Drill string dynamic parameter measuring tool and ground-bottom rock breaking working condition analysis method

Abstract

The invention discloses a drill string dynamic parameter measuring tool and a ground-bottom rock breaking working condition analysis method, and the method comprises the steps: measuring underground dynamic parameters, and storing the data; transmitting the underground dynamic parameter data to a client, and establishing an underground dynamic parameter database; on the basis of comparison and analysis of the underground dynamic parameters and preset ground parameters, predicting and monitoring the motion state of an underground drill column; and predicting the rock breaking working condition through the motion state of the underground drill column. Compared with the prior art, the drilling rock breaking process has high uncertainty and opaqueness, the underground drill column motion state and the underground rock breaking working condition cannot be visually monitored, the underground rock breaking working condition can be analyzed and monitored by analyzing the dynamic parameter change of the drill column, the occurrence probability of underground complex accidents is reduced, and therefore safe and efficient production is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas drilling, and in particular relates to a drill string dynamic parameter measurement tool and a ground-hole bottom rock breaking condition analysis method. Background Art

[0002] In the process of oil and gas drilling and development, since most of the operating areas are located in deep and complex formations with higher temperatures and pressures and more complex geological structures, the process is highly uncertain and opaque, making it difficult to monitor the rock breaking conditions at the bottom of the well.

[0003] Researching and developing a method for monitoring and analyzing the bottom rock breaking conditions is an urgent task for drilling technicians. It is of great significance to ensure safe and fast drilling and maximize cost savings.

[0004] The Chinese patent (publication number CN116066086A) discloses a distributed multi-parameter measurement while drilling system and method, which mainly includes a downhole information collection unit, an information release unit, a ground receiving unit and a ground analysis and decision unit, which can realize the measurement of downhole parameters along the entire section of the drill string while drilling, understand the dynamic cleaning of drill cuttings at each point along the drill string, the equivalent circulation density of mud, the influx or loss of downhole fluid, predict the occurrence of accidents such as stuck drill and well collapse, and reduce drilling risks. However, the structure is relatively complex.

[0005] A Chinese patent (publication number CN115539017A) discloses a downhole parameter acquisition device and its control method. The device includes multiple analog signal ports, and its multiple data input terminals are respectively used to electrically connect with multiple downhole parameter measurement devices. It can timely collect and store downhole engineering parameter data at high speed, understand the rapidly changing downhole working conditions, and lay the foundation for formulating the optimal construction plan. However, the function is relatively simple, and it can only realize data acquisition and transmission. Summary of the invention

[0006] In view of the above problems, the present invention discloses a surface-bottom hole rock breaking working condition analysis method, comprising the following steps:

[0007] Measure the downhole dynamic parameters and save the data;

[0008] Transmitting the downhole dynamic parameter data to a client to establish a downhole dynamic parameter database;

[0009] Predicting and monitoring the movement state of the downhole drill string based on the comparison and analysis of the downhole dynamic parameters and the pre-set surface parameters;

[0010] The rock breaking condition is predicted by the movement state of the downhole drill string.

[0011] Furthermore, the surface parameters include: drilling pressure, top drive torque and top drive speed.

[0012] Furthermore, the downhole dynamic parameters include: actual drilling pressure, actual torque, actual rotation speed and axial acceleration.

[0013] Furthermore, after predicting and monitoring the movement state of the downhole drill string based on the comparison and analysis of the downhole dynamic parameters and the preset ground parameters, the method further includes:

[0014] Determine the transmission efficiency of torque and bit weight.

[0015] Furthermore, the transmission efficiency of the bit weight is determined by the following steps:

[0016] Based on the measured actual drilling pressure and downhole drilling pressure, determine C T value;

[0017] According to C T The value determines the transmission efficiency of drilling pressure;

[0018] If C T If the value is greater than the first threshold, it is considered that the transmission efficiency of the drilling pressure is high; if C T If the value is less than the first threshold, it is considered that the transmission efficiency of the bit pressure is low;

[0019] Among them, C T The value is determined by the following formula:

[0020]

[0021] C T is the transmission efficiency of bit pressure; WOB is downhole bit pressure; T top The actual drilling pressure.

