Logging device calibration method and logging device calibration system

Abstract

This invention discloses a method and system for calibrating logging equipment. The calibration method includes the following steps: S1, placing the core sample to be tested inside a test chamber; S2, filling the test chamber with liquid; S3, pressurizing the test chamber to a predetermined pressure, allowing the liquid inside the chamber to permeate through the core sample and exit the test chamber; S4, collecting the exited liquid and calculating the mobility of the core sample; S5, placing the logging equipment at the drain port of the test chamber and repeating steps S2-S3 to obtain the mobility of the core sample detected by the logging equipment; S6, comparing the mobility of the core sample obtained in step S5 with that obtained in step S4; S7, adjusting the probe correlation coefficient of the logging equipment according to the comparison result until the mobility of the core sample measured by the logging equipment is consistent with the mobility of the core sample obtained in step S4. This invention can realize the data reliability verification and error value adjustment of the mobility parameters obtained by the logging equipment.

Description

Technical Field

[0001] This invention relates to the field of well logging equipment calibration technology, and in particular to a well logging equipment calibration method and a well logging equipment calibration system. Background Technology

[0002] In oil and gas exploration, formation pressure and mobility are crucial parameters for reservoir evaluation. Currently, these parameters are mostly obtained using logging equipment in the open hole section downhole. However, logging equipment from different manufacturers often differs in setting area and pumping methods. Therefore, data read from the same wellbore and test point by different logging equipment often varies, especially in tight formations, where mobility values ​​from different types of logging equipment can differ by several to tens of times. This poses a significant challenge to reservoir evaluation. Therefore, it is necessary to design a method and system for calibrating logging equipment on the surface to address the technical problem of the inability to reliably verify the pressure and mobility parameters obtained from logging equipment.

[0003] In the existing technology, there are some formation pressure simulation systems that simulate the formation and formation pressure of cores with different lithologies in the laboratory, realize the ground test and simulation test in the development process of logging equipment, and can verify the accuracy and reliability of the formation pressure parameters obtained by the logging equipment.

[0004] However, the existing technologies mentioned above have technical defects and shortcomings in parameter verification. Using the existing formation pressure simulation system, the accuracy and reliability of the formation pressure parameters measured by the logging equipment can only be verified, but the technical problem of verifying the reliability of the core mobility parameters cannot be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method and system for calibrating logging equipment, so as to calibrate the flow parameters obtained by logging equipment.

[0006] The technical solution adopted by this invention to solve its technical problem is: to provide a method for calibrating logging equipment, comprising the following steps:

[0007] S1. Place the core testing module containing the core to be tested into the test chamber, and connect the core testing module to the drain port of the test chamber;

[0008] S2. Fill the test chamber with liquid through the filling port until the test chamber is full;

[0009] S3. Inflate the air inlet of the test chamber to a predetermined pressure, thereby driving the liquid in the test chamber into the core testing module and through the core to be tested, and then discharge it from the drain outlet.

[0010] S4. Collect the liquid seeping from the drain outlet, and calculate the mobility of the core sample by combining the liquid seepage velocity and the predetermined pressure.

[0011] S5. Place the logging equipment at the drain port of the test chamber, repeat the above steps S2-S3, start the logging equipment, and obtain the flow rate of the core sample detected by the logging equipment.

[0012] S6. Compare the flowability of the core sample obtained in step S5 with the flowability of the core sample obtained in step S4.

[0013] S7. Adjust the correlation coefficient of the logging equipment probe according to the comparison results until the mobility of the core sample obtained by the logging equipment is consistent with the mobility of the core sample obtained in step S4.

[0014] Preferably, step S4 includes the following steps:

[0015] S4.1 Collect the liquid seeping from the drain outlet;

[0016] S4.2 Record the time and amount of seepage of the collected liquid;

[0017] S4.3. The flowability λ1 of the core sample to be tested is calculated according to the following formula (I):

[0018]

[0019] In Equation (I), λ1 is the mobility of the core sample; P1 is the predetermined pressure in step S3, in MPa; 0.001 is the water column pressure conversion factor; H is the vertical distance from the air inlet to the end of the core sample away from the liquid discharge direction in step S3, in meters; 0.101 is the standard atmospheric pressure, in MPa; T is the liquid seepage time in step S4.2, in seconds; and S is the cross-sectional area of ​​the core sample, in cm². 2 V represents the amount of liquid that seeps out in step S4.2, in cm³. 3 L represents the length of the core sample to be tested, in cm.

