Signal calibration device for multi-depth logging instruments

Abstract

The present invention relates to the technical field of petroleum engineering equipment development, and is a multi-depth logging instrument signal calibration device, the former includes a brine solution mixing tank and a glass fiber reinforced plastic calibration experimental system, the glass fiber reinforced plastic calibration experimental system includes a tank body, a layered partition, an invasion zone partition and a lowering pipe, and an inner chamber, an outer chamber, an upper chamber and a lower chamber are formed in the tank body, and the latter performs instrument measurement accuracy evaluation and measurement signal value calibration by simulating the measurement response of the multi-depth resistivity logging instrument under a specific model. The present invention adopts non-magnetic and non-conductive glass fiber reinforced plastic material, realizes longitudinal and radial stratification, can simulate layered formations and mud invasion environments, provides a stable and diversified test environment for the development of new instruments, realizes precise manual control of experimental parameters, makes the experimental model more flexible, and makes the evaluation of experimental results more refined, and provides a strong guarantee for the development of a new generation of high-level multi-depth resistivity logging instruments.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum engineering equipment development, and is a multi-depth well logging instrument signal calibration device. Background Art

[0002] In recent years, with the development of the petroleum industry and the advancement of exploration and development technology, more and more advanced instruments have been put into use to solve oil and gas reservoir projects with high exploration and development difficulties and high technical requirements. Due to the characteristics of short drilling time, high logging accuracy and strong timeliness, logging while drilling tools have been widely used in complex process wells such as high-angle wells and horizontal wells. With the deepening of oil field development, in order to cope with the logging environment in complex structural areas, the redevelopment of old oil fields, thin oil layers and fault block formations, the upgrading and transformation of related logging equipment and the development of new instruments are very important and urgent. The development of new logging instruments has become the focus of attention in the industry. The detection performance, measurement accuracy and environmental factors of new logging instruments are the key parameters for evaluating the advantages and disadvantages and success or failure of a new tool. Therefore, it is very important to design a device for logging instrument signal detection and calibration.

[0003] The multi-depth logging instrument signal calibration device is a device for detecting and evaluating the measurement accuracy and resistivity calibration method of electrical logging instruments, providing technical parameters and measurement signal conversion assistance. It can be used for the calibration and calibration of conventional while-drilling electromagnetic wave resistivity logging instruments, azimuth edge logging tools, and induction logging tools. Compared with traditional salt barrel experiments and lake water experiments, this device can provide a more stable experimental environment, quantify experimental parameters and technical indicators, flexibly preset experimental models in advance according to the purpose of the experiment, and simulate logging responses in various situations such as wellbore environment, invasion environment, and formation electrical stratification. It can be used for instrument measurement accuracy evaluation, instrument detection characteristics inspection, instrument environmental impact law inspection, instrument calibration / calibration parameter measurement, environmental correction coefficient determination and other important parameter acquisition. Summary of the invention

[0004] The present invention provides a multi-depth logging instrument signal calibration device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of uncertainty and unchangeability of experimental parameters in existing traditional natural environment experimental fields.

[0005] The technical scheme of the present invention is realized by the following measures: a multi-depth logging instrument signal calibration device, including a brine solution mixing tank and a glass fiber reinforced plastic calibration experimental system, the glass fiber reinforced plastic calibration experimental system including a tank body, a layered partition, an invasion zone partition and a lowering pipe, the tank body is transversely provided with layered partitions that can divide the tank body into an upper region, a middle region and a lower region, and an annular invasion zone partition that can divide the middle region into an inner chamber and an outer chamber is longitudinally provided between the layered partitions, the cavity between the layered partitions in the upper region and the top wall of the tank body forms an upper chamber, the cavity between the layered partitions in the lower region and the bottom wall of the tank body forms a lower chamber, the top wall and the bottom wall of the tank body and the center of the layered partition are both provided with upper and lower corresponding center holes, and the center holes are embedded in the center holes. There is a lower pipe running through the entire tank body and reaching deep into the ground, a first water inlet on the upper part of the brine solution mixing tank is fixedly connected with a water inlet pipeline, a first water outlet at the bottom of the brine solution mixing tank is fixedly connected with a drainage pipeline, a first water inlet is arranged on the tank body at the upper left part of the upper cabin, an upper water supply pipeline is fixedly connected between the first water inlet and the second water outlet at the bottom of the brine solution mixing tank, a first water outlet is arranged on the tank body at the lower right part of the upper cabin, an upper circulating return water pipeline is fixedly connected between the first water outlet and the second water inlet on the upper part of the brine solution mixing tank, an open opening for adding solid salt particles is arranged on the top of the brine solution mixing tank, a liquid level gauge is arranged in the brine solution mixing tank, and overflow outlets are arranged on the upper sides of the outer walls of the inner cabin, the outer cabin, the upper cabin and the lower cabin.