[0022] Furthermore, the torque transmission efficiency is determined by the following steps:

[0023] Based on the measured actual torque and the torque of the drill bit, determine C TQ value;

[0024] According to C TQ The value determines the transmission efficiency of torque;

[0025] If C TQ If the value is greater than the second threshold, it is considered that the torque transmission efficiency is high; if C TQ If the value is less than the second threshold, it is considered that the torque transmission efficiency is low;

[0026] Among them, C TQ The value is determined by the following formula:

[0027]

[0028] C TQ is the torque transmission efficiency; TQ bit is the torque of the drill bit; TQ top is the actual torque.

[0029] Furthermore, the downhole drill string movement state includes normal drilling, axial vibration and torsional vibration.

[0030] Furthermore, the judgment condition of the axial vibration is as follows:

[0031] Judge by the peaks and troughs of the axial acceleration curve and the vibration conditions;

[0032] If the axial acceleration curve vibrates up and down or alternates between positive and negative, the drill string is vibrating axially.

[0033] Furthermore, the judgment condition of the torsional vibration is as follows:

[0034] When the actual speed curve fluctuates up and down, the drill string undergoes torsional vibration.

[0035] The present invention also discloses a drill string dynamic parameter measurement tool, the measurement tool comprising: an industrial computer, a transmission mechanism, a storage short circuit and a measurement short circuit;

[0036] The measuring short circuit is connected to the storage short circuit;

[0037] The storage short circuit is connected to the transmission mechanism;

[0038] The transmission mechanism is connected to the industrial computer;

[0039] The measuring short circuit is used to measure the downhole dynamic parameters;

[0040] The storage short circuit is used to store downhole dynamic parameter data;

[0041] The transmission mechanism is used to transmit the downhole dynamic parameter data to the client;

[0042] The industrial computer is used for:

[0043] Establish downhole dynamic parameter database, data processing and curve drawing;

[0044] Predicting and monitoring the movement state of the downhole drill string based on the comparison and analysis of the downhole dynamic parameters and the pre-set surface parameters;

[0045] The rock breaking condition is predicted by the movement state of the downhole drill string.

[0046] Compared with the prior art, the embodiments of the present invention have at least the following advantages:

[0047] 1) The present invention provides a method for analyzing the bottom rock breaking conditions based on the dynamic parameter measurement of the drill string. The drilling and rock breaking process has strong uncertainty and opacity, and it is impossible to intuitively monitor the movement state of the drill string and the bottom rock breaking conditions. The present invention can analyze and monitor the bottom rock breaking conditions by analyzing the changes in the dynamic parameters of the drill string, reduce the probability of complex accidents in the well, and thus achieve safe and efficient production;

[0048] 2) The measuring tool in the present invention has the functions of storing and wirelessly sending signals, and can measure real-time vibration parameters and high-precision actual drilling pressure and torque parameter information, making up for the shortcomings of logging data analysis, and can perform high-frequency vibration analysis and dynamic parameter analysis;

[0049] 3) The data transmission process of the measuring tool can adopt computer network technology to realize real-time data collection, aggregation, analysis and processing, which can effectively improve the efficiency of drilling operations. There is no cumbersome calculation and analysis process, which is convenient and fast. The data processing system has clear ideas and can ensure safe and stable production at the construction site.

[0050] 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 pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A flow chart of a surface-bottom-hole rock breaking working condition analysis method according to an embodiment of the present invention is shown;

[0053] Figure 2 A flowchart of measuring and analyzing bottom hole rock breaking conditions using drill string dynamic parameters according to an embodiment of the present invention is shown;

[0054] Figure 3 It shows a flow chart of judging the drill string motion state, torque and drilling pressure transmission efficiency according to an embodiment of the present invention;

[0055] Figure 4 shows a measured axial vibration curve according to an embodiment of the present invention;

[0056] Figure 5shows a downhole actual torque fluctuation curve measured according to an embodiment of the present invention;

[0057] Figure 6 shows a downhole drilling pressure fluctuation curve measured according to an embodiment of the present invention;

[0058] Figure 7 shows a fluctuation curve of the actual downhole rotation speed measured according to an embodiment of the present invention;

[0059] Figure 8 A schematic diagram showing the installation position of a measuring tool according to an embodiment of the present invention is shown;

[0060] Fig. 9 A schematic diagram of a measuring tool according to an embodiment of the present invention is shown;

[0061] Fig.10 A schematic diagram of stick-slip vibration according to an embodiment of the present invention is shown;

[0062] Fig.11 A schematic diagram of parameters when a drill is stuck according to an embodiment of the present invention is shown;

[0063] Fig.12 A schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention is shown.

