Logging monitoring system and logging system

Abstract

The invention provides a logging monitoring system and a logging system. A mud pulse communication short section, a pressure short section and a mud pulse generator of the logging monitoring system are all arranged underground, and a ground case is arranged on the ground. In the process of transmitting logging information to the ground, an underground storage type logging system collects the logging information, sends the logging information to a mud pulse communication short section and controls a mud pulse generator to work according to the logging information to generate changes of the pressure of a vertical pipe, and a ground machine box collects the pressure of the vertical pipe so that the ground machine box can analyze the pressure of the vertical pipe. And logging information is obtained. In the process of transmitting the preset issuing instruction to the underground, the pressure short section collects the pressure of the vertical pipe and sends the pressure of the vertical pipe to the mud pulse communication short section, the mud pulse communication short section decodes the pressure of the vertical pipe to obtain the preset issuing instruction corresponding to the pressure of the vertical pipe, and the preset issuing instruction is sent to the storage type well logging system. And enabling the storage type logging system to work according to the preset issuing instruction.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, and in particular to a well logging monitoring system and a well logging system. Background Art

[0002] Traditional cable logging is suitable for vertical wells and small-angle wells. With the development of drilling technology, in order to improve the recovery rate, more and more high-angle and horizontal wells are being built. However, traditional cable construction cannot rely on the gravity of the instrument to reach the target layer. Therefore, the direct push method of drilling tools has been rapidly applied and developed. The direct push storage logging system can better meet the construction of high-angle and horizontal wells. The storage direct push logging system is simple to operate, has high logging time efficiency in short vertical depth and large displacement horizontal wells, and has upper and lower measurement data. In the context of the increasing length of the horizontal section of the current horizontal well, the advantages of this logging system are particularly prominent.

[0003] However, in direct-push storage logging, there is no communication between the downhole instrument, i.e. the storage logging system, and the ground, and the logging data is stored underground. Therefore, in storage mode, the downhole parameters cannot be uploaded to the ground, and the ground instructions cannot be sent to the downhole instrument. When encountering obstructions or jams, the technicians cannot understand the force and working conditions of the downhole instruments, nor can they retract the legs of the push-pull instruments, resulting in construction safety risks under complex well conditions. Summary of the invention

[0004] Based on this, it is necessary to provide a well logging monitoring system and a well logging system to address the above technical issues.

[0005] A logging monitoring method, comprising: a mud pulse communication sub, a pressure sub and a mud pulse generator, wherein the mud pulse communication sub is connected to the pressure sub and the mud pulse generator respectively, and the mud pulse communication sub is used to connect to a storage logging system;

[0006] The mud pulse communication sub is used to receive the logging information sent by the storage logging system, and control the mud pulse generator to work according to the logging information to generate a change in the standpipe pressure; wherein the standpipe pressure is collected through a ground cabinet;

[0007] The pressure sub is used to collect the standpipe pressure and send the standpipe pressure to the mud pulse communication sub. The mud pulse communication sub decodes the standpipe pressure, determines a preset sending instruction, and sends the preset sending instruction to the storage logging system.

[0008] In one embodiment, the system further comprises a battery short section; wherein,

[0009] The battery short section is connected to the mud pulse generator to supply power to the mud pulse generator; and / or,

[0010] The battery sub is connected to the mud pulse communication sub to supply power to the mud pulse communication sub; and / or,

[0011] The battery sub is connected to the pressure sub to supply power to the pressure sub.

[0012] In one embodiment, the system further includes a mud pump controller for connecting to the mud pump and controlling the mud pump to start and stop pumping according to a preset issued instruction. When the mud pump starts and stops pumping, a change in the riser pressure is generated.

[0013] In one embodiment, the mud pump controller is configured to control the mud pump to start and stop pumping according to a start identification instruction in accordance with a preset start identification rule; wherein the start identification instruction is executed prior to the preset issued instruction, and the start identification instruction is used to identify the start position of the preset issued instruction;

[0014] The mud pulse communication sub is configured to analyze the riser pressure to determine the start position of the preset issued instruction;

[0015] and / or;

[0016] The mud pump controller is configured to control the mud pump to start and stop pumping according to an end identification instruction in accordance with a preset end identification rule; wherein the end identification instruction is executed after the preset issued instruction, and the end identification instruction is used to identify the end position of the preset issued instruction;

[0017] The mud pulse communication sub is configured to analyze the riser pressure to determine the end position of the preset issued instruction.

[0018] In one embodiment, the mud pulse communication sub is configured to analyze the riser pressure to determine the preset issued instruction, and send the preset issued instruction to the memory logging system. The preset issued instruction is used to control the operation of the memory logging system; the changes in the riser pressure corresponding to two different preset issued instructions are different; the operations controlled by two different preset issued instructions for the memory logging system are different.