[0006] The following are further optimizations and / or improvements to the above technical solutions:

[0007] The inner cabin, the upper cabin and the lower cabin are all columnar, the outer cabin is annular, and the inner cabin, the outer cabin, the upper cabin and the lower cabin are not connected to each other.

[0008] A second water inlet is arranged on the tank body at the upper left of the outer cabin, and a middle-layer water supply pipeline is fixedly connected between the second water inlet and the upper-layer water supply pipeline, a third water outlet is arranged on the tank body at the lower right of the outer cabin, and a middle-layer circulation return water pipeline is fixedly connected between the upper-layer circulation return water pipeline and the third water outlet, a third water inlet is arranged on the intrusion zone baffle at the upper left of the inner cabin, and an intrusion layer water supply pipeline is fixedly connected between the upper-layer water supply pipeline between the middle-layer water supply pipeline and the brine solution mixing tank and the third water inlet, and a fifth water outlet is arranged on the stratified baffle at the bottom of the inner cabin, An intrusion layer circulation return water pipeline is fixedly connected between the upper layer circulation return water pipeline between the middle layer circulation return water pipeline and the brine solution mixing tank and the fifth water outlet, a fourth water inlet is arranged on the tank body at the upper left part of the lower cabin, a lower layer water supply pipeline is fixedly connected between the upper layer water supply pipeline between the intrusion layer water supply pipeline and the brine solution mixing tank and the fourth water inlet, a seventh water outlet is arranged on the tank body at the lower right part of the lower cabin, and a lower layer circulation return water pipeline is fixedly connected between the upper layer circulation return water pipeline between the intrusion layer circulation return water pipeline and the brine solution mixing tank and the seventh water outlet.

[0009] A second water outlet is provided on the tank body below the above-mentioned first water outlet, and an upper-layer circulating return water parallel pipeline is connected between the second water outlet and the upper-layer circulating return water pipeline, a fourth water outlet is provided on the tank body below the third water outlet, a middle-layer circulating return water parallel pipeline is fixedly connected between the upper-layer circulating return water pipeline between the middle-layer circulating return water pipeline and the brine solution mixing tank and the fourth water outlet, a sixth water outlet is provided on the stratified partition on the left side of the fifth water outlet, an intrusion-layer circulating return water parallel pipeline is fixedly connected between the upper-layer circulating return water pipeline between the intrusion-layer circulating return water pipeline and the brine solution mixing tank and the sixth water outlet, an eighth water outlet is provided on the tank body below the seventh water outlet, and a lower-layer circulating return water parallel pipeline is fixedly connected between the upper-layer circulating return water pipeline between the lower-layer circulating return water pipeline and the brine solution mixing tank and the eighth water outlet.

[0010] The above also includes a water supply pump and a drainage pump. The water supply pump is fixedly installed on the upper water supply pipeline between the lower water supply pipeline and the brine solution mixing tank, and the drainage pump is fixedly installed on the upper circulating return water pipeline between the lower circulating return water parallel pipeline and the brine solution mixing tank.

[0011] Water valves are fixedly installed on the upper water supply pipeline between the middle water supply pipeline and the brine solution mixing tank, the middle water supply pipeline, the intrusion layer water supply pipeline, the lower water supply pipeline, the upper circulating return water pipeline between the upper circulating return water parallel pipeline and the brine solution mixing tank, the upper circulating return water parallel pipeline, the middle circulating return water pipeline, the middle circulating return water parallel pipeline, the intrusion layer circulating return water pipeline, the intrusion layer circulating return water parallel pipeline, the lower circulating return water pipeline, the lower circulating return water parallel pipeline, the water inlet pipeline, the drainage pipeline, and the upper circulating return water pipeline between the water supply pump and the brine solution mixing tank.

[0012] The above-mentioned tank body, layered partitions, intrusion zone partitions, and lower pipes are all made of non-magnetic, non-conductive fiberglass materials; the upper water supply pipeline, middle water supply pipeline, intrusion layer water supply pipeline, lower water supply pipeline, upper circulating return water pipeline, upper circulating return water parallel pipeline, middle circulating return water pipeline, middle circulating return water parallel pipeline, intrusion layer circulating return water pipeline, intrusion layer circulating return water parallel pipeline, lower circulating return water pipeline, lower circulating return water parallel pipeline and the water valves on each pipeline are all made of non-magnetic, non-conductive materials.

