CN114876452A - Logging equipment calibration method and logging equipment calibration system - Google Patents

Abstract

The invention discloses a logging equipment checking method and a logging equipment checking system, wherein the logging equipment checking method comprises the following steps of: s1, placing the core to be tested in a test box body; s2, filling liquid into the test chamber; s3, inflating and pressurizing the test box body to a preset pressure to enable liquid in the box body to penetrate through the core to be tested and be discharged out of the test box body; s4, collecting the discharged liquid, and calculating to obtain the fluidity of the core to be measured; s5, placing the logging equipment at a liquid discharge port of the test box, repeating the steps S2-S3, and obtaining the fluidity of the core to be detected, which is detected on the logging equipment; s6, comparing the fluidity of the core to be tested obtained in the step S5 with the fluidity of the core to be tested obtained in the step S4; and S7, adjusting the correlation coefficient of the probe of the logging device according to the comparison result until the fluidity of the core to be measured by the logging device is consistent with the fluidity of the core to be measured in the step S4. The invention can realize data reliability verification and error value adjustment of the fluidity parameter acquired by the logging equipment.

Description

Well logging equipment calibration method and logging device calibration system

technical field

The invention relates to the technical field of logging equipment calibration, in particular to a logging device calibration method and a logging device calibration system.

Background technique

In the process of oil and gas exploration, two parameters of formation pressure and mobility are very important for reservoir evaluation. In most of the existing cases, these two parameters are recorded in the open-hole section of the downhole by using logging equipment. The logging equipment of different manufacturers often have different setting areas and suction methods, so the data read by different logging equipment in the same wellbore and the same test point are often different, especially in tight formations, different types of logging equipment. The mobility values read by the well equipment may differ from several times to dozens of times, which brings great trouble to the reservoir evaluation. Therefore, it is necessary to design a method and system for verifying the logging equipment on the ground. In order to solve the technical problem that the pressure and mobility parameters obtained by the logging equipment cannot be verified for data reliability.

In the prior art, there are some formation pressure simulation systems, which simulate the formation and formation pressure of cores with different lithologies in the room, realize the ground test and simulation test in the development process of the logging equipment, and can verify the formation pressure parameters obtained by the logging equipment. accuracy and reliability.

However, the above-mentioned existing technology has the technical defects and deficiencies of the singleness of parameter verification. Using the above-mentioned existing formation pressure simulation system, the data accuracy and reliability can only be verified for the formation pressure parameters measured by the logging equipment. Solve the technical problem of data reliability verification for core fluidity parameters.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a logging equipment calibration method and a logging device calibration system, so as to realize the calibration of the mobility parameters obtained by the logging device.

The technical solution adopted by the present invention to solve the technical problem is to provide a logging equipment calibration method, comprising the following steps:

S1, the core test module containing the core to be tested is placed in the test box, and the core test module is docked on the liquid outlet of the test box;

S2. Fill the liquid filling port of the test box with liquid until the liquid fills the test box;

S3, inflate and pressurize the inflation port of the test box to a predetermined pressure, drive the liquid in the test box to enter the core testing module, penetrate through the core to be tested, and discharge from the liquid outlet;

S4, collecting the liquid seeping out from the liquid outlet, and calculating the fluidity of the core to be measured in combination with the liquid seepage velocity and the predetermined pressure;

S5, placing the logging equipment at the liquid discharge port of the test box, repeating the above steps S2-S3, starting the logging equipment, and obtaining the fluidity of the core to be tested obtained by the logging equipment detection;

S6, compare the fluidity of the core to be measured obtained in step S5 with the fluidity of the core to be measured obtained in step S4;

S7. Adjust the probe correlation coefficient of the logging equipment according to the comparison result until the fluidity of the core to be tested obtained by the detection of the logging equipment is consistent with the fluidity of the core to be tested obtained in step S4.

