CN110823776A - Measuring device for rock porosity - Google Patents
Measuring device for rock porosity Download PDFInfo
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- CN110823776A CN110823776A CN201911019146.XA CN201911019146A CN110823776A CN 110823776 A CN110823776 A CN 110823776A CN 201911019146 A CN201911019146 A CN 201911019146A CN 110823776 A CN110823776 A CN 110823776A
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- 239000011435 rock Substances 0.000 title claims abstract description 61
- 239000012530 fluid Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 238000004891 communication Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims description 24
- 238000011144 upstream manufacturing Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 6
- 238000012800 visualization Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 51
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000005311 nuclear magnetism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000005303 weighing 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
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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Abstract
The present disclosure relates to a measuring device for rock porosity, the measuring device comprising: a first container (1) comprising a cover (11) and a tank (12) which are separately arranged, wherein the tank defines a containing cavity and is provided with an opening (13) for rock to enter and exit the containing cavity, and the cover is used for covering the opening; the sealing element is arranged between the sealing cover and the tank body and is used for providing sealing between the sealing cover and the tank body; a drive mechanism for driving the cover to move relative to the can body and/or for driving the can body to move relative to the cover so as to selectively seal the receiving cavity by the cover and the sealing member; a second container (3) having a closed air cavity selectively in fluid communication with the receiving cavity; and a gas source (4) in fluid communication with the gas cavity for selectively charging the gas into the gas cavity. Through the technical scheme, the measuring equipment can facilitate the filling of rocks and simultaneously ensure the air tightness of the measuring equipment.
Description
Technical Field
The present disclosure relates to the field of rock porosity measurement, in particular to a measuring device for rock porosity.
Background
Rock porosity is the ratio of the sum of all pore space volumes in a rock sample (rock sample) to the volume of the rock sample, is one of the most basic physical parameters for describing rock pore characteristics, and is widely applied to reservoir evaluationIn (1). The measurement method of rock porosity includes various methods such as saturation weighing, nuclear magnetism measurement, and gas measurement. In the related art, the principle underlying gas measurement is Boyle's law, i.e., when the temperature is constant, the volume of a mass of an ideal gas is inversely proportional to its absolute pressure, i.e., P1V1＝P2V2. However, in actual measurement, there are problems that the filling of rocks is inconvenient and the airtightness of a container for holding rocks is not good, thereby reducing the measurement efficiency and affecting the accuracy of the porosity of rocks.
Disclosure of Invention
The utility model aims at providing a measuring equipment for rock porosity, this measuring equipment can make things convenient for the packing of rock when realizing rock porosity measurement, guarantees the gas tightness of self.
To achieve the above object, the present disclosure provides a measuring apparatus for rock porosity, the measuring apparatus comprising:
a first container comprising a cover and a tank body which are arranged in a split manner, wherein the tank body defines a containing cavity and is provided with an opening for rock to enter and exit the containing cavity, and the cover is used for covering the opening;
a seal disposed between the lid and the can for providing a seal between the lid and the can;
a drive mechanism for driving the closure to move relative to the can and/or for driving the can to move relative to the closure to selectively close the receiving cavity with the closure and the seal;
a second container having a closed air cavity selectively in fluid communication with the receiving cavity; and
a gas source in fluid communication with the gas cavity for selectively charging gas into the gas cavity.
Optionally, the measuring apparatus further comprises a support to which the cover is fixed, and the drive mechanism is mounted to the support to drive the can to move relative to the cover.
Optionally, the driving mechanism comprises an actuating device and a transmission device, and the actuating device is in transmission connection with the tank body through the transmission device;
optionally, the transmission device is configured as a lead screw transmission structure and comprises a nut and a lead screw which are matched with each other, the nut is fixed on the bracket, the tank body is connected to a first end of the lead screw, and the actuating device is connected to a second end of the lead screw;
optionally, the actuation device is configured as an actuation handle;
optionally, the actuating handle is configured as a rod extending substantially perpendicular to the screw.
Optionally, the tank is disposed below the cover, and the lead screw extends in a vertical direction, the first end of the lead screw is formed with a mounting table on which a supporting surface and a limiting boss protruding from the supporting surface are configured, the tank is formed with a positioning groove, the tank is supported on the supporting surface, and the positioning groove is matched with the limiting boss.
Optionally, the nut is configured as a T-shaped structure including a large diameter section and a small diameter section with a step surface formed therebetween, the nut is received in a T-shaped groove formed on the bracket, and the large diameter section is located at an upper side of the small diameter section.
