and down along the vertical direction so as to place the rock sample in liquid for testing; liquid holds in liquid container, and liquid container places in magnetic field generating device's upper portion, can select liquid such as water, kerosene, absolute ethyl alcohol as required as measuring medium, not only does not influence the follow-up test of rock specimen, can also satisfy multiple test demand.
The rock sample is subjected to gravity and buoyancy in the liquid, the gravity is mainly determined by the mass of the rock sample, the buoyancy is mainly controlled by the total volume of the rock sample and the specific gravity of the liquid, the rock contains iron and magnetic minerals to generate magnetism, and when the rock sample and the liquid container are placed in a magnetic field, the rock sample is subjected to the acting force of the magnetic field besides the gravity and the buoyancy. Under the action of the magnetic field, the weight-increasing effect of the rock sample can be generated during weighing, and the weight-increasing effect is represented by that the mass of the rock sample is larger in the presence of the magnetic field than in the absence of the magnetic field, and is equal to that the liquid density is reduced (so called apparent density) after the magnetic field is applied, the buoyancy force applied to the rock sample is reduced, and the mass of the rock sample is increased. The total volume of the rock sample can be calculated by obtaining the weight data of the rock sample under the conditions of multiple times of different magnetic field strengths and the apparent density parameter of the liquid.
Preferably, the end of the moving member is provided with a rock sample frame, and the rock sample is arranged in the rock sample frame.
Specifically, the rock sample frame is made of non-magnetic material, and the weight G of the rock sample when the rock sample is not subjected to magnetic force in liquid and the weight is stable is obtained by removing the gravity of the rock sample frame according to the weight of the rock sample frame carrying the rock sample in the solution0And the weight G of the rock sample when subjected to a magnetic force in a liquidj。
Preferably, the processing unit calculates the raw density D of the liquid according to the following formula0：
D0＝(GC0-GC1)/VC
Wherein G isC0Represents the weight of the reference object when it is not magnetically attracted in the air, VCWhich represents the volume of the reference object,GC1the weight of the reference object when the magnetic force is not applied to the reference object in the liquid is shown.
In particular, the volume V of the referenceCAnd the weight G of the reference object in the airC0Are known, and G is based on the weight of the reference in the liquidC1Calculating the original density D of the liquid0。
More preferably, the original density D of the liquid0It can also be measured by a densitometer or the like.
Preferably, the processing unit calculates the apparent density D of the liquid according to the following formulaj：
Dj＝D0*(G-Gj)/(G-G0)
Wherein G represents the weight of the rock sample in air when the rock sample is not subjected to magnetic force in air.
By changing the intensity of the magnetic field, the apparent density D of the liquid under different magnetic field intensities is obtainedjThe mass of the rock sample in the presence of a magnetic field is greater than that in the absence of a magnetic field, which is equivalent to the reduction in liquid density after the application of a magnetic field.
Preferably, the magnetic field generating means comprises an electromagnet.
Preferably, the device further comprises a constant temperature device, the liquid container is arranged in the constant temperature device, and the constant temperature device ensures that the density of the solution is not influenced by temperature change in the measuring process.
As preferred scheme, still include the support, the support includes the crossbeam that the level set up and sets up in the perpendicular roof beam of crossbeam both sides, and the one end of lift unit sets up on the crossbeam, and the other end is equipped with the arm, and the arm can be followed vertical direction and removed.
More preferably, through the combination of the control unit and the processing unit, the control mechanical arm drives the rock sample to move synchronously, and the functions of collecting and processing the weight data of the rock sample, and calculating, displaying and storing the total volume of the rock sample are realized.
According to another aspect of the present invention, a method for determining the total volume of a rock sample is provided, the method comprising the following steps:
immersing the rock sample in liquid through a lifting unit, and weighing the rock sampleWeight G when no magnetic force is applied to the liquid and the weight is stable0；
Starting the magnetic field generating device n times, respectively applying different magnetic forces to the rock sample, and respectively weighing the weight G of the rock sample when the rock sample is subjected to the magnetic forces in the liquidj；
The total volume of the rock sample is calculated according to the following formula:
the method has the advantages that the volume of the rock sample is respectively calculated according to the weight data of the rock sample and the apparent density parameter of the liquid under the condition of different magnetic field strengths of the rock sample for n times, the total volume of the rock sample is determined in an average value calculation mode, the influence of human factors on the determination of the total volume of the rock sample is reduced, the operation is simple, convenient and rapid, the testing precision is high, the method has no special requirements on the appearance of the volume of the rock sample, and the method has wide applicability to plunger, block and granular rock samples.