Preferably, step S4 includes the following steps:

S4.1. Collect the liquid exuding from the liquid outlet;

S4.2. Record the exudation time and exudation amount of the collected liquid;

S4.3. Calculate and obtain the core fluidity λ ₁ to be measured according to the following formula (1):

In formula (1), λ ₁ is the fluidity of the core to be tested; P1 is the predetermined pressure in step S3, in MPa; 0.001 is the water column pressure conversion coefficient; The vertical distance of the measured core away from the liquid discharge direction, in m; 0.101 is the standard atmospheric pressure, in MPa; T is the seepage time of the liquid in step S4.2, in s; S is the cross section of the core to be measured Area, the unit is cm ² ; V is the seepage amount of the liquid in step S4.2, the unit is cm ³ ; L is the length of the core to be measured, the unit is cm.

Preferably, in step S1, a surface of the test box is provided with an arc surface corresponding to the inner surface of the oil well, and the core test module is positioned on the inner side of the arc surface in the test box; the liquid draining The mouth is opened on the arc surface;

In step S4.1, a drainage device is provided outside the liquid discharge port.

Preferably, in step S5, the fluidity λ ₂ of the core to be tested obtained by the logging equipment detection is obtained by the following formula (2):

In formula (2), λ ₂ is the fluidity of the core to be tested obtained by the logging equipment; C is the probe correlation coefficient currently used by the logging equipment; q is the value read from the logging equipment. The volume of the liquid to be pumped, in cm 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 the liquid is pumped, in Mpa.

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

S7.1. Calculate and obtain the target probe correlation coefficient C _o according to the following formula (3):

In formula (3), λ ₁ is the fluidity of the core to be tested obtained by calculation in step S4.3; C is the probe correlation coefficient described in step 5 _; core fluidity;

S7.2, adjust the probe correlation coefficient of the logging equipment to be the target probe correlation coefficient C _o ;

S7.3. Repeat steps S5-S6 once or more until λ ₂ =λ ₁ .

Preferably, in step S2, the liquid filling unit is connected to the liquid filling port of the test box;

The liquid filling unit includes a liquid injection pump, a first connection pipeline connected between the liquid injection pump and the liquid filling port, and a first pressure detection module connected to the first connection pipeline; the 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.

Preferably, in step S3, the inflatable unit is connected to the inflatable port of the test box;

The charging unit includes a gas compressor, a second connecting pipeline connected between the gas compressor and the charging port, a gas storage tank, a second pressure detection module and a pressure regulation module;

The gas storage tank is arranged on the second connecting pipeline, and the gas storage tank stores the pressurized gas generated by the gas compressor and transports it into the test box through the second connecting pipeline; The cooperation of the second pressure detection module and the pressure regulation module brings the pressurized gas to a predetermined pressure.

The present invention also provides a logging equipment calibration system; used for the logging equipment calibration method described in any one of the above; the logging equipment calibration system includes a closed test box for placing the core to be tested core test module, liquid filling unit and gas filling unit;

The test box body is respectively provided with a liquid filling port, an inflation port and a liquid discharge port; the core testing module is arranged in the test box body and communicates with the liquid discharge port relatively;

The liquid filling unit is connected to the liquid filling port, and is used for filling liquid into the test box;

The inflatable unit is connected to the inflatable port, used to inflate and pressurize the test box, drive the liquid in the test box to enter the core testing module, and penetrate through the core to be tested, from the discharge Liquid leaking out.

Preferably, a surface of the test box body is provided with an arc surface corresponding to the inner surface of the oil well; the liquid discharge port is arranged on the arc surface.

Preferably, the core testing module includes a cylinder for placing the core to be tested, at least one sealing member and at least one supporting member;

The opposite ends of the cylinder body are open, and communicate with the test box body and the liquid discharge port;

The support member is arranged in one end of the cylinder body close to the liquid discharge port, and supports the core to be tested in the cylinder body;

The sealing member is arranged in the opposite other end of the cylinder to seal the gap between the inner surface of the cylinder and the core to be tested.