[0013] The bottom of the fiberglass scale experimental system is seated on a concrete base, and the concrete is embedded with fiberglass reinforced steel bars.

[0014] The present invention adopts non-magnetic and non-conductive fiberglass material to achieve longitudinal and radial stratification, which can simulate layered strata and mud intrusion environments, provide a stable and diversified testing environment for the development of new instruments, and realize precise manual control of experimental parameters, making the experimental model more flexible and the evaluation of experimental results more precise, providing a strong guarantee for the development of a new generation of high-level multi-depth resistivity logging instruments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a schematic diagram of the process structure of Example 1 of the present invention.

[0016] The codes in the accompanying drawings are: 1 is a brine solution mixing tank, 2 is a tank body, 3 is a layered partition, 4 is an intrusion zone partition, 5 is a lower pipe, 6 is an inner cabin, 7 is an outer cabin, 8 is an upper cabin, 9 is a lower cabin, 10 is a water supply pump, 11 is a water valve, 12 is a water inlet pipeline, 13 is a drainage pipeline, 14 is an upper layer water supply pipeline, 15 is an upper layer circulation return pipeline, 16 is a drainage pump, 17 is a middle layer water supply pipeline, 18 is a middle layer circulation return pipeline, 19 is an intrusion layer water supply pipeline, 20 is an intrusion layer circulation return pipeline, 21 is a lower layer water supply pipeline, 22 is a lower layer circulation return pipeline, 23 is an upper layer circulation return parallel pipeline, 24 is a middle layer circulation return parallel pipeline, 25 is an intrusion layer circulation return parallel pipeline, 26 is a lower layer circulation return parallel pipeline, and 27 is a concrete base. DETAILED DESCRIPTION

[0017] The present invention is not limited by the following embodiments, and the specific implementation method can be determined according to the technical solution of the present invention and the actual situation. In the invention, for the convenience of description, the relative position relationship of each component is described according to the attached specification. Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0018] The present invention will be further described below in conjunction with embodiments:

[0019] Embodiment 1: As attached Figure 1As shown, the multi-depth logging instrument signal calibration device includes a brine solution mixing tank 1 and a glass fiber reinforced plastic calibration experimental system. The glass fiber reinforced plastic calibration experimental system includes a tank body 2, a layered partition 3, an invasion zone partition 4 and a lowering pipe 5. The tank body 2 is laterally provided with a layered partition 3 that can divide the tank body 2 into an upper area, a middle area and a lower area. An annular invasion zone partition 4 that can divide the middle area into an inner chamber 6 and an outer chamber 7 is longitudinally provided between the layered partitions 3. The cavity between the layered partition 3 in the upper area and the top wall of the tank body 2 forms an upper chamber 8. The cavity between the layered partition 3 in the lower area and the bottom wall of the tank body 2 forms a lower chamber 9. The top wall and the bottom wall of the tank body 2 and the center of the layered partition 3 are both provided with upper and lower corresponding center holes. The center hole is embedded with a material that penetrates the entire tank body 2 and can penetrate deeply into the tank body 2. A lower pipe 5 is provided 5m to 10m below the upper part of the brine solution mixing tank 1, a first water inlet is fixedly connected to a water inlet pipeline 12, a first water outlet at the bottom of the brine solution mixing tank 1 is fixedly connected to a drainage pipeline 13, a first water inlet is provided on the tank body 2 at the upper left part of the upper cabin 8, an upper water supply pipeline 14 is fixedly connected between the first water inlet and the second water outlet at the bottom of the brine solution mixing tank 1, a first water outlet is provided on the tank body 2 at the lower right part of the upper cabin 8, an upper circulating water return pipeline 15 is fixedly connected between the first water outlet and the second water inlet at the upper part of the brine solution mixing tank 1, an opening for adding solid salt particles is provided on the top of the brine solution mixing tank 1, a liquid level gauge is provided in the brine solution mixing tank 1, and overflow outlets are provided on the upper sides of the outer walls of the inner cabin 6, the outer cabin 7, the upper cabin 8 and the lower cabin 9.

[0020] The present invention adopts non-magnetic and non-conductive fiberglass material, and forms a multi-depth resistivity logging tool experimental device through a salt water solution mixing tank 1 and a fiberglass scale experimental system. The experimental main body of the present invention adopts a cabin-divided main tank structure to achieve longitudinal and radial stratification, and can simulate layered formations and mud intrusion environments, providing a stable and diversified testing environment for the development of new instruments. Through quantitative control of the concentration of the mixing tank solution, precise manual control of experimental parameters can be achieved, avoiding the uncertainty and unchangeability of experimental parameters in traditional natural environment experimental fields, making the experimental model more flexible and the evaluation of experimental results more refined, providing a strong guarantee for the development of a new generation of high-level multi-depth resistivity logging instruments.

