Integrated testing method for liquid production profile and downhole television of oil production horizontal well

Abstract

The present application relates to oil and gas well testing technology field, and is a kind of oil production level well liquid production profile and downhole television integrated testing method, comprising the following steps: step one, clean sand, scrap and crude oil in wellbore, inject clean water into wellbore, then shut in;Step two, install the test string together, the test string includes multicore cable and coiled tubing, array probe production profile logging instrument, centralizer, one-way valve, light source and downhole television terminal connected together from top to bottom in order.The test string of the present application can complete two kinds of testing work in one trip into well, improve the accuracy of interpretation result, solve the problem of long construction cycle and high cost of separately monitoring oil production level well liquid production profile and downhole television terminal hole monitoring after fracturing, according to the opening condition of each perforating cluster monitored by downhole television terminal and liquid production profile data, comprehensively analyze reservoir and fracturing effect, provide basis for reservoir and fracturing effect evaluation and fracturing scheme optimization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil and gas well testing, and is a liquid production profile and downhole television integrated testing method for oil production horizontal wells. BACKGROUND

[0002] Low-permeability oil and gas resources are widely distributed in China, and have a high proportion of reserves and great development potential. Targeted reservoir reconstruction by fracturing for 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 strong reservoir heterogeneity, there is a large difference in productivity after segmented fracturing reconstruction, and it is urgent to understand the productivity and fracturing effect of each segment and cluster to provide an important basis for fine classification of reservoirs, optimization of fracturing reconstruction schemes and selection of layers for repeated fracturing.

[0003] A journal article entitled "Analysis of uniform fracture initiation degree of multiple cluster fractures based on perforation imaging monitoring" discloses that by conveying through a wireline coiled tubing, the degree of perforation hole erosion is monitored by perforation imaging, and then the uniformity of fracture initiation of each cluster and the entry of proppant are analyzed, thereby providing an important basis for optimizing pump injection programs, reducing gun erosion and improving the success rate of temporary plugging.

[0004] A patent document with publication number CN105937393B and title "Horizontal well drag type liquid production profile testing string and testing method thereof" discloses that a production profile tester is driven by a drag cable in the tubing to measure the liquid production and water content of different combined layers, the cable transmits data in real time, the liquid production and water content of each test layer are analyzed in real time, and the liquid production information of each production layer of the horizontal well is understood in a timely manner.

[0005] Horizontal well downhole television gun monitoring and liquid production profile monitoring are two testing methods that can evaluate reservoirs and fracturing effects from different angles, and each has its own advantages. For oil and water liquid production profile monitoring, array multi-probe testing has obvious advantages over distributed fiber monitoring technology. Currently, the two testing technologies of downhole television and liquid production profile are tested separately, and the advantages of the technologies are not complementary. Therefore, a liquid production profile and downhole television integrated testing method for oil production horizontal wells is urgently needed to accurately evaluate reservoirs and fracturing effects and shorten the total testing cycle and cost of downhole television terminal and liquid production profile monitoring. SUMMARY

[0006] The present application provides a liquid production profile and downhole television integrated testing method for oil production horizontal wells, which overcomes the shortcomings of the prior art and effectively solves the problems of long construction cycle and high cost in existing liquid production profile monitoring and downhole television gun monitoring after fracturing for oil production horizontal wells.

[0007] The technical solution of the present application is achieved by the following measures: a liquid production profile and downhole television integrated testing method for oil production horizontal wells, comprising the following steps:

[0008] Step one, clean up the sand, debris and crude oil in the wellbore, inject clean water into the wellbore, and then shut in;

[0009] Step two, assemble the test pipe string, which comprises a multi-core cable and, from top to bottom, a coiled tubing, an array probe production profile logging instrument, a centralizer, a check valve, a light source and a downhole television terminal, a plurality of well flushing nozzles being arranged at intervals outside the check valve, the multi-core cable being connected with the production profile tester, the light source and the downhole television terminal after passing through the coiled tubing;

[0010] Step three, lower the test pipe string into the well;

[0011] Step four, after the test pipe string is lowered to a set position above the perforation cluster at the toe of the horizontal well, lower the speed of lowering, monitor the changes of the perforation cluster holes after fracturing by using the downhole television terminal, and then move the lower end of the test pipe string to the toe of the horizontal well;

