CN117516489A - Method and device for measuring shape of air cavity of salt cavern air storage by laser - Google Patents
Method and device for measuring shape of air cavity of salt cavern air storage by laser Download PDFInfo
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- CN117516489A CN117516489A CN202210906934.6A CN202210906934A CN117516489A CN 117516489 A CN117516489 A CN 117516489A CN 202210906934 A CN202210906934 A CN 202210906934A CN 117516489 A CN117516489 A CN 117516489A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000003860 storage Methods 0.000 title claims abstract description 46
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 239000000523 sample Substances 0.000 claims description 112
- 239000003381 stabilizer Substances 0.000 claims description 13
- 238000000691 measurement method Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 21
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000012937 correction Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
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Abstract
The invention relates to a method and a device for measuring the shape of an air cavity of a salt cavern air storage by laser, wherein the method for measuring the shape of the air cavity of the salt cavern air storage by the laser comprises the following steps: step S1: the measuring instrument is placed in the air cavity, and the depth of the measurement instrument placed in the air cavity is measured; step S2: rotating the measuring instrument at least one circle in the horizontal direction to measure the cross-sectional shape of the air cavity at the corresponding depth; step S3: adjusting the depth of the measuring instrument in the air cavity, and repeating the operation of the step S2; step S4: and constructing a model of the air cavity according to the obtained depth of the air cavity and the cross-sectional shapes of the air cavities corresponding to different depth positions. The invention solves the technical problem of difficult detection of the shape of the air cavity of the salt cavern air storage.
Description
Technical Field
The invention relates to the technical field of salt cavern gas storage detection, in particular to a method and a device for measuring the shape of a gas cavity of a salt cavern gas storage by laser, and particularly relates to a method and a device for measuring the shape of the cavity after gas injection and production of the cavity of the salt cavern gas storage.
Background
At present, the sonar technology is mainly adopted for detecting the shape of the air cavity of the salt cavern air storage, the main principle is that a sonar measuring instrument is lowered along a shaft, pulse sound waves are transmitted, echo signals are received, and the signals are transmitted back to a ground processing device through a connecting cable, so that the shape of the cavity is detected. The sonar logging is mainly applied to the salt cavern gas storage, firstly, the cavity shape is detected in the cavity making process, and the cavity dissolving process is timely adjusted according to the measurement result; and secondly, after the cavity is put into injection and production operation, the cavity shape is detected periodically so as to discover underground faults as early as possible and ensure the safety of the salt cavern gas storage.
The sound wave is attenuated very little in water, so that sonar detection on a brine cavity (brine retention and in the cavity can be generated in the process of dissolving the cavity) is easier, but the detection difficulty is greatly increased because the sound wave is attenuated very fast in the gas and the reflection interference is large; in addition, the method for detecting the cavity shape after gas injection and the used equipment are not completely mastered, and the measurement of the cavity shape is still a key point and a difficult point in the construction process of the salt cavern gas storage.
Aiming at the problem that the shape of the air cavity of the salt cavern air storage is difficult to detect in the related art, no effective solution is provided at present.
Therefore, the inventor provides a method and a device for measuring the shape of the air cavity of the salt cavern air storage by virtue of experience and practice of related industries for many years, so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide a method and a device for measuring the shape of a salt cavern gas storage air cavity by laser, which solve the problem of difficult detection of the shape of the salt cavern gas storage air cavity after gas injection and casting by adopting a laser measurement method, break a barrier for detecting the shape of the salt cavern gas storage air cavity and realize the purposes of low cost and high efficiency detection of the salt cavern gas storage air cavity.
The object of the invention can be achieved by the following scheme:
the invention provides a method for measuring the shape of an air cavity of a salt cavern air storage by laser, which comprises the following steps:
step S1: the measuring instrument is placed in the air cavity, and the depth of the measuring instrument placed in the air cavity is measured;
step S2: rotating the measuring instrument at least one revolution in a horizontal direction to measure the cross-sectional shape of the air cavity at a corresponding depth;
step S3: adjusting the depth of the measuring instrument in the air cavity, and repeating the operation of the step S2;
step S4: and constructing a model of the air cavity according to the obtained depth of the air cavity and the cross-sectional shapes of the air cavity corresponding to different depth positions.