[0019] In one embodiment, the preset issued instruction is used to control the sequence of starting and stopping the pump, the single start time of the pump, and the single stop time of the pump. At least one of the sequence of starting and stopping the pump, the single start time of the pump, and the single stop time of the pump is different between two different preset issued instructions. The sequence of starting and stopping the pump is the combined sequence of starting and stopping the mud pump, the single start time of the pump is the duration of the single start signal of the mud pump, and the single stop time is the duration of the single stop signal.

[0020] In one embodiment, the logging information includes at least one of tension information, battery voltage information, and communication status.

[0021] In one embodiment, the preset issued instruction includes a leg-opening instruction, a leg-closing instruction, a battery power-on instruction, and a power-off instruction.

[0022] In one embodiment, the pressure sub-section includes two pressure sensors, and the pressure sub-section respectively collects downhole pressure signals through the two pressure sensors.

[0023] A logging system includes a memory logging system and the logging monitoring system described in any of the above embodiments.

[0024] In the above logging monitoring system and logging system, the mud pulse communication sub-section, the pressure sub-section, and the mud pulse generator of the logging monitoring system are all arranged underground, and the surface chassis is arranged on the ground. During the process of transmitting logging information to the ground, the memory logging system underground collects the logging information, sends the logging information to the mud pulse communication sub-section, controls the operation of the mud pulse generator according to the logging information, generates a change in the standpipe pressure, and the surface chassis collects the standpipe pressure so that the surface chassis analyzes the standpipe pressure to obtain the logging information. During the process of transmitting the preset issued instruction underground, the pressure sub-section collects the standpipe pressure, sends the standpipe pressure to the mud pulse communication sub-section, the mud pulse communication sub-section decodes the standpipe pressure to obtain the preset issued instruction corresponding to the standpipe pressure, and sends the preset issued instruction to the memory logging system, so that the memory logging system works according to the preset issued instruction. Thus, two-way information transmission between the logging system and the ground can be realized through the logging monitoring system. When encountering resistance or sticking, technicians can master logging information such as the force and working conditions of the memory logging system, and can also issue control instructions to control the push device to perform a leg-closing operation, reducing the construction safety risks in complex well conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the composition of the logging monitoring system in one embodiment;

[0026] Figure 2 It is a schematic structural diagram of the composition of the logging monitoring system in another embodiment;

[0027] Figure 3 It is a schematic diagram of uploading the status of downhole instruments in one embodiment;

[0028] Figure 4 It is a schematic diagram of issuing ground control instructions in one embodiment;

[0029] Figure 5Schematic structural diagram of a pressure nipple in an embodiment;

[0030] Figure 6 Schematic structural diagram of a logging monitoring system in an embodiment;

[0031] Figure 7 Schematic structural diagram of a logging monitoring system in another embodiment.

[0032] Reference numerals: 10, logging monitoring system; 100, mud pulse generator; 200, pressure nipple; 210, ITT 22-core socket; 220, pressure-bearing joint; 230, seven-core sealing plug; 240, sensor housing; 250, pressure sensor; 260, nut; 270, ITT 24-core connector; 300, suspension nipple; 400, mud pulse communication nipple; 500, battery nipple; 20, memory logging system; 30, surface chassis. Detailed implementation manners

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] Embodiment 1

[0035] In this embodiment, as Figure 6 and Figure 7 shown, a logging monitoring system 10 is provided, including: a mud pulse communication nipple 400, a pressure nipple 200, and a mud pulse generator 100. Among them, the mud pulse communication nipple 400 is respectively connected to the pressure nipple 200 and the mud pulse generator 100, and the mud pulse communication nipple 400 is used to connect to a memory logging system 20;

[0036] The mud pulse communication nipple 400 is used to receive logging information sent by the memory logging system 20, control the operation of the mud pulse generator 100 according to the logging information, and generate a change in the riser pressure; among them, the riser pressure is collected by a surface chassis 30;

[0037] The pressure nipple 200 is used to collect the riser pressure, send the riser pressure to the mud pulse communication nipple 400, and the mud pulse communication nipple 400 decodes the riser pressure, determines a preset downward instruction, and sends the preset downward instruction to the memory logging system 20.

[0038] In this embodiment, the mud pulse generator 100 functions as a valve. By acting on the pipeline where the mud is located, the mud pulse generator 100 blocks and dredges the mud, causing a change in the standpipe pressure in the pipeline. Different movement rhythms of the mud pulse generator 100 result in different changes in the standpipe pressure. After the mud pulse communication sub-section obtains the logging information, it controls the mud pulse generator 100 to perform corresponding movements according to the logging information, generating corresponding changes in the standpipe pressure. Different logging information leads to different movement rhythms of the mud pulse generator 100 and different corresponding changes in the standpipe pressure. When the ground needs to transmit a preset command downward, the mud in the pipeline can be pushed and blocked to cause a change in the standpipe pressure in the pipeline. The pressure sub-section 200 below the ground can collect the standpipe pressure, and the mud pulse communication sub-section analyzes the standpipe pressure to determine the preset command corresponding to the standpipe pressure.

