Detection performance testing device for array induction logging instrument

Abstract

The invention discloses an array induction logging instrument detection performance testing device which comprises a testing box, a testing cavity is formed in the testing box, an opening is formed in the top of the testing cavity of the testing box, a sealing cover is installed on the outer side of the opening of the testing box, a testing hole is formed in the center of the sealing cover, and a rock stratum simulation assembly is installed in the testing cavity. A supporting seat is arranged at the bottom of the rock stratum simulation assembly, the bottom of the supporting seat is fixedly installed at the bottom of the testing cavity, a heating assembly is installed on the outer side of the testing box, a liquid box is installed on one side of the exterior of the heating assembly, and the output end of the liquid box is arranged at the bottom of the testing cavity. By simulating the rock stratum structure and liquid under the actual stratum and the state of high temperature in the rock stratum, the detection performance test requirements of the array induction logging instrument under different environments and temperatures are met, so that the detection performance deficiency of the array induction logging instrument is conveniently found and improved; and stable and reliable work of the array induction logging instrument in an underground environment is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of well logging instrument performance testing, and in particular relates to a detection performance testing device for an array induction well logging instrument. Background Art

[0002] Well logging, also known as geophysical logging or oil logging, or logging for short, is a method of measuring geophysical parameters using the geophysical properties of rock formations, such as electrochemical properties, electrical properties, acoustic properties, and radioactivity. It is one of the applied geophysical methods (including gravity, magnetic, electrical, seismic, and well logging). When drilling for oil, well logging, also known as completion electrical logging, must be carried out after drilling to the designed well depth to obtain various petroleum geological and engineering technical data as the original data for completion and development of oil fields. Usually, various logging instruments manufactured using physical principles such as electricity, magnetism, sound, heat, and nuclear power, such as array induction logging instruments, are lowered into the well by logging cables, so that ground electrical measuring instruments can continuously record various parameters that change with depth along the wellbore, and identify underground rock formations such as oil, gas, water layers, coal seams, metal deposits, etc. through curves representing such parameters. In the oil logging industry, it is necessary to test the detection performance of array induction logging instruments, but existing testing devices cannot simulate the rock structure under different strata and the state of different liquids in the well at high temperatures, resulting in poor detection performance test results for array induction logging instruments. Therefore, there is an urgent need for an array induction logging instrument detection performance testing device to solve the above problems. Summary of the invention

[0003] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a detection performance testing device for an array induction logging instrument.

[0004] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0005] A detection performance test device for an array induction logging instrument comprises a test box, wherein a test cavity is provided in the test box, an opening is provided at the top of the test cavity, a sealing cover is installed on the outer side of the opening, a test hole is provided in the center of the sealing cover, a formation simulation component is installed in the test cavity, a support seat is provided at the bottom of the formation simulation component, the bottom of the support seat is fixedly installed on the bottom of the test cavity, non-slip feet are installed on both sides of the bottom of the test box, a heating component is installed on the outer side of the test box, a liquid box is installed on the outer side of the heating component, and an output end of the liquid box is arranged at the bottom of the test cavity.

[0006] It is further defined that the rock formation simulation component includes a plurality of rock blocks, the plurality of rock blocks are stacked in an overlapping manner from bottom to top, a base is installed at the bottom of the rock block, a traction rod is installed at the top of the base, a top cover is connected to the top of the traction rod, the top cover is installed on the top of the rock block, the top cover is provided with a mounting hole at the corresponding traction rod, and the top of the traction rod is arranged in the mounting hole. Such a structural design is also convenient for taking out and replacing the rock block as a whole after testing by simulating a real rock formation.

[0007] It is further defined that the rock block is made by processing natural rock as a whole, and the rock block can also be made of natural mudstone, sandstone, granite, and coal. Such a structural design is convenient for simulating different rock layers and improving the test effect.

[0008] It is further defined that a thread groove is provided on the top of the traction rod, and the traction rod is locked and connected with a lifting ring through the thread groove. Such a structural design facilitates lifting the rock formation simulation component through the lifting ring.

[0009] It is further defined that the bottom of the support seat is installed at the bottom of the test cavity by thread locking. Such a structural design enables the support seat to be fixedly installed, and provides a stable supporting effect for the rock formation simulation component.

[0010] It is further defined that the heating assembly includes a heat preservation jacket installed outside the test box, a heater is installed in the heat preservation jacket, and the heater is in contact with the outer wall of the test box. Such a structural design can simulate the downhole environmental temperature to facilitate the performance test.

[0011] It is further defined that the heater is an electromagnetic heater. Such a structural design adopts the principle of electromagnetic induction for heating, has high efficiency, fast heating, simple operation, and no risk of electric leakage.