[0064] Figure numerals: 1. industrial computer; 2. transmission mechanism; 3. storage short circuit; 4. measurement short circuit. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0066] In the process of oil or natural gas extraction, drilling operations are often required. The drilling and rock breaking process has strong uncertainty and opacity. The existing technology cannot intuitively monitor the movement state of the drill string downhole and the rock breaking conditions at the bottom of the hole, and cannot ensure fast and safe drilling operations. In order to solve the above problems in the prior art, the present invention proposes a drill string dynamic parameter measurement tool and a ground-bottom-hole rock breaking condition analysis method, which can analyze the bottom-hole rock breaking conditions by analyzing the changes in the dynamic parameters of the drill string.

[0067] Figure 1 FIG. 2 is a flow chart of a surface-bottom hole rock breaking condition analysis method according to an embodiment of the present invention. Figure 1As shown, a surface-bottom-hole rock breaking working condition analysis method proposed by the present invention comprises the following steps:

[0068] Measure the downhole dynamic parameters and save the data;

[0069] The downhole dynamic parameter data is transmitted to the client (industrial computer 1), a downhole dynamic parameter database is established, and then the data in the database is called according to actual needs, and the pre-built-in program code is used to perform data processing and curve drawing, and the data is updated and followed up in real time;

[0070] Using the processed data and curves, based on the comparison and analysis of the downhole dynamic parameters and the pre-set surface parameters, the downhole drill string movement state is predicted and monitored;

[0071] The rock breaking condition is predicted by the movement state of the downhole drill string.

[0072] A surface-bottom-hole rock breaking working condition analysis method proposed in the present invention can realize the measurement, storage and data processing of downhole dynamic parameters (actual drilling pressure, actual torque, actual rotation speed, axial acceleration), and on this basis, compare and analyze the downhole dynamic parameters and surface parameters (drilling pressure, rotary table / top drive torque, rotary table / top drive rotation speed), thereby realizing the monitoring, prediction and analysis of downhole rock breaking tools and ensuring the safety of drilling operations.

[0073] Here, it should be additionally explained that, in general, the analysis of the above steps can be used to predict and monitor the underground rock breaking conditions. If the effect is not good, it should be considered in time whether there are complex underground accidents to ensure safe and stable production.

[0074] Figure 2 The flowchart of using the drill string dynamic parameter measurement and analysis of the bottom hole rock breaking working condition according to an embodiment of the present invention is shown. Figure 2 As shown, in some embodiments, the process of measuring the downhole dynamic parameters and saving the data further includes the following steps:

[0075] Before drilling begins, on-site staff select appropriate installation locations at the bottom of the top drive and the top of the drill pipe according to the actual construction site conditions of the target well and the experience of drilling technicians, install measuring tools, and ensure smooth communication and data transmission.

[0076] After the measuring tool is installed, it is necessary to check the communication and data transmission of the measuring tool to prevent the measuring tool from having an abnormality, which may result in the inability to transmit the downhole dynamic parameters collected by the measuring tool to the industrial computer 1 in real time after drilling begins, and thus the inability to predict and monitor the movement state of the drill string, let alone predict the rock breaking conditions.

[0077] After drilling begins, when the drill string starts to rotate driven by the top drive torque, the drill bit starts to contact and penetrate the formation. At this time, the measurement tool starts to work immediately, reading the dynamic parameter values ​​at each moment, measuring, storing and transmitting the actual drilling pressure, actual torque, actual speed and axial acceleration. The measurement principles of the actual drilling pressure and actual torque are as follows:

[0078] The actual bit weight measured by the measuring tool:

[0079] T top =WOB+F 钻柱 (1)

[0080] The actual torque measured by the measuring tool:

[0081] TQ top =TQ bit +TQ 钻柱 (2)

[0082] Among them, under different depths and stable working conditions, F 钻柱 and TQ 钻柱 (i.e., the drilling pressure and top drive torque from the ground) can be accurately calibrated according to the actual drilling parameters. Therefore, it is only necessary to use the measurement short circuit 4 pairs of downhole drilling pressure WOB and drill bit torque TQ bit By measuring, the corresponding actual drilling pressure and actual torque can be obtained.

[0083] The calculation principle of the transmission efficiency of drilling pressure and torque is as follows:

[0084] The transmission efficiency of drilling pressure:

[0085]

[0086] Torque transmission efficiency:

[0087]

[0088] C T is the transmission efficiency of drilling pressure; C TQ is the torque transmission efficiency.