In a preferred embodiment of the present invention, the depth of the air cavity and the number of acquisitions of the cross-sectional shape of the air cavity are increased to improve the accuracy of measurement.
In a preferred embodiment of the present invention, in the step S1 and the step S3, a method of magnetic positioning and/or natural gamma measurement is adopted to measure and verify the depth of the measuring instrument in the air cavity.
In a preferred embodiment of the invention, the tolerance temperature of the measuring instrument is 0 ℃ to 75 ℃, and the pressure bearing capacity of the measuring instrument is greater than or equal to 30MPa, so that the measuring instrument can measure the air cavity at a depth of less than or equal to 2000 m.
In a preferred embodiment of the present invention, the measuring instrument comprises a first laser probe and a second laser probe, and the first laser probe is used for measuring the distance between the vertical downward measuring instrument and the gas-liquid interface in the air cavity and the distance between the measuring instrument and the inner wall of the air cavity from the vertical downward to the horizontal direction; the second laser probe is used for measuring the distance between the measuring instrument and the inner wall of the air cavity from the horizontal direction to the inclined direction.
In a preferred embodiment of the invention, the open hole section between the upper part of the air cavity and the production sleeve pipe shoe is a neck section, and a model of the neck section is constructed by adopting a spiral measurement method or a fixed-point measurement method.
In a preferred embodiment of the present invention, in the step S4, the model of the air chamber is constructed as a three-dimensional model to display at least the shape of the cross section, the shape of the longitudinal section, the radius of the section, and the volume of the air chamber at each position of the air chamber.
The invention provides a device for measuring the shape of an air cavity of a salt cavern air storage by laser, which comprises a measuring instrument, wherein the measuring instrument is placed into a preset depth in the air cavity, the measuring instrument comprises a laser probe, and at the same preset depth position, the measuring instrument can rotate at least one circle in the horizontal direction so as to measure the distance between the measuring instrument and the inner wall of the air cavity when the measuring instrument corresponds to different angles in the process of rotating one circle in the corresponding depth by the laser probe.
In a preferred embodiment of the present invention, the measuring instrument includes a probe mounting assembly, and the laser probe includes at least a first laser probe and a second laser probe, and the first laser probe and the second laser probe are disposed on a bottom and a sidewall of the probe mounting assembly, respectively.
In a preferred embodiment of the present invention, the measuring instrument includes an azimuth adjusting assembly, the probe mounting assembly is located at the bottom of the azimuth adjusting assembly and connected to the actuating end of the azimuth adjusting assembly, and the probe mounting assembly can be driven to rotate circumferentially in a horizontal direction and to rotate obliquely in a vertical direction by the azimuth adjusting assembly, so that the first laser probe can emit a laser beam obliquely below the probe mounting assembly, and the second laser probe can emit a laser beam obliquely above the probe mounting assembly.
In a preferred embodiment of the invention, the measuring instrument further comprises a stabilizer assembly determining the direction of rotation of the probe mounting assembly, the stabilizer assembly being located on top of the azimuth adjusting assembly and connected to a fixed end of the azimuth adjusting assembly.
In a preferred embodiment of the invention, the measuring instrument further comprises a depth calibration assembly for measuring the depth of the probe mounting assembly into the air cavity, the depth calibration assembly being located on top of and connected to the stabilizer assembly.
In a preferred embodiment of the present invention, at least one of a magnetic locator and a natural gamma logging instrument is disposed within the depth calibration assembly.
In a preferred embodiment of the present invention, a temperature measuring element and a load cell are also disposed within the depth calibration assembly.
In a preferred embodiment of the present invention, the measuring instrument further comprises a cable connector, wherein the cable connector is located above the depth correction assembly and connected with the depth correction assembly, the cable connector is connected with one end of a transmission cable, and the other end of the transmission cable extends to the ground and is connected with a control system.
