CN110501367B - Heterogeneous formation nuclear magnetic resonance spectrum calibration device - Google Patents
Heterogeneous formation nuclear magnetic resonance spectrum calibration device Download PDFInfo
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- CN110501367B CN110501367B CN201910694031.4A CN201910694031A CN110501367B CN 110501367 B CN110501367 B CN 110501367B CN 201910694031 A CN201910694031 A CN 201910694031A CN 110501367 B CN110501367 B CN 110501367B
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 34
- 238000000655 nuclear magnetic resonance spectrum Methods 0.000 title claims abstract description 11
- 238000005481 NMR spectroscopy Methods 0.000 claims abstract description 59
- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000004088 simulation Methods 0.000 claims description 31
- 239000007769 metal material Substances 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 25
- 239000012530 fluid Substances 0.000 description 18
- 239000000523 sample Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 8
- 230000006698 induction Effects 0.000 description 8
- 238000005192 partition Methods 0.000 description 8
- 230000003068 static effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 235000020637 scallop Nutrition 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 241000237503 Pectinidae Species 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000237509 Patinopecten sp. Species 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N24/00—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects
- G01N24/08—Investigating or analyzing materials by the use of nuclear magnetic resonance, electron paramagnetic resonance or other spin effects by using nuclear magnetic resonance
- G01N24/081—Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- High Energy & Nuclear Physics (AREA)
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Abstract
The disclosure provides a nuclear magnetic resonance spectrum calibration device for a heterogeneous formation. The method comprises the following steps: the scale drum, the rotating assembly and the bracket assembly; the lower end of the scale barrel is connected with the rotating assembly, and the rotating assembly drives the scale barrel to rotate along the axial direction when rotating; the bracket component comprises a first moving part, a second moving part and a fixing part; the second moving part is connected with the fixed part in a sliding manner, and the first moving part is connected with the second moving part in a sliding manner; the bracket assembly further comprises a force arm, a first end of the force arm is connected with the first moving part in a sliding mode, and a second end of the force arm is used for being connected with the nuclear magnetic resonance detection device; the scale barrel comprises a first hollow barrel and a second hollow barrel, and the first hollow barrel is coaxially sleeved in the second hollow barrel; the nuclear magnetic resonance detection device is suspended in the first hollow barrel. The device provided by the embodiment can restore the underground motion state of the nuclear magnetic resonance logging device while drilling, and can test the nuclear magnetic resonance logging device in different motion states according to actual conditions, so that the nuclear magnetic resonance logging device can be calibrated more accurately.
Description
Technical Field
The invention relates to a calibration technology of a nuclear magnetic resonance detection device, in particular to a nuclear magnetic resonance spectrum calibration device for a heterogeneous formation, and belongs to the field of petroleum exploration.
Background
Nuclear Magnetic Resonance (NMR) phenomenon was discovered in 1946, and soon thereafter, it was applied to the fields of physics, chemistry, material science, life science, medicine, and the like. In the 50 s of the 20 th century, nuclear magnetic resonance began to be applied in the oil and gas industry, initially in the field of reservoir petrophysical.
The nuclear magnetic resonance detection technology is a technology for detecting hydrogen atoms by using the nuclear magnetic resonance principle. The content and occurrence state of hydrogen atoms in the object to be detected are detected to obtain the information of various components in the object to be detected. A static magnetic field is formed by a magnet in a probe of the nuclear magnetic resonance detection device, a radio frequency antenna emits radio frequency magnetic field pulses to a measured object, resonance signals are collected, and the density of hydrogen nuclei in the measured object and the relaxation characteristics of fluid molecules are measured according to the collected signals, so that various components stored in the measured object are analyzed.
In order to improve the accuracy of solution information in a reservoir detected by the nuclear magnetic resonance detection device, a calibration device needs to be adopted to calibrate the nuclear magnetic resonance detection device. How to improve the scale accuracy is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention provides a nuclear magnetic resonance spectrum calibration device for a heterogeneous formation, which can improve the calibration accuracy of a nuclear magnetic resonance detection device.