[0089] Then, the data in the storage short circuit 3 is transmitted to the client industrial computer 1 (computer) in real time by using the data real-time transmission mechanism 2, and a downhole dynamic parameter database is established. Then, the data in the database is called according to actual needs, and the pre-built-in program code is used to process the data and draw curves. The processed data and curves are used to compare and analyze the ground and downhole data, and the downhole drill string motion state is predicted and monitored, and the torque and drilling pressure transmission efficiency are analyzed. Among them, data processing refers to the use of the above formula (1), formula (2), formula (3) and formula (4) for calculation and processing, which will not be repeated here.

[0090] In some embodiments, the surface parameters include: bit pressure, top drive torque and top drive speed.

[0091] In some embodiments, the downhole dynamic parameters include: actual bit weight, actual torque, actual rotation speed and axial acceleration.

[0092] Figure 3 The following is a flowchart showing the drill string motion state, torque, and drilling pressure transmission efficiency judgment according to an embodiment of the present invention. Figure 3 As shown, in some embodiments, the predicting and monitoring of the downhole drill string movement state based on the comparison and analysis of the downhole dynamic parameters and the preset ground parameters also includes:

[0093] Determine the transmission efficiency of bit weight and torque.

[0094] The transmission efficiency of drilling pressure and torque can be inferred by calculating the measured downhole dynamic parameter data.

[0095] In some embodiments, the transmission efficiency of the bit weight is determined by the following steps:

[0096] For the transmission efficiency of drilling pressure, based on the measured actual drilling pressure and downhole drilling pressure, formula (3) is used to calculate and process on the industrial computer 1 to determine C T value;

[0097] According to C T The value determines the transmission efficiency of drilling pressure;

[0098] If C T If the value is greater than the first threshold, it is considered that the transmission efficiency of the bit pressure is high;

[0099] If C T If the value is less than the first threshold, it is considered that the transmission efficiency of the bit pressure is low.

[0100] Exemplarily, the first threshold may be set to 60%;

[0101] The torque truly reflects the friction and rock breaking resistance of the downhole drilling tool. The torque transmission efficiency characterizes the rock cutting state. When the cutting effect is good, the torque transmission efficiency is high.

[0102] In some embodiments, the torque transmission efficiency is determined by the following steps:

[0103] For the torque transmission efficiency, the actual torque and the torque of the drill bit are measured and calculated using formula (4) on the industrial computer 1 to obtain the corresponding C TQ value;

[0104] According to C TQ The value determines the torque transmission efficiency;

[0105] If C TQ If the value is greater than the second threshold, it is considered that the torque transmission efficiency is high;

[0106] If C TQ If the value is less than the second threshold, it is considered that the torque transmission efficiency is low.

[0107] Exemplarily, the second threshold may be set to 60%.

[0108] The drilling pressure and torque complement each other. The higher the drilling pressure, the greater the torque.

[0109] In some embodiments, the downhole drill string motion state includes normal drilling, axial vibration and torsional vibration.

[0110] In some embodiments, the judgment condition of the axial vibration is as follows:

[0111] For axial vibration, it is mainly through the axial acceleration a z Judge the peaks and troughs of the curve and the vibration of the curve;

[0112] If the difference between the peak and trough of the axial acceleration curve is large, and the axial acceleration curve can show obvious up and down vibration or positive and negative alternation, it is considered that the drill string has undergone severe axial vibration, that is, drill jumping has occurred.

[0113] The time-frequency characteristics of axial vibration can help determine whether there is drill jumping, stick-slip, circumferential periodic and intermittent fluctuations. At the same time, large fluctuations or stagnation in the downhole rotation speed are manifestations of stick-slip, which can be seen with the help of the rotation speed. The axial fluctuation amplitude indicates drill jumping. Generally, when the vibration is more than 40% higher than the average value, it can be considered as drill jumping.

[0114] The positive and negative signs of the axial acceleration indicate the direction, and alternating positive and negative values ​​means alternating directions of the acceleration.

[0115] In some embodiments, the torsional vibration determination condition is as follows:

[0116] For torsional vibration, i.e. stick-slip vibration, the actual speed ω is mainly used for judgment;

[0117] When the actual speed curve fluctuates violently, showing a minimum value close to 0 and a maximum value greater than the top drive speed ω0, it is considered that the drill string has torsional vibration.