[0012] It is further defined that the test box is made of a material with good thermal conductivity, and the test box is also coated with thermal grease at the connection with the heater. Such a structural design improves the thermal conductivity efficiency, so that the temperature in the test box can rise faster.

[0013] It is further defined that an output pump is installed at the output end of the liquid box, the output end of the output pump is connected to an output pipe, the output end of the output pipe is installed on one side of the bottom of the test chamber, a back-drawing pump is also installed at the input end of the liquid box, the back-drawing pump is connected to a back-drawing pipe, the input end of the back-drawing pipe is installed on the other side of the bottom of the test chamber, and a one-way valve is installed in both the output pipe and the back-drawing pipe. Such a structural design facilitates the delivery of different liquids into the test box to simulate the actual state and facilitate testing.

[0014] It is further defined that an air compressor is installed on the top of the liquid box, the output end of the air compressor is connected to the test chamber, and a stop valve is also installed on the output end of the air compressor. Such a structural design can achieve a pressurization effect and simulate the pressure downhole, so that the logging instrument can be more in line with the actual test.

[0015] The beneficial effects of the present invention are as follows: the present invention can simulate the rock structure under the formation by setting up a rock simulation component, can simulate the rock structures under different formations by replacing the rock simulation component, can simulate different liquids underground by adding different liquids, and can simulate the state of high temperature underground by using the heating component. The present invention meets the demand for testing the detection performance of array induction logging instruments in different environments and temperatures by simulating the rock structure and liquid under the actual formation and the state of high temperature in the rock formation, so as to find and improve the insufficient detection performance of the array induction logging instrument, and ensure the stable and reliable operation of the array induction logging instrument in the underground environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0017] Figure 1 This is a schematic diagram of the axial structure of a detection performance testing device for an array induction logging instrument according to an embodiment of the present invention;

[0018] Figure 2 A schematic cross-sectional structure diagram of a detection performance testing device for an array induction logging instrument according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of a test state of a detection performance test device for an array induction logging instrument according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a liquid box of a detection performance testing device for an array induction logging instrument according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of a rock formation simulation component of a detection performance testing device for an array induction logging instrument according to an embodiment of the present invention;

[0022] The main component symbols are described as follows:

[0023] Test box 1, test chamber 2, sealing cover 3, test hole 4, rock formation simulation component 5, support seat 6, anti-slip foot 7, heating component 8, liquid box 9, rock block 10, base 11, traction rod 12, top cover 13, mounting hole 14, threaded groove 15, lifting ring 16, insulation jacket 17, heater 18, output pump 19, output pipe 20, back pump 21, back pipe 22, one-way valve 23, air compressor 24. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Embodiment 1, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a detection performance test device for an array induction logging instrument is provided, wherein a test chamber 2 is provided in a test box 1, an opening is provided at the top of the test chamber 2, a sealing cover 3 is installed on the outer side of the opening of the test box 1, a test hole 4 is provided in the center of the sealing cover 3, a formation simulation component 5 is installed in the test chamber 2, a support seat 6 is provided at the bottom of the formation simulation component 5, the bottom of the support seat 6 is fixedly installed on the bottom of the test chamber 2, non-slip feet 7 are installed on both sides of the bottom of the test box 1, a heating component 8 is installed on the outer side of the test box 1, a liquid tank 9 is installed on the outer side of the heating component 8, and the output end of the liquid tank 9 is arranged at the bottom of the test chamber 2.

[0026] In this embodiment, when it is necessary to test the detection performance of the array induction logging instrument, the rock formation simulation component 5 is first installed in the test cavity 2 of the test box 1 and placed on the support seat 6, and then the sealing cover 3 is covered so that the sealing cover 3 is pressed on the rock formation simulation component 5, so that the rock formation simulation component 5 is fixed, and then liquid, such as oil, is input into the bottom of the test cavity 2 through the liquid tank 9, and the heating component 8 is controlled to start at the same time to increase the internal ambient temperature of the test box 1, thereby simulating the actual state, and finally drilling is carried out through the test hole 4 on the sealing cover 3. After drilling to the designed well depth of the rock formation simulation component 5, the array induction logging instrument is used for testing, and the rock formation structure and liquid under the actual formation and the state of high temperature in the rock formation are simulated, so as to meet the test requirements for the detection performance of the array induction logging instrument.