From the above, the method and the device for measuring the shape of the air cavity of the salt cavern air storage by using the laser have the characteristics and advantages that: the method is simple and easy to implement, has high measurement precision, can not be influenced by gas in the air cavity, improves the efficiency and the accuracy of the measurement cavity, has lower measurement cost and wide application range, and is especially suitable for measuring the shape of the air cavity of a salt cavern gas storage.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention.
Wherein:
fig. 1: a flow chart of a method for measuring the shape of the air cavity of the salt cavern air storage by using the laser.
Fig. 2: the method is a schematic diagram of the position of a measuring instrument in an air cavity in the method for measuring the shape of the air cavity of the salt cavern air storage by laser.
Fig. 3: the device for measuring the shape of the air cavity of the salt cavern air storage by using the laser is a structural schematic diagram.
The reference numerals in the invention are:
1. a transmission cable; 2. A measuring instrument;
201. a cable joint; 202. A depth correcting component;
203. a stabilizer assembly; 204. An azimuth adjustment assembly;
205. a first laser probe; 206. A second laser probe;
207. a probe mounting assembly; 10. An air cavity;
1001. a middle section; 1002. A cavity top section;
1003. a cavity bottom section; 1004. A neck section;
20. and a gas-liquid interface.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
Embodiment one
As shown in fig. 1, the invention provides a method for measuring the shape of an air cavity of a salt cavern air storage by laser, which comprises the following steps:
step S1: lowering the measuring instrument 2 into the air cavity 10 and measuring the depth of the lower air cavity 10;
step S2: rotating the measuring instrument 2 at least one turn in the horizontal direction (i.e., at the same depth, the measuring instrument 2 needs to be rotated 360 ° in the horizontal direction) to measure the cross-sectional shape of the air cavity 10 at the corresponding depth;
step S3: adjusting the depth of the measuring instrument 2 in the air cavity 10, and repeating the operation of the step S2;
step S4: based on the obtained depth of the air cavity 10 and the cross-sectional shape of the air cavity 10 corresponding to the positions of different depths, a model of the air cavity 10 is constructed.
In an alternative embodiment of the present invention, the depth of the air cavity 10 and the number of acquisitions of the cross-sectional shape of the corresponding air cavity 10 may be increased according to the measurement accuracy requirement and the actual situation of the cavity, so as to improve the measurement accuracy. Wherein, the greater the number of depth points measured, the greater the number of cross-sectional shapes of the air cavity 10 obtained, and the denser the cross-section of the air cavity 10 obtained, the greater the accuracy of the model of the air cavity 10 constructed.
In an alternative embodiment of the present invention, in step S1 and step S3, the depth of the measuring instrument 2 lowered into the air cavity 10 may be measured and verified by using a magnetic positioning and/or natural gamma measurement method. In the measuring process, the depth of the measuring instrument 2 in the air cavity 10 can be measured by a magnetic positioning method and a natural gamma measuring method, or the depth can be measured by the magnetic positioning method and the natural gamma measuring method at the same time, and the two depth data are compared and analyzed and verified mutually, so that the aim of calibration is achieved, the measuring result is more accurate, and the application range is wider.
In an alternative embodiment of the invention, the tolerance temperature of the measuring instrument 2 is between 0 ℃ and 75 ℃, and the pressure bearing capacity of the measuring instrument 2 is greater than or equal to 30MPa, so that the measuring instrument 2 can measure the air cavity 10 at a depth of less than or equal to 2000m, and further, the measuring instrument 2 can be suitable for measuring all salt cavity cavities at present.
