Horizontal well cluster segment liquid pumping production and fracturing integrated device and method

Abstract

This invention relates to the field of oil and gas field fracturing technology, and particularly to an integrated device and method for horizontal well cluster-level fluid extraction, production measurement, and fracturing. The technical solution is as follows: a multi-nozzle pressure-controlled switch jet pump and a first packer are connected to the casing downhole via tubing. Within the horizontal section, a production measurement and fracturing control valve and a water hammer wave monitor are connected via tubing. The production measurement and fracturing control valve and the water hammer wave monitor are located between the second and third packers. The advantages are: by coordinating the multi-nozzle pressure-controlled switch jet pump with the production measurement pump core of the storage-type downhole jet pump, fluid extraction and formation production data can be measured in cluster-level sections of the horizontal well. Furthermore, by moving the positions of the production measurement and fracturing control valve and the water hammer wave monitor, fracturing operations can be performed on the corresponding cluster sections requiring modification. Simultaneously, water hammer wave data can be measured at close range. A single drilling run completes the functions of fluid extraction, production measurement, and fracturing, resulting in low construction costs and high measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of oil and gas field fracturing technology, and in particular to an integrated device and method for horizontal well cluster-stage pumping, production measurement and fracturing. Background Technology

[0002] With the expansion of horizontal well development in low-permeability, unconventional oil and gas fields, shale oil and gas fields, and coalbed methane fields, the number of horizontal wells with multi-cluster fracturing is rapidly increasing. Multi-cluster fracturing in horizontal wells is a key technology for the efficient development of low-permeability, unconventional oil and gas reservoirs (such as shale gas and tight oil). Its core principle is to divide the horizontal well section into multiple fracturing segments (typically 15–30 or more segments) using tools such as bridge plugs and sliding sleeves, with 3–6 perforation clusters arranged within each segment. During fracturing, high-pressure fluid simultaneously initiates fracturing from multiple clusters, creating a dense, interwoven fracture system. This achieves "storage volume transformation" (SRV) of the reservoir, allowing oil and gas to flow rapidly into the wellbore from all directions, forming a complex three-dimensional fracture network, thereby significantly improving oil and gas production capacity and recovery rate.

[0003] However, there is still a lack of economical and effective testing methods and equipment for assessing the artificial fracture conditions and actual production of each fracturing cluster. This has led to most horizontal wells adopting a completion and production model of fixed-interval perforation, segmented fracturing, and then generalized production. Limited by post-fracturing monitoring and evaluation methods and instruments, this also results in unclear reservoir stimulation quality and actual production profile balance in multi-cluster horizontal wells with generalized production, making it difficult to determine lower-level stimulation measures and leading to low actual reservoir utilization and production rates. Existing methods for evaluating actual production profiles using fracture tracing and dragging instruments for oil saturation and production profile testing are not accurate or reliable, and are time-consuming and expensive. This has resulted in existing multi-stage fracturing wells being put into production immediately after fracturing without being able to determine the actual stimulation effect of each stage. Furthermore, accurate and effective monitoring of dynamic production profiles is difficult after production commences. For deep, long-section fracturing wells, it is even more impossible to assess the fracture quality and productivity contribution of each cluster, or to conduct dynamic production assessments under varying production pressure differentials. Consequently, well sections with poor fracturing effects are either underutilized or not utilized at all, limiting well productivity and leading to unknowingly wasted resources.

[0004] For wells that have been fracturing and operating for many years, the actual production profile differs significantly from the initial production profile due to reservoir heterogeneity, variations in fracturing effects, and changes in underground dynamics. This leads to unclear reasons for declining production, excessively rapid production decline, and significant differences in utilization levels. Furthermore, the lack of more effective detection and testing hinders the improvement of recovery rates. Existing technologies such as tracer methods and microseismic methods suffer from low accuracy and reliability, high costs, and still rely on indirect calculations and comparisons of fracturing and production effects. Moreover, integrating the production profile with the selected fracturing section's construction string is difficult, resulting in numerous construction procedures, long construction times, potential reservoir contamination, and high costs. Currently, there is a lack of more efficient, inexpensive, and practical new methods and technologies.

[0005] Our company's Chinese patent application, "A Deep Horizontal Well Segmented Production Standardization and Acidizing Combined Operation Device and Method of Use," patent number ZL202418512559, is limited to segmented pumping production standardization and acidizing treatment of horizontal wells. It cannot evaluate the quality of individual fracturing fractures, nor can it use a single drilling string to re-fracturing and re-evaluate clusters with poor or ineffective fracturing results. Newly developed wellhead monitoring methods for detecting fracture data using water hammer waves during pump shutdown, such as the Chinese patent "A Fracturing Wellhead Water Hammer Wave Tester," patent number ZL202422911455.0, are installed at the wellhead. Due to the distance between the wellhead and the downhole, the signal is attenuated and interfered with by wellhead clutter, affecting and limiting the accuracy of monitoring water hammer waves and fracture parameters, as well as the interpretation of results. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned deficiencies in existing technologies by providing an integrated device and method for horizontal well cluster-based fluid extraction, production measurement, and fracturing. By coordinating a multi-nozzle pressure-controlled jet pump with a storage-type downhole jet pump core, it enables the measurement of formation fluid production data through cluster-based fluid extraction in horizontal wells. Furthermore, by dragging the tubing string, the production measurement and fracturing control valves and water hammer wave monitor are moved, allowing for fracturing modifications to the corresponding cluster sections. Simultaneously, water hammer wave data can be measured at closer range. A single tubing string operation completes both fluid extraction / production measurement and fracturing operations, resulting in low construction costs and high measurement accuracy.