Optionally, the can has an end face for mating with the closure, the end face being formed with a groove surrounding the opening, the seal being configured as a sealing ring and received in the annular groove, and the sealing ring having a height greater than the depth of the annular groove.
Optionally, the measurement apparatus comprises a tubing system for establishing fluid communication between the gas source, the first container and the second container, the pipeline system comprises a main pipeline, a first branch pipeline and a second branch pipeline, the upstream end of the main pipeline is connected with the gas source, the first container is connected to a downstream end of the first branch line, the second container is connected to a downstream end of the second branch line, an upstream end of the first branch conduit and an upstream end of the second branch conduit are connected in parallel to a downstream end of the main conduit, the piping system includes a first on-off valve for opening or closing fluid communication between the first container and the second container and the gas source and opening or closing fluid communication between the first container, the second container and the gas source and the outside atmosphere.
Optionally, the pipeline system comprises an unloading valve, a flow regulating valve, a second switch valve and a pressure reducing valve,
the unloading valve is connected to the main pipeline through a third branch pipeline, the third branch pipeline is connected with the first branch pipeline and the second branch pipeline in parallel and is positioned at the upstream of the first branch pipeline and the second branch pipeline, and the unloading valve is used for enabling the main pipeline to be communicated with the outside atmosphere when the pressure in the main pipeline is greater than a preset value;
the flow regulating valve, the second switch valve and the pressure reducing valve are all arranged in the main pipeline,
the second on-off valve and the pressure reducing valve are located upstream of the unloading valve, the flow regulating valve is located downstream of the unloading valve,
the second switch valve is arranged at the upstream end of the main pipeline, and the reducing valve is arranged at the downstream of the second switch valve.
Optionally, the periphery of the first container is wrapped with a heat insulation layer, and the periphery of the second container is wrapped with a heat insulation layer.
Optionally, the measuring device further comprises a data acquisition system, the data acquisition system comprises a pressure sensor for detecting the pressure in the second container and a temperature sensor for detecting the temperature in the second container, and data acquired by the pressure sensor and the temperature sensor in real time can be displayed on the visualization terminal.
According to the technical scheme, the sealing cover and the tank body are arranged in a split mode, so that rock can be conveniently filled, the driving mechanism can drive the sealing cover to move relative to the tank body, and/or the tank body is driven to move relative to the sealing cover, so that the containing cavity is sealed through the sealing cover and the sealing piece, good sealing of the containing cavity in the first container is guaranteed, and therefore the driving mechanism can open the opening to fill the rock and seal the containing cavity; during the measurement, the air cavity is known with the volume that holds the chamber, it is airtight to make the chamber of holding, the air cavity fluid intercommunication of air supply and second container, the air cavity with hold chamber disconnection fluid intercommunication, then can obtain the pressure of air cavity in the second container, afterwards, make air supply and air cavity disconnection fluid intercommunication, make the air cavity with hold chamber fluid intercommunication, then can obtain the holistic pressure of air cavity and chamber of holding, thereby reachs the porosity of this rock through the conversion, promptly, this measuring equipment can make things convenient for filling of rock when realizing rock porosity measurement, guarantee the gas tightness of self.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic structural diagram of a measurement device for rock porosity provided in accordance with an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a driving mechanism in a measuring device for rock porosity provided according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a tank in the measuring device for rock porosity provided according to the embodiment of the disclosure;
FIG. 4 is a schematic structural diagram of a cover in a measuring device for rock porosity provided according to an embodiment of the present disclosure;
fig. 5 is a gas path schematic diagram of a measuring device for rock porosity provided according to an embodiment of the present disclosure.
Description of the reference numerals
1-a first container, 11-a sealing cover, 12-a tank body, 121-a positioning groove, 122-an annular groove, 13-an opening, 2-a support, 21-an upper mounting plate, 22-a lower mounting plate, 23-a side plate, 24-a base, 3-a second container, 4-an air source, 41-a main pipeline, 42-a first branch pipeline, 43-a second branch pipeline, 44-a third branch pipeline, 51-a nut, 52-a screw rod, 53-an execution handle, 54-a mounting table, 541-a supporting surface, 542-a limiting boss, 61-a first switch valve, 62-an unloading valve, 63-a flow regulating valve, 64-a second switch valve, 65-a pressure reducing valve, 71-a pressure sensor and 72-a temperature sensor.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise stated, the terms of orientation such as "upper, lower" and "are defined based on fig. 1, and specifically refer to the drawing direction of fig. 1," inner and outer "refer to the inner and outer of the contour of each component, and" upstream and downstream "are defined based on the sequence of gas circulation. The terms "first," "second," and the like, are used herein to distinguish one element from another, and are not intended to be sequential or important. Moreover, in the following description, when referring to the figures, the same reference numbers in different figures designate the same or similar elements unless otherwise indicated.
