Integrated testing system for liquid production profile of oil production horizontal well and underground television

Abstract

The invention relates to the technical field of oil and gas well oil testing and production testing, in particular to an oil-producing horizontal well fluid production profile and underground television integrated testing system which comprises the following steps that firstly, sand, scraps and crude oil in a shaft are cleaned, clear water is injected into the shaft, and then the well is closed; 2, testing pipe columns are installed together, wherein each testing pipe column comprises a multi-core cable, a coiled tubing, an array probe output profile logging instrument, a centralizer, a check valve, a light source and an underground television terminal, and the coiled tubing, the array probe output profile logging instrument, the centralizer, the check valve, the light source and the underground television terminal are sequentially connected together from top to bottom. The testing tubular column can complete two kinds of testing work after entering a well once, the precision of an interpretation result is improved, and the problems that the construction period is long and the cost is high when oil-producing horizontal well liquid production profile monitoring and underground television terminal hole monitoring are conducted after fracturing are conducted respectively are solved; according to the opening condition of each perforation cluster and fluid production profile data monitored by the underground television terminal, the reservoir and fracturing effect is comprehensively analyzed, and a basis is provided for reservoir and fracturing effect evaluation and fracturing scheme optimization.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas well oil testing and production testing, and is an integrated testing system for a production liquid profile of an oil-producing horizontal well and downhole television. Background Art

[0002] my country's low-permeability oil and gas resources are widely distributed, with a high proportion of reserves and huge development potential. Targeted fracturing reservoir transformation of low-permeability oil and gas fields has been widely proven to be an effective development method by many low-permeability, tight, and shale oil and gas projects at home and abroad. However, due to the strong heterogeneity of the reservoir, the production capacity after staged fracturing transformation varies greatly. It is urgent to understand the production capacity and fracturing effect of each stage and cluster, so as to provide an important basis for fine classification of reservoirs, optimization of fracturing transformation plans, and repeated fracturing layer selection.

[0003] The journal article titled "Analysis of Uniform Fracturing Degree of Multiple Clusters of Fractures Based on Perforation Imaging Monitoring" disclosed that: through the use of cable continuous tubing transportation, the degree of perforation abrasion is monitored using perforation imaging, and then the uniformity of fracturing of each cluster of fractures and the entry of proppant are analyzed, providing an important basis for optimizing the pumping program, reducing blasthole erosion, and improving the success rate of temporary plugging.

[0004] The patent document with announcement number CN105937393B, entitled A horizontal well drag-type fluid production profile test string and its testing method, discloses: a cable is dragged in the oil pipe to drive the production profile tester to measure the fluid production and water content of different combination layers respectively, the cable transmits data in real time, and the fluid production and water content of each test layer are analyzed in real time, so as to timely understand the fluid production information of each production layer of the horizontal well.

[0005] Downhole TV blasthole monitoring and production profile monitoring of horizontal wells are two testing methods that can evaluate reservoirs and fracturing effects from different angles. The test and evaluation advantages are different. Among them, for oil-water production profile monitoring, array multi-probe testing has obvious advantages over distributed optical fiber monitoring technology. At present, the two testing processes of downhole TV and production profile are tested separately, and the complementary advantages of the two technologies have not been achieved. There is an urgent need for an integrated testing system for the production profile of oil-producing horizontal wells and downhole TV to achieve accurate evaluation of reservoirs and fracturing effects and shorten the total testing cycle and cost of downhole TV terminals and production profile monitoring. Summary of the invention

[0006] The present invention provides an integrated testing system for the production fluid profile of oil-producing horizontal wells and downhole television, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problems of long construction period and high cost in the existing monitoring of the production fluid profile of oil-producing horizontal wells and downhole television blasthole monitoring after fracturing.