[0007] This invention discloses an integrated device for segmented pumping, production measurement, and fracturing in horizontal wells. The device includes tubing, a multi-nozzle pressure-controlled switch jet pump, a first packer, a second packer, a production measurement and fracturing control valve, a water hammer wave monitor, a third packer, a plug, and a storage-type downhole jet pump production measurement core. The multi-nozzle pressure-controlled switch jet pump and the first packer are connected to the casing in the well via tubing, with the multi-nozzle pressure-controlled switch jet pump and the first packer located at the lower part of the vertical section. In the horizontal section, the second packer, the production measurement and fracturing control valve, the water hammer wave monitor, and the third packer are connected via tubing. The production measurement and fracturing control valve and the water hammer wave monitor are located between the second and third packers. A plug is installed at the bottom end of the tubing. During segmented measurement, the storage-type downhole jet pump production measurement core is inserted along the tubing, allowing the storage-type downhole jet pump production measurement core to sit inside the multi-nozzle pressure-controlled switch jet pump.

[0008] The aforementioned production measurement and fracturing control valve includes a control valve assembly, a control valve spring, a slide valve, a formation fluid inlet, a shear pin, a sliding sleeve, a fracturing fluid outlet, a lower retaining ring, a lower control valve connector, an upper control valve connector, and a spring retainer. The upper end of the control valve assembly has a control valve upper connector, and the lower end has a control valve lower connector. The upper inner cavity of the control valve assembly is sequentially equipped with a spring retainer, a control valve spring, and a slide valve. The slide valve and the formation fluid inlet on the outer wall of the control valve assembly enable the valve to switch on and off. The lower inner cavity of the control valve assembly is equipped with a sliding sleeve, which is mounted on the inner wall of the control valve assembly by a shear pin and closes the fracturing fluid outlet on the outer wall of the control valve assembly. A lower retaining ring is installed on the lower inner wall of the control valve assembly to receive the sliding sleeve that has been sheared off from above, thereby opening the fracturing fluid outlet.

[0009] Preferably, the above-mentioned multi-nozzle pressure-controlled switch jet pump includes a pump barrel, a diffusion chamber, a mixing chamber, a negative pressure chamber, a nozzle, a power fluid inlet, a switching valve, a spring, a lower connector, and a central cavity. The pump barrel has a central cavity at its center. Multiple jet injection units composed of a diffusion chamber, a mixing chamber, a negative pressure chamber, and a nozzle connected in sequence are provided in the upper middle part of the pump barrel. Multiple power fluid inlets are provided on the lower outer wall of the pump barrel. A lower connector is installed at the bottom end of the pump barrel. A switching valve is installed at the lower inlet end of the nozzle. The switching valve is located inside the power fluid inlet. A spring is installed at the lower end of the switching valve.

[0010] Preferably, the above-mentioned storage-type downhole jet pump production measurement pump core includes a retrieval head, a pump core body, a battery, a memory housing, and a combined sensor. The retrieval head is installed at the upper end of the pump core body, the memory housing is installed at the lower end, the battery is installed in the inner cavity of the pump core body, the memory is installed in the inner cavity of the memory housing, and the combined sensor is installed at the lower end of the memory housing.

[0011] Preferably, the outer diameter of the pump core body is larger than the outer diameter of the memory housing, and the outer diameter of the memory housing is larger than the outer diameter of the combined sensor. When pumping liquid for production measurement, the storage-type downhole jet pump production measurement pump core is put into the well. The lower end of the pump core body is in contact with the upper end of the central cavity of the pump barrel, so that the storage-type downhole jet pump production measurement pump core sits in the multi-nozzle pressure-controlled switch jet pump to measure data and store it in the memory.

[0012] Preferably, the outer diameter of the middle part of the control valve assembly is smaller than the outer diameter of both ends. The outer wall of the sliding sleeve is provided with multiple sealing rings for contacting and cooperating with the inner walls of the control valve assembly on the upper and lower sides of the fracturing fluid outlet. The lower end of the sliding sleeve is a cylindrical plug-in connector for cooperating and connecting with the lower retaining ring.

[0013] Preferably, the aforementioned water hammer wave monitor includes a monitor housing assembly, a pressure sensor module, a data storage module, a battery module, monitoring holes, an upper monitor connector, and a lower monitor connector. The upper monitor connector is located at the upper end of the monitor housing assembly, and the lower monitor connector is located at the lower end. The pressure sensor module, the data storage module, and the battery module are installed inside the monitor housing assembly. Multiple monitoring holes are provided on the outer wall of the monitor housing assembly and are connected to the pressure sensor module inside the monitor housing assembly. The data storage module and the battery module are installed separately from the pressure sensor module.

[0014] Preferably, the aforementioned storage-type downhole jet pump core for production testing is retrieved to the surface wellhead using a retrieval device. The retrieval device includes a retrieval device cylinder, a cup, a retrieval device spring, elastic claws, a movable support, and a guide limiting head. The guide limiting head is located at the lower end of the retrieval device cylinder, and a cup fixing body is installed at the upper end of the retrieval device cylinder, with a cup installed on the outer wall of the cup fixing body. The retrieval device spring, movable support, and elastic claws are installed inside the retrieval device cylinder. The retrieval device spring is installed between the upper part of the movable support and the lower end of the cup fixing body. Multiple elastic claws are connected to the lower end of the movable support, with the lower end of each elastic claw extending inward to grip the retrieval head of the storage-type downhole jet pump core for production testing.

[0015] Preferably, the above-mentioned elastic claws are in groups of 3-6 and form a cylindrical structure; the outer diameter of the movable support is smaller than the inner diameter of the inner wall of the retrieval device cylinder.

[0016] The method of using the horizontal well cluster-stage pumping, production measurement, and fracturing integrated device mentioned in this invention includes the following process:

[0017] 1. Connect the multi-nozzle pressure-controlled switch jet pump, first packer, second packer, production measurement and fracturing control valve, water hammer wave monitor and third packer through the tubing, and run them down into the well along the casing. Send the second packer, production measurement and fracturing control valve, water hammer wave monitor and third packer into the horizontal section. Then, set the first packer, second packer and third packer.