[0027] Embodiment 2, as Figure 2 , Figure 3 and Figure 5 As shown, this embodiment adds the following structure on the basis of embodiment 1, the rock formation simulation component 5 includes a plurality of rock blocks 10, and the plurality of rock blocks 10 are stacked in an overlapping manner from bottom to top, a base 11 is installed at the bottom of the rock block 10, a traction rod 12 is installed on the top of the base 11, a top cover 13 is connected to the top of the traction rod 12, the top cover 13 is installed on the top of the rock block 10, and a mounting hole 14 is provided in the top cover 13 corresponding to the traction rod 12, and the top of the traction rod 12 is arranged in the mounting hole 14.

[0028] In this embodiment, during installation, the rock blocks 10 are stacked on the base 11 from bottom to top in sequence, and then the top cover 13 is covered on the top of the rock blocks 10. The base 11 is lifted by the traction rod 12 and placed on the support seat 6 in the test chamber 2. Finally, the sealing cover 3 is covered so that the sealing cover 3 is pressed on the top cover 13, thereby applying a pressing force to the top cover 13 to ensure the stability of the rock blocks 10, so as to facilitate subsequent drilling and testing work. When taking out, the rock block 10 can be taken out as a whole through the base 11, the traction rod 12 and the top cover 13, which is convenient for replacement and cleaning, and improves the use effect.

[0029] Embodiment 3, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 2. The rock block 10 is made by integrally processing natural rock. The rock block 10 can also be made of natural mudstone, sandstone, granite, or coal.

[0030] In this embodiment, the rock blocks 10 made of different materials are used to simulate the structures of different strata, so that the structures are more in line with the actual conditions, the test is more real and accurate, and the test effect is improved.

[0031] Embodiment 4, as Figure 2 , Figure 3 and Figure 5 As shown, this embodiment adds the following structure on the basis of the embodiment 1: a thread groove 15 is provided on the top of the traction rod 12, and the traction rod 12 is locked and connected with a lifting ring 16 through the thread groove 15.

[0032] In this embodiment, when the rock formation simulation component 5 needs to be installed or removed, the rock formation simulation component 5 can be lifted as a whole by installing a lifting ring 16 in the threaded groove 15 at the top of the traction rod 12, which is convenient for overall installation and disassembly.

[0033] Embodiment 5, as Figure 2 As shown, this embodiment adds the following structure on the basis of the embodiment 1, the bottom of the support seat 6 is installed on the bottom of the test cavity 2 by thread locking.

[0034] In this embodiment, during installation, the support seat 6 is installed at the bottom of the test chamber 2 by threaded locking, so that the support seat 6 can be fixedly installed. After the bottom of the rock formation simulation component 5 is placed on the top of the support seat 6, the support seat 6 can play a stable supporting effect.

[0035] Embodiment 6, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 1: the heating component 8 includes a heat preservation jacket 17 installed on the outside of the test box 1, a heater 18 is installed in the heat preservation jacket 17, and the heater 18 is in contact with the outer wall of the test box 1.

[0036] In this embodiment, when in use, the heater 18 is controlled to start, the test box 1 is heated to change the temperature in the test cavity 2, and the outer side of the heater 18 is wrapped with a heat-insulating jacket 17 to avoid heat loss and maintain uniform temperature distribution, thereby simulating the underground environmental temperature.

[0037] Embodiment 7, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of embodiment 1, and the heater 18 adopts an electromagnetic heater.

[0038] In this embodiment, an electromagnetic heater is used to heat using the electromagnetic induction principle; the efficiency is high, the temperature rises quickly, the operation is simple, and there is no risk of leakage.

[0039] Embodiment 8, as Figure 2 and Figure 3 As shown, this embodiment adds the following structure on the basis of the embodiment 1: the test box 1 is made of a material with good thermal conductivity, and the connection between the test box 1 and the heater 18 is also coated with thermal conductive silicone grease.

[0040] In this embodiment, when the heater 18 is heated, the heat is quickly transferred to the test box 1 through the thermal grease, so that the test box 1 changes the temperature in the test cavity 2 after heating, thereby simulating the actual underground environmental temperature for subsequent testing.

[0041] Embodiment 9, as Figure 2 , Figure 3 and Figure 4 As shown, this embodiment adds the following structure on the basis of embodiment 1: an output pump 19 is installed at the output end of the liquid tank 9, and the output end of the output pump 19 is connected to an output pipe 20, and the output end of the output pipe 20 is installed on one side of the bottom of the test chamber 2; a back-drawing pump 21 is also installed at the input end of the liquid tank 9, and the back-drawing pump 21 is connected to a back-drawing pipe 22, and the input end of the back-drawing pipe 22 is installed on the other side of the bottom of the test chamber 2, and a one-way valve 23 is installed in both the output pipe 20 and the back-drawing pipe 22.