[0007] The technical solution of the present invention is achieved by the following measures: A system for testing the production profile of a horizontal oil-producing well and downhole television integration, comprising the following steps: Step 1: clean the sand, debris and crude oil in the wellbore, inject clean water into the wellbore, and then shut in the well; Step 2: Install the test string together, the test string includes a multi-core cable and a coiled tubing, an array probe production profile logging instrument, a centralizer, a check valve, a light source and a downhole TV terminal connected together from top to bottom, a plurality of well washing nozzles are arranged at intervals outside the check valve, and the multi-core cable passes through the coiled tubing and is respectively connected to the production fluid profile tester, the light source and the downhole TV terminal; Step 3, lowering the test string into the well; Step 4: After the test string is lowered to the set position above the perforation cluster at the heel end of the horizontal well, the lowering speed is reduced. During the lowering, the downhole TV terminal is used to monitor the changes in the perforation holes of each perforation cluster after fracturing until the lower end of the test string moves to the toe end of the horizontal well; Step 5: Start production. After the production and oil and water content are stable, the surface equipment is connected to the array probe production profile logging instrument through a multi-core cable. When the coiled tubing is pulled up at a uniform speed, the array probe production profile logging instrument is used to collect production fluid profile data until the lower end of the test string moves to the heel of the horizontal well. Step 6: After receiving qualified production profile data, disconnect the surface equipment from the multi-core cable and remove the test string; Step seven: Analyze the abrasion of each perforation cluster according to the monitoring information of the downhole TV terminal, evaluate the crack initiation law of each perforation cluster and the uniformity of opening of each perforation cluster under different fracturing pumping parameters; obtain the interpretation results of the liquid production profile according to the production profile data collected by the array probe production profile logging instrument and the opening status of each perforation cluster monitored by the downhole TV terminal.

[0008] The following are further optimizations and / or improvements to the above technical solutions: The array probe production profile logging instrument may be provided with a turbine revolution probe, a density probe, a water holding probe, a pressure probe and a temperature probe.

[0009] The above step five is to start production, and after the production and oil and water are stable, the ground equipment is connected to the array probe production profile logging instrument through a multi-core cable, and the coiled tubing is pulled up at a uniform speed to monitor and judge in real time whether the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe are working normally. After the horizontal section test is completed, the coiled tubing is lowered to the toe of the horizontal well again, and the pulling speed is determined according to the working conditions of each probe last time, and the coiled tubing is pulled up at a uniform speed to judge the working conditions of the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe in real time and collect production liquid profile data, and the production liquid profile data includes turbine speed, fluid density, water holding rate, pressure and temperature.

[0010] The multi-core cable in the above step 2 is a seven-core cable, three of which are connected to the production profile tester, and two of which are connected to the light source and the downhole TV terminal. After the multi-core cable is connected to the production profile tester, the light source and the downhole TV terminal, the following steps are performed: The first step is to conduct power-on tests on the production fluid profile tester, light source and downhole TV terminal to verify whether the performance of the production fluid profile tester, light source and downhole TV terminal is intact; If yes, proceed to step 2; If not, the production fluid profile tester, light source and downhole TV terminal are inspected and repaired respectively until the production fluid profile tester, light source and downhole TV terminal are powered on and tested to be in good condition, and then the second step is entered; The second step is to pump clean water into the coiled tubing to verify whether the well-washing nozzle is working properly; If the well-washing nozzle works normally, proceed to step 3; If the well-washing nozzle does not work properly, check and repair the well-washing nozzle until it works properly, and then proceed to step three.

[0011] The above step three is to lower the test string into the well. When the test string is 150 to 250 meters into the well, the surface equipment is connected to the light source and the downhole TV terminal through a multi-core cable, and the test string is continued to be lowered to observe whether the casing coupling is clear. If it is not clear, take out the test pipe column and replace the light source, and repeat the above process until the casing coupling is clearly observed; If it is clear, continue to lower the test string to above the perforation cluster at the heel of the horizontal well.