The beneficial effects of the invention are as follows: it is used to verify the logging equipment on the ground, and can perform data reliability verification and error value adjustment on the mobility parameters obtained by the logging equipment, which is suitable for oilfield reservoirs in the process of oilfield exploration and development. Evaluation provides objective and accurate evaluation data.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic diagram of the connection of a logging equipment calibration system according to an embodiment of the present invention;

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

3 is a front view of the structure of a test box in a logging equipment calibration system according to an embodiment of the present invention;

FIG. 4 is a schematic diagram showing the decomposition of the core test module structure in the logging equipment calibration system according to an embodiment of the present invention;

5 is a structural diagram of a core test module in a logging equipment calibration system according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the working state of the logging equipment in the logging equipment calibration system according to an embodiment of the present invention.

Detailed ways

In order to have a clearer understanding of the technical features, objects and effects of the present invention, the specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in Figures 1-3, a logging equipment calibration system according to an embodiment of the present invention includes a closed test box 1, a core test module 4 for placing the core 21 to be tested, a liquid filling unit 3, a The test chamber 1 has a pressure compensation unit 2 and a fluid discharge unit 14 for increasing the pressure.

The core test module 4 is placed inside the test box 1 . The pressure compensation unit 2 , the liquid filling unit 3 and the fluid discharge unit 14 are respectively connected to the test box 1 . Among them, the liquid filling unit 3 is used to fill the liquid such as water into the test box 1, so that the inside of the test box 1 is filled with liquid. The pressure compensation unit 2 is used for filling the gas into the test box 1 to increase the internal pressure of the test box 1, so that the liquid can enter the core test module 4 and be discharged from the core test module 4 through the core to be tested 21 permeating through it. The fluid discharge unit 14 is used to discharge the fluid in the test chamber 1 .

Specifically, as shown in Figures 2-3, a surface of the test box 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 during actual work. The core test module 4 is arranged on the inside of the test box 1 and is positioned on the arc surface 25 of the test box. The arc surface 25 is further provided with a liquid discharge port 28, and the core test module 4 is docked on the liquid discharge port 28, so that the liquid is drained. The port 28 communicates with the core testing module 4 opposite to, and is used for discharging the liquid seeping from the core testing module 4 .

In order to better collect the liquid discharged from the liquid discharge port 28 , a drainage device may be provided on the outer side of the liquid discharge port 28 to prevent the liquid of the test box 1 from shunting along the arc surface 25 . The drainage device may be a structure such as a cylinder disposed along the outer periphery of the liquid discharge port 28 .

Corresponding to the connection between the liquid filling unit 3 and the pressure compensation unit 2, the test box 1 is provided with a liquid filling port 16 for accessing liquid and an inflating port 15 for accessing gas, and the liquid filling port 16 is connected with the liquid filling unit 3. , the inflation port 15 is connected to the pressure compensation unit 2 .

As shown in FIGS. 2-3 , the test box 1 may further include a box body 34 and a cover body 26 . One side of the box body 34 is opened to form an open side, and the cover body 26 can be opened and closed on the open side of the box body 34, so that the test box body 1 forms an openable and closable box structure, and the openable and closable arrangement is convenient for core testing. The picking and placing of the module 4 and the cleaning of the inside of the box 34 are performed.

As for the cover body 26 being openable and closable on the box body, as an option, the cover body 26 can be relatively independent from the box body 34 as a whole. The cover body 26 is fastened on the box body 34 . Alternatively, the cover body 26 can be hinged on the box body 34 on one side, so that the cover body 26 can be rotated relative to the box body 34 to realize opening and closing, and the opposite side of the cover body 26 can be detachably fastened to the box body through the lock 27 34 on. Alternatively, the cover body 26 may be connected to the box body 34 by means of interference fit, snap-fit steps, or the like.

