A physical analog measuring device for a dielectric well-logging probe

Abstract

The application discloses a physical simulation measuring device for a dielectric logging detector, which comprises a main box body, a U-shaped tube assembly and a partition plate. A plurality of partition plates are arranged in the main box body to form a plurality of independent cavities, and the independent cavities are used for placing test media. The U-shaped tube assembly is arranged in the main box body and penetrates through the plurality of independent cavities. The U-shaped tube assembly is in a half-open state, and the opening of the U-shaped tube assembly is upwardly arranged in the main box body. The U-shaped tube assembly comprises an inner tube, an outer tube and a stopper. The inner tube is arranged in the outer tube, and a gap is arranged between the inner tube and the outer tube and is used for injecting test media. The stopper is arranged at the end of the inner tube and the outer tube to seal the end. The plurality of independent cavities are formed by arranging the partition plates in the main box body, and the U-shaped tube assembly can be measured under different media. The device can be used for ground simulation test and measurement of the detector of a dielectric logging instrument and a detector with a similar structure.

Description

Technical Field

[0001] This invention belongs to the field of downhole logging instruments for oil wells, specifically to a physical simulation measurement device for dielectric logging detectors. Background Technology

[0002] In the oil logging industry, the detector of a logging instrument is the core of the entire instrument. During oil logging, the logging instrument collects formation information by transmitting and receiving signals through the detector, thereby generating logging curves to achieve the purpose of reservoir exploration. Different logging instruments have different detector operating principles and require different data collection. Furthermore, the environment in which the logging instrument detector operates downhole is complex and various conditions may arise. Therefore, it is usually necessary to establish a physical simulation measurement device on the surface that simulates the environment in which the detector operates downhole. Tests are conducted on the detector within these physical simulation devices to verify its performance, thereby achieving simulation testing and data calibration of the logging instrument detector.

[0003] Existing physical simulation measurement devices for similar detectors are mainly conducted at calibrated test wells or simulated test wells in oil fields. Especially for physical simulation measurement work of dielectric logging instrument detectors, there is no separate, specific physical simulation measurement device available. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a physical simulation measurement device for dielectric logging detectors. This device solves the problems of the lack of physical simulation measurement devices for dielectric logging instrument detectors and the difficulty in fixing and quantifying experimental measurement and verification of detectors, thereby improving the quality and progress of detector and instrument development.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A physical simulation measurement device for dielectric logging detectors includes a main housing, a U-shaped tube assembly, and a partition.

[0007] The main housing has several partitions forming multiple independent cavities, which are used to place test media. The U-shaped tube assembly is located inside the main housing and passes through multiple independent cavities. The U-shaped tube assembly is semi-open and is placed inside the main housing with the opening facing upwards.

[0008] The U-shaped tube assembly includes an inner tube, an outer tube, and a stop block; the inner tube is disposed inside the outer tube, and a gap is provided between the inner tube and the outer tube for injecting test medium; the stop block is disposed at the ends of the inner tube and the outer tube for sealing.

[0009] Preferably, valves are provided at the bottom of each of the multiple independent cavities.

[0010] Preferably, a handle is provided on the outside of the main housing.

[0011] Preferably, the bottom of the main housing is provided with several bases.

[0012] Preferably, the gap between the inner tube and the outer tube is larger than the probe diameter of the detector.

[0013] Preferably, the thickness of the main housing and the partitions is greater than 10mm.

[0014] Preferably, the main housing and several partitions are made of high-strength insulating material.

[0015] Preferably, the main housing and several partitions are connected by high-temperature melting welding.

[0016] Preferably, the top of the main housing is on the same plane as the top of the opening of the U-shaped tube assembly.