[0021] In the present invention, an opening for adding solid salt particles is provided, so that the salt solution of a specified concentration can be precisely prepared.

[0022] In actual operation, the brine solution mixing tank 1 can be made of glass fiber reinforced plastic, the tank body 2 can be 4m in diameter, 4m in height, and have a volume of about 48m 3 , and can also be equipped with a water depth measurement calibration ruler, through which the volume of residual water in the tank 2 can be accurately calculated;

[0023] The tank 2 in the FRP calibration test system can be designed according to the following requirements: 4m in diameter and 9m in height, placed on a FRP concrete horizontal load-bearing platform, the tank 2 is evenly divided into three sections by a layered partition 3, each section is 3m long, and a 1.2m diameter annular intrusion zone partition 4 is built into the middle section to divide the middle layer into two parts; the thickness of the layered partition 3 and the annular intrusion zone partition 4 is 10mm;

[0024] The lowering pipe 5 runs through the entire tank body 2 and can penetrate 5.5m underground, which can be applicable to the experimental requirements of logging instruments of different lengths. The inner diameter (diameter) of the lowering pipe 5 is 250mm, which is applicable to the size of mainstream logging instruments on the market. The pipe is filled with air, fresh water, and NaCl solution respectively to simulate the wellbore environment under different conditions.

[0025] Embodiment 2: As attached Figure 1 As shown, as an optimization of the above embodiment, the inner cabin 6, the upper cabin 8 and the lower cabin 9 are all columnar, the outer cabin 7 is annular, and the inner cabin 6, the outer cabin 7, the upper cabin 8 and the lower cabin 9 are not connected to each other.

[0026] Embodiment 3: As attached Figure 1 As shown, a second water inlet is provided on the tank body 2 at the upper left of the outer cabin 7, and a middle-layer water supply pipeline 17 is fixedly connected between the second water inlet and the upper water supply pipeline 14, a third water outlet is provided on the tank body 2 at the lower right of the outer cabin 7, a middle-layer circulation return water pipeline 18 is fixedly connected between the upper circulation return water pipeline 15 and the third water outlet, a third water inlet is provided on the intrusion zone partition 4 at the upper left of the inner cabin 6, an intrusion layer water supply pipeline 19 is fixedly connected between the upper water supply pipeline 14 and the third water inlet between the middle-layer water supply pipeline 17 and the salt solution mixing tank 1, a fifth water outlet is provided on the stratified partition 3 at the bottom of the inner cabin 6, and a middle-layer circulation return water pipeline 18 is fixedly connected between the upper circulation return water pipeline 15 and the third water outlet, a third water inlet is provided on the intrusion zone partition 4 at the upper left of the inner cabin 6, and an intrusion layer water supply pipeline 19 is fixedly connected between the upper water supply pipeline 14 and the third water inlet between the middle-layer water supply pipeline 17 and the salt solution mixing tank 1, and a fifth water outlet is provided on the stratified partition 3 at the bottom of the inner cabin 6. An intrusion layer circulation return water pipeline 20 is fixedly connected between the upper layer circulation return water pipeline 15 and the fifth water outlet between the intrusion layer circulation return water pipeline 18 and the brine solution mixing tank 1, a fourth water inlet is arranged on the tank body 2 at the upper left part of the lower cabin 9, a lower layer circulation return water pipeline 21 is fixedly connected between the upper layer water supply pipeline 14 and the fourth water inlet between the intrusion layer circulation return water pipeline 19 and the brine solution mixing tank 1, a seventh water outlet is arranged on the tank body 2 at the lower right part of the lower cabin 9, and a lower layer circulation return water pipeline 22 is fixedly connected between the upper layer circulation return water pipeline 15 and the seventh water outlet between the intrusion layer circulation return water pipeline 20 and the brine solution mixing tank 1.

