Underground dynamic parameter continuous monitoring system and method and application

Abstract

The invention discloses an underground dynamic parameter continuous monitoring system and method and application. The system comprises a well casing hanging short section, an underground monitoring device, a reading butt joint device and a ground data processor, the well casing hanging short section can be connected with an oil pipe, and a center channel and a plurality of bypass channels distributed around the center channel are arranged in the well casing hanging short section. The underground monitoring device can be hung on the central channel, and the bypass channel is suitable for fluid to pass; the underground monitoring device comprises a data acquisition module and a wireless signal transmitting module, and the data acquisition module is used for monitoring underground parameters in the oil pipe in real time; the wireless signal transmitting module is used for transmitting underground parameters; the reading butt joint device can be tripped into an oil pipe and can receive underground parameters sent by the wireless signal transmitting module in the state that the reading butt joint device is located in the signal radiation range of the signal transmitting module; according to the system, continuous monitoring can be guaranteed, the convenience of monitoring data acquisition is improved, and the corrosion condition of the underground pipe string under the complex working condition is truly reflected.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas well monitoring, and in particular to a downhole dynamic parameter continuous monitoring system, method and application. Background Art

[0002] The dynamically changing parameters of oil wells used in oil field development, such as pressure, flow, temperature, corrosion rate, etc. under real working conditions are first-hand information that developers must master in order to understand reservoirs, improve technology, adjust plans, etc. Real-time continuous monitoring has also become an important research topic for engineering and technical personnel in recent years.

[0003] During the oil and gas production process, well management personnel need to master the various logging parameters in the oil and gas wells in real time, and make production improvements and oil and gas production safety analysis based on accurate logging parameters, so as to carry out reasonable dynamic production management of oil and gas reservoirs and realize scientific and efficient development of oil and gas reservoirs. Due to the limitations of high temperature, strong vibration, large amount of data, small mechanical space and other factors, the continuous acquisition and storage of downhole dynamic signals has always been a difficult point in the design of drilling instruments. High-speed data acquisition and storage in real time have put forward higher technical requirements for the monitoring system. Summary of the invention

[0004] In order to enrich the product types of downhole dynamic parameter monitoring devices and increase the selection space of downhole dynamic parameter monitoring methods, an embodiment of the present invention provides a downhole dynamic parameter continuous monitoring system, method and application.

[0005] In a first aspect, an embodiment of the present invention provides a downhole dynamic parameter continuous monitoring system, including a well pipe suspension nipple, a downhole monitoring device, a reading docking device, and a ground data processor;

[0006] The well pipe suspension nipple can be connected to the oil pipe, and the well pipe suspension nipple is provided with a central channel and a plurality of side channels distributed around the central channel;

[0007] The downhole monitoring device can be suspended from the central channel, and the plurality of side channels are suitable for passing fluid;

[0008] The downhole monitoring device comprises a data acquisition module and a wireless signal transmission module, wherein the data acquisition module is used to monitor downhole parameters in the oil pipe in real time;

[0009] The wireless signal transmission module is used to send downhole parameters;

[0010] The reading docking device can be lowered into the oil pipe. When the reading docking device is within the signal radiation range of the signal transmitting module, it can receive the downhole parameters sent by the wireless signal transmitting module.

[0011] The reading docking device is electrically connected to the ground data processor.

[0012] In one or some optional embodiments, the downhole monitoring device includes a variable diameter holder;

[0013] The reducer is funnel-shaped, and a funnel-shaped guide groove is provided on the upper part of the central channel. The reducer can be clamped in the guide groove to suspend the downhole monitoring device on the central channel.

[0014] The wireless signal transmitting module is placed in the variable diameter holder.

[0015] In one or some optional embodiments, a bailing head is provided on the top of the downhole monitoring device;

[0016] The fishing head can cooperate with the fishing device and the launching device to lower the downhole monitoring device into the oil pipe and take it out from the oil pipe.

[0017] In one or some optional embodiments, the downhole monitoring device further comprises a measurement storage module, and the data acquisition module comprises a corrosion measurement probe and a probe;

[0018] A shell is provided at the bottom of the downhole monitoring device, and the corrosion measurement probe and the probe are arranged in the shell;

[0019] The housing is provided with a hollow flow passage so that the probe can contact the fluid in the oil pipe;

[0020] The corrosion measuring probe is connected to the probe and the measuring storage module respectively, the probe can monitor the corrosion degree of the downhole oil pipe, and the corrosion measuring probe can transmit the corrosion measurement data measured by the probe to the measuring storage module;

[0021] The measurement storage module is capable of storing corrosion measurement data.