[0012] Step five, open the well for production, after the production and the oil-water stability, connect the surface equipment with the array probe production profile logging instrument through the multi-core cable, collect the production profile data by using the array probe production profile logging instrument when the coiled tubing is pulled up at a constant speed, and then move the lower end of the test pipe string to the heel of the horizontal well;

[0013] Step six, after the qualified production profile data are recorded, disconnect the surface equipment from the multi-core cable, and pull out the test pipe string;

[0014] Step seven, according to the monitoring information of the downhole television terminal, analyze the erosion of the perforation cluster holes, evaluate the fracture initiation law of the perforation cluster under different fracturing pump injection parameters and the opening uniformity of the perforation cluster, and obtain the production profile interpretation results according to the production profile data collected by the array probe production profile logging instrument and the opening of the perforation cluster monitored by the downhole television terminal.

[0015] The following is a further optimization or / and improvement of the above technical solutions:

[0016] The array probe production profile logging instrument can be provided with a turbine revolution probe, a density probe, a water holding probe, a pressure probe and a temperature probe.

[0017] The fifth step is that, after the production and the oil-water stability, the surface equipment is connected with the array probe production profile logging instrument through the multi-core cable, the coiled tubing is pulled up at a constant speed, and it is judged whether the turbine revolution probe, the density probe, the water holding probe, the pressure probe and the temperature probe are working normally in real time. After the horizontal section test is completed, the coiled tubing is lowered to the toe end of the horizontal well again, the pulling speed is determined according to the working condition of each probe last time, the coiled tubing is pulled up at a constant speed, and the working condition of the turbine revolution probe, the density probe, the water holding probe, the pressure probe and the temperature probe is judged in real time and the production profile data is collected. The production profile data includes the turbine revolution, the fluid density, the water holding rate, the pressure and the temperature.

[0018] The multi-core cable in the second step is a seven-core cable. Three cores of the multi-core cable are connected with the production profile tester, two cores of the multi-core cable are connected with the light source and the downhole television terminal respectively. After the multi-core cable is connected with the production profile tester, the light source and the downhole television terminal respectively, the following steps are performed:

[0019] Firstly, the production profile tester, the light source and the downhole television terminal are tested respectively, and it is verified whether the performance of the production profile tester, the light source and the downhole television terminal is good.

[0020] If yes, the second step is entered.

[0021] If no, the production profile tester, the light source and the downhole television terminal are checked and repaired respectively until the performance of the production profile tester, the light source and the downhole television terminal is good after the production profile tester, the light source and the downhole television terminal are tested with power on, and then the second step is entered.

[0022] Secondly, clean water is pumped into the coiled tubing, and it is verified whether the washing nozzle works normally.

[0023] If the washing nozzle works normally, the third step is entered.

[0024] If the washing nozzle works abnormally, the washing nozzle is checked and repaired until the washing nozzle works normally, and then the third step is entered.

[0025] The third step is that, when the test string is lowered into the well for 150 to 250 meters, the surface equipment is connected with the light source and the downhole television terminal through the multi-core cable, the test string is continuously lowered, and it is observed whether the casing collar is clear.

[0026] If not, the test string is pulled out and the light source is replaced, and the above process is repeated until the casing collar is clear.

[0027] If yes, the test string is continuously lowered to the perforation cluster above the heel end of the horizontal well.

[0028] In step four, the test string is lowered to a point 15 to 25 meters above the horizontal well heel perforation cluster, and the lowering speed is reduced. 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 horizontal well toe. After the monitoring is completed, the surface equipment is disconnected from the multi-core cable.

[0029] 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.

[0030] 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, realizing accurate evaluation of reservoir and fracturing effect, and shortening the total test period and cost of downhole TV terminal and production profile monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Attachment Figure 1 This is a schematic diagram of the main cross-sectional structure of Example 1.

[0032] The codes in the attached figure are: 1 for multi-core cable, 2 for continuous oil tubing, 3 for array probe production profile logging instrument, 4 for centralizer, 5 for check valve, 6 for well flushing nozzle, 7 for light source, and 8 for downhole TV terminal. DETAILED DESCRIPTION

[0033] The present invention is not limited to the following embodiments, and specific implementation methods can be determined based on the technical solutions of the present invention and actual conditions.