The invention provides a nuclear magnetic resonance spectrum calibration device for a heterogeneous formation, which comprises:
the scale drum, the rotating assembly and the bracket assembly;
the lower end of the scale barrel is connected with the rotating assembly, and the rotating assembly drives the scale barrel to rotate axially when rotating;
the bracket assembly comprises a first moving part, a second moving part and a fixing part;
the second moving part is connected with the fixed part in a sliding mode, and the first moving part is connected with the second moving part in a sliding mode;
the bracket assembly further comprises a force arm, a first end of the force arm is connected with the first moving part in a sliding mode, and a second end of the force arm is used for being connected with a nuclear magnetic resonance detection device;
the scale barrel comprises a first hollow barrel and a second hollow barrel, and the first hollow barrel is coaxially sleeved in the second hollow barrel;
the nuclear magnetic resonance detection device is suspended in the first hollow barrel.
The disclosure provides a nuclear magnetic resonance spectrum calibration device for a heterogeneous formation. The method comprises the following steps: the scale drum, the rotating assembly and the bracket assembly; the lower end of the scale barrel is connected with the rotating assembly, and the rotating assembly drives the scale barrel to rotate along the axial direction when rotating; the bracket component comprises a first moving part, a second moving part and a fixing part; the second moving part is connected with the fixed part in a sliding manner, and the first moving part is connected with the second moving part in a sliding manner; the bracket assembly further comprises a force arm, a first end of the force arm is connected with the first moving part in a sliding mode, and a second end of the force arm is used for being connected with the nuclear magnetic resonance detection device; the scale barrel comprises a first hollow barrel and a second hollow barrel, and the first hollow barrel is coaxially sleeved in the second hollow barrel; the nuclear magnetic resonance detection device is suspended in the first hollow barrel. The device provided by the embodiment can restore the underground motion state of the nuclear magnetic resonance logging device while drilling, and can test the nuclear magnetic resonance logging device in different motion states according to actual conditions, so that the nuclear magnetic resonance logging device can be calibrated more accurately.
Drawings
FIG. 1 is a block diagram of an apparatus for nuclear magnetic resonance spectroscopy of a non-homogeneous formation according to an exemplary embodiment of the present invention;
FIG. 2 is a block diagram of a bracket assembly shown in accordance with an exemplary embodiment of the present invention;
FIG. 3 is a cross-sectional view of a scale drum shown in an exemplary embodiment of the invention;
FIG. 4 is a block diagram illustrating a rotating assembly in accordance with an exemplary embodiment of the present invention;
FIG. 5 is a block diagram of a scale drum according to an exemplary embodiment of the present invention;
fig. 6 is a schematic structural diagram of a shielding cover plate according to an exemplary embodiment of the present invention;
fig. 7 is an exploded view of the shield cover shown in fig. 6.
Detailed Description
Fig. 1 is a block diagram of an apparatus for nuclear magnetic resonance spectroscopy of a non-homogeneous formation according to an exemplary embodiment of the present invention.
As shown in fig. 1, the calibration apparatus for nuclear magnetic resonance spectrum of heterogeneous formation according to this embodiment includes: scale bucket 11, rotating assembly 12, bracket component 13.
Geological materials such as sand, soil, stones or fluid and the like can be added into the scale barrel 11 to simulate stratum information. Geological material and fluid may be placed in the formation simulation zone and the azimuth scale zone, respectively. Then the probe of the nuclear magnetic resonance detection device is placed in the area for placing materials in the scale barrel 11, the nuclear magnetic resonance detection device can be suspended in the scale barrel 11, a magnet in the probe of the nuclear magnetic resonance detection device can emit a static magnetic field for polarizing spin hydrogen protons, and an antenna in the probe can emit a radio frequency field for turning the spin hydrogen protons. After the radio frequency field is removed, the spinning hydrogen protons begin to precess along the static magnetic field, so that a nuclear magnetic resonance induction signal is generated, and the nuclear magnetic resonance detection device can detect the nuclear magnetic resonance induction signal. Since the geological material and the fluid in the scale drum 11 are placed therein by the user for simulating the formation, the condition of the simulated formation can be known in advance. After the nuclear magnetic resonance induction signal is obtained, the signal can correspond to the simulated stratum, so that the purpose of scaling the nuclear magnetic resonance detection device is achieved. When the nuclear magnetic resonance detection device is actually used for underground operation, the stratum condition can be reversely deduced according to the acquired induction signals.