[0118] Among them, when the speed ω is close to 0, it corresponds to the sticking stage, and when the speed ω>ω0, it corresponds to the slipping stage. The characteristic of stick-slip vibration is that the sticking stage and the slipping stage appear alternately.

[0119] like Fig.10 As shown, from Fig.10 (a) shows that the drill string fluctuates intermittently, and the axial vibration in the wellbore is weak, only about 5g. Fig.10 (b) Fig.10 In (c), it can be seen that the drill string fluctuates intermittently, and the lateral vibration in the wellbore is large, around 15g; Fig.10 (d) shows that the speed fluctuates periodically. Fig.10 It can be seen that the rotation of downhole drilling tools has the characteristics of periodic stagnation and instantaneous release, which has a viscosity effect.

[0120] The present invention realizes the analysis of the bottom hole rock breaking conditions during the drilling process, and forms a method for analyzing the bottom hole rock breaking conditions based on the measurement of drill string dynamic parameters. During the analysis process, it is only necessary to install the measuring tool at the corresponding position and ensure smooth data transmission. There is no need for drilling technicians to make other complex adjustments to the equipment, thereby reducing the cumbersomeness of predicting the bottom hole rock breaking conditions, realizing real-time analysis and monitoring of the bottom hole rock breaking conditions, and reducing the workload of technicians.

[0121] Fig. 9 FIG. 2 shows a schematic diagram of a measuring tool according to an embodiment of the present invention. Fig. 9 As shown, based on the above-mentioned ground-bottom hole rock breaking working condition analysis method, the present invention also discloses a drill string dynamic parameter measurement tool to measure downhole dynamic parameters, and the drill string dynamic parameter measurement tool includes: an industrial control computer 1, a transmission mechanism 2, a storage short circuit 3 and a measurement short circuit 4;

[0122] The measuring short circuit 4 is connected to the storage short circuit 3;

[0123] The storage short circuit 3 is connected to the transmission mechanism 2;

[0124] The transmission mechanism 2 is connected to the industrial computer 1;

[0125] The measuring short circuit 4 is used to measure the downhole dynamic parameters;

[0126] The storage short circuit 3 is used to store downhole dynamic parameter data;

[0127] The transmission mechanism 2 is used to transmit the downhole dynamic parameter data stored in the storage short circuit 3 to the client;

[0128] The industrial computer 1 is used for:

[0129] Establish downhole dynamic parameter database, data processing and curve drawing;

[0130] Predicting and monitoring the movement state of the downhole drill string based on the comparison and analysis of the downhole dynamic parameters and the pre-set surface parameters;

[0131] The rock breaking condition is predicted by the movement state of the downhole drill string.

[0132] Figure 8 FIG. 2 shows a schematic diagram of the installation position of a measuring tool according to an embodiment of the present invention. Figure 8 As shown in the figure, the drill string dynamic parameter measurement tool is installed at the connection between the top drive and the drill string, and does not interfere with normal drilling. It can effectively evaluate the changes in downhole drilling pressure and torque to ensure the accuracy of the measurement results. The measurement tool has a dual range, the large range is used to measure the approximate values ​​of downhole drilling pressure and actual torque, and the small range is used to measure the slight changes in downhole drilling pressure and actual torque.

[0133] A drill string dynamic parameter measuring tool disclosed in the present invention comprises a measuring short circuit 4, a storage short circuit 3, a transmission mechanism 2 and an industrial computer 1, and can adapt to various complex working environments, can measure downhole dynamic parameters in real time, and ensure measurement accuracy. The drill string dynamic parameter measuring tool has a compact structure and high structural strength, can perform measurement work downhole for a long time, provides a guarantee for real-time data collection, realizes the prediction and monitoring of the drill string movement state, and further realizes the prediction of the rock breaking condition, thereby ensuring the operation progress and safety of the drilling operation.

[0134] The measuring tool in the present invention has the functions of storing and wirelessly sending signals, can measure real-time vibration parameters and high-precision actual drilling pressure and actual torque parameter information, make up for the shortcomings of logging data analysis, and can perform high-frequency vibration analysis and dynamic parameter analysis.

[0135] The data transmission process of the measuring tool can adopt computer network technology to realize real-time data collection, aggregation, analysis and processing, which can effectively improve the efficiency of drilling operations. There is no cumbersome calculation and analysis process, which is convenient and fast. The data processing system has clear ideas and can ensure safe and stable production at the construction site.