[0039] In this embodiment, the mud pulse communication sub-section 400, the pressure sub-section 200, and the mud pulse generator 100 of the logging monitoring system 10 are all arranged below the ground, and the ground chassis 30 is arranged on the ground. During the process of transmitting logging information to the ground, the downhole memory logging system 20 collects the logging information, sends the logging information to the mud pulse communication sub-section 400, controls the mud pulse generator 100 to work according to the logging information, generates a change in the standpipe pressure, and the ground chassis 30 collects the standpipe pressure so that the ground chassis 30 can analyze the standpipe pressure to obtain the logging information. During the process of transmitting a preset command downward to the downhole, the pressure sub-section 200 collects the standpipe pressure, sends the standpipe pressure to the mud pulse communication sub-section 400, the mud pulse communication sub-section decodes the standpipe pressure to obtain the preset command corresponding to the standpipe pressure, and sends the preset command to the memory logging system 20, enabling the memory logging system 20 to work according to the preset command. Thus, two-way information transmission between the logging system and the ground can be achieved through the logging monitoring system 10. When encountering resistance or sticking, technicians can master logging information such as the force and working conditions of the memory logging system 20, and can also issue control commands to control the push-to-wall instrument to retract its legs, reducing the construction safety risks in complex well conditions.

[0040] Such as Figure 1As shown, in one embodiment, the system further includes a battery sub - section 500; wherein, the battery sub - section 500 is connected to the mud pulse generator 100 to supply power to the mud pulse generator 100; and / or, the battery sub - section 500 is connected to the mud pulse communication sub - section 400 to supply power to the mud pulse communication sub - section 400; and / or, the battery sub - section 500 is connected to the pressure sub - section 200 to supply power to the pressure sub - section 200. In this embodiment, in order to supply power to any one of the mud pulse generator 100, the mud pulse communication sub - section 400, and the pressure sub - section 200, the battery sub - section 500 is electrically connected to any one of the mud pulse generator 100, the mud pulse communication sub - section 400, and the pressure sub - section 200.

[0041] In one embodiment, the battery sub - section 500 and the power supply for the memory - type logging system 20 are independent power supplies. In this embodiment, since a large current is generated when the mud pulse generator 100 starts up, to avoid damaging the memory - type logging system 20, the memory - type logging system 20 and the mud pulse generator 100 are powered by different power supplies respectively, so as to prevent the current of the mud pulse generator 100 from damaging the memory - type logging system 20.

[0042] In one embodiment, the system further includes a mud pump controller, which is used to be connected to the mud pump and control the mud pump to start and stop pumping according to a preset issued instruction. Wherein, when the mud pump starts and stops pumping, a change in the standpipe pressure is generated. In this embodiment, the mud pump controller is used to control the start and stop of the mud pump. The mud pump pumps mud from the surface mud pit into the water eye of the drill string, circulates to the bottom of the well, flows out from the lowest drill string opening, and then returns to the surface mud pit through the annulus between the drill string and the wellbore, generating a change in the standpipe pressure.

[0043] In one embodiment, the mud pump controller is used to control the mud pump to start and stop pumping according to a start identification instruction in accordance with a preset start identification rule; wherein, the start identification instruction is executed prior to the preset issued instruction, and the start identification instruction is used to identify the starting position of the preset issued instruction; the mud pulse communication sub - section 400 is used to analyze the standpipe pressure to determine the starting position of the preset issued instruction; and / or; the mud pump controller is used to control the mud pump to start and stop pumping according to an end identification instruction in accordance with a preset end identification rule; wherein, the end identification instruction is executed after the preset issued instruction, and the end identification instruction is used to identify the ending position of the preset issued instruction; the mud pulse communication sub - section 400 is used to analyze the standpipe pressure to determine the ending position of the preset issued instruction.

[0044] In this embodiment, during the process of issuing a preset issuing instruction, the standpipe pressure changes in real time. Some of the changes are caused by the mud pump starting and stopping, and some are due to the flow of mud under the action of gravity or inertia, resulting in changes in the standpipe pressure. In order to identify the standpipe pressure generated by the mud pump from a long string of signals, before issuing the preset issuing instruction, a start identification instruction is first issued. The mud pump controller controls the corresponding start and stop of the mud pump according to the start identification instruction, generating corresponding changes in the standpipe pressure. When the mud pulse communication sub-section identifies this section of the signal, the end point of this section of the signal is the starting position of the signal corresponding to the preset issuing instruction. After issuing the preset issuing instruction, an end identification instruction is issued. The mud pump controller controls the corresponding start and stop of the mud pump according to the end identification instruction, generating corresponding changes in the standpipe pressure. When the mud pulse communication sub-section identifies this section of the signal, the starting point of this section of the signal is the end position of the signal corresponding to the preset issuing instruction.