[0020] Preferably, in step S1, one surface of the test chamber is provided with an arc surface corresponding to the inner surface of the oil well, and the core testing module is positioned inside the test chamber on the inner side of the arc surface; the drain outlet is opened on the arc surface.

[0021] In step S4.1, a drainage device is provided outside the drain port.

[0022] Preferably, in step S5, the mobility λ2 of the core sample obtained by the logging equipment is obtained by the following formula (ii):

[0023]

[0024] In Equation (II), λ2 is the core mobility obtained by the logging equipment; C is the probe correlation coefficient currently used by the logging equipment; and q is the volume of the pumped liquid read from the logging equipment, in cm³. 3 μ is the viscosity of the formation fluid, which is 1 under experimental conditions; ΔP is the pressure difference read from the logging equipment when it pumps the fluid, in MPa.

[0025] Preferably, in step S7, adjusting the logging equipment includes adjusting the correlation coefficient of the probe used by the logging equipment; step S7 includes the following steps:

[0026] S7.1 Calculate the target probe correlation coefficient C according to the following formula (iii). o :

[0027]

[0028] In Equation (III), λ1 is the mobility of the core sample obtained in step S4.3; C is the probe correlation coefficient mentioned in step 5; and λ2 is the mobility of the core sample obtained by the logging equipment in step 5.

[0029] S7.2 Adjust the probe correlation coefficient of the logging equipment to the target probe correlation coefficient C. o ;

[0030] S7.3 Repeat steps S5-S6 once or more until λ2 = λ1.

[0031] Preferably, in step S2, the filling unit is connected to the filling port of the test chamber;

[0032] The liquid filling unit includes a liquid injection pump, a first connecting pipe connected between the liquid injection pump and the liquid filling port, and a first pressure detection module connected to the first connecting pipe; after the liquid injection pump is started, it pumps liquid into the liquid filling port through the first connecting pipe until the liquid fills the test chamber.

[0033] Preferably, in step S3, the inflation unit is connected to the inflation port of the test chamber;

[0034] The inflation unit includes a gas compressor, a second connecting pipe connecting the gas compressor and the inflation port, a gas storage tank, a second pressure detection module, and a pressure regulation module;

[0035] The gas storage tank is installed on the second connecting pipeline. The gas storage tank stores the pressurized gas generated by the gas compressor and delivers it to the test chamber through the second connecting pipeline. The pressurized gas is brought to a predetermined pressure through the cooperation of the second pressure detection module and the pressure regulation module.

[0036] The present invention also provides a logging equipment calibration system; for use in any of the logging equipment calibration methods described above; the logging equipment calibration system includes a sealed test chamber, a core testing module for placing the core sample to be tested, a liquid filling unit, and an air filling unit;

[0037] The test chamber is equipped with a liquid filling port, an air filling port, and a liquid draining port; the core testing module is located inside the test chamber and is connected to the liquid draining port.

[0038] The liquid filling unit is connected to the liquid filling port and is used to fill the test chamber with liquid;

[0039] The inflation unit is connected to the inflation port and is used to inflate and pressurize the test chamber, thereby driving the liquid inside the test chamber into the core testing module and permeating through the core to be tested, and seeping out from the drain port.

[0040] Preferably, one surface of the test chamber is provided with an arc surface corresponding to the inner surface of the oil well; the drain outlet is located on the arc surface.

[0041] Preferably, the core testing module includes a cylinder for holding the core to be tested, at least one sealing element, and at least one support element;

[0042] The cylinder is open at both ends, connecting the test chamber and the drain outlet;

[0043] The support is disposed inside the end of the cylinder near the drain port, and supports the core to be tested inside the cylinder.

[0044] The sealing element is disposed inside the opposite end of the cylinder to seal the gap between the inner surface of the cylinder and the rock core to be tested.

[0045] The beneficial effects of this invention are: it is used to calibrate well logging equipment on the ground, and can verify the reliability of the mobility parameters obtained by the well logging equipment and adjust the error value, so as to provide objective and accurate evaluation data for oilfield reservoir evaluation in the process of oilfield exploration and development. Attached Figure Description

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0047] Figure 1 This is a schematic diagram of the connection of a logging equipment calibration system according to an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the combination of the test box and the core testing module in a logging equipment calibration system according to an embodiment of the present invention;

[0049] Figure 3 This is a front view of the test chamber structure in a well logging equipment calibration system according to an embodiment of the present invention;