Specifically, the scale device provided by the embodiment further comprises a rotating assembly 12, and the rotating assembly is arranged at the bottom of the scale barrel 11 and can drive the scale barrel 11 to rotate.
When the bottom layer is actually detected, the nuclear magnetic resonance detection device is driven to go down the well while drilling, and when the drill rotates, the nuclear magnetic resonance detection device can be used for measuring the formation condition. The rotating component 12 drives the scale barrel 11 to rotate, and the nuclear magnetic resonance detection device is not moved, so that the condition that the underground nuclear magnetic resonance detection device rotates while drilling can be simulated.
Further, the calibration apparatus provided in this embodiment further includes a bracket assembly 13. The nmr detector may be suspended from the carriage assembly 13 so that the nmr detector can be suspended in the scale drum 11. For example, the rotating assembly 12 may be placed on a plane, the scale drum 11 may be placed on the rotating assembly 12, and the nmr detecting device may be suspended by the bracket assembly 13.
In practical applications, the bracket assembly 13 includes a first moving portion 131, a second moving portion 132, and a fixing portion 133.
The fixing portion 133 may be placed on the ground or a plane, and the fixing portion 133 may specifically include two fixing plates, and the two fixing plates may be placed on the ground in parallel.
The second moving portion 132 is slidably connected to the fixing portion 133, and the second moving portion 132 may include two second flat plates, one of which may be disposed perpendicular to one of the fixed plates, and the two second flat plates are disposed in parallel. The second plate can be connected with the fixed plate in a sliding mode, and the second plate can slide along the direction of the fixed plate.
Specifically, the first moving portion 131 is slidably connected to the second moving portion 132. The first moving part 131 includes a first plate having one end connected to one of the second plates and the other end connected to the other second plate. The two ends of the first flat plate can be respectively connected with the two second flat plates in a sliding mode, and the first flat plate can slide along the direction of the second flat plates.
Further, the support assembly 13 further includes a force arm 134, a first end of the force arm 134 is slidably connected to the first moving portion 131, and a second end of the force arm 134 is configured to be connected to the nmr detecting device.
In practical applications, the arm 134 can slide on the first moving part 131 in the direction of the first moving part 131, the first moving part 131 can slide on the second moving part 132 in the direction of the second moving part 132, and the second moving part 132 can slide on the fixing part 133 in the direction of the fixing part 133. The extending directions of the first moving part 131, the second moving part 132, and the fixing part 133 are perpendicular to each other.
The position of the force arm 134 can be adjusted through the sliding connection relation in the bracket component, and then the position of the nuclear magnetic resonance detection device is adjusted.
Specifically, the scale barrel 11 comprises a first hollow barrel 111 and a second hollow barrel 112, and the first hollow barrel 111 is coaxially sleeved in the second hollow barrel 112. The nuclear magnetic resonance detection device is suspended in the first hollow barrel 111.
Further, the scale drum 11 may be placed below the force arm 134, so that the nmr detecting device can be suspended in the first hollow drum 111 of the scale drum 11. If the nmr detecting device cannot be placed in the first hollow barrel 111, the arm 134 can be adjusted by the bracket assembly to be placed in the first hollow barrel 111.
In practical applications, geological materials such as sand, soil, stones or fluid can be added into the second hollow barrel 112 for simulating formation information. Furthermore, the known geological formation information can be measured by the nuclear magnetic resonance detection device, so that the nuclear magnetic resonance detection device can be calibrated.