As shown in FIGS. 3-5 , the core testing module 4 may include a barrel 23 , at least one seal 20 and at least one support 22 . The cylinder body 23 is used for placing the core 21 to be tested, and the opposite ends of the cylinder body are open to communicate with the test box 1 and the liquid discharge port 28 . The liquid in the test box 1 can enter the core 21 to be tested from an open end of the cylinder 23 under the condition of differential pressure, penetrate through the core 21 to be tested, and then sequentially from the opposite open end of the cylinder 23 and the liquid discharge port. 28 discharge.

The support member 22 is arranged in one end of the cylinder 23 close to the liquid discharge port 28 , and supports the core 21 to be tested in the cylinder 23 to prevent the core 21 to be tested from coming out of the cylinder 23 . The sealing member 20 is arranged in the opposite end of the cylinder 23 to seal the gap between the inner surface of the cylinder 23 and the core 21 to be tested, so as to prevent the liquid in the test box 1 from passing between the cylinder 23 and the core 21 to be tested. The gap between the two passes through, thereby affecting the subsequent verification results.

Specifically, the cylinder body 23 may be a steel cylinder, which may be, but is not limited to, a circular cylinder. In order to support and locate the core 21 to be tested without affecting the liquid permeating through the core 21 to be tested and then being discharged, the support 22 includes at least one filter screen, the shape of which can be set corresponding to the shape of the inner circumference of the cylinder 23 . The cylindrical body 23 is provided with a protruding positioning step 24 , the support member 22 is arranged on the positioning step 24 , and the support member 22 is restricted in the cylindrical body 23 by the positioning step 24 .

The positioning step 24 is a flange formed horizontally extending from the inner surface of the lower end portion of the cylindrical body 23 to the center of the cylindrical body. Alternatively, the positioning step 24 may be an annular flange or a plurality of block flanges distributed at intervals, which may be used for supporting and positioning the core 21 to be tested. The support member 22 is located between the core to be tested 21 and the positioning step 24 , which can prevent the core to be tested 21 from falling out of the cylinder 23 and also buffer the interaction force generated when the core to be tested 21 is in direct contact with the positioning step 24 .

In this embodiment, as shown in FIG. 1 , the liquid filling unit 3 includes a liquid injection pump 10 , a first connection pipeline 32 connected between the liquid injection pump 10 and the liquid filling port 16 , and a first connection pipeline 32 arranged on the first connection pipeline 32 . The first pressure detection module 12 on the upper side, and the first switch valve 11 arranged on the first connecting pipeline 32 .

Specifically, the first pressure detection module 12 may be a hydraulic pressure gauge. The first on-off valve 11 may be a ball valve. The liquid injection pump 10 can continuously inject liquid into the test box 1 . Alternatively, the liquid injected into the test box 1 by the liquid injection pump 10 may be water, mud, crude oil, or the like. Specifically, the liquid enters the first connecting line 32 , and the first on-off valve 11 is connected to the liquid injection pump 10 , which controls the liquid to be input into the first connecting line 32 . The first pressure detection module 12 is disposed behind the first on-off valve 11 and is used to detect the pressure of the liquid in the first connection pipeline 32 . The end of the first connecting line 32 is provided with a hydraulic quick connector 29, which can be connected to the liquid filling port 16 reserved on the test box 1, so as to transmit the liquid pumped into the first connecting line 32 by the liquid injection pump 10 to the test chamber. inside the box 1.

In this embodiment, as shown in FIG. 1 , the pressure compensation unit 2 includes a pressure input source, a second connecting pipeline 31 connected between the pressure input source and the test box 1 , and a second connecting pipeline 31 arranged on the second connecting pipeline 31 . Pressure regulation system. The pressure regulation system includes a second on-off valve 7 , a balance valve 8 and a second pressure detection module 9 .