[0034] In the present invention, for the convenience of description, the relative position relationship of each component is described based on the Figure 1 For example, the positional relationships of front, back, up, down, left, and right are determined according to the layout directions of the drawings in the specification.

[0035] The present invention will be further described below in conjunction with the embodiments and accompanying drawings:

[0036] Example 1: As shown in the attached Figure 1 As shown, the integrated testing method for the production profile of a horizontal oil-producing well and downhole television includes the following steps:

[0037] Step 1: clean the sand, debris and crude oil in the wellbore, inject clean water into the wellbore, and then shut in the well;

[0038] Step two, install the test pipe column together, the test pipe column includes the multicore cable 1 and the coiled tubing 2, the array probe production profile logging instrument 3, the centralizer 4, the check valve 5, the light source 7 and the downhole television terminal 8 connected together from top to bottom in order, a plurality of well flushing nozzles 6 are arranged at the outside of the check valve 5, the multicore cable 1 is connected with the production profile tester, the light source 7 and the downhole television terminal 8 respectively after passing through the coiled tubing 2;

[0039] Step three, lower the test pipe column into the well;

[0040] Step four, after the test pipe column is lowered to the set position above the perforation cluster at the heel of the horizontal well, lower the speed, monitor the changes of the perforation cluster holes after fracturing by using the downhole television terminal during lowering, until the lower end of the test pipe column moves to the toe of the horizontal well;

[0041] Step five, open the well for production, after the yield and the oil-water stability, connect the surface equipment with the array probe production profile logging instrument 3 through the multicore cable 1, collect the production profile data by using the array probe production profile logging instrument 3 when the coiled tubing 2 is pulled up at a uniform speed, until the lower end of the test pipe column moves to the heel of the horizontal well;

[0042] Step six, after the qualified production profile data is recorded, disconnect the surface equipment from the multicore cable 1, and pull out the test pipe column;

[0043] Step seven, according to the monitoring information of the downhole television terminal 8, analyze the erosion of the perforation cluster holes, evaluate the crack initiation law of the perforation cluster under different fracturing pump injection parameters and the opening uniformity of the perforation cluster, and obtain the production profile interpretation results according to the production profile data collected by the array probe production profile logging instrument 3 and the opening of the perforation cluster monitored by the downhole television terminal 8.

[0044] According to the needs, the light source 7 is the existing known LED light source, and the downhole television terminal 8 is the existing known downhole imaging equipment. In this way, two test works can be completed in one trip into the well, the two test works are complementary, the accuracy of the interpretation results is improved, the problems of long construction period and high cost of separately performing the production profile monitoring of the production horizontal well and the hole monitoring of the downhole television terminal 8 after fracturing are solved, the reservoir and fracturing effect are comprehensively analyzed according to the opening of the perforation cluster monitored by the downhole television terminal 8 and the production profile data, which provides a basis for the evaluation of the reservoir and fracturing effect and the optimization of the fracturing scheme, realizes the accurate evaluation of the reservoir and fracturing effect, and shortens the total test period and cost of the downhole television terminal 8 and the production profile monitoring.

[0045] The production profile and downhole television integrated test method of the production horizontal well can be further optimized or / and improved according to actual needs:

[0046] Example 2: As an optimization of the above example, the array probe production profile logging tool 3 is equipped with a turbine speed probe, density probe, water holdup probe, pressure probe, and temperature probe. This allows the acquisition of turbine speed, fluid density, water holdup, pressure, and temperature data for the horizontal well section.