The calibration device provided by the embodiment can restore the underground motion state of the nuclear magnetic resonance logging device while drilling, and can test in different motion states according to actual conditions, so that the nuclear magnetic resonance logging device can be calibrated more accurately.
Fig. 2 is a block diagram of a bracket assembly according to an exemplary embodiment of the present invention.
As shown in fig. 2, the fixing portion 133 includes two parallel fixing plates 1331, and the two fixing plates 1331 may be placed on the ground to support the entire bracket assembly 13.
The second moving part 132 includes two parallel second moving plates 1321, and one second moving plate 1321 is connected to one fixed plate 1331 through a slide plate 1332; the second moving plate 1321 is located on a plane perpendicular to the fixed plate 1331.
As shown in fig. 2, the second moving plate 1321 may be vertically disposed, the fixing plate 1331 may be horizontally disposed, and one second moving plate 1321 and one fixing plate 1331 may form a 90-degree bracket. If the fixing plate 1331 is placed on the ground, the second moving plate 1321 is perpendicular to the ground.
The first moving part 131 includes a first moving plate 1311, and both ends of the first moving plate 1311 are connected to the two second moving plates 1321 through second sliders 1322, respectively. The first moving plate 1311 is disposed perpendicular to the second moving plate 1321, that is, the first moving plate 1311, the second moving plate 1321, and the fixed plate 1331 are perpendicular to each other in the x, y, and z directions, respectively.
Specifically, the first moving plate 1311 may be slid in the y direction by two second sliders 1322. The two second moving plates 1321 may be slid in the z direction by the slide plate 1332.
Further, the bracket assembly 13 includes a moment arm 134 having a first end slidably connected to the first moving portion 131 via a first slider 1312. The first end of the particular moment arm 134 may be coupled to the first moving plate 1311 via the first slider 1312.
The arm 134 can slide along the x direction by the first slider 1312, and the arm 134 can be controlled to move along the x, y and z directions by the bracket assembly 13. The second end of the arm 134 may be connected to the nmr probe so that the nmr probe can be suspended in the first hollow barrel 111.
The fixed plate 1331 is provided with a sliding slot, the sliding plate 1332 is matched with the sliding slot to slide, and the sliding plate 1332 can slide along the sliding slot, so as to drive the second moving plate 1321 connected with the sliding plate 1332 to move along the sliding slot direction, that is, along the z direction.
The fixing plate 1331 is further provided with a third threaded rod 1333, and fixing members may be provided at both ends of the fixing plate 1331 to fix the third threaded rod 1333.
The third threaded rod 1333 is disposed between the fixing plate 1331 and the sliding plate 1332, and the motor can be connected to two ends of the third threaded rod 1333, and the third threaded rod can vibrate under the driving of the motor, so as to drive the sliding plate 1332 to vibrate. The third threaded rod 1333 vibrates the slide plate 1332, which can vibrate the arm 134, thereby simulating the vibration of the drill in the z-direction.
The second moving portion 132 is provided with a second threaded rod 1323, the second sliding block 1322 is sleeved on the second threaded rod 1323, and the second threaded rod 1323 is driven by the motor to vibrate and drive the second sliding block 1322 to vibrate. The two ends of the second threaded rod 1323 may be connected to a motor, which is driven by the motor to vibrate, thereby driving the second slider 1322 to vibrate. The second threaded rod 1323 drives the second slider 1322 to vibrate, so that the force arm 134 can also vibrate, thereby simulating the vibration of the drill in the y direction.
The first moving portion 131 is provided with a first threaded rod 1313, the first sliding block 1312 is sleeved on the first threaded rod 1313, and the first threaded rod 1313 is driven by the motor to vibrate and drive the first sliding block 1312 to vibrate. The two ends of the first threaded rod 1313 may be connected to a motor, which is driven by the motor to vibrate, so as to drive the first sliding block 1312 to vibrate. The first threaded rod 1313 vibrates the first slider 1312, so that the arm 134 can vibrate, and vibration generated in the x direction under the drill can be simulated.