Specifically, the second pressure detection module 9 can be a high-precision electronic display pressure gauge, and its accuracy is required to be three digits after the decimal point, so as to ensure that the pressure of the pressurized gas input into the test box 1 is accurately controlled;

The pressure input source includes a gas compressor 5 and a gas storage tank 6 . The gas compressor 5 pushes the compressed gas into the gas storage tank 6, the second switch valve 7 is a control switch for gas input, and the balance valve 8 can adjust the pressure of the gas in the second connection pipeline 31. The gas pressure is read out through the numbers displayed in the second pressure detection module 9, and the end of the second connection pipeline 31 is provided with a quick connector 30, which can be connected to the inflatable port 15 reserved on the test box 1, so as to connect the gas The compressed gas generated by the compressor 5 is transmitted into the test box 1 through the second connecting pipeline 31 .

In this embodiment, as shown in FIG. 1 , the fluid discharge unit 14 includes a third connecting pipeline 33 and a third on-off valve 13 connected to the third connecting pipeline 33 , and the liquid and gas in the test box 1 can be discharged from the fluid The port 17 flows out of the test box 1 through the third connecting pipeline 33 .

The method for calibrating logging equipment of the present invention is used for calibrating logging equipment, and can be implemented by the above-mentioned logging equipment calibrating system. Referring to Figures 1-6, the verification method may include the following steps:

S1, place the core test module 4 containing the core 21 to be tested in the test box 1, and dock the core test module 4 on the liquid outlet 28 of the test box 1;

S2. Fill the liquid filling port 16 of the test box 1 with liquid until the liquid fills the test box 1;

Specifically, the filling liquid can be injected from the open side of the test box 1, then the cover 26 is closed and locked, the test box 1 is connected to the liquid filling unit 3, and the first switch valve 11 is opened. When the pressure value on a pressure detection module 12 begins to rise, it indicates that the test box 1 is filled with liquid.

S3, inflate and pressurize the inflatable port 15 of the test box 1 to a predetermined pressure, drive the liquid in the test box 1 to enter the core testing module 4, and penetrate through the core 21 to be tested, and be discharged from the liquid discharge port 28;

The predetermined pressure affects the seepage velocity of the liquid discharged from the liquid discharge port 28. The specific value of the predetermined pressure is affected by a variety of factors. The specific influencing factors include the properties of the liquid selected for the test, especially the fluidity, and the properties of the core 21 to be tested selected for the test. In particular, the permeability, the atmospheric pressure of the local environment during the test, the accuracy of the selected second pressure detection module 9, and the like. In specific implementation, the predetermined pressure should satisfy the condition that the liquid in the test box 1 can seep through the core 21 to be tested and be discharged out of the test box 1 , and can be read by the second pressure detection module 9 .

S4, collecting the liquid seeping out from the liquid discharge port 28, and calculating the fluidity of the core 21 to be measured in combination with the liquid seepage velocity and the predetermined pressure;

Step S4 includes the following steps:

S4.1. Collect the liquid exuding from the liquid outlet;

S4.2. Record the exudation time and exudation amount of the collected liquid;

Calculate the core mobility λ ₁ to be tested according to the following formula (1):

In formula (1), λ ₁ is the fluidity of the core 21 to be tested; P1 is the predetermined pressure in step S3, in MPa; 0.001 is the water column pressure conversion coefficient; 21 The vertical distance from one end away from the liquid discharge direction, the unit is m; 0.101 is the standard atmospheric pressure, the unit is MPa; T is the seepage time of the liquid in step S4.2, the unit is s; S is the cross-sectional area of the core 21 to be tested, The unit is cm ² ; V is the seepage amount of the liquid in step S4.2, the unit is cm ³ ; L is the length of the core 21 to be measured, the unit is cm.

In step S4.1, a drainage device is provided outside the liquid discharge port 28. Through the setting of the drainage device, the liquid discharged from the liquid discharge port 28 can be better collected, so as to prevent the liquid from shunting along the arc surface 25 and affecting the recording of the collected liquid. The exudation time and amount of exudation. The drainage device may be a structure such as a cylinder disposed along the outer periphery of the liquid discharge port 28 .

