CN215218688U - Temperature-variable pressure ultrasonic rock core measuring device - Google Patents
Temperature-variable pressure ultrasonic rock core measuring device Download PDFInfo
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- CN215218688U CN215218688U CN202121197431.3U CN202121197431U CN215218688U CN 215218688 U CN215218688 U CN 215218688U CN 202121197431 U CN202121197431 U CN 202121197431U CN 215218688 U CN215218688 U CN 215218688U
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Abstract
The utility model provides a variable temperature pressure ultrasonic wave rock core measuring device, include: a hooke's cavity, comprising: the first cover cap and the second cover cap are arranged at two ends of the cavity; a side opening is formed in the cavity, a first opening is formed in the first cover cap, and a second opening is formed in the second cover cap; the side opening is communicated with the first hydraulic pump; the rubber sleeve is arranged between the Hooke cavity and the core sample; the first die pressing head is partially inserted into the first opening, and a first probe is arranged on the first die pressing head; the second die pressing head is partially inserted into the second opening, and a second probe is arranged on the second die pressing head; the heating mechanism is used for heating the hooke cavity; the temperature sensor is used for measuring the heating temperature of the heating mechanism to the hooke cavity; the pulse transmitter is used for transmitting a pulse electric signal to the rock core sample; and the oscilloscope is used for picking up the pulse electric signal after the pulse electric signal is transmitted by the core sample. The utility model discloses use easy operation, with low costs, measurement accuracy is high.
Description
Technical Field
The utility model relates to an exploration geophysical technical field especially relates to a alternating temperature pressure ultrasonic wave rock core measuring device.
Background
A common method for determining the stress direction of the oil field in the current field during the core sound velocity experiment. After the full-size core is drilled, the anisotropy of stress unloading of the full-size core leads to the anisotropy of sound velocity, and the direction of the horizontal maximum stress and the horizontal minimum stress can be determined by using the principle.
At present, in a core sound velocity experiment, the application of an ultrasonic measurement technology tends to be mature, and the measurement technology mainly utilizes a transmission method and a reflection method for measurement. The core is affected by a certain temperature and pressure in the stratum, and if a laboratory needs to simulate a real reservoir environment and measure the elastic parameter change of a rock sample (including the speed of ultrasonic waves, the density of the rock sample, the Young modulus and the like), a plurality of instruments with complex operation and high cost need to be introduced. The maintenance costs of these subsequently introduced costly instruments are also very high. However, if these instruments with complicated operation and high cost are not introduced, the experimental accuracy cannot be guaranteed.
In the prior art, chinese patent CN204359752U discloses a full-diameter core wave velocity anisotropy test apparatus, which includes a sound wave transmitter-receiver, an oscilloscope, a sound wave probe, and a pad block, wherein the sound wave transmitter-receiver is respectively connected to the sound wave probe and the oscilloscope, and the two sound wave probes are in contact with the circumferential side surface of the core through the pad block along the diameter direction of the core. However, the test device does not actually simulate the environment of the rock core, and the measurement precision and the like are not high.
Therefore, it is necessary to provide a set of temperature and pressure changing ultrasonic core measuring device with simple operation, low cost and high precision, which is used for measuring the ultrasonic longitudinal wave and transverse wave velocities of rock samples under different pressure and temperature conditions.
It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention, and is set forth for facilitating understanding of those skilled in the art. These solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present invention.
SUMMERY OF THE UTILITY MODEL
In order to overcome at least one defect among the prior art, the utility model provides a variable temperature pressure ultrasonic wave rock core measuring device, easy operation, low cost, precision are high for under measuring different pressure and temperature condition, the supersound longitudinal wave of rock sample, shear wave speed.
In order to achieve the above object, the present invention provides the following technical solutions.
The utility model provides a variable temperature pressure ultrasonic wave rock core measuring device, variable temperature pressure ultrasonic wave rock core measuring device includes:
the Hooke cavity is used for providing external protection for the rock core; the hooke's cavity includes: the device comprises a hollow cavity, a first cover cap and a second cover cap, wherein the first cover cap and the second cover cap are arranged at two ends of the cavity; the hollow cavity is used for accommodating a rock core sample; a side opening is formed in the cavity, a first opening is formed in the first cover cap, and a second opening is formed in the second cover cap; the side opening is communicated with a first hydraulic pump;
the rubber sleeve is arranged between the Hooke cavity and the core sample;
a first die ram partially inserted into the first opening, the first die ram having a first probe disposed thereon;
a second die ram partially inserted into the second opening, the second die ram having a second probe disposed thereon;
the heating mechanism is used for heating the hooke cavity;
the temperature sensor is used for measuring the heating temperature of the heating mechanism to the Hooke cavity;
the pulse transmitter is used for transmitting a pulse electrical signal to the rock core sample;
and the oscilloscope is used for picking up the pulse electric signal after the pulse electric signal is transmitted by the core sample.