[0045] In one embodiment, the mud pulse communication sub-section 400 is used to analyze the standpipe pressure, determine the preset issuing instruction, and send the preset issuing instruction to the memory logging system 20. The preset issuing instruction is used to control the operation of the memory logging system 20; the changes in the standpipe pressure corresponding to two different preset issuing instructions are different; the two different preset issuing instructions are used to control different operations of the memory logging system 20. In this embodiment, in order to control the memory logging system 20 more flexibly, there are multiple preset issuing instructions, and different preset issuing instructions are used to control the memory logging system 20 to perform different operations. The preset issuing instruction can be an instruction to control the density pushers of the memory logging system 20 to retract or extend. The preset issuing instructions corresponding to the density pusher retraction and the density pusher extension are different, and the mud pump will have different start and stop rhythms, generating different changes in the standpipe pressure, so as to distinguish between the two preset issuing instructions.

[0046] It should be understood that when the mud pump starts, the standpipe pressure increases, and the signal corresponding to the standpipe pressure collected by the pressure sub-section 200 is a high-level signal; when the mud pump stops, the standpipe pressure decreases, and the signal corresponding to the standpipe pressure collected by the pressure sub-section 200 is a low-level signal. The signal corresponding to the standpipe pressure is a combination of high and low levels, and the combinations of high and low levels corresponding to different preset issuing instructions are different.

[0047] In one embodiment, the preset issuing instruction is used to control the arrangement order of the switching pumps, the single pump start time, and the single pump stop time. Two different preset issuing instructions are different in at least one of the arrangement order of the switching pumps, the single pump start time, and the single pump stop time. Among them, the arrangement order of the switching pumps is the combined order of starting and stopping the mud pumps. The single pump start time is the duration of the single pump start signal of the mud pump, and the single pump stop time is the duration of the single pump stop signal. In this embodiment, in order to flexibly distinguish different preset issuing instructions, the movement rhythm of the mud pump can be controlled by controlling the arrangement order of the switching pumps, the single pump start time, and the single pump stop time, resulting in different changes in the standpipe pressure, so as to distinguish different preset issuing instructions.

[0048] Further, the start recognition instruction is used to control the arrangement order of the switching pumps, the single pump start time, and the single pump stop time. Among them, the change in the standpipe pressure corresponding to the start recognition instruction is different from that of the preset issuing instruction. Among them, the arrangement order of the switching pumps is the combined order of starting and stopping the mud pumps. The single pump start time is the duration of the single pump start signal of the mud pump, and the single pump stop time is the duration of the single pump stop signal. In this embodiment, in order to flexibly set the start recognition instruction, it can be set in the arrangement order of the switching pumps, the single pump start time, and the single pump stop time to determine the start recognition instruction, and flexibly set the start recognition instruction to control the movement rhythm of the mud pump. Further, the end recognition instruction is used to control the arrangement order of the switching pumps, the single pump start time, and the single pump stop time. Among them, the change in the standpipe pressure corresponding to the end recognition instruction is different from that of the preset issuing instruction.

[0049] Further, two different start recognition instructions are at least different in the arrangement order of the switching pumps, the single pump start time, and the single pump stop time. Among them, the arrangement order of the switching pumps is the combined order of starting and stopping the mud pumps. The single pump start time is the duration of the single pump start signal of the mud pump, and the single pump stop time is the duration of the single pump stop signal. In this embodiment, because.

[0050] Further, the preset issuing instruction includes a leg opening instruction, a leg retracting instruction, a battery charging instruction, and a power-off instruction. In this embodiment, in order to flexibly control the memory logging system 20, the preset issuing instruction includes a leg opening instruction, a leg retracting instruction, a battery charging instruction, and a power-off instruction, which are used to control the leg opening and leg retracting of the density pusher of the memory logging system 20, control the memory logging system 20 to receive electrical energy for charging, and disconnect from the power supply to achieve power-off.

[0051] In one embodiment, the logging information includes at least one of tension information, battery voltage information, and communication status. In this embodiment, for the convenience of ground personnel to timely understand the downhole conditions, the memory logging system 20 sends the tension information, battery voltage information, and communication status to the mud pulse communication sub-section. The mud pulse communication sub-section controls the actuation of the mud pulse generator 100 according to the tension information, battery voltage information, and communication status to generate a corresponding standpipe pressure. The ground chassis 30 analyzes the standpipe pressure to obtain the tension information, battery voltage information, and communication status.