[0047] Example 3: As an optimization of the above embodiment, as shown in the attached Figure 1 As shown, step five is to start production at the well. After the production and oil and water content stabilize, the surface equipment is connected to the array probe production profile logging instrument 3 via a multi-core cable 1. The coiled tubing 2 is raised at a constant speed to monitor and determine in real time whether the turbine speed probe, density probe, water holdup probe, pressure probe, and temperature probe are functioning properly. After the horizontal section test is completed, the coiled tubing 2 is lowered again to the toe of the horizontal well. The current raising speed is determined based on the previous working conditions of each probe. The coiled tubing 2 is raised at a constant speed to determine the working conditions of the turbine speed probe, density probe, water holdup probe, pressure probe, and temperature probe in real time and collect production profile data. The production profile data includes turbine speed, fluid density, water holdup, pressure, and temperature. This can reduce the impact of the turbine speed probe, density probe, water holdup probe, pressure probe, and temperature probe during testing, improve the accuracy of the test results, and thus improve the accuracy of the interpretation results.

[0048] Example 4: As an optimization of the above example, 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:

[0049] The first step is to conduct power-on tests on the production profile tester, the light source 7 and the downhole television terminal 8 to verify whether the performance of the production profile tester, the light source 7 and the downhole television terminal 8 is intact;

[0050] If yes, proceed to step 2;

[0051] If not, the production profile tester, light source 7 and downhole television terminal 8 are inspected and repaired respectively until the production profile tester, light source 7 and downhole television terminal 8 are powered on and tested to show that their performance is intact, and then proceed to the second step.

[0052] The second step is to pump clean water into the coiled tubing 2 to verify whether the well flushing nozzle 6 is working properly;

[0053] If the well-washing nozzle 6 works normally, proceed to step 3;

[0054] If the well-washing nozzle 6 does not work properly, the well-washing nozzle 6 is inspected and repaired until the well-washing nozzle 6 works properly, and then the process proceeds to step three.

[0055] The remaining two cores of the multi-core cable 1 are in reserve. In this way, two test processes can be selected when the test string is downhole, reducing the difficulty of operation.

[0056] Example five: as an optimization of the above examples, as shown in the accompanying Figure 1 Figure 3, step three is to lower the test string into the well, when the test string is 150-250 meters into the well, the ground equipment is connected to the light source 7 and the downhole television terminal 8 through the multi-core cable 1 respectively, continue to lower the test string, and observe whether the casing collar is clear;

[0057] If not, replace the light source 7 after the test string is pulled out, and repeat the above process until the casing collar is observed to be clear.

[0058] If it is clear, continue to lower the test string to the toe perforation cluster of the horizontal well.

[0059] In this way, the light source 7 is maintained in time, so that the fracturing effect of each perforation cluster downhole can be continuously obtained.

[0060] Example six: as an optimization of the above examples, as shown in the accompanying Figure 1 Figure 4, step four is to lower the test string to 15-25 meters above the toe perforation cluster of the horizontal well, then reduce the lowering speed, monitor the changes of the perforation cluster holes after fracturing through the downhole television terminal 8, until the lower end of the test string moves to the toe of the horizontal well, and after completing the monitoring, disconnect the ground equipment from the multi-core cable 1. In this way, the changes of the perforation cluster holes can be observed and analyzed intuitively, which is convenient for subsequent evaluation of the fracturing effect of each perforation cluster, and provides a basis for the fracturing modification scheme in the later stage.

[0061] Example seven: as an optimization of the above examples, as shown in the accompanying Figure 1 Figure 5, in step four, if the casing in front of the downhole television terminal 8 is blurred, pump clean water into the coiled tubing 2, and the well flushing nozzle 6 sprays high-pressure water to flush the area in front of the downhole television terminal 8. Pump clean water into the coiled tubing 2 after the pump is opened on the ground, so that the inner wall of the wellbore can be clearly observed through the downhole television terminal 8, improving the efficiency and success rate of the test work.

[0062] The specific process of the oil production horizontal well fluid production profile and downhole television integrated testing method of the present embodiment is as follows:

[0063] Step one, horizontal well N1, vertical depth 4600 meters, horizontal section length 1200 meters, after 15-stage fracturing modification by perforating bridge plug, liquid withdrawal test production, drill and mill the bridge plug through the coiled tubing and flush the wellbore clean, inject clean water into the wellbore and shut in;