According to the specific embodiment of the present disclosure, a measuring device for rock porosity is provided, one example of which is shown in fig. 1 to 4, and referring to fig. 1 and 3, the measuring device comprises a first container 1, a sealing member, a second container 3, a driving mechanism and a gas source 4, the first container 1 comprises a cover 11 and a tank 12 which are separately arranged, the tank 12 defines a containing cavity and is provided with an opening 13, the opening 13 is used for rock to enter and exit the containing cavity, and the cover 11 is used for covering the opening 13; a sealing member is provided between the lid 11 and the can 12 for providing a seal between the lid 11 and the can 12; a driving mechanism for driving the cover 11 to move relative to the can body 12, and/or for driving the can body 12 to move relative to the cover 11 so as to selectively seal the accommodating cavity by the cover 11 and the sealing member; a second container 3 having a closed air chamber selectively in fluid communication with the receiving chamber; a gas source 4 is in fluid communication with the gas cavity for selectively charging the gas into the gas cavity.
Through the technical scheme, in the measuring equipment for the rock porosity provided by the disclosure, the sealing cover 11 and the tank body 12 are arranged in a split manner, so that rock can be conveniently filled, the driving mechanism can drive the sealing cover 11 to move relative to the tank body 12, and/or the tank body 12 is driven to move relative to the sealing cover 11, so that the containing cavity is sealed through the sealing cover 11 and the sealing piece, and good sealing of the containing cavity in the first container 1 is ensured, so that the driving mechanism can realize that the opening 13 is opened to fill the rock, and the opening 13 is sealed to seal the containing cavity; during the measurement, the air cavity is known with the volume that holds the chamber, it is airtight to make the chamber of holding, air supply 4 and second container 3's air cavity fluid intercommunication, air cavity and chamber of holding disconnection fluid intercommunication, then can derive the pressure of air cavity in the second container 3, afterwards, make air supply 4 and air cavity disconnection fluid intercommunication, make air cavity and chamber of holding fluid intercommunication, then can derive the holistic pressure of air cavity and chamber of holding, thereby derive the porosity of this rock through the conversion, namely, this measuring equipment can make things convenient for filling of rock when realizing rock porosity measurement, guarantee the gas tightness of self. For example, according to one embodiment, the volume for containing gas in the second container 3 is set to V1The volume of the first container 1 for containing gas without rock being inserted is V2The volume for containing gas is V2Is internally used for containing rocks with a total volume V0Total volume of solid and liquid of rock is V3The porosity of the rock is
Now V1、V2And V0In known amounts. During measurement, the pressure P in the second container 3 can be measured by connecting the gas source 4 with the gas cavity in a fluid manner and disconnecting the gas cavity from the accommodating cavity in the fluid manner1Then, the gas source 4 is disconnected from the gas cavity and the gas cavity is communicated with the accommodating cavity, so that the pressure P of the whole body of the gas cavity and the accommodating cavity can be measured2Thus, passing P1V1＝P2(V1+V2-V3) Can be converted intoGo out V3By passingThen it can be converted to
That is, the measuring device is capable of measuring the resulting rock porosity
Here, the initial pressure of the air chamber and the accommodating chamber may be atmospheric pressure, and a reading of a measuring member such as a pressure sensor for measuring the pressure of the air chamber and the accommodating chamber at atmospheric pressure is zero, and the above-mentioned P1And P2The reading of the pressure sensor may be taken.
It should be noted that the present disclosure is not limited to the specific moving direction of the cover 11 and/or the can 12, and the present disclosure will be described in detail in the following embodiments. The opening 13 may be formed at any position of the first container 1. In addition, the specific structure of the above-described drive mechanism is not limited by the present disclosure, which will be described in detail in the following embodiments. In addition, the second container 3 may be integrally disposed, or may be formed in a form that a lid and a can body which are separately disposed are driven by a driving mechanism to form a closed air chamber, which is not limited in the present disclosure.