[0136] Example

[0137] The drill string dynamic parameter measurement tool and the surface-bottom hole rock breaking condition analysis method of the present invention are applied to shale gas production strata in Sichuan and Chongqing.

[0138] The specific method of surface-bottom rock breaking condition analysis method is as follows:

[0139] Step 1: According to the actual situation of the target well, select a suitable location at the bottom of the top drive and the top of the drill pipe to install the measurement tool, while ensuring smooth communication and data transmission.

[0140] Step 2: During the drilling process, when the drill string starts to rotate due to the top drive torque, the drill bit starts to contact and penetrate the formation. At this time, the measuring tool starts to work immediately, reading the dynamic parameter values ​​at each moment, and measuring, storing and transmitting the actual drilling pressure, actual torque, actual rotation speed and axial acceleration.

[0141] Step 3: Using the data processing program pre-installed in the industrial computer 1 (in the client computer), the received dynamic data is processed according to formula (1), formula (2), formula (3) and formula (4), and the curves corresponding to different parameters are calculated and drawn.

[0142] Figure 5 FIG. 2 shows a measured actual downhole torque fluctuation curve according to an embodiment of the present invention. Figure 5 As shown, it can be seen that the torque fluctuates up and down to a certain extent during this time period, and there is a sharp increase in torque during 5000-7000s. It is considered that the drill bit may have a certain degree of stick-slip vibration.

[0143] Figure 6 FIG. 2 shows a downhole drilling pressure fluctuation curve measured according to an embodiment of the present invention. Figure 6 As shown, it can be seen that the drilling pressure fluctuates up and down to a certain extent during this period. There are sharp increases and decreases in the drilling pressure from 5000s to 8000s, and there is a sharp decrease in the drilling pressure from 11000 to 13000s. Further investigation should be carried out to see whether there are any complex accidents underground.

[0144] Step 4: The dynamic parameter related curve obtained in the previous step will be presented to the user in real time, and will be updated in real time as the drilling and rock breaking process progresses. According to the changes in the curve, the user can determine the movement state of the drill string at the current moment (well depth).

[0145] Figure 4 FIG. 2 shows the axial vibration curve measured according to an embodiment of the present invention. Figure 4 As shown, the maximum difference between the peak and trough of the axial acceleration curve is about 80g (g is the acceleration of gravity), and the axial acceleration curve alternates between positive and negative, which indicates that the drill string has undergone a certain degree of axial vibration.

[0146] Figure 7 FIG. 2 shows a fluctuation curve of the actual downhole speed measured according to an embodiment of the present invention. Figure 7 As shown, the actual speed curve is sometimes close to 0 and sometimes greater than the top drive speed (the top drive speed is 70 rpm), which shows that torsional vibration occurs. Figure 7 In the calculation, the positive or negative value of the rotation speed represents the direction of rotation of the drill bit. For example, if it rotates clockwise, it is positive, and if it rotates counterclockwise, it is negative.

[0147] Step 5: According to the movement state of the drill string downhole, the current rock breaking condition at the bottom of the well can be analyzed.

[0148] The fluctuation of rotation speed and axial vibration period can be considered as stick-slip, the fluctuation of axial period that is 40% higher than the normal average value can be considered as drill jumping, and high torque, low rotation speed or no rotation speed can be considered as drill sticking.

[0149] For example, Fig.11 (a) is a schematic diagram of the rotation speed and time when the drill is stuck; Fig.11 (b) is a schematic diagram of drilling pressure / torque and time when the drill is stuck; Fig.11 (c) is a schematic diagram of vibration and time when the drill is stuck; Fig.11 (d) is a schematic diagram of pressure and time when the drill is stuck. Fig.11 As shown in (a), 11(b), 11(c), and 11(d), during the stuck drill period, the speed stops suddenly, the torque increases sharply, and the vibration stops. Within the unstuck operation range, the pressure inside and outside the drill pipe fluctuates unstably, and the drilling pressure and torque fluctuate abnormally. Therefore, when the speed is less than 30rpm, the drilling pressure fluctuation value exceeds the normal average value by 20%, and the torque fluctuation value exceeds the normal average value by 30% at the same time, it can be identified as a stuck drill.

[0150] The above 5 steps can be used as the overall process Figure 2 and Figure 3 Through the above-mentioned method, the bottom rock breaking conditions during drilling can be better analyzed and monitored, the probability of complex accidents underground can be reduced, and safe and efficient production can be achieved.