[0050] Figure 4 This is an exploded view of the core testing module structure in a well logging equipment calibration system according to an embodiment of the present invention;

[0051] Figure 5 This is a structural diagram of the core testing module in a logging equipment calibration system according to an embodiment of the present invention;

[0052] Figure 6 This is a schematic diagram of the working status of logging equipment in a logging equipment calibration system according to an embodiment of the present invention. Detailed Implementation

[0053] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0054] like Figure 1-3 As shown, a logging equipment calibration system according to an embodiment of the present invention includes a sealed test chamber 1, a core testing module 4 for placing the core sample 21 to be tested, a fluid filling unit 3, a pressure compensation unit 2 for increasing the pressure of the test chamber 1, and a fluid discharge unit 14.

[0055] The core testing module 4 is placed inside the test chamber 1. The pressure compensation unit 2, the liquid filling unit 3, and the fluid discharge unit 14 are connected to the test chamber 1. The liquid filling unit 3 is used to fill the test chamber 1 with liquid, such as water, until the chamber is completely filled. The pressure compensation unit 2 is used to fill the test chamber 1 with gas, increasing the internal pressure and allowing the liquid to enter the core testing module 4, permeate through the core sample 21, and then exit the core testing module 4. The fluid discharge unit 14 is used to discharge the fluid from the test chamber 1.

[0056] Specifically, such as Figure 2-3 As shown, one surface of the test chamber 1 is provided with an arc surface 25, which corresponds to the inner surface of the oil well and can simulate the oil seepage surface of the oil well where the core is located in actual operation. The core testing module 4 is set inside the test chamber 1 and positioned on the arc surface 25 of the test chamber. The arc surface 25 is further provided with a drain port 28, and the core testing module 4 is connected to the drain port 28, so that the drain port 28 and the core testing module 4 are in relative communication, for discharging the liquid seeping from the core testing module 4.

[0057] To better collect the liquid discharged from the drain port 28, a drainage device can be provided on the outside of the drain port 28 to prevent the liquid in the test chamber 1 from being diverted along the arc surface 25. The drainage device can be a cylindrical structure or similar structure installed along the outer periphery of the drain port 28.

[0058] Corresponding to the connection between the liquid filling unit 3 and the pressure compensation unit 2, the test chamber 1 is provided with a liquid filling port 16 for connecting liquid and a gas filling port 15 for connecting gas. The liquid filling port 16 is connected to the liquid filling unit 3, and the gas filling port 15 is connected to the pressure compensation unit 2.

[0059] like Figure 2-3 As shown, the test chamber 1 may further include a chamber 34 and a cover 26. One side of the chamber 34 is open to form an open side, and the cover 26 can be opened and closed to seal the open side of the chamber 34, so that the test chamber 1 forms an openable and closable chamber structure. The openable and closable setting facilitates the placement and removal of the core testing module 4, cleaning of the inside of the chamber 34, and other work.

[0060] Regarding the closable nature of the lid 26 on the box body, alternatively, the lid 26 can be set independently of the box body 34. After the lid 26 is fitted onto the open side of the box body 34, it is then fastened to the box body 34 by the latch 27. Alternatively, the lid 26 can be hinged to the box body 34 on one side, allowing the lid 26 to rotate relative to the box body 34 to open and close. The opposite side of the lid 26 is then detachably fastened to the box body 34 by the latch 27. Alternatively, the lid 26 can be connected to the box body 34 by interference fit, snap-fit ​​steps, or other methods.

[0061] like Figure 3-5 As shown, the core testing module 4 may include a cylinder 23, at least one seal 20, and at least one support 22. The cylinder 23 is used to hold the core to be tested 21, and the cylinder is open at both ends, connecting the test chamber 1 and the drain port 28. Under pressure differential conditions, liquid in the test chamber 1 can enter the core to be tested 21 from one open end of the cylinder 23, permeate through the core to be tested 21, and then be discharged sequentially from the other open end of the cylinder 23 and the drain port 28.

[0062] The support member 22 is located inside the end of the cylinder 23 near the drain port 28, supporting the test core 21 inside the cylinder 23 to prevent the test core 21 from falling out of the cylinder 23. The sealing member 20 is located inside the opposite end of the cylinder 23, sealing the gap between the inner surface of the cylinder 23 and the test core 21, preventing liquid in the test chamber 1 from passing through the gap between the cylinder 23 and the test core 21, thus affecting the subsequent verification results.