[0018] II. During production testing, a storage-type downhole jet pump core is inserted into the tubing at the surface wellhead. The core descends the tubing to the upper end of the multi-nozzle pressure-controlled switch jet pump and sits atop the central cavity of the pump barrel. A combined sensor is inserted into the central cavity. Then, at the surface wellhead, power fluid is injected downwards through the annulus of the tubing and casing. Once the power fluid pressure exceeds the spring pressure, the switch valve moves downwards, opening the power fluid inlet. The power fluid then enters through the opened inlet and... The fluid is ejected from the nozzle, which drives the formation fluid in the corresponding cluster between the second and third packers to enter the tubing cavity through the formation fluid inlet of the production measurement and fracturing control valve. Then, it enters the negative pressure chamber through the central chamber of the multi-nozzle pressure-controlled switch jet pump, mixes with the power fluid, and is discharged upward along the tubing to the surface through the mixing chamber and diffusion chamber. The combined sensor of the storage-type downhole jet pump production measurement pump core obtains and stores the temperature, pressure, flow rate parameters of the formation fluid in this cluster and the data of the formation fluid produced under different production pressure differentials.

[0019] 3. After the formation production test of a cluster segment is completed, the first, second, and third packers are released and the tubing is pulled upwards, which moves the production measurement and fracturing control valve and water hammer wave monitor of the horizontal section to the perforation position of the adjacent cluster segment. The first, second, and third packers are then re-set, and the power fluid is injected again for pumping. The temperature, pressure, and flow rate parameters of the formation production fluid of the second cluster segment are monitored and recorded. This step-by-step repeating operation is carried out to achieve segmented production measurement of all perforated and fracturing cluster segments downhole until the measurement is completed.

[0020] Fourth, the fishing device is then deployed into the tubing at the surface wellhead. The fishing device moves downward until it sits on top of the production testing pump core of the storage-type downhole jet pump and grabs the fishing head. Then, the power fluid is injected downward along the annulus of the tubing and casing at the surface wellhead. After the pressure of the power fluid is greater than the pressure of the spring, the switch valve moves downward to open the power fluid inlet. The power fluid enters the nozzle through the opened power fluid inlet and is accelerated and ejected. The extracted formation production fluid and the power fluid mix and push the cup on the upper side of the fishing device upward, thereby lifting the fishing device and the production testing pump core of the storage-type downhole jet pump together to the surface. The test data of the production testing pump core of the storage-type downhole jet pump is read and sorted on the surface, and the data is compared and analyzed to determine the parts, locations and fracturing construction parameters that need to be selected for re-fracturing.

[0021] 5. Unseal the first, second, and third packers. Drag the tubing to activate the production measurement and fracturing control valve and water hammer monitor in the horizontal section, aligning the production measurement and fracturing control valve with the cluster section requiring fracturing. Then, set the first, second, and third packers. Inject fracturing fluid into the tubing at the surface wellhead. The fracturing fluid travels along the tubing through the central cavity of the multi-nozzle pressure-controlled switch jet pump. At this point, the power fluid inlet is closed, and the fracturing fluid continues downward to the production measurement and fracturing control valve in the horizontal section. The fluid then flows through the spool valve... Under the action of the fracturing fluid, the formation fluid inlet is in a closed state. When the pressure of the fracturing fluid is greater than the shear force of the shear pin, the sliding sleeve falls down to the lower retaining ring, opening the fracturing fluid outlet. This allows the fracturing fluid to be ejected smoothly through the fracturing fluid outlet, further fracturing the fractures in the cluster. When fracturing is completed, the water hammer wave monitoring instrument records the water hammer wave information data when the pump is stopped and stores the monitoring data for analysis and evaluation of the formation fracturing and production capacity of the cluster. By repeatedly dragging the tubing, the re-fracturing construction and transformation of different clusters can be completed.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This invention tests and evaluates the actual production capacity of each cluster segment and the overall well production profile after horizontal well fracturing and production. A single construction string can be used to re-fracture low-yield cluster segments that require further fracturing. It can also measure the re-fracturing fracture parameters and the actual production capacity after fracturing. The construction is simple and reliable, the measurement accuracy is good, and the construction cost is low. It can significantly improve the production profile and increase production capacity and recovery rate.

[0024] 2. The multi-nozzle pressure-controlled switch jet pump of the present invention has the significant features of large internal flow channel, low fluid flow resistance and anti-clogging. The storage-type downhole jet pump production measurement pump core and production measurement and fracturing control valve have novel and reliable structure, adapt to a wide range of flow rate changes, and are more suitable for selective fracturing to enhance production and improve recovery rate after staged production assessment.

[0025] 3. This invention installs a water hammer wave monitor on one side of the production measurement and fracturing control valve in the horizontal section of the well. It uses the principle of detecting water hammer waves when the fracturing pump is stopped to calculate the fracture aggregate size and formation parameters. The principle is reliable, economical and practical. It has higher signal strength and monitoring accuracy than existing wellhead-mounted instruments. In addition, because it monitors fractures nearby, its water hammer wave signal transmission distance is short, the signal attenuation is reduced, it cleverly avoids surface clutter interference, is easy to identify, and the monitoring results are reliable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention during liquid extraction and measurement;

[0027] Figure 2 This is a schematic diagram of a multi-nozzle pressure-controlled switch jet pump;

[0028] Figure 3 This is a schematic diagram of the structure of the storage-type downhole jet pump core for production measurement.

[0029] Figure 4 This is a schematic diagram of the salvage device;

[0030] Figure 5 yes Figure 4 Schematic diagram of section AA in the diagram;

[0031] Figure 6 This is a schematic diagram of the structure when the production measurement and fracturing control valve is in the position of measuring formation fluid production;

[0032] Figure 7 This is a schematic diagram of the water hammer wave monitoring instrument;

[0033] Figure 8 This is a schematic diagram of the overall structure of the present invention during clustered segment fracturing;

[0034] Figure 9 This is a schematic diagram of the fracturing process using a multi-nozzle pressure-controlled switch jet pump.