[0012] The fourth step is to lower the lowering speed after the test string is lowered to 15 to 25 meters above the perforation cluster at the heel end of the horizontal well, and monitor the changes in the perforation holes of each perforation cluster after fracturing through the downhole TV terminal until the lower end of the test string moves to the toe end of the horizontal well. After the monitoring is completed, the ground equipment is disconnected from the multi-core cable.

[0013] In the above step 4, if the casing in front of the downhole TV terminal is blurred, clean water is pumped into the coiled tubing, and the well washing nozzle sprays high-pressure water to clean the area in front of the downhole TV terminal.

[0014] The test string of the present invention can complete two testing tasks in one trip into the well, so that the two testing tasks complement each other, improve the accuracy of the interpretation results, and solve the problem of long construction period and high cost of separately monitoring the production profile of oil-producing horizontal wells and monitoring the boreholes of the downhole TV terminal after fracturing. According to the opening status of each perforation cluster and the production profile data monitored by the downhole TV terminal, the reservoir and fracturing effect are comprehensively analyzed, providing a basis for reservoir and fracturing effect evaluation and fracturing scheme optimization, achieving accurate evaluation of the reservoir and fracturing effect, and shortening the total test period and cost of the downhole TV terminal and production profile monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of the first embodiment.

[0016] The codes in the attached drawings are: 1 is a multi-core cable, 2 is a continuous oil pipe, 3 is an array probe production profile logging instrument, 4 is a centralizer, 5 is a check valve, 6 is a well washing nozzle, 7 is a light source, and 8 is a downhole TV terminal. DETAILED DESCRIPTION

[0017] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0018] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0019] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1 As shown, the integrated testing system for the production profile of oil-producing horizontal wells and downhole television includes the following steps: Step 1: clean the sand, debris and crude oil in the wellbore, inject clean water into the wellbore, and then shut in the well; Step 2: Install the test string together, the test string includes a multi-core cable 1 and a coiled tubing 2, an array probe production profile logging instrument 3, a centralizer 4, a check valve 5, a light source 7 and a downhole TV terminal 8 connected together from top to bottom. A plurality of well washing nozzles 6 are arranged at intervals outside the check valve 5. The multi-core cable 1 passes through the coiled tubing 2 and is respectively connected to the production fluid profile tester, the light source 7 and the downhole TV terminal 8; Step 3, lowering the test string into the well; Step 4: After the test string is lowered to the set position above the perforation cluster at the heel end of the horizontal well, the lowering speed is reduced. During the lowering, the downhole TV terminal is used to monitor the changes in the perforation holes of each perforation cluster after fracturing until the lower end of the test string moves to the toe end of the horizontal well; Step 5: Start production. After the production and oil and water content are stable, the surface equipment is connected to the array probe production profile logging instrument 3 through the multi-core cable 1. When the coiled tubing 2 is lifted at a uniform speed, the array probe production profile logging instrument 3 is used to collect production fluid profile data until the lower end of the test string moves to the bottom end of the horizontal well. Step 6: After receiving qualified production profile data, disconnect the surface equipment from the multi-core cable 1 and remove the test string; Step seven, based on the monitoring information of the downhole TV terminal 8, analyze the abrasion of the holes of each perforation cluster, evaluate the crack initiation law of each perforation cluster and the uniformity of the opening of each perforation cluster under different fracturing pumping parameters; based on the production profile data collected by the array probe production profile logging instrument 3, combined with the opening of each perforation cluster monitored by the downhole TV terminal 8, obtain the production profile interpretation result.

[0020] According to the requirements, the light source 7 is an existing well-known LED light source, and the downhole TV terminal 8 is an existing well-known downhole imaging device. In this way, the test string can complete two test tasks in one trip into the well, so that the two test tasks complement each other, improve the accuracy of the interpretation results, and solve the long construction period and high cost of separately monitoring the production profile of oil-producing horizontal wells and monitoring the holes of the downhole TV terminal 8 after fracturing. According to the opening status of each perforation cluster and the production profile data monitored by the downhole TV terminal 8, the reservoir and fracturing effect are comprehensively analyzed, providing a basis for the evaluation of the reservoir and fracturing effect and the optimization of the fracturing plan, realizing accurate evaluation of the reservoir and fracturing effect, and shortening the total test period and cost of the downhole TV terminal 8 and the production profile monitoring.