In an alternative embodiment of the present invention, as shown in fig. 2 and 3, the measuring instrument 2 includes at least one first laser probe 205 and at least one second laser probe 206, and the first laser probe 205 is used for measuring the distance between the vertical downward measuring instrument 2 and the gas-liquid interface 20 in the air cavity 10 and the distance between the measuring instrument 2 and the inner wall of the air cavity 10 from the vertical downward direction to the horizontal direction; the second laser probe 206 is used to measure the distance between the measuring instrument 2 and the inner wall of the air chamber 10 from the horizontal direction to the obliquely upward direction. Namely: in the initial state, the first laser probe 205 emits a laser beam vertically downward to measure the distance between the measuring instrument 2 and the gas-liquid interface 20; the second laser probe 206 generates a laser beam in a horizontal direction to measure a distance between the horizontal direction of the measuring instrument 2 and the inner wall of the air cavity 10, and according to an actual measuring environment, the first laser probe 205 and the second laser probe 206 can be simultaneously rotated within a range of 0 ° to 90 ° in a vertical direction, so that the first laser probe 205 can measure the inner wall of the air cavity 10 obliquely below the measuring instrument 2, and the second laser probe 206 can measure the inner wall of the air cavity 10 obliquely above the measuring instrument 2.
Further, since the gas chamber 10 contains a gas such as methane and methane has a spectral absorption effect, and the wavelength band of the absorption laser light is 1310nm to 1350nm, the wavelength of the laser light emitted from the first laser probe 205 and the second laser probe 206 used in the present invention is preferably 905 nm.
In an alternative embodiment of the present invention, as shown in fig. 2, the air cavity 10 includes a middle section 1001 with a gentle slope angle of the inner wall, a top section 1002 above the middle section 1001, and a bottom section 1003 below the middle section 1001, where the middle section 1001, the top section 1002, and the bottom section 1003 are not clearly defined in the actual air cavity 10, and a worker can set the ranges of the middle section 1001, the top section 1002, and the bottom section 1003 by himself or herself when performing measurement, so that the purpose is to achieve the purpose of facilitating measurement by using different measurement modes. If the position to be measured is located in the middle section 1001, the laser beam can be generated along the horizontal direction by the second laser probe 206 to measure the distance between the horizontal direction of the measuring instrument 2 and the inner wall of the air cavity 10; if the position to be measured is located at the cavity top section 1002, the second laser probe 206 is directly adopted to generate a laser beam along the horizontal direction, so that the second laser probe 206 can be rotated upwards, and the second laser probe 206 generates the laser beam along the inclined upward direction so as to measure the distance between the measuring instrument 2 in the cavity top section 1002 and the inner wall of the air cavity 10; if the position to be measured is located at the cavity bottom section 1003, the second laser probe 206 is directly adopted to generate a laser beam along the horizontal direction, so that the laser beam is difficult to measure, the first laser probe 205 can be rotated upwards, and the first laser probe 205 generates the laser beam along the inclined downward direction, so that the distance between the measuring instrument 2 and the inner wall of the air cavity 10 in the cavity bottom section 1003 is measured. Of course, the deformed portion (such as a small hole region extending into the ground at any position of the inner wall of the air cavity 10) can be formed in the air cavity 10, and the shape of the region can be measured by adjusting the measuring instrument 2 at a proper depth position and by the inclined arrangement of the first laser probe 205 or the second laser probe 206.
In the present embodiment, as shown in fig. 2, when the measured depth is within the range of the middle section 1001, the second laser probe 206 emits a laser beam in the horizontal direction for measuring the horizontal distance L1 between the measuring instrument 2 and the inner wall of the air chamber 10 corresponding to the middle section 1001;
in this embodiment, as shown in fig. 2, when the measured depth is within the range of the cavity top section 1002, the second laser probe 206 is rotated obliquely upward, so that the second laser probe 206 emits a laser beam obliquely upward to obtain a horizontal distance L2' between the projection of the measuring instrument 2 on the vertical direction and the inner wall of the cavity 10 corresponding to the cavity top section 1002; the calculation relation is as follows:
L2’＝L2×sinα；
wherein L2' is a horizontal distance between a projection of the measuring instrument 2 on the vertical direction and an inner wall of the air cavity 10 corresponding to the cavity top section 1002 (i.e., a radius of a position to be measured of the air cavity 10), L2 is a length of the second laser probe 206 for emitting the laser beam obliquely upward, and α is an angle between the second laser probe 206 for emitting the laser beam obliquely upward and the vertical direction.