According to an embodiment of the present disclosure, referring to fig. 1, the measuring apparatus may further include a bracket 2, the cover 11 is fixed to the bracket 2, and a driving mechanism is mounted to the bracket 2 to drive the can 12 to move relative to the cover 11. Like this, the power waste can be avoided to stationary closing cap 11, also can improve the leakproofness between closing cap 11 and the jar body 12 simultaneously under the circumstances that closing cap 11 is stationary, avoids the phenomenon that the two produced sealed badly under the circumstances that all remove, and simultaneously, support 2 can play the effect of installation closing cap 11 and actuating mechanism, guarantees the stability of closing cap 11 and actuating mechanism installation. Of course, the can 12 of the present disclosure may also be fixed to the bracket 2, and the driving mechanism can drive the cover 11 to move relative to the can 12. The present disclosure will be described in detail by taking the former as an example only.
Alternatively, referring to fig. 1 and 2, the driving mechanism includes an actuating device and a transmission device, the actuating device is in transmission connection with the can 12 through the transmission device, so that the actuating device can provide power for the movement of the can 12, and the transmission device can transmit the power transmitted by the actuating device to the can 12, thereby realizing the movement of the can 12 relative to the cover 11.
Alternatively, referring to fig. 1 and 2, the transmission means may be configured as a lead screw transmission structure including a nut 51 and a lead screw 52 which are engaged with each other, the nut 51 being fixed to the bracket 2, the can 12 being connected to a first end of the lead screw 52, and the actuating means being connected to a second end of the lead screw 52, so that the power of the actuating means can be transmitted to the can through the nut 51 and the lead screw 52 which are engaged with each other, providing accuracy in the movement of the can 12 relative to the closure 11. Here, the tank 12 may be fixedly connected to the first end of the screw rod 52 to ensure that no shaking occurs during the movement of the tank 12, or detachably connected to the first end of the screw rod 52 to facilitate detachment, thereby facilitating the replacement of the rock sample, the replacement of the body of the tank 12, and the like. Of course, the transmission device of the present disclosure can also be configured in various forms such as a slide rail, a rack and pinion, and a worm gear, and the present disclosure is not limited thereto.
Alternatively, referring to FIGS. 1 and 2, the actuator is configured as an actuating handle 53, such that a measuring person can move the can 12 relative to the closure 11 by manually rotating the actuating handle 53, eliminating the cost of using an electric motor or other power source, while also simplifying the drive mechanism.
Alternatively, referring to fig. 1 and 2, the actuating handle 53 may be configured in a rod shape, the actuating handle 53 extending substantially perpendicular to the lead screw 52. Thus, the operation and the power application of experimenters can be facilitated.
It should be noted that the term "substantially" as used in this disclosure is intended to mean a non-strict limitation, for example, "the actuation handle 53 extends substantially perpendicular to the lead screw 52" can be understood as: due to objective factors such as manufacturing errors and mounting errors, the actual extending direction of the actuating handle 53 and the extending direction perpendicular to the screw rod 52 have a certain small included angle, for example, 0 ° to 5 °, within which the actuating handle 53 is still considered to extend perpendicular to the screw rod 52. The term "substantially" is used to allow a range of offsets to accommodate objective factors such as manufacturing tolerances and installation tolerances. The following description, when referring to the word "substantially", is meant to be non-limiting in meaning and will not be repeated in this disclosure.
According to some embodiments, referring to fig. 1 to 3, the can 12 may be disposed under the cover 11, and the lead screw 52 extends in a vertical direction, that is, the can 12 is movable in the vertical direction with respect to the cover 11, a first end of the lead screw 52 is formed with a mounting table 54, the mounting table 54 is configured with a supporting surface 541 and a limit boss 542 protruding from the supporting surface 541, the can 12 is formed with a positioning groove 121, the can 12 is supported on the supporting surface 541 and the positioning groove 121 is engaged with the limit boss 542. In this way, the lead screw 52 can support the can body 12 through the supporting surface 541, the positioning groove 121 and the limiting boss 542 can be matched to provide positioning for the can body 12, and it is ensured that the central axis of the can body 12 and the central axis of the cover 11 can be always approximately overlapped, so that the can body 12 is ensured not to be deviated relative to the cover 11. Here, the can 12 can be detached from the lead screw 52.
It should be noted that the lead screw 52 may also extend along the left-right direction in fig. 1, and may also extend along any direction in space, so that the can body 12 can move relative to the cover 11 along any direction to be in sealing engagement with the cover 11, and the present disclosure is only exemplified by the lead screw 52 extending along the vertical direction.
According to some embodiments, referring to fig. 1 to 2, the nut 51 may be configured in a T-shaped structure including a large diameter section and a small diameter section with a stepped surface formed therebetween, the nut 51 being received in a T-shaped groove formed on the bracket 2 with the large diameter section located at an upper side of the small diameter section. Like this, the step face that forms between big footpath section and the path section can be pressed on the step face in T shape groove, can guarantee that screw 51 self can not take place the displacement for support 2, guarantees the seal that holds the chamber in the experimentation, and screw 51 self installation is also more stable simultaneously.