[0035] Figure 10 This is a schematic diagram of the production measurement and fracturing control valve when it is in fracturing mode;

[0036] In the diagram: 1. Tubing; 2. Multi-nozzle pressure-controlled switch jet pump; 3. First packer; 4. Second packer; 5. Production measurement and fracturing control valve; 6. Water hammer wave monitor; 7. Third packer; 8. Plug; 9. Casing; 10. Storage-type downhole jet pump production measurement pump core; 11. Fishing device.

[0037] 2.1 Pump cylinder, 2.2 Diffusion chamber, 2.3 Mixing chamber, 2.4 Negative pressure chamber, 2.5 Nozzle, 2.6 Power fluid inlet, 2.7 Switch valve, 2.8 Spring, 2.9 Lower connector, 2.10 Central chamber;

[0038] 5.1 Control valve assembly, 5.2 Control valve spring, 5.3 Slide valve, 5.4 Formation fluid inlet, 5.5 Shear pin, 5.6 Lower sliding sleeve, 5.7 Fracturing fluid outlet, 5.8 Lower retaining ring, 5.9 Lower control valve connector, 5.10 Upper control valve connector, 5.11 Spring retainer, 5.6.1 Cylindrical plug connector;

[0039] 6.1 Monitor housing assembly, 6.2 Pressure sensor module, 6.3 Data storage module, 6.4 Battery module, 6.5 Monitoring port, 6.6 Upper connector of monitor, 6.7 Lower connector of monitor;

[0040] 10.1 Salvage head, 10.2 Pump core body, 10.3 Battery, 10.4 Memory housing, 10.5 Combined sensor;

[0041] The retrieval device includes: cylinder body 11.1, leather cup 11.2, retrieval device spring 11.3, elastic claw 11.4, movable support body 11.5, guide limit head 11.6, and leather cup fixing body 11.7. Detailed Implementation

[0042] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0043] Example 1, referring to Figures 1-7 The present invention discloses an integrated horizontal well cluster-stage pumping, production measurement, and fracturing device, comprising tubing 1, a multi-nozzle pressure-controlled switch jet pump 2, a first packer 3, a second packer 4, a production measurement and fracturing control valve 5, a water hammer wave monitor 6, a third packer 7, a plug 8, and a storage-type downhole jet pump production measurement pump core 10. The multi-nozzle pressure-controlled switch jet pump 2 and the first packer 3 are connected to the tubing 1 and lowered into the casing 9. The multi-nozzle pressure-controlled switch jet pump 2 and the first packer 3 are positioned... At the lower part of the vertical section; within the horizontal section, the second packer 4, the production measurement and fracturing control valve 5, the water hammer wave monitor 6, and the third packer 7 are connected via tubing 1. The production measurement and fracturing control valve 5 and the water hammer wave monitor 6 are located between the second packer 4 and the third packer 7. A plug 8 is installed at the bottom end of tubing 1. During segmented measurement, the storage-type downhole jet pump production measurement pump core 10 is inserted along tubing 1, so that the storage-type downhole jet pump production measurement pump core 10 sits inside the multi-nozzle pressure-controlled switch jet pump 2.

[0044] Reference Figure 2 The multi-nozzle pressure-controlled switch jet pump 2 mentioned in this invention includes a pump barrel 2.1, a diffusion chamber 2.2, a mixing chamber 2.3, a negative pressure chamber 2.4, a nozzle 2.5, a power fluid inlet 2.6, a switching valve 2.7, a spring 2.8, a lower connector 2.9, and a central cavity 2.10. The pump barrel 2.1 has a central cavity 2.10 at its center. The upper middle part of the pump barrel 2.1 has multiple jet injection units composed of the diffusion chamber 2.2, the mixing chamber 2.3, the negative pressure chamber 2.4, and the nozzle 2.5 connected in sequence. The lower outer wall of the pump barrel 2.1 has multiple power fluid inlets 2.6. The lower connector 2.9 is installed at the bottom end of the pump barrel 2.1. The switching valve 2.7 is installed at the lower inlet end of the nozzle 2.5. The switching valve 2.7 is located inside the power fluid inlet 2.6. The lower end of the switching valve 2.7 is installed with a spring 2.8.

[0045] Reference Figure 3The storage-type downhole jet pump production measurement pump core 10 mentioned in this invention includes a retrieval head 10.1, a pump core body 10.2, a battery 10.3, a memory housing 10.4, and a combined sensor 10.5. The retrieval head 10.1 is installed at the upper end of the pump core body 10.2, and the memory housing 10.4 is installed at the lower end. The battery 10.3 is installed in the inner cavity of the pump core body 10.2, and the memory is installed in the inner cavity of the memory housing 10.4. The combined sensor 10.5 is installed at the lower end of the memory housing 10.4.

[0046] The outer diameter of the pump core body 10.2 is larger than the outer diameter of the memory housing 10.4, and the outer diameter of the memory housing 10.4 is larger than the outer diameter of the combined sensor 10.5. During pumping and production measurement, the storage-type downhole jet pump production measurement pump core 10 is put into the well. The lower end of the pump core body 10.2 contacts and engages with the upper end of the central cavity 2.10 of the pump barrel 2.1, so that the storage-type downhole jet pump production measurement pump core 10 sits in the multi-nozzle pressure-controlled switch jet pump 2 to measure data and store it in the memory.