[0027] Embodiment 4: As attached Figure 1As shown, a second water outlet is provided on the tank body 2 below the first water outlet, an upper-layer circulating return water parallel pipeline 23 is connected between the second water outlet and the upper-layer circulating return water pipeline 15, a fourth water outlet is provided on the tank body 2 below the third water outlet, a middle-layer circulating return water parallel pipeline 24 is fixedly connected between the upper-layer circulating return water pipeline 15 between the middle-layer circulating return water pipeline 18 and the brine solution mixing tank 1 and the fourth water outlet, a sixth water outlet is provided on the layered partition 3 on the left side of the fifth water outlet, an intrusion-layer circulating return water parallel pipeline 25 is fixedly connected between the upper-layer circulating return water pipeline 15 between the intrusion-layer circulating return water pipeline 20 and the brine solution mixing tank 1 and the sixth water outlet, an eighth water outlet is provided on the tank body 2 below the seventh water outlet, a lower-layer circulating return water parallel pipeline 26 is fixedly connected between the upper-layer circulating return water pipeline 15 between the lower-layer circulating return water pipeline 22 and the brine solution mixing tank 1 and the eighth water outlet.

[0028] Embodiment 5: As attached Figure 1 As shown, it also includes a water supply pump 10 and a drainage pump 16. The water supply pump 10 is fixedly installed on the upper water supply pipeline 14 between the lower water supply pipeline 21 and the brine solution preparation tank 1, and the drainage pump 16 is fixedly installed on the upper circulation return water pipeline 15 between the lower circulation return water parallel pipeline 26 and the brine solution preparation tank 1.

[0029] As needed, the water supply pump 10 pumps the water in the brine solution mixing tank 1 into the FRP calibration experiment system through water pipes and valve control, and the drainage pump 16 pumps the water in the FRP calibration experiment system into the mixing tank. The supply and drainage pumps 16 work together to realize the water circulation in the mixing tank and each compartment in the calibration experiment system.

[0030] Embodiment 6: As attached Figure 1 As shown, the water valve 11 is fixedly installed on the upper water supply pipeline 14 between the middle water supply pipeline 17 and the brine solution mixing tank 1, the middle water supply pipeline 17, the intrusion layer water supply pipeline 19, the lower water supply pipeline 21, the upper circulating return water pipeline 15 between the upper circulating return water parallel pipeline 23 and the brine solution mixing tank 1, the upper circulating return water parallel pipeline 23, the middle circulating return water pipeline 18, the middle circulating return water parallel pipeline 24, the intrusion layer circulating return water pipeline 20, the intrusion layer circulating return water parallel pipeline 25, the lower circulating return water pipeline 22, the lower circulating return water parallel pipeline 26, the water inlet pipeline 12, the drainage pipeline 13, and the upper circulating return water pipeline 15 between the water supply pump 10 and the brine solution mixing tank 1.

[0031] In the present invention, the inlet and outlet water pipes of each cabin of the fiberglass scale experimental system are made of non-magnetic and non-conductive materials, and independent valves are installed on the pipelines. During the experiment, the valves are ensured to be completely closed to prevent liquid loss in the cabin during the experiment.

[0032] Embodiment 7: As attached Figure 1As shown, the tank body 2, the layered partition 3, the intrusion zone partition 4, and the lower pipe 5 are all made of non-magnetic and non-conductive fiberglass, and the upper water supply pipeline 14, the middle water supply pipeline 17, the intrusion layer water supply pipeline 19, the lower water supply pipeline 21, the upper circulating return water pipeline 15, the upper circulating return water parallel pipeline 23, the middle circulating return water pipeline 18, the middle circulating return water parallel pipeline 24, the intrusion layer circulating return water pipeline 20, the intrusion layer circulating return water parallel pipeline 25, the lower circulating return water pipeline 22, the lower circulating return water parallel pipeline 26 and the water valves 11 on each pipeline are all made of non-magnetic and non-conductive materials.

[0033] As needed, the brine solution preparation tank 1 is connected to the fluid in the FRP calibration experimental system through a non-magnetic and non-conductive material pipeline, and the fluid exchange is achieved through a pump. Each tank body 2 compartment is provided with a separate pipeline for entering and exiting the water tank and is installed with an inlet and outlet water valve 11. The water valve 11 is switched to select water injection or drainage for each compartment. The water supply pump 10, the drainage pump 16 and the water valve 11 are opened and closed in cooperation, thereby realizing the exchange and recycling of the brine solution in the tank body 2.

[0034] Embodiment 8: As attached Figure 1 As shown, the bottom of the glass fiber reinforced plastic scale experimental system is seated on a concrete base 27, and glass fiber reinforced plastics are embedded in the concrete.