In a preferred embodiment, the first die ram includes a first portion extending at least partially into the first opening and a second portion connecting the first portion, an end of the first portion extending into the first opening being located within the sleeve; the middle part of the second part is provided with a first accommodating hole for installing the first probe, and a first flow passage penetrating through the first part and the second part is further arranged in the first die pressing head.
In a preferred embodiment, the first flow passage is offset from the first accommodation hole at a position of the first portion.
In a preferred embodiment, the second die ram includes a third portion extending at least partially into the second opening and a fourth portion connecting the third portion, an end of the third portion extending into the second opening being located within the sleeve; and a second accommodating hole for installing the second probe is formed in the middle of the fourth part, and a second flow passage penetrating through the third part and the fourth part is further formed in the second die pressing head.
In a preferred embodiment, the second flow passage is offset from the second accommodation hole at a position of the third portion.
In a preferred embodiment, the heating mechanism comprises an electric blanket, the height of which does not exceed the first and second probes.
In a preferred embodiment, the second opening is connected to a second hydraulic pump through a second line; the first opening is connected with a vacuum pump through a first pipeline.
In a preferred embodiment, a first pressure sensor is provided on the first line and a second pressure sensor is provided on the second line.
In a preferred embodiment, the rubber sleeve comprises a main body part used for wrapping the core sample, and an extension part arranged at the end of the main body part, wherein the extension part comprises: a first portion extending radially outward from the body portion and a second portion folded from the first portion to a side proximate the core sample.
In a preferred embodiment, the temperature and pressure varying ultrasonic core measuring device further comprises a core physical shock absorption platform, which is used for providing a support required by the temperature and pressure varying ultrasonic core measuring device.
Advantageous effects
The embodiment of the utility model provides a variable temperature pressure ultrasonic wave rock core measuring device, the supersound experiment platform that utilizes this variable temperature pressure ultrasonic wave rock core measuring device to form mainly is based on the supersound longitudinal wave, the shear wave speed of the principle measurement rock sample of transmission method. The ultrasonic experiment platform is simple in experiment principle, low in assembly cost and complete in function.
In addition, the newly designed probe mold is high in functionality, the ultrasonic transducer is protected, and the probe mold can displace pore fluid of a rock sample.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation. In the drawings:
fig. 1 is a schematic view of the overall structure of a variable temperature and pressure ultrasonic rock core measuring device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hooke cavity of the temperature and pressure varying ultrasonic rock core measuring device according to the embodiment of the present invention;
fig. 3 is an exploded schematic view of a hooke chamber body of the temperature and pressure varying ultrasonic rock core measuring device according to the embodiment of the present invention;
fig. 4 is a schematic diagram of a rubber sleeve of the temperature and pressure varying ultrasonic rock core measuring device according to the embodiment of the present invention;
fig. 5 is a front view of an ultrasonic mold pressure head of the temperature and pressure varying ultrasonic rock core measuring device according to the embodiment of the present invention;
fig. 6 is the utility model discloses embodiment's alternating temperature pressure ultrasonic wave rock core measuring device ultrasonic mold pressure head's top view.
Description of reference numerals:
1. a core sample;
2. a Hooke's cavity; 20. a cavity; 21. a first cap; 22. a second cap; 23. a rubber sleeve; 230. a main body portion; 231. an extension portion;
3. a first die ram; 30. a first probe; 31. a first accommodation hole; 32. a first flow passage;
4. a second die ram; 40. a second probe;
5. a heating mechanism;
6. a temperature sensor.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Please refer to fig. 1 to 6 in combination, an embodiment of the present invention provides a variable temperature and pressure ultrasonic rock core measuring device, which may include: the Hooke cavity 2 is used for providing external protection for the rock core; the Hooke's chamber 2 includes: a hollow cavity 20 and a first cap 21 and a second cap 22 disposed at both ends of the cavity 20; the hollow cavity 20 is used for accommodating the core sample 1; a side opening is formed in the cavity 20, a first opening is formed in the first cap 21, and a second opening is formed in the second cap 22; the side opening is communicated with a first hydraulic pump; the rubber sleeve 23 is arranged between the Hooke cavity 2 and the rock core sample 1; a first die ram 3 partially inserted into the first opening, the first die ram 3 having a first probe 30 disposed thereon; a second die ram 4 partially inserted into the second opening, the second die ram 4 having a second probe 40 disposed thereon; the heating mechanism 5 is used for heating the hooke cavity 2; the temperature sensor 6 is used for measuring the heating temperature of the heating mechanism 5 to the Hooke cavity 2; the pulse transmitter is used for transmitting a pulse electrical signal to the rock core sample 1; and the oscilloscope is used for picking up the pulse electrical signal after the pulse electrical signal is transmitted through the core sample 1.