[0063] Specifically, the cylinder 23 can be a steel cylinder, which can be, but is not limited to, a circular cylinder. To achieve both support and positioning of the core sample 21 without hindering the permeation and discharge of liquid through the core sample 21, the support member 22 includes at least one filter screen, the shape of which can correspond to the inner circumference of the cylinder 23. A protruding positioning step 24 is provided inside the cylinder 23, and the support member 22 is positioned on the positioning step 24, thus confining the support member 22 within the cylinder 23.

[0064] The positioning step 24 is a flange extending horizontally from the inner surface of the lower end of the cylinder 23 towards the center of the cylinder. Alternatively, the positioning step 24 can be an annular flange or multiple spaced block flanges, which can be used to support and position the core sample 21 to be tested. The support member 22 is located between the core sample 21 to be tested and the positioning step 24, which can prevent the core sample 21 to be tested from falling out of the cylinder 23, and can also buffer the interaction force generated when the core sample 21 to be tested is in direct contact with the positioning step 24.

[0065] In this embodiment, as Figure 1 As shown, the filling unit 3 includes a liquid injection pump 10, a first connecting pipe 32 connected between the liquid injection pump 10 and the filling port 16, a first pressure detection module 12 disposed on the first connecting pipe 32, and a first switching valve 11 disposed on the first connecting pipe 32.

[0066] Specifically, the first pressure detection module 12 can be a hydraulic gauge. The first switching valve 11 can be a ball valve. The injection pump 10 continuously injects liquid into the test chamber 1. Alternatively, the liquid injected into the test chamber 1 by the injection pump 10 can be water, mud, crude oil, etc. Specifically, the liquid enters the first connecting pipe 32, and the first switching valve 11 is connected after the injection pump 10, controlling the liquid input into the first connecting pipe 32. The first pressure detection module 12 is located after the first switching valve 11 and is used to detect the pressure of the liquid in the first connecting pipe 32. The end of the first connecting pipe 32 is provided with a hydraulic quick connector 29, which can be connected to the pre-reserved filling port 16 on the test chamber 1, thereby transferring the liquid pumped into the first connecting pipe 32 by the injection pump 10 into the test chamber 1.

[0067] In this embodiment, as Figure 1 As shown, the pressure compensation unit 2 includes a pressure input source, a second connecting pipe 31 connecting the pressure input source and the test chamber 1, and a pressure regulating system installed on the second connecting pipe 31. The pressure regulating system includes a second switching valve 7, a balancing valve 8, and a second pressure detection module 9.

[0068] Specifically, the second pressure detection module 9 can be a high-precision electronic display pressure gauge with an accuracy requirement of three decimal places to ensure that the pressure of the pressurized gas input into the test chamber 1 is accurately controlled.

[0069] The pressure input source includes a gas compressor 5 and a gas storage tank 6. The gas compressor 5 pumps compressed gas into the gas storage tank 6. The second switching valve 7 is the control switch for gas input. The balance valve 8 can adjust the gas pressure in the second connecting pipe 31. The gas pressure in the second connecting pipe 31 is read by the digital display in the second pressure detection module 9. The end of the second connecting pipe 31 is provided with a quick connector 30, which can be connected to the pre-reserved air inlet 15 on the test chamber 1, so that the compressed gas generated by the gas compressor 5 can be transmitted to the test chamber 1 through the second connecting pipe 31.

[0070] In this embodiment, as Figure 1 As shown, the fluid discharge unit 14 includes a third connecting pipe 33 and a third switching valve 13 connected to the third connecting pipe 33. Liquid and gas in the test chamber 1 can flow from the fluid discharge port 17 through the third connecting pipe 33 and be discharged outside the test chamber 1.

[0071] The logging equipment verification method of the present invention is used to verify logging equipment and can be implemented using the aforementioned logging equipment verification system. (Reference) Figure 1-6 The verification method may include the following steps:

[0072] S1. Place the core testing module 4 containing the core to be tested 21 into the test chamber 1, and connect the core testing module 4 to the drain port 28 of the test chamber 1.

[0073] S2. Fill the test chamber 1 with liquid through the filling port 16 until the test chamber 1 is full;

[0074] Specifically, liquid can be injected into the test chamber 1 from the open side first, then the cover 26 is closed and locked. The test chamber 1 is connected to the liquid filling unit 3, and the first switch valve 11 is opened. When the pressure value on the first pressure detection module 12 starts to rise, it indicates that the test chamber 1 is full of liquid.