S5. As shown in FIG. 6, place the logging equipment 18 at the liquid outlet 28 of the test box 1, repeat the above steps S2-S3, align the test probe 19 of the logging equipment with the liquid outlet 28, and start the logging The well equipment 18 performs suction measurement to obtain the fluidity of the core 21 to be tested obtained by detection on the logging equipment 18;

Preferably, the fluidity λ ₂ of the core 21 to be tested obtained by the logging equipment 18 is obtained by the following formula (2):

In formula (2), λ ₂ is the fluidity of the core 21 to be tested obtained by the logging equipment; C is the correlation coefficient of the probe currently used by the logging equipment 18; q is the suction liquid read out from the logging equipment. The volume of , the unit is cm ³ ; μ is the viscosity of the formation fluid, which is 1 under the experimental conditions;

S6, compare the fluidity of the core 21 to be measured in step S5 with the fluidity of the core 21 to be measured obtained in step S4;

S7. Adjust the logging equipment 18 according to the comparison result (eg difference) until the fluidity of the core 21 to be tested obtained by the logging equipment 18 is consistent with the fluidity of the core 21 to be tested obtained in step S4.

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

S7.1. Calculate and obtain the target probe correlation coefficient C _o according to the following formula (3):

In formula (3), λ ₁ is the fluidity of the core 21 to be tested obtained by calculation in step S4.3; C is the probe correlation coefficient described in step 5; λ ₂ is the test obtained by the logging equipment in step 5. Measure the fluidity of core 21;

S7.2. Adjust the probe correlation coefficient of the logging equipment to be the target probe correlation coefficient C _o ;

S7.3. Repeat steps S5-S6 once or more until λ ₂ =λ ₁ .

In order to improve the verification accuracy, steps S2-S7 may be repeated one or more times under the condition of gradually increasing or reducing the predetermined pressure, so as to improve the accuracy of the verification result.

The above description is only a specific embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related The technical field of the present invention is similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A method of logging device calibration, comprising the steps of:

s1, placing the core testing module with the core to be tested in a testing box body, and butting the core testing module on a liquid outlet of the testing box body;

s2, filling liquid into a liquid filling port of the test box body until the test box body is filled with the liquid;

s3, inflating and pressurizing the inflation inlet of the test box body to a preset pressure, driving liquid in the test box body to enter the core test module, penetrate through the core to be tested and seep out of the liquid outlet;

s4, collecting liquid seeped out from the liquid outlet, and calculating to obtain the fluidity of the core to be measured by combining the liquid seepage speed and the preset pressure;

s5, placing the logging equipment at a liquid discharge port of the test box, repeating the steps S2-S3, starting the logging equipment, and obtaining the fluidity of the core to be detected, which is obtained by the detection of the logging equipment;

s6, comparing the fluidity of the core to be tested obtained in the step S5 with the fluidity of the core to be tested obtained in the step S4;

and S7, adjusting the correlation coefficient of the logging equipment probe according to the comparison result until the mobility of the core to be detected, which is obtained by the detection of the logging equipment, is consistent with the mobility of the core to be detected, which is obtained in the step S4.

2. The logging apparatus verification method of claim 1, wherein step S4 comprises the steps of:

s4.1, collecting liquid seeped out from the liquid outlet;

s4.2, recording the seepage time and the seepage amount of the collected liquid;

s4.3, calculating according to the following formula (I) to obtain the fluidity lambda of the core to be measured ₁ ：

In the formula (I), lambda ₁ The fluidity of the core to be detected is obtained; p1 is the predetermined pressure in MPa in step S3; 0.001 is a water column pressure conversion coefficient; h is the vertical distance from the inflation inlet in the step S3 to one end, far away from the liquid discharge direction, of the core to be tested, and the unit is m; 0.101 is standard atmospheric pressure in MPa; t is the exudation time of the liquid in step S4.2, in units of S; s is the area of the cross section of the rock core to be measured and the unit is cm ² (ii) a V is the amount of liquid exuded in step S4.2, in cm ³ (ii) a And L is the length of the core to be measured and is in cm.