According to an embodiment of the present disclosure, referring to fig. 1, 3 and 4, the can body 12 has an end surface for mating with the closure 11, the end surface being formed with an annular groove 122 surrounding the opening, the sealing member being configured as a sealing ring and being received in the annular groove 122, and the sealing ring having a height greater than a depth of the annular groove 122. In this way, when sealing the receiving chamber, the drive mechanism presses the sealing ring against the cover 11, which enables the receiving chamber, i.e. the first container 1, to be sealed. Here, referring to fig. 4, the sealing ring may be pressed on the lower end surface of the sealing cap 11, and may also be pressed on the inner end surface of the sealing cap 11, which is not limited by the present disclosure.
According to an embodiment of the present disclosure, and with reference to what is shown in fig. 5, the measuring device comprises a pipe system for establishing fluid communication between the gas source 4 and the first and second containers 1, 3, the pipeline system comprises a main pipeline 41, a first branch pipeline 42 and a second branch pipeline 43, wherein the upstream end of the main pipeline 41 is connected with an air source 4, a first container 1 is connected with the downstream end of the first branch pipeline 42, a second container 3 is connected with the downstream end of the second branch pipeline 43, the upstream end of the first branch pipeline 42 and the upstream end of the second branch pipeline 43 are connected with the downstream end of the main pipeline 41 in parallel, the pipeline system comprises a first switch valve 61, and the first switch valve 61 is used for opening or closing fluid communication among the first container 1, the second container 3 and the air source 4 and the outside atmosphere. Thus, the gas in the gas source 4 can firstly enter the second container 3 through the main pipeline 41 and the second branch pipeline 43, at this time, the first switch valve 61 can close the fluid communication between the first container 1 and the second container 3 and the gas source 4 and close the fluid communication between the first container 1, the second container 3 and the gas source 4 and the external atmosphere, then the measuring personnel can cut off the fluid communication between the gas source 4 and the gas cavity, for example, the second switch valve 64 is realized, the first switch valve 61 can open the fluid communication between the first container 1 and the second container 3, that is, the first container 1 and the second container 3 are in fluid communication through the main pipeline 41 and the second branch pipeline 43 and the first branch pipeline 42, and the first switch valve 61 closes the fluid communication between the first container 1, the second container 3 and the gas source 4 and the external atmosphere, thereby realizing the measurement of the rock porosity, after the measurement is completed, the first on-off valve 61 can open the fluid communication between the first container 1, the second container 3 and the gas source 4 and the external atmosphere, so as to discharge the gas in the first container 1, the second container 3 and the pipeline system to the atmosphere, i.e. to relieve the pressure.
Alternatively, the first switch valve 61 may be a ball valve, and the valve of the ball valve may be designed as a three-phase valve, for example, when the pressure in the first container 1, the second container 3 and the pipeline system is removed, the first container 1 may be firstly communicated with the external atmosphere by fluid, the pressure of the first container 1 is removed, then the sample is taken out by separating the cover 11 from the tank 12, at this time, the first branch pipeline 42 is exposed to the atmosphere, then the first container 1 is communicated with the second container 3 by fluid, at this time, the second container 3 can be communicated with the external atmosphere by fluid through the first branch pipeline 42, so as to remove the pressure of the second container 3 and the pipeline system, which is not limited by the present disclosure. Here, the first switch valve 61 may be connected to the external atmosphere through a hose, so that the pressure relief speed is reduced, and the main pipeline 41 is protected.