[0052] As Figure 5 shown, in one embodiment, the pressure sub-section 200 includes two pressure sensors 250. The pressure sub-section 200 respectively collects downhole pressure signals through the two pressure sensors 250. In this embodiment, in order to improve the accuracy of standpipe pressure collection, the standpipe pressure is collected by installing two pressure sensors 250 in the pressure sub-section 200. When the difference between the standpipe pressures collected by the two pressure sensors 250 is small, it is determined that the collection of the standpipe pressure is correct.

[0053] As Figure 1 and Figure 2 shown, in one embodiment, the logging monitoring system 10 further includes a suspension sub-section 300. The mud pulse generator 100 and the pressure sub-section 200 are installed in the suspension sub-section 300. In this embodiment, for the convenience of installation of the mud pulse generator 100 and the pressure sub-section 200, the mud pulse generator 100 and the pressure sub-section 200 are installed in the suspension sub-section 300, and the relative positions between the mud pulse generator 100 and the pressure sub-section 200 are fixed within the suspension sub-section 300 to better protect the mud pulse generator 100 and the pressure sub-section 200.

[0054] In one embodiment, as Figure 5 shown, the pressure sub-section 200 includes an ITT 22-core socket 210, a pressure-bearing joint 220, a seven-core sealing plug 230, a sensor housing 240, a pressure sensor 250, a nut 260, and an ITT 24-core connector 270. The ITT 22-core socket 210 is installed inside the pressure-bearing joint 220. The pressure-bearing joint 220 is installed inside the sensor housing 240. The cavity inside the pressure-bearing joint 220 and the cavity inside the sensor housing 240 are isolated by the seven-core sealing plug 230. The pressure sensor 250 is installed on the sensor housing 240. The nut 260 is screwed to the sensor housing 240, and the nut 260 presses the pressure sensor 250 to limit the sensor. The output end of the pressure sensor 250 is connected to the ITT 24-core connector 270. In this embodiment, the pressure sub-section 200 installs the pressure sensor 250 through the sensor housing 240 to collect the standpipe pressure.

[0055] Embodiment Two

[0056] See Figure 1 and Figure 2 As shown in and, the logging monitoring system 10 of the present application includes a surface part and a downhole part. The surface part mainly realizes the reception of the mud pulse signal uploaded from the downhole and data recovery. The downhole part completes the upload of downhole information and the reception of surface commands. The downhole part includes a mud pulse generator 100, a pressure sub-section 200, an upper suspension, a mud pulse communication sub-section 400, and a battery sub-section 500. During logging, it is connected to the memory logging system 20 to realize instrument status monitoring and control. The mud pulse generator 100 uses a shear valve and an upper suspension method to generate positive pulses. The pressure sub-section 200 measures the change in the standpipe pressure during pump start and stop and the mud pressure information. The upper suspension is used for the fixed installation of the pulsator and is connected to the downhole tool. The mud pulse communication sub-section 400 realizes communication with the surface part and CAN communication between downhole tools. The battery sub-section 500 provides power for the mud pulse communication sub-section 400 and the mud pulse generator 100, with an output voltage of 28V and a maximum output current of 2A. Since the starting current is relatively large when the pulsator operates, to avoid potential risks to the memory logging system 20, the downhole part of the new monitoring system uses an independent battery for power supply. Each sub-section is connected through its respective mechanical interfaces and connectors. After the mud pulse generator 100 is connected to the pressure sub-section 200, it is installed in the upper suspension. The inside of the upper suspension is connected to the connector of the pressure sub-section 200 and fixed by the set screws on the outer shell of the upper suspension. The lower end of the upper suspension is connected to the mud pulse communication sub-section 400 and the battery sub-section 500. The upper suspension method is that the mud pulse generator 100 is suspended upward in the suspension sub-section 300, and the mud pulsator is fixed inside the upper suspension. Mud is the medium, and the mud pressure information is the carrier for signal transmission. The downhole tool is the memory logging system 20. The pressure sub-section 200 is also powered by the battery sub-section 500.