[0021] According to actual needs, the above-mentioned oil-producing horizontal well production fluid profile and downhole television integrated testing system can be further optimized and / or improved: Embodiment 2: As an optimization of the above embodiment, a turbine speed probe, a density probe, a water holdup probe, a pressure probe and a temperature probe are provided in the array probe production profile logging instrument 3. In this way, the turbine speed, fluid density, water holdup, pressure and temperature data of the horizontal well section can be collected.

[0022] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1As shown, step five is to start production, and after the production and oil and water are stable, the ground equipment is connected to the array probe production profile logging instrument 3 through the multi-core cable 1, and the coiled tubing 2 is lifted at a uniform speed, and the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe are monitored and judged in real time whether they are working properly. After the horizontal section test is completed, the coiled tubing 2 is lowered to the toe of the horizontal well again, and the lifting speed is determined according to the working conditions of each probe last time, and the coiled tubing 2 is lifted at a uniform speed, and the working conditions of the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe are judged in real time and the production profile data are collected. The production profile data includes turbine speed, fluid density, water holding rate, pressure and temperature. In this way, the influence of the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe during the test can be reduced, and the accuracy of the test results can be improved, thereby improving the accuracy of the interpretation results.

[0023] Embodiment 4: As an optimization of the above embodiment, the multi-core cable 1 in step 2 is a seven-core cable, three of which are connected to the production profile tester, and two of which are connected to the light source 7 and the downhole TV terminal 8, respectively. After the multi-core cable 1 is connected to the production profile tester, the light source 7 and the downhole TV terminal 8, the following steps are performed: The first step is to conduct power-on tests on the production profile tester, the light source 7 and the downhole TV terminal 8 respectively to verify whether the performance of the production profile tester, the light source 7 and the downhole TV terminal 8 is intact; If yes, proceed to step 2; If not, check and repair the fluid production profile tester, light source 7 and downhole television terminal 8 respectively until they are powered on and tested to be in good condition, and then proceed to the second step.

[0024] The second step is to pump clean water into the coiled tubing 2 to verify whether the well-washing nozzle 6 is working properly; If the well-washing nozzle 6 works normally, proceed to step 3; If the well-washing nozzle 6 works abnormally, the well-washing nozzle 6 is inspected and repaired until the well-washing nozzle 6 works normally, and then the process goes to step three.

[0025] The remaining two core cables in the multi-core cable 1 are used as standby. In this way, two testing processes can be selected when the test string is underground, which reduces the difficulty of operation.

[0026] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, step three is to lower the test string into the well. When the test string is 150 to 250 meters into the well, the ground equipment is connected to the light source 7 and the downhole TV terminal 8 through the multi-core cable 1, and the test string is continued to be lowered to observe whether the casing coupling is clear; If it is not clear, take out the test pipe column and replace the light source 7, and repeat the above process until the casing coupling is clearly observed; If it is clear, continue to lower the test string to above the perforation cluster at the heel of the horizontal well.

[0027] In this way, the light source 7 is maintained in a timely manner, so that the fracturing effect of each perforation cluster in the well can be continuously obtained.

[0028] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, step 4 is to lower the lowering speed after the test string is lowered to 15-25 meters above the horizontal well heel end perforation cluster, and monitor the changes in the holes of each perforation cluster after fracturing through the downhole TV terminal 8 until the lower end of the test string moves to the horizontal well toe end. After the monitoring is completed, the surface equipment is disconnected from the multi-core cable 1. In this way, the changes in the holes of each perforation cluster can be observed and analyzed intuitively, which is convenient for the subsequent evaluation of the fracturing effect of each perforation cluster and provides a basis for the later fracturing transformation plan.