In the present embodiment, as shown in fig. 2, when the measured depth is within the range of the cavity bottom section 1003, the first laser probe 205 is rotated obliquely downward so that the first laser probe 205 emits a laser beam obliquely downward to obtain a horizontal distance L3' between the projection of the measuring instrument 2 in the vertical direction and the inner wall of the air cavity 10 corresponding to the cavity bottom section 1003; the calculation relation is as follows:
L3’＝L3×sinβ；
wherein L3' is the horizontal distance between the projection of the measuring instrument 2 in the vertical direction and the inner wall of the air cavity 10 corresponding to the cavity bottom section 1003 (i.e. the radius of the position to be measured of the air cavity 10), L3 is the length of the laser beam emitted by the first laser probe 205 in the obliquely downward direction, and β is the angle between the laser beam emitted by the first laser probe 205 in the obliquely downward direction and the vertical direction.
By the method, the corresponding depths of the measuring instrument 2, which are respectively lowered into the middle section 1001, the cavity top section 1002 and the cavity bottom section 1003, can be measured and calculated, so that the horizontal distance between the measuring instrument 2 and the inner wall of the air cavity 10 at each position is obtained, and the first laser probe 205 and the second laser probe 206 are always in a state of rotating circumferentially in the horizontal direction in the measuring process, so that the radius of the air cavity 10 at each angle corresponding to the depth can be measured at 360 degrees, the cross section shape of the air cavity 10 is obtained, and the purpose of constructing the model of the air cavity 10 is achieved.
In an alternative embodiment of the present invention, as shown in fig. 2, the open hole section between the top of the cavity 1002 and the production casing shoe is the neck section 1004, and a model of the neck section 1004 can be constructed by using a spiral measurement method or a fixed point measurement method.
Further, the spiral measurement method is as follows: the measuring instrument 2 is continuously lifted upwards at the neck section 1004, and meanwhile, the measuring instrument 2 is in a circumferential rotation state, and the second laser probe 206 always emits laser beams in the process, so that a graph formed by the laser beams emitted by the second laser probe 206 irradiated to the inner wall of the air cavity 10 is collected to be a spiral line, and a model of the neck section 1004 can be formed by fitting through the spiral line. In the process of constructing the model of the neck section 1004 by adopting the spiral measurement method, the measuring instrument 2 is in ultra-low-speed lifting measurement, and the lifting speed is less than 100m/h so as to ensure that the required spiral line can be stably measured and accurately obtained.
Further, the fixed point measurement method is as follows: each time the measuring instrument 2 is lifted up at a certain height of the neck section 1004, even if the measuring instrument 2 rotates at each height position along the horizontal direction for one circle, the second laser probe 206 always emits laser beams in the process of rotation, so that a graph formed by collecting the laser beams emitted by the second laser probe 206 and irradiating the inner wall of the air cavity 10 is in a ring shape, each time the second laser probe 206 is lifted up at a certain height, a ring graph can be formed, and each ring graph is vertically overlapped, so that a model of the neck section 1004 can be formed by fitting.
In an alternative embodiment of the present invention, in step S4, the model of the air cavity 10 may be a three-dimensional model, and after the model of the air cavity 10 is constructed, it is necessary to be able to display at least the shape of the cross section, the shape of the longitudinal section, the radius of the cross section, and the volume of the air cavity 10 at each location of the air cavity 10, so as to obtain the overall shape of the air cavity 10.
The method for measuring the shape of the air cavity of the salt cavern air storage by using the laser has the characteristics and advantages that:
according to the method for measuring the shape of the air cavity of the salt cavern air storage by the laser, a measuring instrument 2 capable of generating the laser is placed into the air cavity 10, the depth of the air cavity 10 is measured, the measuring instrument 2 is rotated at least one circle in the horizontal direction, the horizontal distance between the measuring instrument 2 and the inner wall of the air cavity 10 is measured by generating the laser to the inner wall of the air cavity 10 all the time in the rotating process, the cross section shape of the air cavity 10 at the current depth can be obtained, the depth of the measuring instrument 2 placed into the air cavity 10 is continuously adjusted, the cross section shapes of the air cavity 10 at different depth positions are measured according to the steps, and a model of the air cavity 10 can be constructed according to the obtained depth of the air cavity 10 and the cross section shapes of the air cavities 10 corresponding to the different depth positions.