[0022] In one or some optional embodiments, the data acquisition module further includes a temperature monitoring module;

[0023] The temperature monitoring module is used to monitor the downhole temperature;

[0024] The temperature monitoring module is connected to the measurement and storage module, and the measurement and storage module can store temperature monitoring data.

[0025] In one or some optional embodiments, the data acquisition module further includes a pressure monitoring module;

[0026] The pressure monitoring module is used to monitor downhole pressure;

[0027] The pressure monitoring module is connected to the measurement storage module, and the measurement storage module can store pressure monitoring data.

[0028] In one or some optional embodiments, the wireless signal transmission module is connected to the measurement storage module;

[0029] The wireless signal transmission module can transmit the corrosion measurement data, temperature monitoring data and pressure monitoring data stored in the measurement storage module to the reading docking device.

[0030] In one or some optional embodiments, the downhole monitoring device further includes a power supply module;

[0031] The power supply module is connected to the measurement storage module and the data acquisition module respectively, and is suitable for supplying power to the measurement storage module and the data acquisition module.

[0032] In one or some optional embodiments, the downhole monitoring device further includes a first cylinder, a second cylinder, a third cylinder and a connecting body;

[0033] The first cylinder, the connecting body, the second cylinder, the third cylinder and the shell are connected in sequence;

[0034] The power supply module is placed in the first cylinder;

[0035] The measurement storage module is placed in the second cylinder;

[0036] The temperature monitoring module and the pressure monitoring module are arranged in the third cylinder.

[0037] In one or some optional embodiments, the bottom of the housing is conical;

[0038] The flow passage is in the shape of a long hole.

[0039] In one or some optional embodiments, an upper joint is provided at the upper end of the well pipe suspension short section, and a lower joint is provided at the lower end.

[0040] In a second aspect, an embodiment of the present invention provides a method for continuous monitoring of downhole dynamic parameters, using the downhole continuous monitoring system for dynamic parameters described in the first aspect, comprising:

[0041] Connecting the well pipe suspension nipple to the oil pipe and lowering it into the well along with the oil pipe;

[0042] Lowering the downhole monitoring device into the oil pipe and hanging it in the central channel of the well pipe hanging nipple;

[0043] Real-time monitoring of downhole parameters in downhole oil pipes through downhole monitoring devices;

[0044] Lowering the reading docking device into the oil pipe until the reading docking device is within the signal radiation range of the wireless signal transmitting module, so as to trigger the wireless signal transmitting module and transmit the downhole parameters monitored by the downhole monitoring device to the reading docking device;

[0045] The received downhole parameters are transmitted to the surface data processor through the reading interface.

[0046] In a third aspect, an embodiment of the present invention provides an application of the downhole dynamic parameter continuous monitoring system described in the first aspect in downhole dynamic parameter continuous monitoring.

[0047] The beneficial effects of the above technical solution provided in the embodiments of the present invention include at least:

[0048] In the downhole dynamic parameter continuous monitoring system provided in the embodiment of the present invention, the downhole monitoring device can be suspended in the well pipe suspension short section for a long time, and the downhole parameters such as temperature, pressure and corrosion condition in the downhole oil pipe can be monitored in real time for a long time. By placing the reading dock close to the wireless signal transmission module, the monitored downhole parameters can be transmitted to the reading dock, so as to realize the wireless transmission of the monitoring data, so that the process of acquiring the monitoring data does not need to move the downhole monitoring device, which ensures continuous monitoring and improves the operational convenience of acquiring the monitoring data, so that the temperature, pressure and corrosion parameters of a certain time period in the well can be easily obtained, and the corrosion condition of the downhole pipe string in a complex working environment can be truly reflected, which is conducive to providing a research basis for the dynamic production management of oil and gas reservoirs and the scientific and efficient development of oil and gas reservoirs; compared with the downhole dynamic monitoring equipment that requires long-term cable suspension and needs to obtain monitoring data with the oil pipe, the workload is greatly reduced and a lot of working time is saved.