According to some embodiments, with reference to what is shown in fig. 5, the piping system comprises an unloading valve 62, a flow regulating valve 63, a second on-off valve 64 and a pressure reducing valve 65, the unloading valve 62 being connected to the main piping 41 by a third branch piping 44, the third branch piping 44 being parallel to the first branch piping 42 and the second branch piping 43 and being located upstream of the first branch piping 42 and the second branch piping 43, the unloading valve 62 being intended to put the main piping 41 in communication with the outside atmosphere when the pressure inside the main piping 41 is greater than a preset value; a flow rate regulating valve 63, a second on-off valve 64, and a pressure reducing valve 65 are provided in the main line 41, the second on-off valve 64 and the pressure reducing valve 65 are located upstream of the unloading valve 62, the flow rate regulating valve 63 is located downstream of the unloading valve 62, the second on-off valve 64 is provided at the upstream end of the main line 41, and the pressure reducing valve 65 is provided downstream of the second on-off valve 64. In this way, it is possible to avoid, by means of the unloading valve 62, that the pressure inside the second tank 3 is too great, which could cause damage to the second tank 3 and to the pressure sensor 71 described below, or even cause safety accidents, said preset value not exceeding 110psi (1bar ≈ 14.5psi) according to one embodiment; the flow regulating valve 63 is arranged at the downstream of the unloading valve 62, so that the self damage caused by too large air pressure can be avoided, meanwhile, the flow regulating valve 63 can regulate the flow of the gas in the main pipeline 41 to the second container 3, and the gas flow speed is prevented from being too high; the second on-off valve 64 is used for opening or closing the fluid communication between the second container 3 and the gas source 4; the pressure reducing valve 65 is used to regulate the pressure level to the second container 3, wherein, according to one embodiment, when the first on-off valve 61 is closed and the second on-off valve 64 is opened, the pressure reducing valve can control the pressure in the second container 3 to be in the range of 60-70 psi (1bar ≈ 14.5 psi).
Alternatively, the flow rate adjustment valve 63 may be a needle valve.
According to the specific embodiment of the present disclosure, the outer periphery of the first container 1 is wrapped with a heat insulating layer, and the outer periphery of the second container 3 is wrapped with a heat insulating layer. Therefore, the temperature of the accommodating cavity in the first container 1 and the temperature of the air cavity in the second container 3 are guaranteed not to change through the heat insulation layer, and therefore the inaccuracy of experimental data caused by temperature change is avoided. According to one embodiment, the insulation layer may be made of a heat absorbing sponge.
According to one embodiment, the second container 3 may be provided with a temperature sensor 72 for detecting the temperature of the internal air cavity, the temperature sensor 72 being at P above1And P2Respectively correspond to temperature readings T1And T2If above T1And T2Is greater than the allowable difference, the measurer can pass through P1V1T2＝P2T1(V1+V2-V3) Correction V3If the above-mentioned calculated value of T1And T2Is less than the allowable difference, the measurement staff can pass through P1V1＝P2(V1+V2-V3) Calculate to obtain V3。
According to the specific embodiment of the present disclosure, referring to fig. 5, the measuring apparatus further includes a data acquisition system, the data acquisition system includes a pressure sensor 71 for detecting the pressure in the second container 3 and a temperature sensor 72 for detecting the temperature in the second container 3, and the data acquired by the pressure sensor 71 and the temperature sensor 72 in real time can be displayed on the visualization terminal. In this way, the data of the pressure sensor 71 and the temperature sensor 72 can be acquired in real time through the visual terminal, so that the reduction of the measurement efficiency caused by manual recording of a measurer is avoided, and the accuracy of experimental data can be further ensured. Here, the visualization terminal may be a computer.
Here, the present disclosure will describe the measurement process in detail, first, before the measurement starts, a measurer takes the tank 12 off the screw rod 52 and loads the tank into the rock through the opening 13, then the positioning groove 121 is matched with the limiting boss 542 to complete the positioning matching of the tank 12 and the screw rod 52, the measurer rotates the actuating handle 53 to drive the tank to move upwards until the tank 12 cannot move upwards, then, an operator closes the first switch valve 61, opens the second switch valve 64, and adjusts the pressure reducing valve 65 and the flow regulating valve 63 to make the reading of the pressure sensor 71 be 60-70 psi, at this time, the computer is opened, and when the reading of the pressure sensor 71 is stable, the reading is recorded as P1At this time, the second on-off valve 64 is closed, the first on-off valve 61 is opened and the air chamber is in fluid communication with the accommodating chamber, at this time, the reading of the pressure sensor 71 is gradually changed, and when the reading of the pressure sensor 71 is stabilized, the reading is recorded as P2At this time, the pressure in the first container 1 is released by the first on-off valve 61, the actuator handle 53 is rotated again to take out the sample, the second on-off valve 64 is opened to allow the first container 1 and the second container 3 to be in fluid communication again, and the unloading valve 62 is opened until the reading of the pressure sensor 71 becomes zero, at which time, the measurement is terminated. Comparison of the above T1And T2Whether the difference value of (c) is within the allowable range, by the above formula P1V1＝P2(V1+V2-V3) Or P1V1T2＝P2T1(V1+V2-V3) And
the porosity of the rock can be calculated
According to an embodiment of the present disclosure, referring to fig. 1, the tank 12 is moved in an up-down direction, the bracket 2 of the present disclosure may include an upper mounting plate 21 and a lower mounting plate 22 which are spaced apart from each other in an up-down direction, wherein the upper mounting plate is used to fix the cover 11, and referring to fig. 4, the cover 11 may have a threaded hole, the cover may be fixedly connected to the upper mounting plate 21 by a fastening member, and the cover 11 may have an air hole for fluid communication with the first branch pipe 42, and the lower mounting plate 22 may have the above-mentioned T-shaped groove formed therein, and the nut 51 may be fixed therein. In addition, the support 2 can also include a side plate 23 and a base 24, wherein the side plate 23 can be two blocks which are arranged at left and right intervals in the direction of fig. 1, the side plate is used for fixing the upper mounting plate 21 and the lower mounting plate 22, and the side plate 23 is fixed on the reading frame 24, so that the stability of the support 2 is improved through the base 24, and the support 2 is prevented from shaking.