Fig. 3 is a cross-sectional view illustrating a scale drum according to an exemplary embodiment of the present invention.
As shown in fig. 3, a nuclear magnetic resonance detecting apparatus 31 is suspended in the scale bucket 11.
Fig. 4 is a block diagram illustrating a rotating assembly according to an exemplary embodiment of the present invention.
As shown in FIG. 4, in one embodiment, the rotating assembly 12 includes:
a rotating support column 121, a rotating disk 122 and a base 123 which are connected in sequence. The rotary support 121 is connected to the lower end of the scale drum 11.
The base 123 may be used as a support for placement on the ground or a platform. The base 123 is provided with a rotating disc 122, and the rotating disc 122 can drive the rotating support column 121 arranged thereon to rotate, so as to drive the scale drum 11 connected with the rotating support column 121 to rotate. Thereby simulating the scenario when the drill is rotated downhole.
Fig. 5 is a structural view of a scale drum according to an exemplary embodiment of the present invention.
As shown in fig. 5, the scale drum 11 includes a first hollow drum 111 and a second hollow drum 112, and the first hollow drum 111 is coaxially sleeved in the second hollow drum 112. The section of the first hollow barrel 111 is smaller than that of the second hollow barrel 112, so that the first hollow barrel 111 can be sleeved inside the second hollow barrel 112.
Specifically, the height of the first hollow barrel 111 and the height of the second hollow barrel 112 may be the same. The first hollow barrel 111 is sleeved in the second hollow barrel 112, and the first hollow barrel and the second hollow barrel can directly form a cavity. It is also possible to align the edges of the first hollow barrel 111 and the second hollow barrel 112 such that the same side edge of the first hollow barrel 111, the second hollow barrel 112 extends between the end faces, i.e. the top and bottom faces of the barrel 11, in a direction perpendicular to the central axis of the two barrels.
Further, the first hollow barrel 111 and the second hollow barrel 112 may be cylindrical hollow barrels. The cavity between the first hollow barrel 111 and the second hollow barrel 112 may be a circular cylindrical cavity.
In practical application, the cavity between the first hollow barrel 111 and the second hollow barrel 112 is divided into a stratum simulation area 113 and an azimuth scale area 114 along a dividing plane perpendicular to the top surface of the second hollow barrel 112.
The top surface of the second hollow barrel 112 is an end surface extending from the edge of one end of the second hollow barrel. The cavity can be divided along a dividing plane perpendicular to the top surface to obtain two cavities, namely a formation simulation area 113 and an azimuth scale area 114.
Specifically, the cross-sections of the formation simulation area 113 and the azimuth scale area 114 may be the same. Two partition plates may be provided, which are disposed between the first hollow barrel 111 and the second hollow barrel 112, and which are disposed perpendicular to the top surface of the scale barrel 11. And the two partitions are on a straight line passing through the axis of the scale drum 11.
Further, the height of the partition is the same as that of the scale barrel 11, so that the divided stratum simulation area 113 and the azimuth scale area 114 are not communicated, and the partition can be flush with the bottom surface and the top surface of the scale barrel 11.
In practical applications, the formation simulation area 113 includes a plurality of grids 115 that are not connected to each other and run through from the axial direction of the second hollow barrel 112.
The height of the lattice 115 is the same as that of the second hollow barrel 112, that is, the lattice 115 is a structure which penetrates up and down along the axial direction of the scale barrel.
Specifically, lattice baffles may be provided in the formation simulation area 113, the lattice baffles being crossed with each other and having a height corresponding to that of the second hollow barrel 112, thereby dividing the formation simulation area 113 into a plurality of lattices.
Further, the plurality of lattices 115 may have the same cross-sectional size, and specifically, may be lattices having a square cross-section.
In practical applications, geological materials such as sand, soil, stones or fluid may be added to the grid 115 of the formation simulation area 113 for simulating formation information. The materials added to the lattices 115 may be the same or different.