[0035] Embodiment 9: As attached Figure 1As shown, the method for using the multi-depth logging instrument signal calibration device is carried out according to the following method: the first step is to prepare a required amount and concentration of NaCl solution in the salt solution preparation tank 1, and pump the prepared NaCl solution into the lower chamber 9 of the glass fiber reinforced plastic calibration experimental system; the second step is to take a sample at the overflow port of the lower chamber 9 to measure the resistivity of the fluid in the lower chamber 9; the third step is to prepare a required amount and concentration of NaCl solution in the salt solution preparation tank 1, and pump the prepared NaCl solution into the outer chamber 9 of the glass fiber reinforced plastic calibration experimental system. The fourth step is to take a sample at the overflow port of the outer chamber 7 and measure the resistivity of the fluid in the outer chamber 7; the fifth step is to prepare a required amount and concentration of NaCl solution in the salt water solution preparation tank 1, and pump the prepared NaCl solution into the inner chamber 6 of the FRP calibration test system; the sixth step is to take a sample at the overflow port of the inner chamber 6 and measure the resistivity of the fluid in the inner chamber 6; the seventh step is to prepare a required amount and concentration of NaCl solution in the salt water solution preparation tank 1, and pump the prepared NaCl solution into the inner chamber 6 of the FRP calibration test system. In the upper cabin 8; the eighth step, sampling is performed at the overflow port of the upper cabin 8, and the resistivity of the fluid in the upper cabin 8 is measured to complete the establishment of the experimental model; the ninth step, the multi-depth electromagnetic wave resistivity instrument is placed in the lowering pipe 5 in the center of the tank body 2 until the multi-depth electromagnetic wave resistivity instrument is completely located below the experimental calibration tank body 2; the tenth step, the multi-depth electromagnetic wave resistivity instrument is started, and the multi-depth electromagnetic wave resistivity instrument is slowly lifted up at a speed of 0.1m / s, and the measurement signal is recorded every 1s; the eleventh step, after the multi-depth electromagnetic wave resistivity instrument is completed When it is fully lifted to the top of the calibration experiment system, stop measuring, withdraw the multi-depth electromagnetic wave resistivity instrument and download the logging signals recorded during the measurement process; Step 12, draw a graph based on the logging signals and compare it with the simulated signals under the same model conditions to verify the measurement accuracy; Step 13, use the drainage pump 16 to drain the NaCl solution in the lower and upper chambers 9, outer chamber 7, inner chamber 6 and upper chamber 8 of the fiberglass calibration experiment system in turn, return it to the brine solution preparation tank 1 and then discharge it into the sewage treatment system, use clean water to brush the tank body 2, and complete a calibration experiment.

[0036] Embodiment 10: As attached Figure 1 As shown, as an optimization of the above embodiment, during use, the concentration of the NaCl solution prepared in the upper chamber 8 and the lower chamber 9 is 5% to 9%, the concentration of the NaCl solution in the inner chamber 6 is 10% to 20%, the concentration of the NaCl solution in the outer chamber 7 is 0% to 2%, and there must be no magnetic and conductive objects within a 10m radius of the fiberglass scale experimental system.

[0037] In the present invention, the upper and lower compartments can be filled with NaCl solutions (3%) of the same concentration as needed to simulate a symmetrical formation electrical model, the internal compartment of the middle layer can be filled with a high-concentration NaCl solution (15%), and the external compartment can be filled with fresh water (tap water) to simulate a formation resistivity model under low-resistance mud intrusion.