[0047] Reference Figure 6 The production measurement and fracturing control valve 5 mentioned in this invention includes a control valve assembly 5.1, a control valve spring 5.2, a slide valve 5.3, a formation fluid inlet 5.4, a shear pin 5.5, a sliding sleeve 5.6, a fracturing fluid outlet 5.7, a lower retaining ring 5.8, a lower control valve connector 5.9, an upper control valve connector 5.10, and a spring retainer 5.11. The upper end of the control valve assembly 5.1 is provided with the upper control valve connector 5.10, and the lower control valve connector 5.9 is provided with the lower control valve connector 5.9. The spring retainer 5.11 and the control valve are sequentially installed in the upper inner cavity of the control valve assembly 5.1. Spring 5.2 and slide valve 5.3 are connected to the formation fluid inlet 5.4 on the outer wall of control valve assembly 5.1 via slide valve 5.3 for switching. A sliding sleeve 5.6 is installed in the lower middle inner cavity of control valve assembly 5.1, and the sliding sleeve 5.6 is installed on the inner wall of control valve assembly 5.1 via shear pin 5.5, and closes the fracturing fluid outlet 5.7 on the outer wall of control valve assembly 5.1. A lower retaining ring 5.8 is installed on the lower inner wall of control valve assembly 5.1 to receive the sliding sleeve 5.6 that is sheared off from above, so as to open the fracturing fluid outlet 5.7.

[0048] Among them, the outer diameter of the middle part of the control valve assembly 5.1 is smaller than the outer diameter of both ends. The outer wall of the sliding sleeve 5.6 is provided with multiple sealing rings for contacting and cooperating with the inner wall of the control valve assembly 5.1 on the upper and lower sides of the fracturing fluid outlet 5.7. The lower end of the sliding sleeve 5.6 is a cylindrical plug 5.6.1 for cooperating and connecting with the lower retaining ring 5.8.

[0049] Reference Figure 7The water hammer wave monitor 6 mentioned in this invention includes a monitor housing assembly 6.1, a pressure sensor module 6.2, a data storage module 6.3, a battery module 6.4, monitoring holes 6.5, an upper monitor connector 6.6, and a lower monitor connector 6.7. The upper monitor connector 6.6 is provided at the upper end of the monitor housing assembly 6.1, and the lower monitor connector 6.7 is provided at the lower end. The pressure sensor module 6.2, the data storage module 6.3, and the battery module 6.4 are installed in the inner cavity of the monitor housing assembly 6.1. Multiple monitoring holes 6.5 are provided on the outer wall of the monitor housing assembly 6.1 and are connected to the pressure sensor module 6.2 in the inner cavity of the monitor housing assembly 6.1. The data storage module 6.3 and the battery module 6.4 are installed separately from the pressure sensor module 6.2.

[0050] Reference Figures 4-5 The storage-type downhole jet pump core 10 mentioned in this invention is retrieved to the surface wellhead by a retrieval device 11. The retrieval device 11 includes a retrieval device cylinder 11.1, a cup 11.2, a retrieval device spring 11.3, an elastic claw 11.4, a movable support body 11.5, and a guide limiting head 11.6. The guide limiting head 11.6 is located at the lower end of the retrieval device cylinder 11.1, and a cup fixing body 11.7 is installed at the upper end of the retrieval device cylinder 11.1. The outer wall of the cup fixing body 11.7... Install the cup 11.2; install the retrieval spring 11.3, the movable support body 11.5, and the elastic claw 11.4 in the inner cavity of the retrieval cylinder 11.1. The retrieval spring 11.3 is installed between the upper part of the movable support body 11.5 and the lower end of the cup fixing body 11.7. Multiple elastic claws 11.4 are connected to the lower end of the movable support body 11.5. The lower end of each elastic claw 11.4 extends inward to grab the retrieval head 10.1 of the storage-type downhole jet pump production measurement pump core 10.

[0051] The method of using the horizontal well cluster-stage pumping, production measurement, and fracturing integrated device mentioned in this invention includes the following process:

[0052] 1. Connect the multi-nozzle pressure-controlled switch jet pump 2, the first packer 3, the second packer 4, the production measurement and fracturing control valve 5, the water hammer wave monitor 6, and the third packer 7 through tubing 1, and run them down into the well along casing 9. Send the second packer 4, the production measurement and fracturing control valve 5, the water hammer wave monitor 6, and the third packer 7 into the horizontal section, and then set the first packer 3, the second packer 4, and the third packer 7.

[0053] 2. During production testing, a storage-type downhole jet pump core 10 is inserted into tubing 1 at the surface wellhead. The storage-type downhole jet pump core 10 descends along tubing 1 to the upper end of the multi-nozzle pressure-controlled switch jet pump 2 and sits on the upper end of the central cavity 2.10 of the pump barrel 2.1. The combined sensor 10.5 is inserted into the central cavity 2.10. Then, power fluid is injected downwards along the annulus of tubing 1 and casing 9 at the surface wellhead. After the pressure of the power fluid exceeds the pressure of spring 2.8, the switch valve 2.7 moves downwards to open the power fluid inlet 2.6, and the power fluid flows down through the opened power fluid inlet 2.6. The fluid enters and exits from nozzle 2.5, thereby driving the formation fluid of the corresponding cluster between the second packer 4 and the third packer 7 to enter the inner cavity of tubing 1 through the formation fluid inlet 5.4 of the production measurement and fracturing control valve 5. Then, it enters the negative pressure chamber 2.4 through the central chamber 2.10 of the multi-nozzle pressure-controlled switch jet pump 2. After mixing with the power fluid, it passes through the mixing chamber 2.3 and the diffusion chamber 2.2 and is discharged upward along tubing 1 to the surface. The combined sensor 10.5 of the storage-type downhole jet pump production measurement pump core 10 obtains and stores the temperature, pressure, flow rate parameters of the formation fluid of the cluster and the data of the formation fluid produced under different production pressure differentials.