Second embodiment
As shown in fig. 2 and 3, the invention provides a device for measuring the shape of an air cavity of a salt cavern air storage by using laser, which comprises a measuring instrument 2, wherein the measuring instrument 2 is lowered to a preset depth in an air cavity 10, the measuring instrument 2 comprises a laser probe, and at the same preset depth position, the measuring instrument 2 can rotate at least one circle in the horizontal direction so as to measure the distance between the measuring instrument 2 and the inner wall of the air cavity 10 when the measuring instrument 2 corresponds to different angles in the process of rotating one circle at the corresponding depth through the laser probe, thereby obtaining the depth of the air cavity 10 and the cross-sectional shape of the air cavity 10 corresponding to the different depth positions, and achieving the purpose of constructing a model of the air cavity 10.
In an alternative embodiment of the invention, as shown in fig. 3, the measuring instrument 2 comprises a probe mounting assembly 207, the laser probe comprises at least a first laser probe 205 and a second laser probe 206, the first laser probe 205 is arranged at the bottom of the probe mounting assembly 207, so as to measure the distance between the measuring instrument 2 and the gas-liquid interface 20 and the radius of the cavity bottom section 1003; the second laser probe 206 is disposed on a sidewall of the probe mount assembly 207 to measure the radius of the center section 1001 and the radius of the cavity top section 1002.
In an alternative embodiment of the present invention, as shown in fig. 3, the measuring instrument 2 includes an azimuth adjusting assembly 204, and a probe mounting assembly 207 is located at the bottom of the azimuth adjusting assembly 204 and connected to the actuating end of the azimuth adjusting assembly 204, and the probe mounting assembly 207 is driven to rotate circumferentially in the horizontal direction and to tilt vertically by the azimuth adjusting assembly 204, so that the first laser probe 205 can emit a laser beam obliquely downward of the probe mounting assembly 207, and the second laser probe 206 can emit a laser beam obliquely upward of the probe mounting assembly 207.
Further, the azimuth adjusting assembly 204 at least comprises a first driving motor and a second driving motor, wherein an output shaft of the first driving motor is vertically arranged, so that the first driving motor can drive the first laser probe 205 and the second laser probe 206 to rotate along the circumferential direction in the horizontal direction; in addition, the output shaft of the second drive motor is disposed in the horizontal direction, so that the first laser probe 205 and the second laser probe 206 can be driven by the second drive motor to adjust the inclination angle in the vertical direction (the inclination range is 0 ° to 90 °). Of course, the azimuth adjusting assembly 204 may also be implemented by using a mechanical arm, a multi-dimensional moving platform or other crank arm structures, which only ensures that the first laser probe 205 and the second laser probe 206 can be driven to rotate circumferentially in the horizontal direction, and the inclination angles of the first laser probe 205 and the second laser probe 206 can be vertically lifted, and the specific structure of the azimuth adjusting assembly 204 is not limited in the invention.
In an alternative embodiment of the invention, as shown in fig. 3, the measuring instrument 2 further comprises a stabilizer assembly 203 determining the rotational direction of the probe mounting assembly 207, the stabilizer assembly 203 being located on top of the azimuth adjustment assembly 204 and being connected to a fixed end of the azimuth adjustment assembly 204.
Further, the stabilizer assembly 203 includes at least a fiber optic gyroscope, a stabilizing gyroscope system, and a gyroscope positioning system (or a MEMS-based positioning system and a matched positioning device). Wherein, stable gyroscope system and gyroscope positioning system are prior art, in the in-process of first laser probe 205 and second laser probe 206 along circumference rotation in the horizontal direction, play fixed north through stabilizer subassembly 203 to guarantee that first laser probe 205 and second laser probe 206 can accurately rotate at least a week. In addition, the optical fiber gyroscope has the advantages of light weight, small volume, low cost, high precision, high reliability and the like.