Wherein, the orientation scale region 114 comprises a plurality of fan-shaped grooves 116 which are not communicated with each other and are communicated along the axial direction of the second hollow barrel 112.
Specifically, a sector groove partition plate may be disposed at a position between the first hollow barrel 111 and the second hollow barrel 112 in the azimuth scale section 114, and the height of the sector groove partition plate may be the same as that of the second hollow barrel 112, and the sector groove partition plate may be disposed perpendicular to the top surface of the second hollow barrel 112. The sector-shaped groove partition intersects the top surface of the second hollow barrel 112 at one edge, which may be along a line intersecting the axis of the second hollow barrel 112.
Further, the cross-sectional size of each scallop 116 may be the same.
In practical application, fluid such as water, oil, etc. can be added into the sector groove 116 for calibration of the nuclear magnetic resonance detection device.
The fluid filled in each sector groove 116 may be the same or different.
Specifically, in order to prevent the geological material or the liquid placed in the scale drum 11 from flowing out, a drum cover fitted to the cavity between the first hollow drum 111 and the second hollow drum 112 may be provided. The middle of the barrel cover is provided with a hole with the same section as the first hollow barrel 111.
Further, two barrel covers can be arranged and respectively cover the top surface and the bottom surface of the scale barrel 11, and a barrel cover can also be arranged and arranged on the top surface of the scale barrel 11, and a bottom plate can be arranged on the bottom surface of the scale barrel 11 and used for sealing the cavity between the first hollow barrel 111 and the second hollow barrel 112. The bottom plate, the first hollow barrel 111 and the second hollow barrel 112 can be integrally formed.
In practice, geological material and fluid may be placed in the formation simulation zone 113 and azimuth scale zone 114, respectively. Then, the probe of the nuclear magnetic resonance detection device is placed in the first hollow barrel 111, the magnet in the probe can emit a static magnetic field for polarizing the spin hydrogen protons, and the antenna in the probe can emit a radio frequency field for turning the spin hydrogen protons. After the radio frequency field is removed, the spinning hydrogen protons begin to precess along the static magnetic field, so that a nuclear magnetic resonance induction signal is generated, and the nuclear magnetic resonance detection device can detect the nuclear magnetic resonance induction signal. Since the geological material and the fluid in the scale drum 11 are placed therein by the user for simulating the formation, the condition of the simulated formation can be known in advance. After the nuclear magnetic resonance induction signal is obtained, the signal can correspond to the simulated stratum, so that the purpose of scaling the nuclear magnetic resonance detection device is achieved. When the nuclear magnetic resonance detection device is actually used for underground operation, the stratum condition can be reversely deduced according to the acquired induction signals.
Wherein, can pack into different materials in scale bucket 11 to the geological conditions of simulation difference, nuclear magnetic resonance detecting device's probe also can be placed in the different positions of first hollow bucket 111, and then can also carry out the position scale to detecting device. Because the relative positions of the liquid and the probe are different, the sensing signals received by the detection device are different, and when the detection device is calibrated, the relative positions of the liquid and the probe are known, so that the corresponding relation between the sensing signals and the relative positions of the liquid and the probe can be obtained.
In the nuclear magnetic resonance spectrum calibration device for the heterogeneous formation provided by the embodiment, the calibration device comprises a calibration device and a calibration device; the scale barrel comprises a first hollow barrel and a second hollow barrel, and the first hollow barrel is coaxially sleeved in the second hollow barrel; the cavity between the first hollow barrel and the second hollow barrel is divided into a stratum simulation area and an azimuth scale area along a dividing surface vertical to the top surface of the second hollow barrel; the stratum simulation area comprises a plurality of grids which are not communicated with each other and are communicated along the axial direction of the second hollow barrel; the azimuth scale area comprises a plurality of fan-shaped grooves which are not communicated with each other and are communicated along the axial direction of the second hollow barrel. A plurality of lattices for placing geological materials and a plurality of fan-shaped grooves for placing fluid are arranged in the scale barrel, so that the stratum condition can be accurately simulated, and the more accurate scale nuclear magnetic resonance detection device is provided.