[0054] 3. After the formation production test of a cluster segment is completed, the first packer 3, the second packer 4 and the third packer 7 are released and the tubing 1 is pulled upwards. This moves the production measurement and fracturing control valve 5 and the water hammer wave monitor 6 of the horizontal section to the perforation position of the adjacent cluster segment. The first packer 3, the second packer 4 and the third packer 7 are then re-sealed. The power fluid is injected again for pumping. The temperature, pressure and flow rate parameters of the formation production fluid of the second cluster segment are monitored and recorded. This step-by-step operation is repeated to achieve segmented production measurement of all perforated and fracturing cluster segments downhole until the measurement is completed.

[0055] Fourth, the fishing device 11 is then dropped into tubing 1 at the surface wellhead. The fishing device 11 moves downward until it sits on top of the storage-type downhole jet pump production measurement pump core 10 and grabs the fishing head 10.1. Then, the power fluid is injected downward along the annulus of tubing 1 and casing 9 at the surface wellhead. After the pressure of the power fluid is greater than the pressure of spring 2.8, the switch valve 2.7 moves downward to open the power fluid inlet 2.6. The power fluid enters the nozzle 2.5 through the opened power fluid inlet 2.6 and is accelerated and ejected. The extracted formation production fluid and the power fluid mix and push the cup 11.2 on the upper side of the fishing device 11 upward, thereby lifting the fishing device 11 and the storage-type downhole jet pump production measurement pump core 10 together to the surface. The test data of the storage-type downhole jet pump production measurement pump core 10 is read and sorted on the surface, and the data is compared and analyzed to determine the parts, locations and fracturing construction parameters that need to be selected for further fracturing.

[0056] 5. Unseal the first packer 3, the second packer 4, and the third packer 7. Drag tubing 1 to drive the production measurement and fracturing control valve 5 and the water hammer wave monitor 6 in the horizontal section, so that the production measurement and fracturing control valve 5 is directly facing the cluster section that needs fracturing. Then set the first packer 3, the second packer 4, and the third packer 7. Inject fracturing fluid into tubing 1 at the surface wellhead. The fracturing fluid passes through the central cavity 2.10 of the multi-nozzle pressure-controlled switch jet pump 2 along tubing 1. At this time, the power fluid inlet 2.6 is closed. The fracturing fluid continues to flow down to the production measurement and fracturing control valve 5 in the horizontal section, and into the slide valve 5. Under the action of 3, the formation fluid inlet 5.4 is in a closed state. When the pressure of the fracturing fluid is greater than the shear force of the shear pin 5.5, the sliding sleeve 5.6 falls down to the lower retaining ring 5.8, opening the fracturing fluid outlet 5.7, so that the fracturing fluid can be smoothly ejected through the fracturing fluid outlet 5.7 to further fracturing the fracture of the cluster segment. When fracturing is completed, the water hammer wave monitoring instrument 6 records the water hammer wave information data when the fracturing pump is stopped, and stores the monitoring data for analysis and evaluation of the formation fracturing and production capacity of the cluster segment. By repeatedly dragging the tubing 1, the re-fracturing construction and transformation of different cluster segments can be completed.

[0057] Example 2: The horizontal well clustered pumping, production measurement, and fracturing integrated device mentioned in this invention includes tubing 1, a multi-nozzle pressure-controlled switch jet pump 2, a first packer 3, a second packer 4, a production measurement and fracturing control valve 5, a water hammer wave monitor 6, a third packer 7, a plug 8, and a storage-type downhole jet pump production measurement pump core 10. The multi-nozzle pressure-controlled switch jet pump 2 and the first packer 3 are connected to the tubing 1 and lowered into the casing 9 in the well. The multi-nozzle pressure-controlled switch jet pump 2 and the first packer... 3 is located at the lower part of the vertical section; in the horizontal section, the second packer 4, the production measurement and fracturing control valve 5, the water hammer wave monitor 6 and the third packer 7 are connected through the oil pipe 1. The production measurement and fracturing control valve 5 and the water hammer wave monitor 6 are located between the second packer 4 and the third packer 7. A plug 8 is installed at the bottom end of the oil pipe 1. During segmented measurement, the storage-type downhole jet pump production measurement pump core 10 is inserted along the oil pipe 1, so that the storage-type downhole jet pump production measurement pump core 10 sits in the multi-nozzle pressure-controlled switch jet pump 2.

[0058] The difference from Example 1 is:

[0059] In this embodiment, the elastic claws 11.4 on the retrieval device 11 are arranged in 3-6 sets and form a cylindrical structure. The outer diameter of the cylindrical structure is smaller than the inner diameter of the retrieval device cylinder 11.1, and the lower end of the elastic claws 11.4 is smaller than the inner diameter of the opening of the guide limiting head 11.6. The outer diameter of the movable support body 11.5 is smaller than the inner diameter of the inner wall of the retrieval device cylinder 11.1.