[0042] In this embodiment, when in use, the liquid in the liquid tank 9 is pumped out by the output pump 19 and transported to the output pipe 20, and then input to the bottom of the test box 1 through the one-way valve 23 on the output pipe 20, so as to test the detection performance of the array induction logging instrument. After the test, the liquid in the test box 1 is pumped into the pumping pipe 22 through the one-way valve 23 by the pumping pump 21, and finally transported to the liquid tank 9 for storage. By replacing the liquid in the liquid tank 9, different liquids in the underground rock formations are simulated.

[0043] Embodiment 10, as Figure 4As shown, this embodiment adds the following structure on the basis of embodiment 1: an air compressor 24 is installed on the top of the liquid tank 9, the output end of the air compressor 24 is connected to the test chamber 2, and a stop valve is also installed on the output end of the air compressor 24.

[0044] In this embodiment, while the liquid box 9 adds liquid to the test box 1, the air compressor 24 is used to pressurize the test chamber 2, and a stop valve is used to adjust the pressure, thereby further simulating the underground pressure, being more in line with reality, and improving the test effect of the detection performance of the array induction logging instrument.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A detection performance testing device for an array induction logging instrument, characterized in that: The invention comprises a test box (1), wherein a test cavity (2) is provided in the test box (1), wherein an opening is provided at the top of the test cavity (2), wherein a sealing cover (3) is installed on the outside of the opening of the test box (1), wherein a test hole (4) is provided at the center of the sealing cover (3), wherein a rock formation simulation component (5) is installed in the test cavity (2), wherein a support seat (6) is provided at the bottom of the rock formation simulation component (5), wherein the bottom of the support seat (6) is fixedly installed at the bottom of the test cavity (2), wherein anti-slip feet (7) are installed at both sides of the bottom of the test box (1), wherein a heating component (8) is installed on the outside of the test box (1), wherein a liquid box (9) is installed on the outer side of the heating component (8), wherein the output end of the liquid box (9) is arranged at the bottom of the test cavity (2).

2. The detection performance testing device of an array induction logging instrument according to claim 1, characterized in that: The rock formation simulation component (5) comprises a plurality of rock blocks (10), wherein the plurality of rock blocks (10) are stacked in an overlapping manner from bottom to top, a base (11) is installed at the bottom of the rock block (10), a traction rod (12) is installed at the top of the base (11), a top cover (13) is connected to the top of the traction rod (12), the top cover (13) is installed on the top of the rock block (10), the top cover (13) is provided with a mounting hole (14) at a position corresponding to the traction rod (12), and the top of the traction rod (12) is arranged in the mounting hole (14).

3. The detection performance testing device of an array induction logging instrument according to claim 2, characterized in that: The rock block (10) is made by integrally processing natural rock. The rock block (10) can also be made of natural mudstone, sandstone, granite, or coal.

4. The detection performance testing device of an array induction logging instrument according to claim 3, characterized in that: A thread groove (15) is provided on the top of the traction rod (12), and the traction rod (12) is locked and connected to a lifting ring (16) via the thread groove (15).

5. The detection performance testing device of an array induction logging instrument according to claim 4, characterized in that: The bottom of the support seat (6) is installed on the bottom of the test cavity (2) by thread locking.

6. The detection performance testing device of array induction logging instrument according to claim 5, characterized in that: The heating component (8) comprises a heat-insulating jacket (17) installed on the outside of the test box (1), a heater (18) is installed in the heat-insulating jacket (17), and the heater (18) is in contact with the outer wall of the test box (1).

7. The detection performance testing device of array induction logging instrument according to claim 6, characterized in that: The heater (18) is an electromagnetic heater.

8. The detection performance testing device of array induction logging instrument according to claim 7, characterized in that: The test box (1) is made of a material with good thermal conductivity, and thermal conductive silicone grease is applied to the connection between the test box (1) and the heater (18).

9. The detection performance testing device of array induction logging instrument according to claim 8, characterized in that: An output pump (19) is installed at the output end of the liquid tank (9), and the output end of the output pump (19) is connected to an output pipe (20), and the output end of the output pipe (20) is installed on one side of the bottom of the test chamber (2). A back-drawing pump (21) is also installed at the input end of the liquid tank (9), and the back-drawing pump (21) is connected to a back-drawing pipe (22), and the input end of the back-drawing pipe (22) is installed on the other side of the bottom of the test chamber (2). Both the output pipe (20) and the back-drawing pipe (22) are installed with a one-way valve (23).

10. The detection performance testing device of array induction logging instrument according to claim 9, characterized in that: An air compressor (24) is installed on the top of the liquid box (9), the output end of the air compressor (24) is connected to the test chamber (2), and a stop valve is also installed on the output end of the air compressor (24).

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