[0057] During the upload of downhole parameters, after the downhole part of the new memory logging monitoring system 10 is connected to the memory logging system 20, the memory logging system 20 regularly sends information such as tension, battery voltage, and communication status to the downhole part of the monitoring system through the CAN bus. During logging, when it is necessary to understand information such as the tension and battery voltage of downhole equipment, the mud can be circulated by opening the pump at the wellhead. Under the condition of stable mud circulation in the pipe, the mud pulse communication sub-section encodes and drives the pulsator to act on the tension, battery voltage, communication status, etc. information to form a mud pressure wave in the pipe. The surface chassis 30 collects the standpipe pressure, decodes and restores the relevant downhole status information for the operators to refer to. The specific operation steps are as follows: Keep the downhole system stationary (stop pulling up / down) for 1 minute, continuously circulate the mud by pumping for 2 minutes, and then the mud pulse communication sub-section 400 starts to encode and circulate and send information such as tension and battery voltage until the pump is stopped. Figure 3As shown. The memory logging system 20 sends logging information such as tension, battery voltage, and communication status to the mud pulse communication sub-section through the CAN bus. The pump is on the ground. The mud pump pumps mud from the surface mud pit into the drill pipe nozzle, circulates it to the bottom of the well, and after flowing out from the lowest drill pipe opening, it returns to the surface mud pit through the annulus between the drill pipe and the wellbore. The purpose of the mud pulse generator 100 is to cause a change in the standpipe pressure in the vertical pipe, so that the surface chassis 30 can detect the standpipe pressure. The surface chassis 30 decodes the standpipe pressure to obtain information such as tension and battery voltage.

[0058] In this embodiment, the tension is represented by an 8-bit binary number. The communication status and the battery voltage are represented by an 8-bit binary number. The communication status occupies the highest 1 bit, which is represented by 0 and 1. 0 means normal and 1 means abnormal; the battery voltage is represented by the remaining 7 bits. Tension, battery voltage, and communication status are represented by binary numbers, 0 and 1, that is, high and low levels. The mud pulse generator 100 is low level when it is on and high level when it is off. The mud pulse communication sub-section 400 converts the received information into binary numbers, that is, high and low levels, and drives the mud pulse generator 100 to act to generate changes in the standpipe high and low pressures. The pressure sensor 250 installed on the ground measures the high and low pressure changes and transmits them to the surface chassis 30 for decoding.

[0059] During the preset command issuance, the mud pulse communication sub-section cooperates with the pressure sub-section 200 to collect the pressure information in the drill pipe nozzle in real time. If the pressure increase amplitude per unit time is greater than the threshold value set before the instrument enters the well, it is considered that the pump is turned on. If the pressure decrease amplitude per unit time is greater than the set threshold value, it is considered that the pump is turned off. Compared with the preset relevant commands, if the continuous pump-on and pump-off time meets a certain command condition, it is considered that the surface has performed the command operation underground, and then relevant control actions are performed on the downhole instrument.

[0060] By means of opening and closing the pump at the wellhead and changing the pressure in the downhole pipe, a preset command is encoded and sent to the downhole system. The mud pulse communication sub-section 400 collects the downhole pressure change. After decoding and receiving the preset command, it sends the preset command to the memory logging system 20 through the CAN bus. The specific operation steps are as follows: Keep the downhole system stationary (stop lifting / lowering) for 1 minute, and perform pump-on for 1 minute, pump-off for 1 minute, and pump-on for 1 minute in sequence as signal synchronization information. After pump-off for 1 (2, 3) minutes, then perform pump-on and pump-off for 1 minute each in sequence as the preset command 1 (2, 3) information. Thus, a preset command issuance is completed. The schematic diagram of the surface preset command issuance is as Figure 4 shown.

[0061] In this embodiment, the pressure information collected by the mud pulse communication sub-section 400. For the pressure sub-section 200, only the pressure sensor 250 is installed, and there is no circuit measurement. When the mud pump is turned on and off, the pressure in the riser will change when the pump starts and stops. The pressure when the pump is on is high, which is considered as a high level, and the pressure when the pump is off is low, which is considered as a low level. The combination of high and low levels is used as the issued instruction. The downhole pressure is the change in the riser pressure when the pump starts and stops. The function of the signal synchronization information is used as the start judgment flag of the signal. The preset issued instruction consists of an instruction start judgment flag, an instruction, and an instruction end flag.

[0062] See Figure 4 , three different preset issued instructions. The preset issued instruction is transmitted by the change in the riser pressure generated by starting and stopping the pump. The preset issued instruction consists of an instruction start judgment (i.e., synchronization information), a specific instruction, and an instruction end flag. Different instructions are distinguished by the pump-on time, pump-off time, and the sequence of starting and stopping the pump.