[0060] The above description is merely a partial preferred embodiment of the present invention. Any person skilled in the art can modify the above-described technical solutions or modify them into equivalent technical solutions. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A horizontal well cluster-section pumping, production measurement, and fracturing integrated device, comprising tubing (1), characterized in that: It also includes a multi-nozzle pressure-controlled switch jet pump (2), a first packer (3), a second packer (4), a production measurement and fracturing control valve (5), a water hammer wave monitor (6), a third packer (7), a plug (8), and a storage-type downhole jet pump production measurement pump core (10). The multi-nozzle pressure-controlled switch jet pump (2) and the first packer (3) are connected to the casing (9) in the well via tubing (1), and the multi-nozzle pressure-controlled switch jet pump (2) and the first packer (3) are located in the lower part of the vertical section; in the horizontal section, they are connected to the casing (9) via tubing. (1) Connect the second packer (4), the production measurement and fracturing control valve (5), the water hammer wave monitor (6) and the third packer (7). The production measurement and fracturing control valve (5) and the water hammer wave monitor (6) are located between the second packer (4) and the third packer (7). Install the plug (8) at the bottom of the tubing (1). During segmented measurement, put the storage-type downhole jet pump production measurement pump core (10) along the tubing (1) so that the storage-type downhole jet pump production measurement pump core (10) sits in the multi-nozzle pressure-controlled switch jet pump (2). The production measurement and fracturing control valve (5) includes a control valve assembly (5.1), a control valve spring (5.2), a slide valve (5.3), a formation fluid inlet (5.4), a shear pin (5.5), a sliding sleeve (5.6), a fracturing fluid outlet (5.7), a lower retaining ring (5.8), a lower control valve connector (5.9), an upper control valve connector (5.10), and a spring retainer (5.11). The upper end of the control valve assembly (5.1) is provided with the upper control valve connector (5.10), and the lower end is provided with the lower control valve connector (5.9). The upper inner cavity of the control valve assembly (5.1) is sequentially equipped with the spring retainer (5.11), the control valve spring, and the slide valve spring. Spring (5.2) and slide valve (5.3) are connected to the formation fluid inlet (5.4) on the outer wall of the control valve assembly (5.1) via slide valve (5.3) to achieve switching. A sliding sleeve (5.6) is installed in the lower middle cavity of the control valve assembly (5.1), and the sliding sleeve (5.6) is installed on the inner wall of the control valve assembly (5.1) via shear pin (5.5) and closes the fracturing fluid outlet (5.7) on the outer wall of the control valve assembly (5.1). A lower retaining ring (5.8) is installed on the lower inner wall of the control valve assembly (5.1) to receive the sliding sleeve (5.6) that is sheared off from above, so as to open the fracturing fluid outlet (5.7).

2. The integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 1, characterized in that: The multi-nozzle pressure-controlled switch jet pump (2) includes a pump barrel (2.1), a diffuser chamber (2.2), a mixing chamber (2.3), a negative pressure chamber (2.4), a nozzle (2.5), a power fluid inlet (2.6), a switching valve (2.7), a spring (2.8), a lower connector (2.9), and a central cavity (2.10). The pump barrel (2.1) has a central cavity (2.10) at its center. Multiple nozzles consisting of a diffuser chamber (2.2), a mixing chamber (2.3), a negative pressure chamber (2.4), a nozzle (2.5), a power fluid inlet (2.6), a switching valve (2.7), a spring (2.8), a lower connector (2.9), and a central cavity (2.10) are located in the upper middle part of the pump barrel (2.1). The jet injection unit is composed of the combined chamber (2.3), the negative pressure chamber (2.4) and the nozzle (2.5) connected in sequence. Multiple power fluid inlets (2.6) are provided on the lower outer wall of the pump barrel (2.1). A lower connector (2.9) is installed at the bottom end of the pump barrel (2.1). A switch valve (2.7) is installed at the lower inlet end of the nozzle (2.5). The switch valve (2.7) is located inside the power fluid inlet (2.6). A spring (2.8) is installed at the lower end of the switch valve (2.7).

3. The integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 2, characterized in that: The storage-type downhole jet pump production measurement pump core (10) includes a retrieval head (10.1), a pump core body (10.2), a battery (10.3), a memory housing (10.4), and a combined sensor (10.5). The retrieval head (10.1) is installed at the upper end of the pump core body (10.2), and the memory housing (10.4) is installed at the lower end. The battery (10.3) is installed in the inner cavity of the pump core body (10.2), and the memory is installed in the inner cavity of the memory housing (10.4). The combined sensor (10.5) is installed at the lower end of the memory housing (10.4).

4. The integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 3, characterized in that: The outer diameter of the pump core body (10.2) is larger than the outer diameter of the memory housing (10.4), and the outer diameter of the memory housing (10.4) is larger than the outer diameter of the combined sensor (10.5). When pumping liquid for production measurement, the storage-type downhole jet pump production measurement pump core (10) is put into the pump. The lower end of the pump core body (10.2) is in contact with the upper end of the central cavity (2.10) of the pump barrel (2.1), so that the storage-type downhole jet pump production measurement pump core (10) sits in the multi-nozzle pressure-controlled switch jet pump (2) to measure data and store it in the memory.

5. The integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 4, characterized in that: The outer diameter of the middle part of the control valve assembly (5.1) is smaller than the outer diameter of both ends. The outer wall of the sliding sleeve (5.6) is provided with multiple sealing rings for contacting and cooperating with the inner wall of the control valve assembly (5.1) on the upper and lower sides of the fracturing fluid outlet (5.7). The lower end of the sliding sleeve (5.6) is a cylindrical plug (5.6.1) for cooperating and connecting with the lower retaining ring (5.8).

6. The integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 5, characterized in that: The water hammer wave monitor (6) includes a monitor housing assembly (6.1), a pressure sensor module (6.2), a data storage module (6.3), a battery module (6.4), a monitoring hole (6.5), an upper connector (6.6), and a lower connector (6.7). The upper connector (6.6) is provided at the upper end of the monitor housing assembly (6.1), and the lower connector (6.7) is provided at the lower end. The pressure sensor module (6.2), the data storage module (6.3), and the battery module (6.4) are installed in the inner cavity of the monitor housing assembly (6.1). Multiple monitoring holes (6.5) are provided on the outer wall of the monitor housing assembly (6.1) and are connected to the pressure sensor module (6.2) in the inner cavity of the monitor housing assembly (6.1). The data storage module (6.3) and the battery module (6.4) are installed separately from the pressure sensor module (6.2).

7. The integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 6, characterized in that: The storage-type downhole jet pump core (10) is retrieved to the surface wellhead by a retrieval device (11). The retrieval device (11) includes a retrieval device cylinder (11.1), a cup (11.2), a retrieval device spring (11.3), an elastic claw (11.4), a movable support body (11.5), and a guide limiting head (11.6). The guide limiting head (11.6) is provided at the lower end of the retrieval device cylinder (11.1), and a cup fixing body (11.7) is installed at the upper end of the retrieval device cylinder (11.1). The outer wall of the cup fixing body (11.7) is fitted with... A leather cup (11.2) is installed; a retrieval spring (11.3), a movable support body (11.5), and an elastic claw (11.4) are installed in the inner cavity of the retrieval cylinder (11.1). The retrieval spring (11.3) is installed between the upper part of the movable support body (11.5) and the lower end of the leather cup fixing body (11.7). Multiple elastic claws (11.4) are connected to the lower end of the movable support body (11.5). The lower end of each elastic claw (11.4) extends inward to grab the retrieval head (10.1) of the storage-type downhole jet pump production measurement pump core (10).