In an alternative embodiment of the invention, as shown in fig. 3, the measuring instrument 2 further comprises a depth calibration assembly 202 for detecting the depth of the probe mounting assembly 207 into the air cavity 10, the depth calibration assembly 202 being located on top of the stabilizer assembly 203 and being connected to the stabilizer assembly 203.
Further, at least the magnetic positioner and/or the natural gamma logging instrument are arranged in the depth correcting component 202, in the measuring process, the depth of the measuring instrument 2 in the air cavity 10 can be measured through the magnetic positioner and the natural gamma logging instrument, or the depth of the measuring instrument 2 in the air cavity 10 can be measured through the magnetic positioner and the natural gamma logging instrument, and the two depth data are compared and analyzed, so that the aim of calibration is achieved, the measuring result is more accurate, and the application range is wider.
Further, a temperature measuring element and a load cell are also disposed within the depth calibration assembly 202. The temperature and pressure at different depths within the air cavity 10 are measured in real time by the temperature measuring element and load cell for personnel to record.
In an alternative embodiment of the invention, as shown in fig. 2 and 3, the measuring instrument 2 further comprises a cable connector 201, the cable connector 201 being located above the depth correction assembly 202 and being connected to the depth correction assembly 202, the cable connector 201 being connected to one end of the transmission cable 1, the other end of the transmission cable 1 extending to the ground and being connected to the control system. Wherein the control system may be, but is not limited to, a computer.
Further, the control system comprises modem means for signal transmission between the control system and the transmission cable 1 via the cable connection 201.
In the present invention, since the gas cavity 10 is filled with natural gas after the gas injection production is completed, it is necessary to install a blowout preventer at the wellhead and perform operations according to the requirements of the pressure logging.
The device for measuring the shape of the air cavity of the salt cavern air storage by using the laser has the characteristics and advantages that:
the device for measuring the shape of the air cavity of the salt cavern air storage by using the laser has the advantages of simple structure, simple and convenient operation and high intelligent degree, and can achieve the purpose of accurately measuring the shape of the air cavity 10 by using the laser; in addition, the invention has lower measurement cost and wide application range, and is particularly suitable for measuring the shape of the air cavity of the salt cavern air storage.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (15)
1. The method for measuring the shape of the air cavity of the salt cavern air storage by using the laser is characterized by comprising the following steps of:
step S1: the measuring instrument is placed in the air cavity, and the depth of the measuring instrument placed in the air cavity is measured;
step S2: rotating the measuring instrument at least one revolution in a horizontal direction to measure the cross-sectional shape of the air cavity at a corresponding depth;
step S3: adjusting the depth of the measuring instrument in the air cavity, and repeating the operation of the step S2;
step S4: and constructing a model of the air cavity according to the obtained depth of the air cavity and the cross-sectional shapes of the air cavity corresponding to different depth positions.
2. The method for measuring the shape of the air cavity of the salt cavern air storage according to claim 1, wherein the depth of the air cavity and the acquired number of the corresponding cross-sectional shapes of the air cavity are increased to improve the measurement accuracy.
3. The method for measuring the shape of the air cavity of the salt cavern air storage according to claim 1, wherein in the step S1 and the step S3, a method of magnetic positioning and/or natural gamma measurement is adopted to measure and verify the depth of the measuring instrument in the air cavity.
4. The method for measuring the shape of an air cavity of a salt cavern air storage according to claim 1, wherein the tolerance temperature of the measuring instrument is 0 ℃ to 75 ℃, and the pressure bearing capacity of the measuring instrument is greater than or equal to 30MPa, so that the measuring instrument can measure the air cavity at a depth of less than or equal to 2000 m.
5. The method for measuring the shape of an air cavity of a salt cavern air storage according to claim 1, wherein the measuring instrument comprises a first laser probe and a second laser probe, and the first laser probe is used for measuring the distance between a vertically downward measuring instrument and an air-liquid interface in the air cavity and the distance between the measuring instrument and the inner wall of the air cavity from the vertical downward direction to the horizontal direction; the second laser probe is used for measuring the distance between the measuring instrument and the inner wall of the air cavity from the horizontal direction to the inclined direction.