[0064] Step two, prepare 6500 meters long coiled tubing 2 with seven-core cable, the lower end of the coiled tubing 2 is connected from top to bottom in turn array probe production profile logging instrument 3, centralizer 4, check valve 5, well flushing nozzle 6, light source 7 and downhole television terminal 8, 1, 2, 3 core cable in seven-core cable is connected with array probe production profile logging instrument 3, 4 core cable is connected with light source 7, 5 core cable is connected with downhole television terminal 8, 6, 7 core cable is spare. Then respectively on liquid production profile testing instrument, light source 7 and downhole television terminal 8 power test, when liquid production profile testing instrument, light source 7 and downhole television terminal 8 power test qualified, pump clean water into coiled tubing 2, well flushing nozzle 6 works normally;

[0065] Step three, in the closed state, after the test string is put into the well for 200 meters, the ground equipment connects light source 7 and downhole television terminal 8 through 4 core cable and 5 core cable, continues to put the test string into the well, observes the clear casing collar, and continues to put the test string into the well to the heel end of the horizontal well at 4750 meters;

[0066] Step four, the lower end of the test string is 20 meters away from the last stage (15th stage) perforation cluster (4770-4771 meters), the test string continues to be put into the well at a speed of 3 meters / minute, when reaching the perforation hole of the perforation cluster, it is put down at a speed of 1 meter / minute and starts to monitor, after monitoring the 15th stage perforation cluster, the test string continues to be put into the well at a speed of 3 meters / minute, reaches the 14th stage perforation cluster (4780-4781 meters), is put down at a speed of 1 meter / minute and starts to monitor, if the area in front of the downhole television terminal 8 is blurred, the ground pumps clean water into the test string, the high-pressure water is sprayed from the well flushing nozzle 6 to flush the area in front of the downhole television terminal 8, after monitoring the 14th stage perforation cluster, the downhole television terminal 8 continues to be put into the well until monitoring the 1st stage perforation cluster, then the ground equipment and 4 core cable and 5 core cable are disconnected;

[0067] Step five, open the well for production, after the yield and oil-water stability, the ground equipment is connected through 1, 2, 3 core cable and array probe production profile logging instrument 3, and is lifted at a uniform speed of 10 meters / minute, when reaching 5600 meters, the turbine revolution is abnormally low, the density probe, the water holding probe, the pressure probe and the temperature probe work normally, the test string continues to be lifted to 5550 meters, at this time the turbine revolution is normal, the turbine revolution may be abnormally low due to the foreign matter blocking the turbine in the early stage, after the horizontal section test is completed, the test string is put down to the toe end of the horizontal well, and the test string is lifted at a uniform speed of 15 meters / minute, the turbine revolution probe, the density probe, the water holding probe, the pressure probe and the temperature probe work normally and collect the liquid production profile data, the liquid production profile data includes the turbine revolution, the fluid density, the water holding rate, the pressure and the temperature collected by the turbine revolution probe, the density probe, the water holding probe, the pressure probe and the temperature probe respectively;

[0068] Step six, after the qualified production profile data is recorded, the ground equipment is disconnected from the No. 1, 2 and 3 core cables, and the testing pipe column is pulled out;

[0069] Step seven, according to the analysis of the monitoring information of the downhole television terminal 8, 60% of the perforation holes of the well 60 have proppants entering, and the proppants mainly concentrate in individual perforation clusters. The perforation hole abrasion degree is 20%-33%, and the average value is 81%. The fracturing temporary plugging scheme should be further optimized in the later stage, the liquid inflow of each perforation cluster should be balanced, and the production profile monitoring reflects that the turbine revolution increment is low when the 7th and 8th perforation clusters are reached. The downhole television terminal 8 observes that the perforation holes of the two perforation clusters are basically not abraded, and the two are verified with each other. It is comprehensively evaluated that the perforation holes of the two perforation clusters are not crushed, the contribution to the production capacity is small, the 7th and 8th perforation clusters have good physical properties and oil and gas content, and the two perforation clusters can be preferably selected for secondary repeated fracturing.

[0070] The above technical features constitute the embodiments of the present application, have strong adaptability and implementation effect, and can increase or decrease unnecessary technical features according to actual needs to meet the needs of different situations.