[0029] Embodiment 7: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, in step 4, if the casing in front of the downhole TV terminal 8 is blurred, clean water is pumped into the coiled tubing 2, and the well washing nozzle 6 sprays high-pressure water to clean the area in front of the downhole TV terminal 8. After the pump is turned on on the ground, clean water is pumped into the coiled tubing 2, so that the inner wall of the wellbore can be clearly observed through the downhole TV terminal 8, thereby improving the efficiency and success rate of the test work.

[0030] The specific process of the oil-producing horizontal well production profile and downhole television integrated testing system in this embodiment is as follows: Step 1: Horizontal well N1, with a vertical depth of 4,600 meters and a horizontal section length of 1,200 meters, was subjected to 15-stage fracturing with a perforated bridge plug, and then the well was withdrawn for trial production. The bridge plug was drilled and flushed through the coiled tubing, and clean water was injected into the wellbore before the well was shut down. Step 2: Prepare a 6500-meter-long continuous oil pipe 2 with seven-core cables. Connect the lower end of the continuous oil pipe 2 with the array probe production profile logging instrument 3, the centralizer 4, the check valve 5, the well-washing nozzle 6, the light source 7 and the downhole TV terminal 8 in order from top to bottom. Connect the No. 1, 2 and 3 core cables of the seven-core cable to the array probe production profile logging instrument 3, the No. 4 core cable to the light source 7, the No. 5 core cable to the downhole TV terminal 8, and the No. 6 and 7 core cables for standby use. Then, conduct power-on tests on the production fluid profile tester, the light source 7 and the downhole TV terminal 8 respectively. When the power-on tests on the production fluid profile tester, the light source 7 and the downhole TV terminal 8 are qualified, pump clean water into the continuous oil pipe 2, and the well-washing nozzle 6 works normally. Step 3: In the shut-in state, after the test string is 200 meters into the well, the surface equipment connects the light source 7 and the downhole TV terminal 8 through the No. 4 core cable and the No. 5 core cable, and continues to lower the test string. Observe that the casing coupling is clear, and continue to lower the test string to 4750 meters at the heel of the horizontal well; Step 4: The lower end of the test string is 20 meters away from the last level (15th level) perforation cluster (4770 to 4771 meters). The test string continues to be lowered at a speed of 3 meters / minute. When it reaches the hole of the perforation cluster, it is lowered at a speed of 1 meter / minute and monitoring begins. After measuring the 15th level perforation cluster, the test string continues to be lowered at a speed of 3 meters / minute to reach the 14th level perforation cluster (4780 to 4781 meters). It is lowered at a speed of 1 meter / minute and monitoring begins. If the area in front of the downhole TV terminal 8 is blurred, start the pump on the ground to pump clean water into the test string, and spray high-pressure water from the well washing nozzle 6 to rinse the area in front of the downhole TV terminal 8. After completing the monitoring of the 14th level perforation cluster, continue to lower the downhole TV terminal 8 until the monitoring of the 1st level perforation cluster is completed, and then disconnect the ground equipment from the No. 4 and No. 5 core cables; Step 5, start the well production. After the production and oil and water are stable, the ground equipment is connected to the array probe production profile logging instrument 3 through the No. 1, 2, and 3 core cables, and the test string is uniformly pulled up at a speed of 10 meters per minute. When it is pulled up to 5600 meters, the turbine speed is abnormally low, and the density probe, water holding probe, pressure probe and temperature probe are working normally. The test string is continued to be pulled up to 5550 meters. At this time, the turbine speed is normal. In the early stage, foreign matter may have stuck the turbine, causing the turbine speed to be abnormally low. After the horizontal section test is completed, the test string is lowered to the toe of the horizontal well, and the test string is uniformly pulled up at a speed of 15 meters per minute. The turbine speed probe, density probe, water holding probe, pressure probe and temperature probe are working normally and the production profile data are collected. The production profile data includes the turbine speed, fluid density, water holding rate, pressure and temperature collected by the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe respectively; Step 6: After receiving the qualified production profile data, the surface equipment is disconnected from the No. 1, 2, and 3 core cables, and the test string is pulled out; Step seven, according to the monitoring information analysis of the downhole TV terminal 8, 60% of the holes of the N1 well have proppant entering, and they are mainly concentrated in individual perforation clusters. The degree of hole erosion is 20%-330%, with an average of 81%. The temporary plugging scheme of fracturing should be further optimized in the later stage to balance the liquid inflow of each perforation cluster. The monitoring of the liquid production profile reflects that: in the 7th and 8th level perforation clusters, the increase in turbine speed is low. The downhole TV terminal 8 observes that the holes of these two levels of perforation clusters are basically not eroded. The two verify each other. Comprehensively evaluating that the holes of these two levels of perforation clusters have not been opened, the production capacity contribution is small, the physical properties and oil and gas content of the 7th and 8th level perforation clusters are good, and secondary repeated fracturing can be preferred.