According to one embodiment of the present disclosure, the gas in the gas source may be helium, which is inert in nature, so that the gas source is safe, and has small molecules, and can sufficiently enter the pores of the rock, thereby improving the measurement accuracy.
Optionally, the measuring device of the present disclosure may further include an explosion-proof cabinet, and helium gas is stored in a gas cylinder placed inside the explosion-proof cabinet, thereby further improving the safety of the experiment.
Optionally, the bottom of the gas cylinder can be provided with a lightning arrester plate, so that static electricity generated during the placement process of the gas cylinder can be removed.
According to one embodiment of the present disclosure, the accommodating cavity of the first container 1 and the air cavity of the second container 3 may be filled with a filler, such as a short cylinder, so as to avoid an increase error caused by an excessively small volume occupied by rocks in the accommodating cavity or an uneven air intake speed.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A measuring device for rock porosity, characterized in that the measuring device comprises:
a first container (1) comprising a cover (11) and a tank body (12) which are arranged in a split manner, wherein the tank body (12) defines a containing cavity and is provided with an opening (13), the opening (13) is used for allowing rocks to enter or exit the containing cavity, and the cover (11) is used for covering the opening (13);
a seal disposed between the lid (11) and the can (12) for providing a seal between the lid (11) and the can (12);
-a drive mechanism for driving the cover (11) in movement relative to the can (12) and/or for driving the can (12) in movement relative to the cover (11) to selectively close the containment chamber by the cover (11) and the seal;
a second container (3), the second container (3) having a closed air cavity selectively in fluid communication with the receiving cavity; and
a gas source (4) in fluid communication with the gas cavity for selectively charging the gas cavity with gas.
2. A measuring device for rock porosity according to claim 1, further comprising a support (2), the cover (11) being fixed to the support (2), the drive mechanism being mounted to the support (2) to drive the canister (12) to move relative to the cover (11).
3. The apparatus for measuring porosity of rock according to claim 2, wherein the drive mechanism comprises an actuating device and a transmission device, the actuating device being in driving connection with the tank (12) through the transmission device;
optionally, the transmission device is configured as a lead screw transmission structure and comprises a nut (51) and a lead screw (52) which are matched with each other, the nut (51) is fixed on the bracket (2), the tank body (12) is connected to a first end of the lead screw (52), and the actuating device is connected to a second end of the lead screw (52);
optionally, the actuating means is configured as an actuating handle (53);
optionally, the actuating handle (53) is configured in the form of a rod extending substantially perpendicularly to the spindle (52).
4. A measuring device for rock porosity according to claim 3, wherein the canister (12) is disposed below the cover (11) and the screw (52) extends in a vertical direction, the first end of the screw (52) is formed with a mounting table (54), the mounting table (54) is configured with a support surface (541) and a limit projection (542) projecting from the support surface (541), the canister (12) is formed with a positioning groove (121), the canister (12) is supported on the support surface (541) and the positioning groove (121) is engaged with the limit projection (542).
5. The apparatus for measuring porosity of rock according to claim 3, wherein the nut (51) is constructed in a T-shaped structure including a large diameter section and a small diameter section with a stepped surface formed therebetween, the nut (51) is received in a T-shaped groove formed on the holder (2), and the large diameter section is located at an upper side of the small diameter section.
6. The apparatus for measuring the porosity of rocks according to claim 1, characterized in that the pot (12) has an end face for cooperating with the cover (11), which end face is formed with an annular groove (122) surrounding the opening (13), the seal is configured as a sealing ring and is accommodated in the annular groove (122), and the height of the sealing ring is greater than the depth of the annular groove (122).