Wherein, the second hollow barrel 112 is made of non-magnetic metal material.
The metal material may make the second hollow barrel 112 more robust and less prone to the penetration of interferents from the outside into the barrel. In addition, the second hollow barrel 112 made of non-magnetic material does not interfere the magnetic field emitted by the nuclear magnetic resonance detection device.
Fig. 6 is a schematic structural diagram of a shielding cover plate according to an exemplary embodiment of the present invention; fig. 7 is an exploded view of the shield cover shown in fig. 6.
As shown in fig. 6, the calibration apparatus for nuclear magnetic resonance spectrum of heterogeneous formation provided by this embodiment further includes a shielding cover plate 61 engaged with the top of the calibration barrel 11, and a hole having the same size as the cross-section of the inner ring of the first hollow barrel 111 is disposed in the center of the shielding cover plate 61.
The shielding cover plate 61 can be buckled at the top of the scale barrel 11, and a hole with the same size as the inner ring section of the first hollow barrel 111 is formed in the center of the shielding cover plate 61, so that the nuclear magnetic resonance detection device can be inserted into the first hollow barrel 111 through the hole to detect the simulated stratum in the scale barrel 11.
Specifically, the size of the section of the central hole of the shielding cover plate 61 is the same as that of the section of the first hollow barrel 111, so that the nuclear magnetic resonance detection device can enter the first hollow barrel 111 more smoothly, and the problem that the shielding cover plate 61 is not closed tightly can not be caused.
Specifically, when the cavity between the first hollow barrel 111 and the second hollow barrel 112 is divided into the stratum simulation area 113 and the azimuth scale area 114, the shielding cover 61 may also be divided into two parts, namely, a stratum simulation area cover 611 and an azimuth scale area cover 612. The surface of the stratum simulation area cover plate 611 is matched with the cross section of the stratum simulation area 113 and can cover the stratum simulation area 113, and the stratum simulation area cover plate 611 and the second hollow barrel 161 can be clamped, so that the stratum simulation area cover plate 611 can cover the stratum simulation area 113. Similarly, the azimuth scale section cover 612 can also fit the cross section of the azimuth scale section 114 and snap fit onto the second hollow barrel 161 to cover the azimuth scale section 114.
As shown in fig. 7, in the shield cover 61 provided in this embodiment, the formation simulation area cover 611 and the azimuth scale area cover 612 are detachably connected. In actual use, if the user only wants to replace the fluid in the azimuth scale section 114, the azimuth scale section cover 612 can be opened only, so that the formation simulation area cover 611 still snaps on the second hollow barrel 112, thereby facilitating the replacement of the fluid in the azimuth scale section 114.
The formation simulation zone cover plate 611 is provided with a grid piston 613 which cooperates with the grid 115. The number of cells in the formation simulation area 113 is equal to the number of cells in the cover 611 of the formation simulation area, and the number of the cell pistons 613 corresponds to the position of the cells 115. When the grid piston 613 is pulled out, the grid 115 corresponding thereto communicates with the external environment, thereby facilitating the user to replace the geological material in the grid 115. For example, if the user only wants to replace the geological material in one of the lattices 115, the lattice piston 613 corresponding to the lattice 115 may be pulled out, the geological material therein may be poured out, and new geological material may be added. Since the grid pistons 613 of the other grids 115 are not pulled out, the geological material in the other grids 115 is not changed during the above operation.
The cross-section of the grid piston 613 may be circular with a diameter smaller than the short side of the grid 115.