[0049] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0050] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0052] Figure 1 It is a structural schematic diagram of a downhole dynamic parameter continuous monitoring system provided in an embodiment of the present invention;

[0053] Figure 2It is a structural schematic diagram of a well pipe suspension short section provided in an embodiment of the present invention;

[0054] Figure 3 It is a cross-sectional schematic diagram of a well pipe suspension short section provided in an embodiment of the present invention;

[0055] Figure 4 It is a structural schematic diagram of a downhole monitoring device provided in an embodiment of the present invention;

[0056] Figure 5 The figure is a flow chart of the method for continuous monitoring of downhole dynamic parameters provided in an embodiment of the present invention.

[0057] In the figure:

[0058] 1 is a well pipe suspension nipple, 11 is a center channel, 111 is a guide groove, 12 is a side channel, 13 is a main body, 14 is an upper joint, and 15 is a lower joint;

[0059] 2 is a downhole monitoring device, 21 is a wireless signal transmission module, 22 is a casting head, 23 is a reducer, 24 is a power supply module, 25 is a measurement storage module, 261 is a temperature monitoring module, 262 is a pressure monitoring module, 263 is a probe, 264 is a corrosion measurement probe, 271 is a first cylinder, 272 is a connector, 273 is a second cylinder, 274 is a third cylinder, 275 is a shell, 2751 is a flow passage, and 276 is a wire passing structure;

[0060] 3 is a reading docking device;

[0061] 4 is a ground data processor;

[0062] 5 is a sieve tube;

[0063] 6 is a wire plug;

[0064] 7 is an oil pipe;

[0065] 8 is the wellbore casing. DETAILED DESCRIPTION

[0066] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0067] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "far", "near", "front", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0068] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] The inventors have found that most of the existing downhole monitoring equipment can only be lowered into the well for measurement and recording at regular intervals and at fixed points. Due to the limitations of the ground, wellbore, oil reservoir and other conditions, only the injection parameter data at the time of measurement can be obtained, and it is impossible to carry out continuous real-time monitoring over a long period of time, and it is impossible to obtain real-time and continuous monitoring data changes. It is difficult to timely understand the injection or formation changes of the injection well at a certain time stage. At the same time, downhole instrument testing is affected by the injection fluid pressure, corrosion and scaling, sand production, well site roads, etc., and the instrument often fails to be lowered, encounters obstructions or gets stuck, etc., which has great technical limitations and increases the labor intensity of construction personnel to a certain extent.

[0070] Based on this, an embodiment of the present invention provides a system, method and application for continuous monitoring of downhole dynamic parameters, which are described in detail below through specific embodiments.

[0071] Embodiment 1

[0072] The embodiment of the present invention provides a system for continuous monitoring of downhole dynamic parameters. Figure 1-Figure 4 As shown, it includes a well pipe suspension short section 1, a downhole monitoring device 2, a reading docking device 3 and a ground data processor 4;

[0073] The well pipe suspension nipple 1 can be connected to the oil pipe 7, and a central channel 11 and a plurality of side channels 12 distributed around the central channel 11 are arranged in the well pipe suspension nipple 1;

[0074] The downhole monitoring device 2 can be suspended from the central channel 11, and the plurality of side channels 12 are suitable for passing fluid;

[0075] The downhole monitoring device 2 includes a data acquisition module and a wireless signal transmission module 21, wherein the data acquisition module is used to monitor downhole parameters in the oil pipe 7 in real time;

[0076] A wireless signal transmission module 21, used for transmitting downhole parameters;

[0077] The reading docking device 3 can be lowered into the oil pipe 7. When the reading docking device 3 is within the signal radiation range of the signal transmitting module, it can receive the downhole parameters sent by the wireless signal transmitting module 21.

[0078] The reading docking device 3 is electrically connected to the ground data processor 4 .

[0079] In the embodiment of the present invention, refer to Figure 1-Figure 4 As shown, the well pipe suspension sub 1 includes a main body 13 and an upper joint 14 and a lower joint 15 respectively arranged at the upper and lower ends of the main body 13. The upper joint 14 and the lower joint 15 can be connected to the oil pipe 7 and the relevant parts of the oil pipe 7, so that the well pipe suspension sub 1 can be installed between the oil pipes 7, and can be lowered into any position of the wellbore with the oil pipe 7. The downhole monitoring device 2 can be lowered into the oil pipe 7 through the launcher, and after reaching the well pipe suspension sub 1, it is suspended in the central channel 11 to monitor the downhole parameters in real time; when the downhole monitoring device 2 is suspended in the central channel 11, the fluid flows in multiple side channels 12 to keep the oil pipe 7 connected from top to bottom, so as not to affect the normal production of the oil and gas well.