[0038] Embodiment 11: As attached Figure 1 As shown, the method for using the multi-depth logging instrument signal calibration device is carried out according to the following method: the first step is to prepare 150m of brine solution in the brine solution preparation tank 1. 3 The concentration of NaCl solution is 9.6%, and the prepared NaCl solution is pumped into the lower chamber 9 of the FRP calibration experimental system; the second step is to take a sample at the overflow port of the lower chamber 9 and measure the resistivity of the fluid in the lower chamber 9; the third step is to prepare 146m3 of brine solution in the salt solution preparation tank 1. 3 The concentration of NaCl solution is 1.6%, and the prepared NaCl solution is pumped into the outer chamber 7 of the FRP calibration test system; the fourth step is to take a sample at the overflow port of the outer chamber 7 and measure the resistivity of the fluid in the outer chamber 7; the fifth step is to prepare 5m3 of brine in the salt solution preparation tank 1. 3 The concentration of NaCl solution is 12.3%, and the prepared NaCl solution is pumped into the inner chamber 6 of the FRP calibration experimental system; the sixth step is to take a sample at the overflow port of the inner chamber 6 and measure the resistivity of the fluid in the inner chamber 6; the seventh step is to prepare 150m3 of brine solution in the salt solution preparation tank 1 3 The concentration of NaCl solution is 9.6%, and the prepared NaCl solution is pumped into the upper chamber 8 of the FRP calibration experimental system; the eighth step is to take samples at the overflow port of the upper chamber 8, measure the resistivity of the fluid in the upper chamber 8, and complete the establishment of the experimental model; the ninth step is to put the multi-depth electromagnetic wave resistivity instrument into the lower pipe 5 in the center of the tank 2, until the multi-depth electromagnetic wave resistivity instrument is completely located under the experimental calibration tank 2; the tenth step is to start the multi-depth electromagnetic wave resistivity instrument, and slowly lift the multi-depth electromagnetic wave resistivity instrument at a speed of 0.1m / s, and record the measurement signal every 1s. ; Step 11, when the multi-depth electromagnetic wave resistivity instrument is fully lifted to the top of the calibration experiment system, stop measuring, withdraw the multi-depth electromagnetic wave resistivity instrument and download the logging signals recorded during the measurement process; Step 12, draw a graph based on the logging signals and compare it with the simulated signals under the same model conditions to verify the measurement accuracy; Step 13, use the drainage pump 16 to drain the NaCl solution in the lower and upper cabins 9, outer cabin 7, inner cabin 6 and upper cabin 8 of the fiberglass calibration experiment system in turn, return it to the brine solution preparation tank 1 and then discharge it into the sewage treatment system, use clean water to wash the tank body 2, and complete a calibration experiment.

[0039] The experimental modeling process of Example 9 of the present invention is summarized as follows: the modeling is carried out under the conditions of the resistivity of the intrusion zone, the resistivity of the original formation, the formation stratification and the resistivity of the surrounding rock. The model is close to the actual logging situation, and the coupling influence of multiple factors is comprehensively considered. The multi-angle and full-parameter precision test of the electromagnetic wave resistivity instrument while drilling is better than the precision test under single environmental variables such as air experiment and lake water experiment. At the same time, the ratio of the corresponding curves of the measured response and the simulated response can be used as the instrument precision calibration coefficient. By changing the concentration of the NaCl solution in each compartment, the formation resistivity is changed, and the formation model is accurately and flexibly tested. Therefore, the experimental system can simulate a variety of logging environments, and can consider the influence of stratification, invasion, borehole, surrounding rock, etc. It is an important measurement transposition for the development of new tools and has very important application value.

[0040] In summary, the present invention adopts non-magnetic and non-conductive fiberglass material to achieve longitudinal and radial stratification, which can simulate layered strata and mud intrusion environments, provide a stable and diversified testing environment for the development of new instruments, and realize precise manual control of experimental parameters, making the experimental model more flexible and the evaluation of experimental results more precise, providing a strong guarantee for the development of a new generation of high-level multi-depth resistivity logging instruments.