3. The logging device calibration method according to claim 2, wherein in step S1, one surface of the test box is provided with a curved surface corresponding to an inner surface of the oil well, and the core test module is positioned inside the test box on an inner side of the curved surface; the liquid discharge port is formed in the cambered surface;

and in the step S4.1, a drainage device is arranged outside the liquid outlet.

4. The method for verifying the logging equipment as claimed in claim 2, wherein in step S5, the logging equipment detects the obtained fluidity λ of the core to be tested ₂ Obtained by the following formula (II):

in the formula (II), λ ₂ Obtaining the fluidity of the core to be detected for the detection of logging equipment; c is the correlation coefficient of the probe used by the logging equipment at present; q is the volume of its pumped liquid read from the logging device in cm ³ (ii) a μ is the formation fluid viscosity, 1 under experimental conditions; Δ P is the pressure difference read from the logging tool as it draws fluid in MPa.

5. The logging tool verification method of claim 2, wherein in step S7, adjusting the logging tool comprises adjusting a probe correlation coefficient of the logging tool; step S7 includes the following steps:

s7.1, calculating and obtaining a target probe correlation coefficient C according to the following formula (III) _o ：

In the formula (III), λ ₁ Calculating the fluidity of the core to be measured obtained in the step S4.3; c is the probe correlation coefficient in the step 5; lambda [ alpha ] ₂ Detecting the obtained core fluidity to be detected by the logging equipment in the step 5;

s7.2, adjusting the probe correlation coefficient of the logging equipment to be a target probe correlation coefficient C _o ；

S7.3, repeating the steps S5-S6 for one or more times until lambda ₂ ＝λ ₁ 。

6. The logging apparatus verification method according to any one of claims 1 to 5, wherein in step S2, a liquid filling unit is connected to the liquid filling port of the test tank;

the liquid filling unit comprises a liquid filling pump, a first connecting pipeline connected between the liquid filling 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, liquid is pumped into the liquid injection port through the first connecting pipeline until the test box body is filled with the liquid.

7. A logging device verification method according to any of claims 1-5, wherein in step S3, a gas filling unit is connected to the gas filling port of the test box;

the inflation unit comprises a gas compressor, a second connecting pipeline connected between the gas compressor and the inflation inlet, a gas storage tank, a second pressure detection module and a pressure regulation module;

the gas storage tank is arranged on the second connecting pipeline and stores the pressurized gas generated by the gas compressor and conveys the pressurized gas into the test box body through the second connecting pipeline; and the pressurized gas is enabled to reach the preset pressure through the cooperation of the second pressure detection module and the pressure regulation module.

8. A logging device verification system, for use in a logging device verification method according to any of claims 1-5; the well logging equipment calibration system comprises a closed test box body, a core test module for placing a core to be tested, a liquid filling unit and an air filling unit;

the test box body is respectively provided with a liquid charging port, a gas charging port and a liquid discharging port; the core testing module is arranged in the testing box body and is relatively communicated with the liquid outlet;

the liquid filling unit is connected with the liquid filling port and is used for filling liquid into the test box body;

the inflation unit is connected with the inflation inlet and used for inflating and pressurizing the test box body, driving liquid in the test box body to enter the core test module, and permeating the core to be tested to seep out from the liquid outlet.

9. The logging device calibration system of claim 8 wherein a surface of the test housing is provided with a contour corresponding to an inner surface of the well; the liquid discharge port is arranged on the cambered surface.

10. The logging equipment calibration system as recited in claim 8, wherein the core testing module comprises a barrel for placing a core to be tested, at least one seal and at least one support;

the opposite two ends of the cylinder are open and are communicated with the test box body and the liquid outlet;

the supporting piece is arranged in one end of the cylinder body close to the liquid outlet and supports the core to be measured in the cylinder body;

the sealing element is arranged in the opposite other end of the cylinder body and seals a gap between the inner surface of the cylinder body and the core to be measured.

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