Claims

1. A method for integrated testing of the production profile of a horizontal oil well and downhole television, characterized in that The steps are as follows: 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, which includes a multi-core cable and, from top to bottom, a coiled tubing, an array probe production profile logging instrument, a centralizer, a check valve, a light source, and a downhole television terminal. Several well-washing nozzles are spaced apart on the outside of the check valve. The multi-core cable passes through the coiled tubing and is connected to the production profile logging instrument, the light source, and the downhole television terminal, respectively. Step 3: lower the test string into the well; Step 4: After the test string is lowered to the set position above the horizontal well heel perforation cluster, the lowering speed is reduced. During the lowering, the changes in the perforation holes of each perforation cluster after fracturing are monitored using a downhole TV terminal until the lower end of the test string moves to the toe of the horizontal well. Step 5: Start production. After the production and oil and water content stabilize, the surface equipment is connected to the array probe production profile logging instrument via a multi-core cable. The array probe production profile logging instrument is used to collect production fluid profile data while the coiled tubing is pulled up at a constant speed 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 and remove the test string; Step seven: Based on the monitoring information from the downhole TV terminal, analyze the perforation erosion of each perforation cluster, evaluate the crack initiation pattern of each perforation cluster and the uniformity of the opening of each perforation cluster under different fracturing pumping parameters; obtain the production profile interpretation results based on 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 method for integrated testing of the production profile of a horizontal oil-producing well and downhole television according to claim 1, characterized in that The array probe production profile logging tool is equipped with a turbine speed probe, density probe, water holding probe, pressure probe and temperature probe.

3. The method for integrated testing of the production profile of a horizontal oil-producing well and downhole television according to claim 2, characterized in that Step five is to start production at the well. After the production and oil and water content are stable, the surface equipment is connected to the array probe production profile logging instrument via a multi-core cable, and the coiled tubing is pulled up at a uniform speed to monitor and determine in real time whether the turbine speed probe, density probe, water holdup 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 based on the previous working conditions of each probe. The coiled tubing is pulled up at a uniform speed to determine the working conditions of the turbine speed probe, density probe, water holdup probe, pressure probe and temperature probe in real time and collect production profile data. The production profile data includes turbine speed, fluid density, water holdup, pressure and temperature.

4. The method for integrated testing of the production profile of a horizontal oil-producing well 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 cores of the multi-core cable are connected to the production profile tester, and two cores of the cable are connected to the light source and the downhole TV terminal respectively. After the multi-core cable is connected to the production profile tester, the light source, and the downhole TV terminal respectively, 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 their performance is intact. If yes, proceed to step 2; If not, inspect and repair the production fluid profile tester, light source and downhole TV terminal respectively until they are powered on and tested to be in good condition, and then proceed to the second step; 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 properly, proceed to step three; If the well washing nozzle does not work properly, check and repair it until it works properly, then proceed to step three.

5. The method for integrated testing of the production profile of a horizontal oil-producing well and downhole television 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. The test string is further lowered to observe whether the casing coupling is clear. If it is not clear, take out the test string 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 heel perforation cluster of the horizontal well.

6. The method for integrated testing of the production profile of a horizontal oil-producing well and downhole television 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. The test string is further lowered to observe whether the casing coupling is clear. If it is not clear, take out the test string 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 heel perforation cluster of the horizontal well.

7. The method for integrated testing of the production profile of a horizontal oil-producing well and downhole television according to claim 1, 2, 3 or 6, characterized in that Step 4: After lowering the test string to a point 15 to 25 meters above the horizontal well heel perforation cluster, reduce the lowering speed 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 horizontal well toe. After completing the monitoring, disconnect the surface equipment from the multi-core cable.

8. The method for integrated testing of the production profile of a horizontal oil-producing well and downhole television according to claim 4, characterized in that Step 4: After lowering the test string to a point 15 to 25 meters above the horizontal well heel perforation cluster, reduce the lowering speed 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 horizontal well toe. After completing the monitoring, disconnect the surface equipment from the multi-core cable.

9. The method for integrated testing of the production profile of a horizontal oil-producing well and downhole television according to claim 5, characterized in that Step 4: After lowering the test string to a point 15 to 25 meters above the horizontal well heel perforation cluster, reduce the lowering speed 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 horizontal well toe. After completing the monitoring, disconnect the surface equipment from the multi-core cable.

10. The method for integrated testing of the production profile of a horizontal oil-producing well and downhole television 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.

Images