In this specification, the temperature-variable pressure ultrasonic core measuring device may further include a core physical damping platform for providing a support required for the experiment of the temperature-variable pressure ultrasonic core measuring device.
In this embodiment, referring to fig. 2, 3 and 4, the hooke's chamber 2 is used to provide external protection for the core sample 1 to prevent the core from being damaged by excessive pressure. Specifically, this hooke's chamber 2 can adopt stainless steel, hooke's chamber 2 can include: a hollow cavity 20 and a first cap 21 and a second cap 22 disposed at both ends of the cavity 20; the hollow cavity 20 is used for accommodating the core sample 1; a side opening is formed in the cavity 20, a first opening is formed in the first cap 21, and a second opening is formed in the second cap 22; the side opening is communicated with a first hydraulic pump; and the rubber sleeve 23 is arranged between the Hooke cavity 2 and the core sample 1.
As shown in fig. 4, the rubber sleeve 23 disposed in the hooke cavity 2 may be made of rice paper, and the rubber sleeve 23 is extruded by a hydraulic pump to provide confining pressure for the core. Specifically, the rubber sleeve 23 includes a main body 230 for wrapping the core sample 1, and an extension 231 disposed at an end of the main body 230, where the extension 231 includes: a first portion extending radially outward from the body portion 230 and a second portion folded from the first portion to the side closer to the core sample 1. The design of the edge of the rubber sleeve 23 can ensure that hydraulic oil cannot flow out to pollute the rock sample.
Referring to fig. 5 and 6, the conventional ultrasonic probe has no pressure resistance, and in the present embodiment, a dedicated mold ram is further provided to protect the probe and perform an indirect measurement function. Ultrasonic velocity measurement under different pressure conditions can be realized by placing the probe in the mould pressure head, and the mould pressure head can be loaded with a fluid pipeline to provide pore pressure and fluid displacement work for the rock core.
In particular, the die ram may include a first die ram 3 and a second die ram 4. A first die ram 3 partially inserted into the first opening, the first die ram 3 having a first probe 30 disposed thereon; a second die ram 4 partially inserted into the second opening, the second die ram 4 having a second probe 40 disposed thereon. The first probe 30 and the second probe 40 are specifically longitudinal wave and transverse wave probes, and the longitudinal wave and transverse wave probes are used for measuring the propagation waveform and time of ultrasonic waves in the core sample 1. The die pressing head can be made of aluminum, longitudinal wave probes and transverse wave probes can be placed in the die pressing head, fluid pipelines can be loaded on the surface of the die pressing head, and pore pressure and fluid displacement work are provided for a rock core.
Wherein the first and second die indenters 3, 4 may have the same or similar shape configuration.
In particular, the first die ram 3 may comprise a first portion at least partially protruding into the first opening and a second portion connecting the first portion, the end of the first portion protruding into the first opening being located inside the rubber sleeve 23; the protruding portion should exceed the rubber sleeve 23 to ensure that the sample is completely in the rubber sleeve 23, so as to be able to bear force. The second portion is provided at a middle portion thereof with a first receiving hole 31 for mounting the first probe 30, and the first die ram 3 is further provided therein with a first flow passage 32 penetrating the first and second portions.
In the variable temperature and pressure ultrasonic core measuring apparatus, if any one of the transmission method and the reflection method can be used for detection, when the reflection method is used for measurement, the position of the first flow channel 32 in the first portion is deviated from the first accommodating hole 31, so that the first flow channel 32 is prevented from interfering with measurement data.