[0080] In an embodiment of the present invention, the wireless signal transmitting module 21 can be a signal transmitting antenna, which is arranged on the upper part of the downhole monitoring device 2. When the downhole monitoring device 2 is suspended on the central channel 11, the wireless signal transmitting module 21 can be located at the top of the central channel 11, so that after the reading docking device 3 is lowered into the oil pipe 7, it can reach the signal radiation range of the signal transmitting module, thereby enabling smooth data transmission of downhole parameters.

[0081] In a specific embodiment, referring to Figure 1-Figure 4 As shown, the downhole monitoring device 2 also includes a dredging head 22 and a reducer 23 arranged up and down. The dredging head 22 is arranged at the top of the downhole monitoring device 2, so as to cooperate with the launcher and the salvage device to lower the downhole monitoring device 2 into or pull out the oil pipe 7. The reducer 23 is funnel-shaped, and a funnel-shaped guide groove 111 is arranged at the upper part of the central channel 11. The reducer 23 can be stuck in the guide groove 111. After the downhole monitoring device 2 is lowered into the oil pipe 7, the reducer 23 can automatically be stuck in the guide groove 111 at the upper part of the central channel 11 to suspend the downhole monitoring device 2 in the central channel 11, so as to realize the connection between the downhole monitoring device 2 and the well pipe suspension short section 1. The reducer 23 is sealed inside, and the wireless signal transmitting module 21 is placed in the reducer 23 to prevent the fluid passing through the oil pipe 7 from damaging the wireless signal transmitting module 21.

[0082] In a specific embodiment, referring to Figure 3 As shown, the downhole monitoring device 2 also includes a first cylinder 271 and a power supply module 24. The power supply module 24 is respectively connected to the data acquisition module and the wireless signal transmission module 21, and can supply power to the data acquisition module and the wireless signal transmission module 21. The first cylinder 271 is sealed and connected to the reducer 23, and the power supply module 24 is installed in the first cylinder 271.

[0083] In a specific embodiment, referring to Figure 3 As shown, the downhole monitoring device 2 also includes a second cylinder 273 and a measurement storage module 25. The measurement storage module 25 is connected to the data acquisition module, and the downhole parameters monitored and collected by the data acquisition module can be stored in the measurement storage module 25; and the measurement storage module 25 is also connected to the wireless signal transmission module 21, and the downhole parameter results stored in the measurement storage module 25 are transmitted to the reading docking device 3 through the wireless signal transmission module 21. The second cylinder 273 is sealed and connected to the first cylinder 271, and the measurement storage module 25 is installed in the second cylinder 273.

[0084] In a specific embodiment, referring to Figure 3 As shown, the downhole monitoring device 2 also includes a third cylinder 274, which is sealed and connected to the second cylinder 273. The data acquisition module includes a pressure monitoring module 262 and a temperature monitoring module 261, which are installed in the third cylinder 274. The temperature monitoring module 261 is used to monitor the downhole temperature, and is respectively connected to the power supply module 24 and the measurement and storage module 25. The measurement and storage module 25 can store the temperature monitoring data measured by the temperature monitoring module 261, and the power supply module 24 can supply power to the temperature monitoring module 261. The pressure monitoring module 262 is used to monitor the downhole pressure, and is respectively connected to the power supply module 24 and the measurement and storage module 25. The measurement and storage module 25 can store the pressure monitoring data measured by the pressure monitoring module 262, and the power supply module 24 can supply power to the pressure monitoring module 262.

[0085] In a specific embodiment, referring to Figure 1 and Figure 3As shown, the downhole monitoring device 2 also includes a shell 275, which is arranged at the bottom of the downhole monitoring device 2 and connected to the third cylinder 274. The data acquisition module also includes a corrosion monitoring module, which is used to monitor the corrosion situation downhole. The corrosion monitoring module includes a corrosion measurement probe 264 and a probe 263 arranged in the shell 275 from top to bottom. The probe 263 is a slender rod-shaped inductive probe, which is parallel to the inner wall of the oil pipe 7 in the axial direction and is made of the same material as the oil pipe 7. It can accurately simulate the flushing effect of the injected fluid on the oil pipe 7, thereby monitoring the corrosion parameters downhole, and then the corrosion situation of the oil pipe 7 can be judged by the corrosion parameters measured by the probe 263. The corrosion measurement probe 264 is connected to the probe 263 and the measurement storage module 25 respectively, and can transmit the corrosion parameters measured by the probe 263 to the measurement storage module 25, and the measurement storage module 25 stores the corrosion parameters. The probe 263 is provided with temperature compensation, and the ambient temperature change will not affect the measurement result. If the calibration measurement is accurate under normal temperature and pressure, the measurement is still accurate under the high temperature and high pressure environment underground. The temperature compensation setting method of the probe 263 is well known to those skilled in the art, and can be referred to the detailed record in the prior art, and will not be repeated here.