[0017] Preferably, the U-shaped tube assembly is connected to the main housing and several partitions by high-temperature melting welding.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects:

[0019] This invention provides a physical simulation measurement device for dielectric logging detectors. By setting partitions inside the main housing to form multiple independent cavities, it enables measurements of U-tube assemblies under different media. This device allows for ground simulation testing and measurement of dielectric logging instrument detectors and detectors with similar structures. The above work can be accomplished using this physical simulation measurement device, eliminating the need to transport the instrument to a calibration well manufacturer or oilfield simulation well for testing and calibration. This makes the physical simulation measurement of instrument detectors simple, fast, and convenient. Especially for detectors of new dielectric instruments under development that require repeated testing, verification, measurement, and calibration, using this physical simulation measurement device will greatly improve the overall instrument development progress, significantly reduce development costs, and improve the quality and progress of detector and instrument development. Attached Figure Description

[0020] Figure 1 A schematic diagram illustrating the effect of the physical simulation measurement device is provided for embodiments of the present invention;

[0021] Figure 2 A schematic diagram of the U-shaped tube assembly is provided for embodiments of the present invention;

[0022] Figure 3A front view (section) of a physical simulation measurement device structure is provided for embodiments of the present invention;

[0023] Figure 4 A top view of the physical simulation measurement device structure is provided for embodiments of the present invention;

[0024] Figure 5 A side view (section) of the physical simulation measurement device structure is provided for embodiments of the present invention;

[0025] In the attached diagram: 1 is the main housing; 2 is the U-shaped tube assembly; 3 is the partition; 4 is the handle; 5 is the valve; and 6 is the base. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0027] The present invention provides a physical simulation measurement device for dielectric logging detectors, comprising a main housing 1, a U-shaped tube assembly 2, several partitions 3, a handle 4, a valve 5, and a base 6.

[0028] The main housing 1 and several partitions 3 described in the above scheme are made of high-strength insulating material and have a certain pressure resistance. The main housing 1 and several partitions 3 divide the entire device into several independent cavities according to a certain ratio, so as to place different test media.

[0029] The U-tube assembly 2 described in the above scheme is a semi-open tubular assembly, consisting of inner and outer tubes and a stop block. The inner and outer tubes and the stop block form a cavity space that can be filled with the relevant medium to be tested. All components are made of high-strength insulating material with a certain pressure resistance. The dimensions of its inner tube and the U-shaped opening are slightly larger than the outer diameter of the detector so that the detector can be inserted and the detector probe can make good contact with the inner tube of the U-tube assembly 2. The detector is pushed by an external force, i.e., by the push-fit device built into the instrument itself, ensuring good contact between the detector probe and the inner surface of the U-tube. The detector is mounted on the instrument and is part of the instrument; the instrument itself is securely fixed by the instrument mounting bracket. The U-shaped tube assembly 2 is firmly installed on the main housing 1 and several partitions 3. The lower part of its outer tube is in contact with the medium in each independent cavity so that the detector can perform well. The U-shaped opening of the U-shaped tube assembly 2 faces upward so that the detector can be inserted from the top. The inside of the U-shaped tube assembly 2 is generally a mud-like medium. The medium in each independent cavity inside the main housing 1 is an oil-water mixture with different specific gravities and contents, or it can be a mixture of other rock characteristics or water.

[0030] Each of the several independent cavities described in the above scheme is equipped with a valve 5 at its lowest point, so as to facilitate the replacement of different media during the detector simulation test.

[0031] The handle 4 described in the above scheme is securely installed on the outside of the main housing 1, which facilitates the rapid movement and use of the physical simulation measurement device.

[0032] The main housing 1 described above is fitted with several bases 6 at its bottom to ensure the entire physical simulation measurement device is securely placed at the test site. During the detector simulation test, the entire device must not shake or become unstable.

[0033] All components described in the above scheme must be made of insulating materials and cannot be made of metal.

[0034] For simulation testing, measurement, and calibration of detectors used in dielectric logging instruments, especially new dielectric logging instruments under development, it is no longer necessary to move the logging instrument to the calibration test well manufacturer or the simulated test well in the oilfield for related simulation measurements. This physical simulation measurement device can easily and quickly complete the above tasks. This significantly reduces the various costs required for instrument simulation testing; greatly improves the maintenance and testing of logging instruments and the development progress of new instruments; and improves the quality and speed of detector and instrument development.