[0075] S3. Pressurize the air inlet 15 of the test chamber 1 to a predetermined pressure, so that the liquid in the test chamber 1 enters the core testing module 4 and permeates through the core 21 to be tested, and is discharged from the drain outlet 28.

[0076] The predetermined pressure affects the seepage velocity of the liquid discharged from the drain port 28. The specific value of the predetermined pressure is influenced by various factors, including the properties of the liquid used in the test, especially its fluidity; the properties of the test core 21, especially its permeability; the atmospheric pressure of the local environment during the test; and the accuracy of the selected second pressure detection module 9. In practice, the predetermined pressure must meet the condition that the liquid in the test chamber 1 seeps through the test core 21 and is discharged outside the test chamber 1, and can be read by the second pressure detection module 9.

[0077] S4. Collect the liquid seeping from the drain outlet 28, and calculate the flow rate of the core sample 21 to be tested by combining the liquid seepage velocity and the predetermined pressure.

[0078] Step S4 includes the following steps:

[0079] S4.1 Collect the liquid seeping from the drain outlet;

[0080] S4.2 Record the time and amount of seepage of the collected liquid;

[0081] The flowability λ1 of the core sample to be tested is calculated according to the following formula (I):

[0082]

[0083] In Equation (I), λ1 is the mobility of the core sample 21 to be tested; P1 is the predetermined pressure in step S3, in MPa; 0.001 is the water column pressure conversion factor; H is the vertical distance from the air inlet 15 in step S3 to the end of the core sample 21 away from the liquid discharge direction, in meters; 0.101 is the standard atmospheric pressure, in MPa; T is the liquid seepage time in step S4.2, in seconds; and S is the cross-sectional area of ​​the core sample 21 to be tested, in cm². 2 V represents the amount of liquid that seeps out in step S4.2, in cm³. 3 L represents the length of the core sample 21 to be tested, in cm.

[0084] In step S4.1, a drainage device is provided outside the drain port 28. This drainage device helps to better collect the liquid discharged from the drain port 28 and prevents the liquid from diverting along the arc surface 25, which would affect the recording of the seepage time and amount of the collected liquid. The drainage device can be a structure such as a cylinder arranged along the outer periphery of the drain port 28.

[0085] S5, such as Figure 6 As shown, the logging equipment 18 is placed at the drain port 28 of the test chamber 1. The above steps S2-S3 are repeated. The test probe 19 of the logging equipment is aligned with the drain port 28. The logging equipment 18 is started to perform suction measurement to obtain the flow rate of the core 21 to be tested obtained on the logging equipment 18.

[0086] Preferably, the mobility λ2 of the core sample 21 obtained by the logging equipment 18 is obtained by the following formula (ii):

[0087]

[0088] In Equation (II), λ2 is the mobility of the core sample 21 obtained by the logging equipment; C is the correlation coefficient of the probe currently used by the logging equipment 18; and q is the volume of the pumped liquid read from the logging equipment, in cm³. 3μ is the viscosity of the formation fluid, which is 1 under experimental conditions; ΔP is the pressure difference read from the logging equipment when the fluid is pumped, in MPa.

[0089] S6. Compare the flowability of the core sample 21 to be tested in step S5 with the flowability of the core sample 21 to be tested obtained in step S4.

[0090] S7. Adjust the logging equipment 18 according to the comparison results (such as the difference) until the mobility of the core 21 to be tested obtained by the logging equipment 18 is consistent with the mobility of the core 21 to be tested obtained in step S4.

[0091] Preferably, in step S7, adjusting the logging equipment includes adjusting the probe correlation coefficient of the logging equipment; step S7 includes the following steps:

[0092] S7.1 Calculate the target probe correlation coefficient C according to the following formula (iii). o :

[0093]

[0094] In Equation (III), λ1 is the mobility of the core 21 to be tested calculated in step S4.3; C is the probe correlation coefficient mentioned in step 5; and λ2 is the mobility of the core 21 to be tested obtained by the logging equipment in step 5.

[0095] S7.2 Adjust the correlation coefficient of the logging equipment probe to the target probe correlation coefficient C. o ;

[0096] S7.3 Repeat steps S5-S6 once or more until λ2 = λ1.

[0097] To improve the accuracy of the verification, steps S2-S7 can be repeated once or more while gradually increasing or decreasing the predetermined pressure to improve the accuracy of the verification results.