[0086] In the embodiment of the present invention, refer to Figure 1 and Figure 3 As shown, the probe 263 and the corrosion measuring probe 264 are fixed in the housing 275. The housing 275 is a conical stainless steel structure, which can prevent the probe 263 and the corrosion measuring probe 264 from being damaged by collision during downhole work. Its conical structure makes it easy to adjust the center and reduce resistance when the downhole monitoring device 2 is lowered into the oil pipe 7, which is conducive to downhole operations. A hollow flow passage 2751 is set on the side of the housing 275 so that the probe 263 can contact the fluid in the oil pipe 7; the flow passage 2751 is set in a symmetrical long hole shape to ensure that the fluid in the oil pipe 7 can flow smoothly, so as to better simulate the actual situation of the oil pipe 7 being flushed, so that the data results of the corrosion measurement are more accurate.

[0087] In a specific embodiment, referring to Figure 3As shown, the downhole monitoring device 2 also includes a connector 272, a bailing head 22, a reducer 23, a first cylinder 271, a connector 272, a second cylinder 273, a third cylinder 274 and a housing 275 are sequentially connected up and down, and the reducer 23, the first cylinder 271, the connector 272, the second cylinder 273 and the third cylinder 274 are sealed inside to prevent the fluid in the oil pipe 7 from entering therein and damaging the wireless signal transmission module 21, the power supply module 24, the temperature monitoring module 261, the pressure monitoring module 262 and the measurement storage module 25. The reducer 23, the first cylinder 271, the connector 272, the second cylinder 273 and the third cylinder 274 are all provided with a wire structure 276 so that the internal modules can be connected by wires to realize power supply and data transmission between the modules.

[0088] In the embodiment of the present invention, according to different actual conditions, the method of lowering the downhole monitoring device 2 into the oil pipe 7 can be reasonably selected: when the oil pipe 7 has not yet been lowered into the wellbore, the downhole monitoring device 2 can be placed in the central channel 11 of the well pipe suspension short section 1, and then lowered into the wellbore together with the well pipe suspension short section 1 and the oil pipe 7, thereby saving the process of dropping, and better ensuring the accurate connection between the downhole monitoring device 2 and the well pipe suspension short section 1; when the well pipe suspension short section 1 has been lowered into the wellbore together with the oil pipe 7, the downhole monitoring device 2 can only be dropped into the central channel 11 of the well pipe suspension short section 1 through the dropper.

[0089] In the embodiment of the present invention, the deployment and salvage of the downhole monitoring device 2 do not require special launchers and salvage devices, and can be directly compatible with the measurement and adjustment linkage equipment used for water injection. The deployment and salvage of the downhole monitoring device 2 can be achieved by connecting with steel wires or cables; and the overall design of the downhole monitoring device 2 is a concentric structure with a conical bottom, which has a high success rate of deployment and salvage, thereby improving work efficiency; the data transmission method of the downhole monitoring device 2 is wireless transmission, which can avoid the need to raise and lower the pipe string during re-repair operations, and does not require long-term suspension of steel wires or cables, greatly reducing the economic cost of the project.

[0090] In the embodiment of the present invention, refer to Figure 1 and Figure 3 As shown, the reading docking device 3 is connected to the ground data processor 4 through a cable. When it is necessary to read the downhole parameters monitored by the downhole monitoring device 2 within a certain time period, the reading docking device 3 is lowered into the oil pipe 7 until it reaches the signal radiation range of the wireless signal transmitting module 21, and the wireless signal transmitting module 21 can be triggered to transmit the downhole parameters stored in the measurement storage module 25 to the reading docking device 3; the reading docking device 3 receives and transmits the monitored downhole parameters to the ground data processor 4, and the acquisition of the downhole parameters can be completed, so that the downhole monitoring device 2 can realize continuous monitoring and real-time direct reading, and can truly grasp the real-time and continuous dynamic changes in the well.