6. The method for measuring the shape of the air cavity of the salt cavern air storage according to claim 5, wherein an open hole section between the upper part of the air cavity and the production casing pipe shoe is a neck section, and a model of the neck section is constructed by adopting a spiral measurement method or a fixed point measurement method.
7. The method for measuring the shape of the air cavity of the salt cavern air storage according to claim 1, wherein in the step S4, a model of the air cavity is constructed as a three-dimensional model to display at least the shape of the cross section, the shape of the longitudinal section, the radius of the section and the volume of the air cavity at each position of the air cavity.
8. The device for measuring the shape of the air cavity of the salt cavern air storage by using the laser is characterized by comprising a measuring instrument, wherein the measuring instrument is placed into a preset depth in the air cavity, the measuring instrument comprises a laser probe, and the measuring instrument can rotate at least one circle in the horizontal direction at the same preset depth position so as to measure the distance between the measuring instrument and the inner wall of the air cavity when the measuring instrument corresponds to different angles in the process of rotating one circle in the corresponding depth through the laser probe.
9. The apparatus for laser measurement of the shape of the air cavity of a salt cavern air storage according to claim 8, wherein the measuring instrument comprises a probe mounting assembly, the laser probe comprises at least a first laser probe and a second laser probe, and the first laser probe and the second laser probe are respectively arranged on the bottom and the side wall of the probe mounting assembly.
10. The device for measuring the shape of the air cavity of the salt cavern air storage according to claim 9, wherein the measuring instrument comprises an azimuth adjusting component, the probe mounting component is positioned at the bottom of the azimuth adjusting component and is connected with the action end of the azimuth adjusting component, and the probe mounting component can be driven to rotate circumferentially in the horizontal direction and rotate obliquely in the vertical direction through the azimuth adjusting component, so that the first laser probe can emit a laser beam obliquely downwards of the probe mounting component, and the second laser probe can emit the laser beam obliquely upwards of the probe mounting component.
11. The apparatus for laser measurement of the shape of a salt cavern gas storage cavity of claim 10, wherein the measuring instrument further comprises a stabilizer assembly for determining the direction of rotation of the probe mounting assembly, the stabilizer assembly being positioned on top of the orientation adjustment assembly and connected to a fixed end of the orientation adjustment assembly.
12. The apparatus for laser measurement of the shape of a salt cavern gas storage cavity of claim 11, wherein the measuring instrument further comprises a depth calibration assembly for measuring the depth of the probe mounting assembly lowered into the cavity, the depth calibration assembly being located on top of and connected to the stabilizer assembly.
13. The device for measuring the shape of the air cavity of the salt cavern air storage according to claim 12, wherein at least a magnetic locator and/or a natural gamma logging instrument are arranged in the depth correcting component.
14. The apparatus for measuring the shape of the air cavity of the salt cavern air storage according to claim 13, wherein a temperature measuring element and a load cell are further arranged in the depth correcting component.
15. The apparatus for laser measurement of the shape of the air cavity of a salt cavern air reservoir of claim 13, wherein the measuring instrument further comprises a cable connector located above and connected to the depth adjustment assembly, the cable connector connected to one end of a transmission cable, the other end of the transmission cable extending to the ground and connected to a control system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210906934.6A CN117516489A (en) | 2022-07-29 | 2022-07-29 | Method and device for measuring shape of air cavity of salt cavern air storage by laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210906934.6A CN117516489A (en) | 2022-07-29 | 2022-07-29 | Method and device for measuring shape of air cavity of salt cavern air storage by laser |
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| CN117516489A true CN117516489A (en) | 2024-02-06 |
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| CN202210906934.6A Pending CN117516489A (en) | 2022-07-29 | 2022-07-29 | Method and device for measuring shape of air cavity of salt cavern air storage by laser |
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| Country | Link |
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| CN (1) | CN117516489A (en) |
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