Specifically, the second die ram 4 may include a third portion at least partially extending into the second opening and a fourth portion connecting the third portion, and an end of the third portion extending into the second opening is located in the rubber sleeve 23; the protruding portion should exceed the rubber sleeve 23 to ensure that the sample is completely in the rubber sleeve 23, so as to be able to bear force. A second accommodating hole for installing the second probe 40 is formed in the middle of the fourth portion, and a second flow channel penetrating through the third portion and the fourth portion is further formed in the second die head 4.
For the variable-temperature-pressure ultrasonic core measuring device, if any one of a transmission method and a reflection method can be used for detection, when the reflection method is used for measurement, the position of the second flow channel at the third part deviates from the second accommodating hole, so that the second flow channel is prevented from interfering with measurement data.
In this embodiment, the heating mechanism 5 may include an electric blanket, the height of which does not exceed the height of the first probe 30 and the second probe 40, so as to prevent the electronic device from being damaged due to too high temperature.
In the present embodiment, the temperature sensor 6 is used to measure the heating temperature of the heating mechanism 5 to the hooke's chamber 2. In particular, the temperature sensor 6 can be arranged in a quick coupling of the hooke's chamber 2, so as to accurately measure its heating temperature.
In the embodiment, the pulse emitter and the oscilloscope are used for exciting and receiving ultrasonic waveforms, the pulse emitter emits pulse electrical signals, the pulse electrical signals are picked up by the oscilloscope after being transmitted by the core sample 1, and the transmission speed of the ultrasonic waves in the sample is calculated according to the transmission time of the ultrasonic waves.
The specific principle is as follows: the first probe 30 and the second probe 40 are respectively connected with a pulse emitter and an oscilloscope. The ultrasonic pulse transmitter converts power frequency electricity into an electric signal (with the frequency of MHz) matched with the ultrasonic transducer, the ultrasonic transducer converts the electric signal into a mechanical signal, the mechanical signal is transmitted by a rock sample, the mechanical signal is received by the other ultrasonic transducer, and the received ultrasonic signal is displayed on an oscilloscope. And calculating the wave speed of the rock sample according to the length of the rock sample and the propagation time of the ultrasonic signal in the rock sample, and obtaining the attenuation of the rock sample through the amplitude change of the ultrasonic signal.
In this specification, the first cap 21 is provided with a first opening, and the second cap 22 is provided with a second opening; a fluid displacement and pore pressure device body is connected between the first opening and the second opening. Specifically, the second opening is connected with a second hydraulic pump through a second pipeline; the first opening is connected with a vacuum pump through a first pipeline. A first pressure sensor is arranged on the first pipeline, and a second pressure sensor is arranged on the second pipeline.
The fluid displacement is used for removing fluid which is not easy to remove in the rock sample, and partial rock physical experiments need to apply pore pressure to the sample and observe the influence of pore pressure change on speed. Specifically, the fluid displacement and pore pressure equipment is mainly used for injecting fluid into the core sample 1 by using an ISCO pump, and the outlet end of the core sample 1 is provided with a vacuum pump for exhausting air in the core before increasing the pore pressure so as to achieve a vacuum state of pores.
Specifically, when the variable-temperature-pressure ultrasonic rock core measuring device is used for measuring the ultrasonic longitudinal wave and transverse wave speeds of the rock sample under different pressure and temperature conditions, the variable-temperature-pressure ultrasonic rock core measuring device can be connected with fluid displacement equipment. The fluid displacement apparatus generally comprises: a fluid input portion; a fluid output portion.
The fluid input part injects fluid into the rock core sample 1 by using an ISCO pump, wherein the displacement fluid is input in the sample from bottom to top, and the fluid is completely filled in the rock sample by using the action of gravity. By adjusting the six-way valve, the fluid to be displaced is changed, and mutual displacement among different fluids is realized. During the process of increasing the pore pressure, the pressure sensor can be used for accurately measuring the change condition of the pore pressure.
The fluid output part mainly comprises: a vacuum pump, a sealed flask and a back pressure device. The vacuum pump is used for exhausting redundant gas in the rock sample, so that the interior of the sample is in a vacuum state. The back pressure device is mainly used for keeping the pressure balance of the input end and the output end, and when the fluid pressure exceeds the set pressure, the fluid is discharged. During the measurement process, the change situation of the pore pressure can be accurately measured by using the pressure sensor.
The specification provides a variable-temperature-pressure ultrasonic rock core measuring device, and an ultrasonic experiment platform formed by the variable-temperature-pressure ultrasonic rock core measuring device is mainly used for measuring ultrasonic longitudinal wave and transverse wave speeds of a rock sample based on the principle of a transmission method. The ultrasonic experiment platform is simple in experiment principle, low in assembly cost and complete in function.