[0031] 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. An integrated testing system for the production profile of oil-producing horizontal wells and downhole television, characterized in that The steps include: Step 1: clean the sand, debris and crude oil in the wellbore, inject clean water into the wellbore, and then shut in the well; Step 2: Install the test string together, the test string includes a multi-core cable and a coiled tubing, an array probe production profile logging instrument, a centralizer, a check valve, a light source and a downhole TV terminal connected together from top to bottom, a plurality of well washing nozzles are arranged at intervals outside the check valve, and the multi-core cable passes through the coiled tubing and is respectively connected to the production fluid profile tester, the light source and the downhole TV terminal; Step 3, lowering the test string into the well; Step 4: After the test string is lowered to the set position above the perforation cluster at the heel end of the horizontal well, the lowering speed is reduced. During the lowering, the downhole TV terminal is used to monitor the changes in the perforation holes of each perforation cluster after fracturing until the lower end of the test string moves to the toe end of the horizontal well; Step 5: Start production. After the production and oil and water content are stable, the surface equipment is connected to the array probe production profile logging instrument through a multi-core cable. When the coiled tubing is pulled up at a uniform speed, the array probe production profile logging instrument is used to collect production fluid profile data until the lower end of the test string moves to the heel of the horizontal well. Step 6: After receiving qualified production profile data, disconnect the surface equipment from the multi-core cable and remove the test string; Step seven: Analyze the abrasion of each perforation cluster according to the monitoring information of the downhole TV terminal, evaluate the crack initiation law of each perforation cluster and the uniformity of opening of each perforation cluster under different fracturing pumping parameters; obtain the interpretation results of the liquid production profile according to the production profile data collected by the array probe production profile logging instrument and the opening status of each perforation cluster monitored by the downhole TV terminal.

2. The oil-producing horizontal well production fluid profile and downhole television integrated testing system according to claim 1 is characterized in that The array probe production profile logging tool is equipped with a turbine speed probe, a density probe, a water holding probe, a pressure probe and a temperature probe.

3. The oil-producing horizontal well production fluid profile and downhole television integrated testing system according to claim 2 is characterized in that Step five is to start production at the well. After the production and oil and water are stable, the ground equipment is connected to the array probe production profile logging instrument through a multi-core cable, and the coiled tubing is pulled up at a uniform speed to monitor and judge in real time whether the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe are working properly. After the horizontal section test is completed, the coiled tubing is lowered to the toe of the horizontal well again. The pulling-up speed is determined according to the working conditions of each probe last time, and the coiled tubing is pulled up at a uniform speed to judge the working conditions of the turbine speed probe, density probe, water holding probe, pressure probe and temperature probe in real time and collect the production liquid profile data. The production liquid profile data includes turbine speed, fluid density, water holding rate, pressure and temperature.