[0091] In the embodiment of the present invention, the temperature monitoring module 261, the pressure monitoring module 262, the probe 263 and the corrosion measurement probe 264 can perform corrosion monitoring in different fluid medium environments. Therefore, the downhole dynamic parameter continuous monitoring system provided by the embodiment of the present invention is suitable for water injection wells, polymer injection wells, gas injection wells, and oil wells with carbon dioxide throughput.

[0092] In the embodiment of the present invention, the specific process of using the downhole dynamic parameter continuous monitoring system to monitor the parameters in the downhole oil pipe 7 may include:

[0093] When repairing the injection well, refer to Figure 1 As shown, the upper joint 14 of the well pipe suspension short section 1 is connected to the oil pipe 7, the lower joint 15 is connected to the screen pipe 5, and the wire plug 6 is connected below the screen pipe 5, and then the well pipe suspension short section 1 is lowered into the well casing 8 along with the oil pipe 7 to the preset monitoring depth;

[0094] After the well is completed, the dredging head 22 on the upper part of the downhole monitoring device 2 is stuck in the conventional matching measuring and adjusting instrument, and is lowered into the oil pipe 7 together with the cable. When the downhole monitoring device 2 reaches 3-5 meters above the well section suspension short section, the ground data processor 4 sends instructions through the cable to start the measuring and adjusting instrument and make the dredging head 22 disengage from the measuring and adjusting instrument under the action of gravity and fluid, and the downhole monitoring device 2 falls freely and enters the central channel 11 of the well pipe suspension short section 1 under the protection and guidance of the conical shell 275 until the reducer 23 cooperates with the guide groove 111 on the upper part of the central channel 11 in the well pipe suspension short section 1, so as to realize the automatic placement and acceptance of the downhole monitoring device 2;

[0095] Furthermore, the injected fluid enters the wellbore from the oil pipe 7, flows through the well pipe suspension short section 1 through the bypass channel 12, then flows downward around the downhole monitoring device 2, fills the entire protective shell 275 through the flow channel 2751, and continues to flow downward into the formation, so that the probe 263 and the fluid are fully in contact; at the same time, the power supply module 24 provides sufficient power in real time, so that the probe 263 can continuously monitor the corrosion condition of the downhole oil pipe 7, and then transmits the monitored corrosion parameters to the measurement storage module through the corrosion measurement probe 264 according to the preset time node for storage; in addition, the pressure monitoring module 262 and the temperature monitoring module 261 also monitor the downhole pressure and temperature in real time, and transmit them to the measurement storage module for storage according to the preset time node;

[0096] Furthermore, data reading and downhole monitoring device 2 are transmitted wirelessly. Specifically, when downhole parameters need to be read, existing measurement and adjustment equipment is used, and a cable is used to connect the reading docking device 3 and slowly lower it into the oil pipe 7, so that the reading docking device 3 gradually approaches the wireless signal transmitting module 21 in the downhole monitoring device 2 in the well until it reaches the signal radiation range of the wireless signal transmitting module 21 (at this time, the distance between the wireless signal transmitting module 21 and the reading docking device 3 is the wireless transmission distance). The wireless signal transmitting module 21 is triggered to transmit the monitoring data in the measurement storage module to the reading docking device 3, and the data is displayed in the ground data processor 4 through the cable, thereby realizing the daily data collection of the downhole monitoring device 2;

[0097] Furthermore, when the downhole monitoring device 2 needs to be retrieved from the well, the existing measuring and adjusting equipment is used to slowly lower the connected salvage device into the oil pipe 7 using a cable (or steel wire), and lower it at a preset speed under the action of gravity and water flow, so that the salvage head 22 enters the hole of the salvage device and docks and locks, and then the cable (or steel wire) is pulled up to salvage the salvage device and the downhole monitoring device 2 together.

[0098] In the embodiment of the present invention, in the specific process of using the downhole dynamic parameter continuous monitoring system to monitor the parameters in the downhole oil pipe 7, the way to hang the downhole monitoring device 2 at the central channel 11 can also be: put the downhole monitoring device 2 into the central channel 11 of the well pipe suspension short section 1 in advance, so that the reducer 23 is received on the funnel-shaped guide groove 111 at the upper part of the central channel 11 of the well pipe suspension short section 1, connect the upper joint 14 of the well pipe suspension short section 1 to the oil pipe 7, connect the lower part to the screen pipe 5, and connect the wire plug 6 under the screen pipe 5, and then lower the well pipe suspension short section 1 together with the oil pipe 7 into the preset monitoring depth in the wellbore casing 8.