Specifically, step 1: placing the rock sample in a rock sample frame, immersing the rock sample in a container filled with liquid through a lifting unit, and weighing to obtain the weight G of the rock sample when the magnetic field intensity is 00The liquid has an original density of D0；
Step 2: applying a magnetic field by a magnetic field generator; the lifting unit is immersed in a container filled with liquid and weighed to obtain the magnetic field intensity Q1Weight G of rock sample1Apparent density of the liquid is D1；
And step 3: calculating the magnetic field strength as Q1Volume V of rock sample1，V1＝(G1-G0)/(D0-D1)。
And 4, step 4: repeating the step 3 to obtain the weight information of the rock samples under the conditions of a plurality of different magnetic field strengths and different apparent densities of the liquid, and calculating the volume of the rock samples under different magnetic field strengths according to the formula in the step 3, namely: the difference between the weight of the rock sample and the density of the liquid is taken as an absolute value.
And 5: and (4) calculating the average value of the total volume data of the rock sample under the conditions of n times of different magnetic field strengths, and determining the total volume of the rock sample.
Specifically, the weight of the rock sample frame under no-load conditions is determined and recorded for later use. The rock sample basket is made of non-magnetic material, the rock sample is placed in the rock sample frame, the rock sample frame and the reference object are synchronously immersed in the liquid and weighed, the weight of the rock sample frame under no-load condition is deducted, and the weight G of the rock sample is obtained0Similarly, under the action of the magnetic field, the weight of the rock sample frame under the no-load condition also needs to be deducted to obtain the weight G of the rock sample under the action of the magnetic force in the liquidj。
Preferably, the original density D of the liquid is measured by the following procedure0：
Weighing G when reference object is not subjected to magnetic force in airC0；
Weighing G when reference object is not applied with magnetic force in liquidC1；
According to formula D0＝(GC0-GC1)/VCCalculating the original density D of the liquid0In which V isCIndicating the volume of the reference.
Volume V of referenceCAnd the weight G of the reference object in the airC0Are known and are respectively G according to the weight of a reference object in the liquidC1Calculating the original density D of the liquid0。
More preferably, the original density D0Can be measured by a densitometer or the like.
Preferably, the apparent density D of the liquid when the j th time of the rock sample is subjected to the magnetic force in the liquid is determined by the following stepsj：
Weighing the weight G of the rock sample when the rock sample is not subjected to magnetic force in the air;
according to formula Dj＝D0*(G-Gj)/(G-G0) Calculating the apparent density D of the liquid when the j time of the rock sample is subjected to magnetic force in the liquidj。
Example 1
Fig. 1 is a schematic structural diagram of a rock sample total volume measuring apparatus according to an embodiment of the present invention.
As shown in fig. 1, an embodiment provides a rock sample total volume measuring apparatus, including:
the lifting unit 2 comprises a moving component capable of moving along the vertical direction, and the tail end of the moving component is used for hanging the rock sample 5; the end part of the moving component is provided with a rock sample frame 4, and a rock sample 5 is arranged in the rock sample frame 4; the weighing unit 3 is arranged at the end part of the lifting unit 2, and is used for weighing the weight of the rock sample 5; a liquid container 7, wherein the liquid container 7 is arranged below the lifting unit 2, and the liquid container 7 is used for containing the liquid 7; and the magnetic field generating device 8 is arranged below the liquid container 7, can apply vertical downward magnetic force to the rock sample 5, can adjust the magnetic field intensity generated by the magnetic field generating device 8, and the magnetic field generating device 8 comprises an electromagnet.