[0041] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A multi-depth logging instrument signal calibration device, characterized in that It includes a salt water solution mixing tank and a glass fiber reinforced plastic calibration experimental system. The glass fiber reinforced plastic calibration experimental system includes a tank body, a layered partition, an intrusion zone partition and a lowering pipe. The tank body is laterally provided with layered partitions that can divide the tank body into an upper region, a middle region and a lower region. An annular intrusion zone partition that can divide the middle region into an inner chamber and an outer chamber is longitudinally provided between the layered partitions. The cavity between the layered partitions in the upper region and the top wall of the tank body forms a lower chamber. The center of the top wall and the bottom wall of the tank body and the center of the layered partition are provided with upper and lower corresponding center holes. The center hole is embedded with a lowering pipe that runs through the entire tank body and can penetrate deep into the ground. The first water inlet at the top of the salt water solution mixing tank is fixedly connected to the water inlet. There is a water inlet pipeline, the first water outlet at the bottom of the brine solution mixing tank is fixedly connected with a drainage pipeline, a first water inlet is arranged on the tank body at the upper left part of the upper cabin, an upper water supply pipeline is fixedly connected between the first water inlet and the second water outlet at the bottom of the brine solution mixing tank, a first water outlet is arranged on the tank body at the lower right part of the upper cabin, an upper circulating water return pipeline is fixedly connected between the first water outlet and the second water inlet at the upper part of the brine solution mixing tank, an opening for adding solid salt particles is arranged on the top of the brine solution mixing tank, a liquid level gauge is arranged in the brine solution mixing tank, overflow ports are arranged on the upper sides of the outer walls of the inner cabin, the outer cabin, the upper cabin and the lower cabin, a second water inlet is arranged on the tank body at the upper left part of the outer cabin, and a fixed connection is formed between the second water inlet and the upper water supply pipeline. A middle-layer water supply pipeline is fixedly connected, a third water outlet is arranged on the tank body at the lower right part of the outer cabin, a middle-layer circulation return water pipeline is fixedly connected between the upper-layer circulation return water pipeline and the third water outlet, a third water inlet is arranged on the intrusion zone partition at the upper left part of the inner cabin, an intrusion layer water supply pipeline is fixedly connected between the upper-layer water supply pipeline between the middle-layer water supply pipeline and the brine solution mixing tank and the third water inlet, a fifth water outlet is arranged on the stratified partition at the bottom of the inner cabin, an intrusion layer circulation return water pipeline is fixedly connected between the upper-layer circulation return water pipeline between the middle-layer circulation return water pipeline and the brine solution mixing tank and the fifth water outlet, a fourth water inlet is arranged on the tank body at the upper left part of the lower cabin, and the upper-layer water supply pipeline between the intrusion layer water supply pipeline and the brine solution mixing tank is fixedly connected to the intrusion layer circulation return water pipeline. A lower-layer water supply pipeline is fixedly connected between the line and the fourth water inlet, a seventh water outlet is arranged on the tank body at the lower right part of the lower cabin, a lower-layer circulation return water pipeline is fixedly connected between the upper-layer circulation return water pipeline between the intrusion layer and the brine solution mixing tank and the seventh water outlet, a second water outlet is arranged on the tank body below the first water outlet of the upper cabin, an upper-layer circulation return water parallel pipeline is connected between the second water outlet and the upper-layer circulation return water pipeline, a fourth water outlet is arranged on the tank body below the third water outlet, a middle-layer circulation return water parallel pipeline is fixedly connected between the upper-layer circulation return water pipeline between the middle-layer circulation return water pipeline and the brine solution mixing tank and the fourth water outlet, a sixth water outlet is arranged on the stratified partition on the left side of the fifth water outlet,The upper layer circulation return water pipeline between the invasion layer circulation return water pipeline and the brine solution mixing tank and the sixth water outlet are fixedly connected with the invasion layer circulation return water parallel pipeline, the eighth water outlet is arranged on the tank body below the seventh water outlet, the upper layer circulation return water pipeline between the lower layer circulation return water pipeline and the brine solution mixing tank and the eighth water outlet are fixedly connected with the lower layer circulation return water parallel pipeline, and also include a water supply pump and a drainage pump, the upper layer water supply pipeline between the lower layer circulation return water pipeline and the brine solution mixing tank is fixedly installed with a water supply pump, and the lower layer circulation return water parallel pipeline A drainage pump is fixedly installed on the upper circulation return water pipeline between the brine solution mixing tank. The tank body, layered partitions, intrusion zone partitions, and lower pipes are all made of non-magnetic and non-conductive fiberglass. The upper water supply pipeline, middle water supply pipeline, intrusion layer water supply pipeline, lower water supply pipeline, upper circulation return water pipeline, upper circulation return water parallel pipeline, middle circulation return water pipeline, middle circulation return water parallel pipeline, intrusion layer circulation return water pipeline, intrusion layer circulation return water parallel pipeline, lower circulation return water pipeline, and lower circulation return water parallel pipeline are all made of non-magnetic and non-conductive materials.

2. The multi-depth logging instrument signal calibration device according to claim 1, characterized in that The inner cabin, the upper cabin and the lower cabin are all columnar, the outer cabin is annular, and the inner cabin, the outer cabin, the upper cabin and the lower cabin are not connected to each other.

3. The multi-depth logging instrument signal calibration device according to claim 1 or 2, characterized in that Water valves are fixedly installed on the upper water supply pipeline between the middle water supply pipeline and the brine solution mixing tank, the middle water supply pipeline, the intrusion layer water supply pipeline, the lower water supply pipeline, the upper circulating return water pipeline between the upper circulating return water parallel pipeline and the brine solution mixing tank, the upper circulating return water parallel pipeline, the middle circulating return water pipeline, the middle circulating return water parallel pipeline, the intrusion layer circulating return water pipeline, the intrusion layer circulating return water parallel pipeline, the lower circulating return water pipeline, the lower circulating return water parallel pipeline, the water inlet pipeline, the drainage pipeline, and the upper circulating return water pipeline between the water supply pump and the brine solution mixing tank, and the water valves on each pipeline are made of non-magnetic and non-conductive materials.

4. The multi-depth logging instrument signal calibration device according to claim 3, characterized in that The bottom of the FRP scale test system is placed on a concrete base with FRP steel bars embedded in the concrete.

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