In addition, the probe mould that provides in this application specification is functional strong, has not only played the guard action to ultrasonic transducer, and the probe mould also can carry out the displacement of rock sample pore fluid simultaneously.
It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is shown between the two, and no indication or suggestion of relative importance is understood. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention according to the disclosure of the application document.
Claims (10)
1. The utility model provides a variable temperature pressure ultrasonic wave rock core measuring device which characterized in that includes:
the Hooke cavity is used for providing external protection for the rock core; the hooke's cavity includes: the device comprises a hollow cavity, a first cover cap and a second cover cap, wherein the first cover cap and the second cover cap are arranged at two ends of the cavity; the hollow cavity is used for accommodating a rock core sample; a side opening is formed in the cavity, a first opening is formed in the first cover cap, and a second opening is formed in the second cover cap; the side opening is communicated with a first hydraulic pump;
the rubber sleeve is arranged between the Hooke cavity and the core sample;
a first die ram partially inserted into the first opening, the first die ram having a first probe disposed thereon;
a second die ram partially inserted into the second opening, the second die ram having a second probe disposed thereon;
the heating mechanism is used for heating the hooke cavity;
the temperature sensor is used for measuring the heating temperature of the heating mechanism to the Hooke cavity;
the pulse transmitter is used for transmitting a pulse electrical signal to the rock core sample;
and the oscilloscope is used for picking up the pulse electric signal after the pulse electric signal is transmitted by the core sample.
2. The temperature-variable pressure ultrasonic core measuring device according to claim 1, wherein the first mold ram comprises a first portion extending at least partially into the first opening and a second portion connecting the first portion, an end of the first portion extending into the first opening being located within the gum cover; the middle part of the second part is provided with a first accommodating hole for installing the first probe, and a first flow passage penetrating through the first part and the second part is further arranged in the first die pressing head.
3. The temperature-pressure-changing ultrasonic core measurement device according to claim 2, wherein the first flow passage is offset from the first receiving hole at the first portion.
4. The temperature-variable pressure ultrasonic core measuring device according to claim 1, wherein the second mold ram comprises a third portion extending at least partially into the second opening and a fourth portion connecting the third portion, and an end of the third portion extending into the second opening is located within the rubber sleeve; and a second accommodating hole for installing the second probe is formed in the middle of the fourth part, and a second flow passage penetrating through the third part and the fourth part is further formed in the second die pressing head.
5. The temperature-pressure-changing ultrasonic core measuring device according to claim 4, wherein the second flow channel is offset from the second receiving hole at the third portion.
6. The variable temperature and pressure ultrasonic core measurement device according to claim 1, wherein the heating mechanism comprises an electric blanket, and the height of the electric blanket does not exceed the first probe and the second probe.
7. The variable temperature pressure ultrasonic core measurement device according to claim 1, wherein the second opening is connected to a second hydraulic pump through a second line; the first opening is connected with a vacuum pump through a first pipeline.
8. The temperature-variable pressure ultrasonic core measurement device according to claim 7, wherein a first pressure sensor is disposed on the first pipeline, and a second pressure sensor is disposed on the second pipeline.
9. The temperature-variable pressure ultrasonic core measurement device according to claim 1, wherein the rubber sleeve comprises a main body portion for wrapping the core sample, and an extension portion arranged at an end of the main body portion, and the extension portion comprises: a first portion extending radially outward from the body portion and a second portion folded from the first portion to a side proximate the core sample.
10. The temperature-variable pressure ultrasonic core measuring device according to claim 1, further comprising a core physical shock absorption platform for providing a support required for the temperature-variable pressure ultrasonic core measuring device experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121197431.3U CN215218688U (en) | 2021-05-31 | 2021-05-31 | Temperature-variable pressure ultrasonic rock core measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121197431.3U CN215218688U (en) | 2021-05-31 | 2021-05-31 | Temperature-variable pressure ultrasonic rock core measuring device |
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| Publication Number | Publication Date |
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| CN215218688U true CN215218688U (en) | 2021-12-17 |
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| CN202121197431.3U Active CN215218688U (en) | 2021-05-31 | 2021-05-31 | Temperature-variable pressure ultrasonic rock core measuring device |
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- 2021-05-31 CN CN202121197431.3U patent/CN215218688U/en active Active
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