[0035] Example

[0036] The physical simulation measurement device of this invention consists of a main housing 1 divided into several independent cavities by several partitions 3. The main housing 1 and the partitions 3 are made of high-strength engineering plastic with a thickness of ≥10mm. They are welded together using a high-temperature melting process. The U-shaped tube assembly 2 consists of inner and outer tubes and positioning blocks. The inner and outer tubes and positioning blocks are also made of high-strength engineering plastic and are welded together using a high-temperature melting process. The lower part of the outer tube of the U-shaped tube assembly 2 is embedded inside the main housing 1 and the several independent cavities. They are also reliably welded together using a high-temperature melting process. The U-shaped opening of the U-shaped tube assembly faces upward to contact the air, while ensuring that the dielectric logging instrument detector can be smoothly inserted. At the same time, it ensures good contact between the detector probe (transmitting and receiving parts) and the lower part of the inner tube of the U-shaped tube assembly 2. In this embodiment, the length of the U-shaped tube assembly 2 is 1800mm and the inner diameter is 150mm.

[0037] High-pressure resistant valves 5 are installed at the bottom of each independent chamber to ensure convenient replacement of the liquid medium in the physical simulation measurement device. Handles 4 are installed on the outside of the main housing 1 for easy movement and use of the physical simulation measurement device. A base 6 is installed at the bottom of the main housing 1 to ensure that the entire physical simulation measurement device is securely placed in the testing site.

[0038] After multiple field tests, the embodiments of the physical simulation measurement device of this invention have demonstrated that its physical simulation measurement performance on the detector of dielectric logging instruments has reached the predetermined target. The test results meet the requirements of the design scheme. When using this physical simulation measurement device to perform simulation tests, verifications, calibrations, and other tasks on the instrument detector, the convenience and speed of the physical simulation measurement device have been consistently affirmed and recognized.

Claims

1. A physical analog measuring device for a dielectric well-logging probe, characterized by, The main box (1), the U-shaped tube assembly (2) and the partition plate (3) are included. The main box (1) is internally provided with a plurality of partition plates (3) to form a plurality of independent cavities for placing test medium; the U-shaped tube assembly (2) is arranged in the interior of the main box (1), and the U-shaped tube assembly (2) penetrates through the plurality of independent cavities; the U-shaped tube assembly (2) is in a half-opened state, and the opening of the U-shaped tube assembly (2) is upwardly arranged in the interior of the main box (1); the lower part of the outer tube is in contact with the medium in each independent cavity. The U-shaped tube assembly (2) comprises an inner tube, an outer tube and a stopper; the inner tube is arranged in the interior of the outer tube, and a gap is arranged between the inner tube and the outer tube for injecting mud-simulating test medium; the stopper is arranged at the end of the inner tube and the outer tube for sealing; the inner tube and the outer tube are both made of non-metallic insulating material; when in use, a probe is arranged in the inner tube.

2. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The bottom of each of the plurality of independent cavities is provided with a valve (5).

3. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The main box (1) is externally provided with a handle (4).

4. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The bottom of the main box (1) is provided with a plurality of bases (6).

5. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The gap between the inner tube and the outer tube is greater than the diameter of the probe of the probe.

6. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The thickness of the main box (1) and the plurality of partition plates (3) is greater than 10 mm.

7. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The main box (1) and the plurality of partition plates (3) are made of high-strength insulating material.

8. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The main box (1) and the plurality of partition plates (3) are connected by high-temperature melting process welding.

9. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The top of the main box (1) and the opening top of the U-shaped tube assembly (2) are in the same plane.

10. A physical analog measuring device for a dielectric well-logging probe according to claim 1, characterized in that, The U-shaped tube assembly (2) is connected with the main box (1) and the plurality of partition plates (3) by high-temperature melting process welding.

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