[0063] Among them, the pressure information acquisition is completed by the pressure sub-section 200. The pressure sub-section 200 consists of a 22-core socket, a pressure-bearing joint 220, a seven-core sealing plug 230, a sensor housing 240, a pressure sensor 250, a nut 260, and a 24-core connector, etc., as Figure 5 . The upper end of the pressure sub-section 200 uses an ITT 22-core socket, and the lower end is a 24-core connector. After being connected to the mud pulse generator 100, they are together installed in the hanging sub-section 300, and the pulse generator and the drill collar are fixed with set screws. The pressure sub-section 200 is mainly used to install the pressure sensor 250, and the pressure sensor 250 is produced by a professional manufacturer. The specific indicators are 206 MPa and 200 °C. The pressure sub-section 200 is used for the lead wire, fixation, and installation of the pressure sensor 250, and the acquisition circuit is in the mud pulse communication sub-section 400. The drill collar is fixed on the upper suspension. The ITT 22-core socket 210 is the upper end of the pressure sub-section 200, which is connected to the mud pulse generator 100. ITT24 is the lower end of the pressure sub-section 200, which is connected to the 24-core connector inside the upper suspension. The lower end of the upper suspension sub-section 300 is connected to the mud pulse communication sub-section 400. The ITT 22-core socket 210 is installed in the pressure-bearing joint 220, and the pressure-bearing joint 220 is installed in the sensor housing 240. The cavity inside the pressure-bearing joint 220 and the cavity inside the sensor housing 240 are isolated by the seven-core sealing plug 230. The sealing plug has the function of pressure-bearing isolation. It prevents the failure of one area's seal from affecting another area. The metal diaphragm is installed in Figure 5 the pressure sensor 250. Each pressure sensor 250 can measure the wellbore pressure and the riser pressure when the pump starts and stops. By comparing whether the values measured by the two pressure sensors 250 differ too much, it is possible to judge whether there is a measurement deviation. Each pressure sensor 250 can measure the wellbore pressure and the change in the riser pressure when the pump starts and stops. It is a dual-backup measurement to improve the reliability of pressure detection, that is, even if one is damaged, normal measurement can still be guaranteed.

[0064] The reliability of pressure measurement is ensured by the following measures: (1) A high-precision pressure sensor is used in the pressure sub. When the mud pressure acts on the metal diaphragm of the sensor, the diaphragm will generate a deformation proportional to the medium pressure. The Wheatstone bridge composed of four diaphragms converts the deformation amount into a corresponding electrical signal. (2) Two pressure sensors are used in the pressure sub, which can simultaneously measure the wellbore pressure and the change of the standpipe pressure during pump start and stop, avoiding the deviation caused by a single pressure measurement and improving the reliability of measurement.

[0065] The construction of the original memory logging system in the prior art has the following problems:

[0066] (1) The stress state of the memory logging system cannot be uploaded to the ground, making it convenient for the driller to master the stress information of downhole instruments. In complex well conditions, the instrument is easily bent and damaged, posing a construction safety risk.

[0067] (2) Information such as the battery voltage and communication status of the memory logging system cannot be uploaded to the ground, and the logging personnel cannot timely master the information of the instrument, which is in a blind measurement state.

[0068] (3) The memory logging system cannot receive ground control commands, making it convenient for control operations such as power-on, power-off, pushing and pulling of the instrument.

[0069] In view of the above characteristics, the new memory logging monitoring system of the present application mainly solves the following problems:

[0070] (1) For the new memory logging monitoring system, the information of the tension sensor in the memory logging system is sent to the ground through the mud, received and decoded on the ground, and simultaneously displayed on the driller's display, facilitating the driller to accurately master the stress information of downhole instruments, reasonably adjust the weight on bit, and ensure safe construction;

[0071] (2) The new memory logging monitoring system uploads information such as the instrument battery voltage and communication status to the ground through mud pulse coding, facilitating the logging personnel to timely master the working status of the instrument.

[0072] (3) The new memory logging monitoring system uses the pressure sensor in the suspension sub to receive the ground pump stroke pressure signal. Different switch pump sequence times represent different instructions. After the memory logging system receives the ground instructions, relevant control operations are performed on the instrument.

[0073] The new memory logging monitoring system mainly has the following advantages:

[0074] (1) During the construction of complex wells and horizontal wells, the detection of the instrument status of the memory logging system is realized, facilitating the driller to timely master the downhole stress and other information, effectively reducing the construction risk, and playing an important role in improving construction safety.

[0075] (2) It can receive surface command information to control the instruments of the memory logging system, providing technical support for improving construction safety, curve quality, and reducing construction costs.

[0076] (3) Connect different mud pulse generators according to the transmission rate to meet the requirements of different amounts of uploaded data.

[0077] The key points of the present invention are as follows:

[0078] (a) The status of the instruments of the memory logging system can be uploaded to the surface, facilitating technicians to master information such as the stress on downhole instruments, communication status, and battery power, providing technical guarantee for the safe construction of direct-push memory logging.

[0079] (b) Monitor the mud pulse pump sequence sent from the surface, receive relevant surface command information to control the instruments of the memory logging system. Specifically, refer to the following (b1) and (b2):

[0080] (b1) Receive the command sent from the surface to realize the control of density push and leg opening, enabling the density probe to closely adhere to the wellbore wall, improving the quality of radioactive curves; receive the leg retraction command from the surface to improve the construction safety of radioactive instruments.