Further, the azimuth scale section cover plate 612 may also be provided with a sector groove piston 614 that cooperates with the sector groove 116. The azimuth scale section 114 has a plurality of lattices, a plurality of sector pistons 614 are arranged on the azimuth scale section cover plate 612, and the positions of the sector pistons 614 correspond to the positions of the sector grooves 116. When piston 614 is withdrawn, its corresponding sector 116 is in communication with the external environment, thereby facilitating the user's replacement of the fluid material in sector 116. For example, if a user desires to replace the fluid material in only one of the scallops 116, the corresponding scalloped piston 614 of the scallops 116 may be removed and the fluid material therein may be poured and a new fluid material may be added. Because sector groove piston 614 of the other sector groove 116 is not pulled out, the fluid material in the other sector groove 116 is not changed during the above operation.
In practice, a circular sector groove piston 614 may be provided.
Here, the lattice piston 613 and the sector groove piston 614 may be provided at the same time, or only one of them may be provided.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description above, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A nuclear magnetic resonance spectrum calibration device for a heterogeneous formation, comprising:
the scale drum, the rotating assembly and the bracket assembly;
the lower end of the scale barrel is connected with the rotating assembly, and the rotating assembly drives the scale barrel to rotate axially when rotating;
the bracket assembly comprises a first moving part, a second moving part and a fixing part;
the second moving part is connected with the fixed part in a sliding mode, and the first moving part is connected with the second moving part in a sliding mode;
the bracket assembly further comprises a force arm, a first end of the force arm is connected with the first moving part in a sliding mode, and a second end of the force arm is used for being connected with a nuclear magnetic resonance detection device;
the scale barrel comprises a first hollow barrel and a second hollow barrel, and the first hollow barrel is coaxially sleeved in the second hollow barrel; the second hollow barrel is made of a non-magnetic metal material;
the nuclear magnetic resonance detection device is suspended in the first hollow barrel;
the cavity between the first hollow barrel and the second hollow barrel is divided into a stratum simulation area and an azimuth scale area along a dividing plane vertical to the top surface of the second hollow barrel;
the stratum simulation area comprises a plurality of grids which are not communicated with each other and are communicated along the axial direction of the second hollow barrel;
the azimuth scale area comprises a plurality of fan-shaped grooves which are not communicated with each other and are communicated along the axial direction of the second hollow barrel;
the device further comprises: the shielding cover plate is matched with the top of the scale barrel, and a hole with the same size as the section of the first hollow barrel is formed in the center of the shielding cover plate;
the shielding cover plate comprises a stratum simulation area cover plate and an azimuth scale area cover plate, and the stratum simulation area cover plate is detachably connected with the azimuth scale area cover plate;
and a grid piston matched with the grid is arranged on the stratum simulation area cover plate, and/or a sector groove piston matched with the sector groove is arranged on the azimuth scale area cover plate.
2. The device of claim 1, wherein the fixation portion comprises two parallel fixation plates;
the second moving part comprises two parallel second moving plates, and one second moving plate is connected with one fixed plate through a sliding plate; the second moving plate is positioned on a plane perpendicular to the fixed plate;
the first moving part comprises a first moving plate, and two ends of the first moving plate are respectively connected with the two second moving plates through second sliders.
3. The device of claim 1, wherein the first end of the moment arm is slidably coupled to the first movable portion via a first slide.
4. The apparatus of claim 1, wherein the rotating assembly comprises:
the rotary support, the rotary disc and the base are connected in sequence;
the rotary support is connected with the lower end of the scale barrel.
5. The device according to claim 2, wherein the fixed plate is provided with a sliding groove, and the sliding plate is matched with the sliding groove to slide;
the fixed plate is also provided with a third threaded rod, the third threaded rod is arranged between the fixed plate and the sliding plate, and the third threaded rod is used for generating vibration under the driving of a motor and driving the sliding plate to vibrate;
the second moving portion is provided with a second threaded rod, the second sliding block is sleeved on the second threaded rod, and the second threaded rod is used for vibrating under the driving of the motor and driving the second sliding block to vibrate.
6. The device as claimed in claim 3, wherein the first moving portion is provided with a first threaded rod, the first sliding block is sleeved on the first threaded rod, and the first threaded rod is driven by a motor to vibrate and drive the first sliding block to vibrate.
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