7. The measurement device for rock porosity according to claim 1, comprising a piping system for establishing fluid communication between the gas source (4), the first container (1) and the second container (3), the piping system comprising a main pipe (41), a first branch pipe (42) and a second branch pipe (43), an upstream end of the main pipe (41) being connected with the gas source (4), the first container (1) being connected to a downstream end of the first branch pipe (42), the second container (3) being connected to a downstream end of the second branch pipe (43), an upstream end of the first branch pipe (42) and an upstream end of the second branch pipe (43) being connected in parallel to a downstream end of the main pipe (41), the piping system comprising a first on-off valve (61), the first switch valve (61) is used for opening or closing the fluid communication between the first container (1) and the second container (3) and the gas source (4) and opening or closing the fluid communication between the first container (1), the second container (3) and the gas source (4) and the external atmosphere.
8. The measurement device for rock porosity according to claim 7, wherein the piping system comprises an unloading valve (62), a flow regulating valve (63), a second on-off valve (64), and a pressure reducing valve (65),
the unloading valve (62) is connected to the main pipeline (41) through a third branch pipeline (44), the third branch pipeline (44) is connected with the first branch pipeline (42) and the second branch pipeline (43) in parallel and is located at the upstream of the first branch pipeline (42) and the second branch pipeline (43), and the unloading valve (62) is used for enabling the main pipeline (41) to be communicated with the outside atmosphere when the pressure in the main pipeline (41) is greater than a preset value;
the flow rate regulating valve (63), the second switching valve (64), and the pressure reducing valve (65) are all provided in the main line (41),
the second on-off valve (64) and the pressure reducing valve (65) are located upstream of the unloading valve (62), the flow regulating valve (63) is located downstream of the unloading valve (62),
the second on-off valve (64) is provided at an upstream end of the main line (41), and the pressure reducing valve (65) is provided downstream of the second on-off valve (64).
9. The apparatus for measuring porosity of rock according to claim 1, wherein the outer periphery of the first container (1) is wrapped with a thermal insulation layer and the outer periphery of the second container (3) is wrapped with a thermal insulation layer.
10. The measuring device for rock porosity according to claim 1, further comprising a data acquisition system comprising a pressure sensor (71) for detecting the pressure inside the second container (3) and a temperature sensor (72) for detecting the temperature inside the second container (3), the data acquired by the pressure sensor (71) and the temperature sensor (72) in real time being displayable on a visualization terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911019146.XA CN110823776A (en) | 2019-10-24 | 2019-10-24 | Measuring device for rock porosity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911019146.XA CN110823776A (en) | 2019-10-24 | 2019-10-24 | Measuring device for rock porosity |
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| CN110823776A true CN110823776A (en) | 2020-02-21 |
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| CN105757235A (en) * | 2016-05-16 | 2016-07-13 | 江苏久维压力容器制造有限公司 | Tank cover compression type pressure container |
| CN105805309A (en) * | 2016-05-16 | 2016-07-27 | 江苏久维压力容器制造有限公司 | Dual compression pressure vessel with two cover bodies |
| CN205958423U (en) * | 2016-07-08 | 2017-02-15 | 东营市华恩石油科技有限公司 | Well logging rock core porosity device |
| CN206339467U (en) * | 2016-08-23 | 2017-07-18 | 重庆泛嘉晟禾工程技术检测有限公司 | Core porosity measurement apparatus |
| CN108982333A (en) * | 2018-10-18 | 2018-12-11 | 四川富利斯达石油科技发展有限公司 | A kind of gas survey core porosity device |
| CN110107688A (en) * | 2019-05-17 | 2019-08-09 | 江苏久维压力容器制造有限公司 | Cover compression type pressure vessel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105757235A (en) * | 2016-05-16 | 2016-07-13 | 江苏久维压力容器制造有限公司 | Tank cover compression type pressure container |
| CN105805309A (en) * | 2016-05-16 | 2016-07-27 | 江苏久维压力容器制造有限公司 | Dual compression pressure vessel with two cover bodies |
| CN205958423U (en) * | 2016-07-08 | 2017-02-15 | 东营市华恩石油科技有限公司 | Well logging rock core porosity device |
| CN206339467U (en) * | 2016-08-23 | 2017-07-18 | 重庆泛嘉晟禾工程技术检测有限公司 | Core porosity measurement apparatus |
| CN108982333A (en) * | 2018-10-18 | 2018-12-11 | 四川富利斯达石油科技发展有限公司 | A kind of gas survey core porosity device |
| CN110107688A (en) * | 2019-05-17 | 2019-08-09 | 江苏久维压力容器制造有限公司 | Cover compression type pressure vessel |
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