8. The integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 7, characterized in that: The elastic claws (11.4) are arranged in 3-6 groups and form a cylindrical structure; the outer diameter of the movable support (11.5) is smaller than the inner diameter of the inner wall of the retrieval device cylinder (11.1).

9. The method of using the integrated horizontal well cluster-stage pumping, production measurement, and fracturing device according to claim 8, characterized in that: The process includes the following:

1. Connect the multi-nozzle pressure-controlled switch jet pump (2), first packer (3), second packer (4), production measurement and fracturing control valve (5), water hammer wave monitor (6) and third packer (7) through the tubing (1), and run them down into the well along the casing (9). Send the second packer (4), production measurement and fracturing control valve (5), water hammer wave monitor (6) and third packer (7) into the horizontal section, and then set the first packer (3), second packer (4) and third packer (7).

2. During the production measurement process, a storage-type downhole jet pump core (10) is inserted into the tubing (1) at the surface wellhead. The storage-type downhole jet pump core (10) descends along the tubing (1) to the upper end of the multi-nozzle pressure-controlled switch jet pump (2) and sits on the upper end of the central cavity (2.10) of the pump barrel (2.1). The combined sensor (10.5) is inserted into the central cavity (2.10). Then, at the surface wellhead, power fluid is injected downwards along the annulus of the tubing (1) and casing (9). After the pressure of the power fluid exceeds the pressure of the spring (2.8), the switch valve (2.7) moves downwards to open the power fluid inlet (2.6). The power fluid flows down through the opened power fluid inlet (2.6). The fluid enters and exits from the nozzle (2.5), thereby driving the formation fluid of the corresponding cluster between the second packer (4) and the third packer (7) to enter the inner cavity of the tubing (1) through the formation fluid inlet (5.4) of the production measurement and fracturing control valve (5), and then enters the negative pressure chamber (2.4) through the central chamber (2.10) of the multi-nozzle pressure-controlled switch jet pump (2). After mixing with the power fluid, it passes through the mixing chamber (2.3) and the diffusion chamber (2.2) and is discharged upward along the tubing (1) to the surface. The combined sensor (10.5) of the storage-type downhole jet pump production measurement pump core (10) obtains and stores the temperature, pressure, flow rate parameters of the formation fluid of the cluster and the data of the formation fluid produced under different production pressure differentials.

3. After the formation production test of a cluster segment is completed, the first packer (3), the second packer (4) and the third packer (7) are unsealed and the tubing (1) is pulled upwards. This drives the production measurement and fracturing control valve (5) and the water hammer wave monitor (6) of the horizontal section to the perforation position of the adjacent cluster segment. The first packer (3), the second packer (4) and the third packer (7) are then resealed. The power fluid is injected again to pump the fluid. The temperature, pressure and flow rate parameters of the formation production of the second cluster segment are monitored and recorded. This step-by-step operation is repeated to achieve segmented production measurement of all perforated fracturing cluster segments downhole until the measurement is completed. Fourth, then, at the surface wellhead, the fishing device (11) is dropped into the tubing (1). The fishing device (11) moves downward until it sits on the top of the storage-type downhole jet pump core (10) and grabs the fishing head (10.1). Then, at the surface wellhead, the power fluid is injected downward along the annulus of the tubing (1) and casing (9). After the pressure of the power fluid is greater than the pressure of the spring (2.8), the switch valve (2.7) moves downward to open the power fluid inlet (2.6). The power fluid flows along the opened valve. The hydraulic fluid inlet (2.6) enters the nozzle (2.5) and is accelerated for injection. The extracted formation production fluid and the hydraulic fluid are mixed and then push the upper cup (11.2) of the fishing device (11) upward, thereby lifting the fishing device (11) and the storage-type downhole jet pump production measurement pump core (10) to the surface. The test data of the storage-type downhole jet pump production measurement pump core (10) are read and sorted on the surface, and the data are compared and analyzed to determine the part, location and fracturing construction parameters that need to be selected for re-fracturing.

5. Unseal the first packer (3), the second packer (4), and the third packer (7), drag the tubing (1) to drive the production measurement and fracturing control valve (5) and the water hammer wave monitor (6) of the horizontal section, so that the production measurement and fracturing control valve (5) is facing the cluster section that needs to be fractured and modified. Then set the first packer (3), the second packer (4), and the third packer (7), and inject fracturing fluid into the tubing (1) at the wellhead on the surface. The fracturing fluid passes through the central cavity (2.10) of the multi-nozzle pressure-controlled switch jet pump (2) along the tubing (1). At this time, the power fluid inlet (2.6) is closed, and the fracturing fluid continues to flow down to the production measurement and fracturing control valve (5) of the horizontal section. Under the action of the sliding valve (5.3), the formation fluid inlet (5.4) is closed. When the pressure of the fracturing fluid is greater than the shear force of the shear pin (5.5), the sliding sleeve (5.6) falls down to the lower retaining ring (5.8), which opens the fracturing fluid outlet (5.7), allowing the fracturing fluid to be ejected smoothly through the fracturing fluid outlet (5.7) to further fracture the fractures in the cluster. When fracturing is completed, the water hammer wave monitoring instrument (6) records the water hammer wave information data when the pump is stopped during fracturing and stores the monitoring data for analysis and evaluation of the formation fracturing and production capacity of the cluster. By repeatedly dragging the tubing (1), the re-fracturing construction of different clusters can be completed.

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