The rock sample total volume measuring device also comprises a constant temperature device (not shown), and the liquid container 6 is arranged in the constant temperature device; still include support 1, support 1 includes the crossbeam that the level set up and sets up in the perpendicular roof beam of crossbeam both sides, and the one end of lift unit 2 sets up on the crossbeam, and the other end is equipped with the arm, and the arm can be followed vertical direction and removed.
A processing unit 9, wherein the processing unit 9 calculates the total volume of the rock sample according to the following formula:
wherein V represents the total volume of the rock sample, G0Represents the weight of the rock sample when it is not magnetically influenced in the liquid and the weight is stable, GjRepresenting the weight of the rock sample when the j th time is subjected to the magnetic force in the liquid, n representing the total number of measurements of the rock sample when the j th time is subjected to the magnetic force in the liquid, D0Denotes the original density of the liquid, DjWhich represents the apparent density of the liquid when the rock sample is subjected to magnetic force in the liquid for the jth time.
The processing unit calculates the original density D of the liquid according to the following formula0：
D0＝(GC0-GC1)/VC
Wherein G isC0Represents the weight of the reference object when it is not magnetically attracted in the air, VCRepresenting the volume of a reference，GC1The weight of the reference object when the magnetic force is not applied to the reference object in the liquid is shown.
The processing unit calculates the apparent density D of the liquid according to the following formulaj：
Dj＝D0*(G-Gj)/(G-G0)
Wherein G represents the weight of the rock sample in air when the rock sample is not subjected to magnetic force in air.
Example 2
As shown in fig. 1, the embodiment provides a method for determining the total volume of a rock sample, which comprises the following steps:
step 1: the rock sample 5 is immersed in the liquid by the lifting unit 2, and the weight G of the rock sample 5 when the magnetic force is not applied to the liquid and the weight is stable is measured044.72 g; kerosene was used as a measuring medium, and the density of the kerosene was 0.821g/cm3。
Step 2: starting the magnetic field generating device 8 for the 1 st time, and respectively applying magnetic field strength Q to the rock sample1And weighing the weight G of the rock sample when the magnetic force is applied to the rock sample in the liquid1＝44.80g；
Determining the apparent density D of the liquid when the rock sample is subjected to magnetic force in the liquid for the 1 st time through the following steps1：
Weighing 54.55G of rock sample 5 when the rock sample is not subjected to magnetic force in the air;
calculating the apparent density of clear water when the rock sample is subjected to magnetic force in liquid for the 1 st time:
D1＝D0*(G-G1)/(G-G0)＝0.821×(54.55-44.8g)/(54.55-44.72)＝0.8143g/cm3
and step 3: calculating the magnetic field strength as Q1Volume of rock sample at time:
V1＝(G1-G0)/(D0-D1)＝(44.8－44.72)/(0.821－0.8143)＝11.940cm3。
and 4, step 4: repeating the steps 2 to 3 to obtain the magnetic field intensity Q of the 2 nd time, the 3 rd time and the 4 th time respectively2、Q3And Q4And apparent density of liquidAre respectively D2、D3And D4Weight data G of rock sample under the conditions2、G3And G4Calculating the magnetic field intensity to be Q according to the formula in the step 32、Q3And Q4Volume V of rock sample2、V3And V4。
Applying magnetic field strength Q to the rock sample for the 2 nd time2And weighing the weight G of the rock sample when the magnetic force is applied to the rock sample in the liquid244.90 g; apparent density D of liquid when 2 nd time magnetic force is applied to the liquid2＝0.8059g/cm3Calculating the magnetic field strength as Q2Volume V of rock sample2＝11.936cm3。
Applying magnetic field strength Q to the rock sample in the 3 rd application3And weighing the weight G of the rock sample when the magnetic force is applied to the rock sample in the liquid345.00 g; apparent density D of liquid when magnetic force is applied to liquid at 3 rd time3＝0.7975g/cm3Calculating the magnetic field strength as Q3Volume V of rock sample3＝11.936cm3。
Applying magnetic field strength Q to the rock sample in the 4 th application4And weighing the weight G of the rock sample when the magnetic force is applied to the rock sample in the liquid445.09 g; apparent density D of liquid at 4 th time when magnetic force is applied to liquid4＝0.7890g/cm3Calculating the magnetic field strength as Q4Volume V of rock sample4＝11.936cm3。
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A rock sample total volume measuring device, comprising:
the lifting unit comprises a moving component capable of moving along the vertical direction, and the tail end of the moving component is used for hanging the rock sample;
the weighing unit is arranged at the end part of the lifting unit and is used for weighing the weight of the rock sample;
the liquid container is arranged below the lifting unit and is used for containing liquid;
a magnetic field generating device which is arranged below the liquid container, can apply vertical downward magnetic force to the rock sample, and can adjust the intensity of the magnetic field generated by the magnetic field generating device;
a processing unit that calculates a total volume of the rock sample according to the following formula:
wherein V represents the total volume of the rock sample, G0Represents the weight of the rock sample when it is not magnetically influenced in the liquid and the weight is stable, GjRepresenting the weight of the rock sample when the j th time is subjected to the magnetic force in the liquid, n representing the total number of measurements of the rock sample when the j th time is subjected to the magnetic force in the liquid, D0Denotes the original density of the liquid, DjWhich represents the apparent density of the liquid when the rock sample is subjected to magnetic force in the liquid for the jth time.
2. The apparatus for measuring total volume of a rock sample according to claim 1, wherein a rock sample frame is provided at an end of the moving member, and the rock sample is placed in the rock sample frame.
3. The rock sample total volume determination apparatus of claim 1, wherein the processing unit calculates an original density D of the liquid according to the following formula0：
D0＝(GC0-GC1)/VC
Wherein G isC0Represents the weight of the reference object when it is not magnetically attracted in the air, VCDenotes the volume of the reference, GC1The weight of the reference object when the magnetic force is not applied to the reference object in the liquid is shown.
4. The rock sample total volume determination apparatus of claim 3, wherein the processing unit calculates the apparent density D of the liquid according to the following formulaj：
Dj＝D0*(G-Gj)/(G-G0)
Wherein G represents the weight of the rock sample in air when the rock sample is not subjected to magnetic force in air.
5. The apparatus for measuring total volume of a rock sample according to claim 1, wherein the magnetic field generating means comprises an electromagnet.
6. The apparatus of claim 1, further comprising a thermostat, wherein the liquid container is disposed within the thermostat.
7. The rock sample total volume measuring device according to claim 1, further comprising a support, wherein the support comprises a horizontally arranged cross beam and vertical beams arranged on two sides of the cross beam, one end of the lifting unit is arranged on the cross beam, the other end of the lifting unit is provided with a mechanical arm, and the mechanical arm can move in a vertical direction.
8. A total volume of rock sample measuring method using the total volume of rock sample measuring apparatus according to any one of claims 1 to 7, comprising the steps of:
immersing the rock sample in the liquid by the lifting unit, and weighing the weight G of the rock sample when the rock sample is not subjected to magnetic force in the liquid and the weight is stable0；
Starting the magnetic field generating device n times to apply different sizes to the rock sampleMagnetic force, and respectively weighing the weight G of the rock sample when the rock sample is subjected to the magnetic force in the liquidj；
Calculating the total volume of the rock sample according to the following formula:
9. the method of claim 8, wherein the original density D of the liquid is measured by0：
Weighing G when reference object is not subjected to magnetic force in airC0；
Weighing G when reference object is not applied with magnetic force in liquidC1；
According to formula D0＝(GC0-GC1)/VCCalculating the original density D of the liquid0In which V isCIndicating the volume of the reference.
10. The method of claim 9, wherein the determination of the apparent density D of the liquid when the rock sample is subjected to the magnetic force in the liquid for the jth time is performed byj：
Weighing the weight G of the rock sample when the rock sample is not subjected to magnetic force in the air;
according to formula Dj＝D0*(G-Gj)/(G-G0) Calculating the apparent density D of the liquid when the j time of the rock sample is subjected to magnetic force in the liquidj。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115508244A (en) * | 2022-09-07 | 2022-12-23 | 江苏徐工工程机械研究院有限公司 | Interface water quality detection device and method |
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