[0081] (b2) Receive the command sent from the surface to realize the control of battery power on and off, saving the construction cost of the battery.

[0082] (c) The new monitoring system adopts a short-section modular design and is connected to the upper end of the memory logging system, facilitating operation and construction.

[0083] (d) The new monitoring system has an independent power supply system and power management mode, which will not affect the memory logging.

[0084] (e) The new monitoring system stores and uploads the received downlink control information. After the operation is completed, the data can be replayed, facilitating the analysis of the construction process.

[0085] Embodiment III

[0086] Refer to Figure 1 , this embodiment provides a logging system, including a memory logging system 20 and the logging monitoring system 10 described in any one of the above.

[0087] In one embodiment, the logging system further includes a surface chassis 30 for collecting the change of riser pressure. In one embodiment, the logging system further includes a winch sensor, a hook load sensor, and a standpipe pressure sensor. The standpipe pressure sensor is connected to the surface chassis 30. The standpipe pressure sensor collects the riser pressure and sends the riser pressure to the surface chassis 30. The winch sensor and the hook load sensor are respectively connected to the depth system.

Claims

1. A logging monitoring system, characterized in that, Comprising: A mud pulse communication sub, a pressure sub, and a mud pulse generator. Among them, the mud pulse communication sub is respectively connected to the pressure sub and the mud pulse generator, and the mud pulse communication sub is used to connect to a memory logging system; The mud pulse communication sub is used to receive the logging information sent by the memory logging system, control the mud pulse generator to work according to the logging information, and generate a change in the riser pressure; among them, the riser pressure is collected by a surface chassis; The pressure sub is used to collect the riser pressure, send the riser pressure to the mud pulse communication sub, and the mud pulse communication sub decodes the riser pressure, determines a preset transmission instruction, and sends the preset transmission instruction to the memory logging system.

2. The system according to claim 1, wherein The system further includes a battery sub; among them, The battery sub is connected to the mud pulse generator and supplies power to the mud pulse generator; and / or, The battery sub is connected to the mud pulse communication sub and supplies power to the mud pulse communication sub; and / or, The battery sub is connected to the pressure sub and supplies power to the pressure sub.

3. The system according to claim 1, characterized in that, The system further includes a mud pump controller, which is used to connect to the mud pump and control the mud pump to start and stop according to a preset transmission instruction. Among them, when the mud pump starts and stops, a change in the riser pressure is generated.

4. The system according to claim 3, wherein: The mud pump controller is used to control the mud pump to start and stop according to a start identification instruction in accordance with a preset start identification rule; among them, the start identification instruction is executed prior to the preset transmission instruction, and the start identification instruction is used to identify the start position of the preset transmission instruction; The mud pulse communication sub is used to analyze the riser pressure to determine the start position of the preset transmission instruction; and / or; The mud pump controller is used to control the mud pump to start and stop according to an end identification instruction in accordance with a preset end identification rule; among them, the end identification instruction is executed after the preset transmission instruction, and the end identification instruction is used to identify the end position of the preset transmission instruction; The mud pulse communication sub is used to analyze the riser pressure to determine the end position of the preset transmission instruction.

5. The system according to claim 3, wherein The mud pulse communication sub is used to analyze the riser pressure to determine the preset transmission instruction, and send the preset transmission instruction to the memory logging system, and the preset transmission instruction is used to control the operation of the memory logging system; The changes in the riser pressure corresponding to two different preset transmission instructions are different; Two different preset transmission instructions are used to control the memory logging system to perform different operations.

6. The system according to claim 3, characterized in that The preset issued instruction is used to control the arrangement order of the on-off pumps, the single on-pump time, and the single off-pump time. Two different preset issued instructions are different in at least one of the arrangement order of the on-off pumps, the single on-pump time, and the single off-pump time. Wherein, the arrangement order of the on-off pumps is the combined order of the on-pump and off-pump of the mud pump, the single on-pump time is the duration of the single on-pump signal of the mud pump, and the single off-pump time is the duration of the single off-pump signal.

7. The system according to claim 1, wherein The logging information includes at least one of tension information, battery voltage information, and communication status.

8. The system according to claim 1, wherein The preset issued instructions include a leg-opening instruction, a leg-closing instruction, a battery power-on instruction, and a power-off instruction.

9. The system according to claim 1, characterized in that, The pressure sub-section includes two pressure sensors, and the pressure sub-section respectively collects downhole pressure signals through the two pressure sensors.

10. A logging system, characterized in that, It includes a memory logging system and the logging monitoring system according to any one of claims 1 to 9.

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