[0098] The above description is only one specific embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method of calibrating a well logging apparatus, characterized by, The method comprises the following steps: S1, placing a core test module loaded with a core to be tested in a test box, and butting the core test module against a liquid discharge port of the test box; S2, filling a liquid into a liquid filling port of the test box until the liquid fills the test box; S3, filling gas into a gas filling port of the test box to a predetermined pressure, driving the liquid in the test box to enter the core test module, and penetrating through the core to be tested, and then seeping out from the liquid discharge port; S4, collecting the liquid seeping out from the liquid discharge port, and calculating the mobility of the core to be tested according to the liquid seepage velocity and the predetermined pressure; S5, placing a logging device at the liquid discharge port of the test box, repeating the steps S2-S3, starting the logging device, and obtaining the mobility of the core to be tested detected by the logging device; S6, comparing the mobility of the core to be tested obtained in the step S5 with the mobility of the core to be tested obtained in the step S4; S7, adjusting a probe correlation coefficient of the logging device according to the comparison result until the mobility of the core to be tested detected by the logging device is consistent with the mobility of the core to be tested obtained in the step S4.

2. The method of claim 1, wherein, The step S4 comprises the following steps: S4.1, collecting the liquid seeping out from the liquid discharge port; S4.2, recording the seepage time and the seepage amount of the collected liquid; S4.3, calculating the mobility λ1 of the core to be tested according to the following formula (I): λ1 (I) In the formula (I), λ1 is the mobility of the core to be tested; P1 is the predetermined pressure in the step S3, and the unit is MPa; 0.001 is a water column pressure conversion coefficient; H is the vertical distance from the gas filling port in the step S3 to the end of the core to be tested far from the liquid discharge direction, and the unit is m; 0.101 is a standard atmospheric pressure, and the unit is MPa; T is the seepage time of the liquid in the step S4.2, and the unit is s; S is the cross-sectional area of the core to be tested, and the unit is cm²; V is the seepage amount of the liquid in the step S4.2, and the unit is cm³; and L is the length of the core to be tested, and the unit is cm.

3. The method of claim 2, wherein, In the step S1, a surface of the test box is provided with an arc surface corresponding to the inner surface of an oil well, and the core test module is positioned on the inner side of the arc surface in the test box; and the liquid discharge port is arranged on the arc surface. In the step S4.1, a drainage device is arranged outside the liquid discharge port.

4. The method of claim 1-3, wherein, In the step S2, a liquid filling unit is connected to the liquid filling port of the test box. The liquid filling unit comprises a liquid injection pump, a first connecting pipeline connected between the liquid injection pump and the liquid filling port, and a first pressure detection module connected to the first connecting pipeline; after the liquid injection pump is started, the liquid is pumped into the liquid filling port through the first connecting pipeline until the liquid fills the test box.

5. The method of claim 1-3, wherein, In the step S3, a gas filling unit is connected to the gas filling port of the test box. The gas filling unit comprises a gas compressor, a second connecting pipeline connected between the gas compressor and the gas filling port, a gas storage tank, a second pressure detection module, and a pressure adjusting module. The gas tank is arranged on the second connecting pipeline, the gas tank stores the pressurized gas generated by the gas compressor and delivers the pressurized gas into the test box through the second connecting pipeline; the pressurized gas reaches the predetermined pressure through cooperation of the second pressure detection module and the pressure adjusting module.

6. A logging apparatus verification system characterized by, The logging equipment calibration method of any one of claims 1-3; the logging equipment calibration system comprises a sealed test box, a core test module for placing a core to be tested, a liquid filling unit and an air filling unit; The test box is respectively provided with a liquid filling port, an air filling port and a liquid discharge port; the core test module is arranged in the test box and is in opposite communication with the liquid discharge port; The liquid filling unit is connected with the liquid filling port and is used for filling liquid into the test box; The air filling unit is connected with the air filling port and is used for pressurizing the test box by air, driving the liquid in the test box to enter the core test module and penetrate through the core to be tested, and then seeping out from the liquid discharge port.

7. The logging equipment verification system of claim 6, wherein, One surface of the test box is provided with an arc surface corresponding to the inner surface of an oil well; the liquid discharge port is arranged on the arc surface.

8. The logging equipment verification system of claim 6, wherein, The core test module comprises a cylinder for placing the core to be tested, at least one sealing member and at least one supporting member; The cylinder is open at opposite two ends and is in communication with the test box and the liquid discharge port; The supporting member is arranged in one end of the cylinder close to the liquid discharge port and supports the core to be tested in the cylinder; The sealing member is arranged in the opposite end of the cylinder and seals the gap between the inner surface of the cylinder and the core to be tested.

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