4. The integrated testing system for the production profile of oil-producing horizontal wells and downhole television according to claim 1, 2 or 3, characterized in that The multi-core cable in step 2 is a seven-core cable, three of which are connected to the production profile tester, and two of which are connected to the light source and the downhole TV terminal. After the multi-core cable is connected to the production profile tester, the light source and the downhole TV terminal, the following steps are performed: The first step is to conduct power-on tests on the production fluid profile tester, light source and downhole TV terminal to verify whether the performance of the production fluid profile tester, light source and downhole TV terminal is intact; If yes, proceed to step 2; If not, the production fluid profile tester, light source and downhole TV terminal are inspected and repaired respectively until the production fluid profile tester, light source and downhole TV terminal are powered on and tested to be in good condition, and then the second step is entered; The second step is to pump clean water into the coiled tubing to verify whether the well-washing nozzle is working properly; If the well-washing nozzle works normally, proceed to step 3; If the well-washing nozzle does not work properly, check and repair the well-washing nozzle until it works properly, and then proceed to step three.

5. The oil-producing horizontal well production fluid profile and downhole television integrated testing system according to claim 1, 2 or 3, characterized in that Step three is to lower the test string into the well. When the test string is 150 to 250 meters into the well, the surface equipment is connected to the light source and the downhole TV terminal through a multi-core cable, and the test string is continued to be lowered to observe whether the casing coupling is clear. If it is not clear, take out the test pipe column and replace the light source, and repeat the above process until the casing coupling is clearly observed; If it is clear, continue to lower the test string to above the perforation cluster at the heel of the horizontal well.

6. The oil-producing horizontal well production fluid profile and downhole television integrated testing system according to claim 4, characterized in that Step three is to lower the test string into the well. When the test string is 150 to 250 meters into the well, the surface equipment is connected to the light source and the downhole TV terminal through a multi-core cable, and the test string is continued to be lowered to observe whether the casing coupling is clear. If it is not clear, take out the test pipe column and replace the light source, and repeat the above process until the casing coupling is clearly observed; If it is clear, continue to lower the test string to above the perforation cluster at the heel of the horizontal well.

7. The integrated testing system for the production profile of oil-producing horizontal wells and downhole television according to claim 1, 2, 3 or 6, characterized in that Step 4 is to lower the test string to 15 to 25 meters above the perforation cluster at the heel end of the horizontal well and then reduce the lowering speed. The changes in the perforation holes of each perforation cluster after fracturing are monitored through the downhole TV terminal until the lower end of the test string moves to the toe end of the horizontal well. After the monitoring is completed, the ground equipment is disconnected from the multi-core cable.

8. The oil-producing horizontal well production fluid profile and downhole television integrated testing system according to claim 4 is characterized in that Step 4 is to lower the test string to 15 to 25 meters above the perforation cluster at the heel end of the horizontal well and then reduce the lowering speed. The changes in the perforation holes of each perforation cluster after fracturing are monitored through the downhole TV terminal until the lower end of the test string moves to the toe end of the horizontal well. After the monitoring is completed, the ground equipment is disconnected from the multi-core cable.

9. The oil-producing horizontal well production fluid profile and downhole television integrated testing system according to claim 5, characterized in that Step 4 is to lower the test string to 15 to 25 meters above the perforation cluster at the heel end of the horizontal well and then reduce the lowering speed. The changes in the perforation holes of each perforation cluster after fracturing are monitored through the downhole TV terminal until the lower end of the test string moves to the toe end of the horizontal well. After the monitoring is completed, the ground equipment is disconnected from the multi-core cable.

10. The oil-producing horizontal well production fluid profile and downhole television integrated testing system according to claim 7, characterized in that In step 4, if the casing in front of the downhole TV terminal is blurred, clean water is pumped into the coiled tubing, and the well washing nozzle sprays high-pressure water to clean the area in front of the downhole TV terminal.

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