[0099] In the downhole dynamic parameter continuous monitoring system provided in the embodiment of the present invention, the downhole monitoring device 2 can be suspended in the well pipe suspension short section 1 for a long time, and the downhole parameters such as temperature, pressure and corrosion conditions in the downhole oil pipe 7 can be monitored in real time for a long time. By placing the reading docking device 3 close to the wireless signal transmission module 21, the monitored downhole parameters can be transmitted to the reading docking device 3, so as to realize the wireless transmission of the monitoring data, so that the process of acquiring the monitoring data does not need to move the downhole monitoring device 2, which ensures continuous monitoring and improves the operational convenience of acquiring the monitoring data, so that the temperature, pressure and corrosion parameters of a certain time period in the well can be obtained conveniently, and the corrosion conditions of the downhole pipe string in a complex working environment can be truly reflected, which is conducive to providing a research basis for the dynamic production management of oil and gas reservoirs and the scientific and efficient development of oil and gas reservoirs; compared with the downhole dynamic monitoring equipment that requires long-term cable suspension and needs to be lifted and lowered with the oil pipe 7 to obtain monitoring data, the workload is greatly reduced, a lot of working time is saved, and the downhole data monitoring accuracy, monitoring work efficiency and field operation safety are improved.

[0100] Embodiment 2

[0101] Based on the same inventive concept, the embodiment of the present invention also provides a method for continuous monitoring of downhole dynamic parameters, using the downhole dynamic parameter continuous monitoring system described in embodiment 1, referring to Figure 5 As shown, including:

[0102] S101: Connect the well pipe suspension nipple 1 to the oil pipe 7 and lower it into the well along with the oil pipe 7;

[0103] S102: lowering the downhole monitoring device 2 into the oil pipe 7 and hanging it in the central channel 11 of the well pipe hanging nipple 1;

[0104] S103: Real-time monitoring of downhole parameters in the downhole oil pipe 7 by the downhole monitoring device 2;

[0105] S104: lowering the reading docking device 3 into the oil pipe 7 until the reading docking device 3 is within the signal radiation range of the wireless signal transmitting module 21, so as to trigger the wireless signal transmitting module 21 and transmit the downhole parameters monitored by the downhole monitoring device 2 to the reading docking device 3;

[0106] S105: The received downhole parameters are transmitted to the surface data processor 4 via the reading docking device 3 .

[0107] In the embodiment of the present invention, in the embodiment of the present invention, the method for continuous monitoring of downhole dynamic parameters corresponds to the system for continuous monitoring of downhole dynamic parameters described in Example 1, and its specific implementation process can refer to the process of applying the downhole dynamic parameter continuous monitoring system in Example 1 to realize continuous monitoring of downhole dynamic parameters, and the repeated parts will not be repeated here.

[0108] Embodiment 3

[0109] Based on the same inventive concept, an embodiment of the present invention further provides an application of the downhole dynamic parameter continuous monitoring system described in Embodiment 1 in downhole dynamic parameter continuous monitoring.

[0110] In the embodiment of the present invention, the specific process of using the downhole dynamic parameter continuous monitoring system to realize the downhole dynamic parameter continuous monitoring can refer to the process of using the downhole dynamic parameter continuous monitoring system to realize the downhole dynamic parameter continuous monitoring in Example 1, and the repeated parts will not be repeated here.

[0111] Obviously, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. The present disclosure is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A downhole dynamic parameter continuous monitoring system, characterized in that: It includes a well pipe suspension nipple, a downhole monitoring device, a reading docking device and a ground data processor; The well pipe suspension nipple can be connected to the oil pipe, and the well pipe suspension nipple is provided with a central channel and a plurality of side channels distributed around the central channel; The downhole monitoring device can be suspended from the central channel, and the plurality of side channels are suitable for passing fluid; The downhole monitoring device comprises a data acquisition module and a wireless signal transmission module, wherein the data acquisition module is used to monitor downhole parameters in the oil pipe in real time; The wireless signal transmission module is used to send downhole parameters; The reading docking device can be lowered into the oil pipe. When the reading docking device is within the signal radiation range of the signal transmitting module, it can receive the downhole parameters sent by the wireless signal transmitting module. The reading docking device is electrically connected to the ground data processor.

2. The downhole dynamic parameter continuous monitoring system according to claim 1, characterized in that: The downhole monitoring device comprises a variable diameter holder; The reducer is funnel-shaped, and a funnel-shaped guide groove is provided at the upper portion of the central channel. The reducer can be clamped in the guide groove to suspend the downhole monitoring device on the central channel. The wireless signal transmitting module is placed in the variable diameter holder.

3. The downhole dynamic parameter continuous monitoring system according to claim 1, characterized in that: A bailing head is provided on the top of the downhole monitoring device; The fishing head can cooperate with the fishing device and the launching device to lower the downhole monitoring device into the oil pipe and take it out from the oil pipe.

4. The downhole dynamic parameter continuous monitoring system according to claim 1, characterized in that: The downhole monitoring device also includes a measurement storage module, and the data acquisition module includes a corrosion measurement probe and a probe; A shell is provided at the bottom of the downhole monitoring device, and the corrosion measurement probe and the probe are arranged in the shell; The housing is provided with a hollow flow passage so that the probe can contact the fluid in the oil pipe; The corrosion measuring probe is connected to the probe and the measuring storage module respectively, the probe can monitor the corrosion degree of the downhole oil pipe, and the corrosion measuring probe can transmit the corrosion measurement data measured by the probe to the measuring storage module; The measurement storage module is capable of storing corrosion measurement data.

5. The downhole dynamic parameter continuous monitoring system according to claim 4, characterized in that: The data acquisition module also includes a temperature monitoring module; The temperature monitoring module is used to monitor the downhole temperature; The temperature monitoring module is connected to the measurement and storage module, and the measurement and storage module can store temperature monitoring data.

6. The downhole dynamic parameter continuous monitoring system according to claim 5, characterized in that: The data acquisition module also includes a pressure monitoring module; The pressure monitoring module is used to monitor downhole pressure; The pressure monitoring module is connected to the measurement storage module, and the measurement storage module can store pressure monitoring data.

7. The downhole dynamic parameter continuous monitoring system according to claim 6, characterized in that: The wireless signal transmission module is connected to the measurement storage module; The wireless signal transmission module can transmit the corrosion measurement data, temperature monitoring data and pressure monitoring data stored in the measurement storage module to the reading docking device.

8. The downhole dynamic parameter continuous monitoring system according to claim 6, characterized in that: The downhole monitoring device also includes a power supply module; The power supply module is connected to the measurement storage module and the data acquisition module respectively, and is suitable for supplying power to the measurement storage module and the data acquisition module.

9. The downhole dynamic parameter continuous monitoring system according to claim 8, characterized in that: The downhole monitoring device also includes a first cylinder, a second cylinder, a third cylinder and a connecting body; The first cylinder, the connecting body, the second cylinder, the third cylinder and the shell are connected in sequence; The power supply module is placed in the first cylinder; The measurement storage module is placed in the second cylinder; The temperature monitoring module and the pressure monitoring module are arranged in the third cylinder.

10. The downhole dynamic parameter continuous monitoring system according to claim 4, characterized in that: The bottom of the shell is conical; The flow passage is in the shape of a long hole.

11. The downhole dynamic parameter continuous monitoring system according to claim 1, characterized in that: An upper joint is arranged at the upper end of the well pipe suspension short section, and a lower joint is arranged at the lower end.

12. A method for continuous monitoring of downhole dynamic parameters, characterized in that: The downhole dynamic parameter continuous monitoring system according to any one of claims 1 to 11 comprises: Connecting the well pipe suspension nipple to the oil pipe and lowering it into the well along with the oil pipe; Lowering the downhole monitoring device into the oil pipe and hanging it in the central channel of the well pipe hanging nipple; Real-time monitoring of downhole parameters in downhole oil pipes through downhole monitoring devices; Lowering the reading docking device into the oil pipe until the reading docking device is within the signal radiation range of the wireless signal transmitting module, so as to trigger the wireless signal transmitting module and transmit the downhole parameters monitored by the downhole monitoring device to the reading docking device; The received downhole parameters are transmitted to the surface data processor through the reading interface.

13. Application of the downhole dynamic parameter continuous monitoring system according to any one of claims 1 to 11 in downhole dynamic parameter continuous monitoring.

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