[0151] Fig.12 FIG. 2 shows a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present invention. Fig.12 As shown, the electronic device provided in this embodiment includes: at least one processor 121 and a memory 122. The processor 121 and the memory 122 are connected via a bus 123.

[0152] In a specific implementation process, at least one processor 121 executes the computer execution instructions stored in the memory 122, so that at least one processor 121 executes the method in the above method embodiment.

[0153] The specific implementation process of the processor 121 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0154] In the above Fig.10 In the illustrated embodiment, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0155] The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk storage.

[0156] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0157] An embodiment of the present invention further provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the method of the above method embodiment is implemented.

[0158] The computer-readable storage medium mentioned above can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0159] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0160] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0161] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The surface-bottom-hole rock breaking working condition analysis method is characterized by: The following steps are involved: Measure the downhole dynamic parameters and save the data; Transmitting the downhole dynamic parameter data to a client to establish a downhole dynamic parameter database; Based on the comparison and analysis of the downhole dynamic parameters and the pre-set surface parameters, predict and monitor the downhole drill string movement state; The rock breaking condition is predicted by the movement state of the downhole drill string.

2. The surface-bottom-hole rock breaking working condition analysis method according to claim 1 is characterized in that: The surface parameters include: drilling pressure, top drive torque and top drive speed.

3. The surface-bottom-hole rock breaking working condition analysis method according to claim 1 is characterized in that: The downhole dynamic parameters include: actual drilling pressure, actual torque, actual rotation speed and axial acceleration.

4. The surface-bottom-hole rock breaking working condition analysis method according to claim 1, characterized in that: After predicting and monitoring the movement state of the downhole drill string based on the comparison and analysis of the downhole dynamic parameters and the preset ground parameters, the method further includes: Determine the transmission efficiency of torque and bit weight.

5. The surface-bottom-hole rock breaking working condition analysis method according to claim 4 is characterized in that: The transmission efficiency of the bit weight is determined by the following steps: Based on the measured actual drilling pressure and downhole drilling pressure, determine C T value; According to C T The value determines the transmission efficiency of drilling pressure; If C T If the value is greater than the first threshold, it is considered that the transmission efficiency of the drilling pressure is high; if C T If the value is less than the first threshold, it is considered that the transmission efficiency of the bit pressure is low; Among them, C T The value is determined by the following formula: C T is the transmission efficiency of bit pressure; WOB is downhole bit pressure; T top The actual drilling pressure.

6. The surface-bottom-hole rock breaking working condition analysis method according to claim 4, characterized in that: The torque transmission efficiency is determined by the following steps: Based on the measured actual torque and the torque of the drill bit, determine C TQ value; According to C TQ The value determines the transmission efficiency of torque; If C TQ If the value is greater than the second threshold, it is considered that the torque transmission efficiency is high; If C TQ If the value is less than the second threshold, it is considered that the torque transmission efficiency is low; Among them, C TQ The value is determined by the following formula: C TQ is the torque transmission efficiency; TQ bit is the torque of the drill bit; TQ top is the actual torque.

7. The surface-bottom-hole rock breaking working condition analysis method according to claim 1, characterized in that: The downhole drill string movement states include normal drilling, axial vibration and torsional vibration.

8. The surface-bottom-hole rock breaking working condition analysis method according to claim 7, characterized in that: The judgment conditions of the axial vibration are as follows: Judge by the peaks and troughs of the axial acceleration curve and the vibration conditions; If the axial acceleration curve vibrates up and down or alternates between positive and negative, the drill string is vibrating axially.

9. The surface-bottom-hole rock breaking working condition analysis method according to claim 7, characterized in that: The judgment conditions of the torsional vibration are as follows: When the actual rotation speed curve fluctuates up and down, the drill string undergoes torsional vibration.

10. A drill string dynamic parameter measurement tool, characterized in that: The measuring tool comprises: an industrial computer (1), a transmission mechanism (2), a storage short circuit (3) and a measuring short circuit (4); The measuring short circuit (4) is connected to the storage short circuit (3); The storage short circuit (3) is connected to the transmission mechanism (2); The transmission mechanism (2) is connected to the industrial computer (1); The measuring short circuit (4) is used to measure the downhole dynamic parameters; The storage short circuit (3) is used to store downhole dynamic parameter data; The transmission mechanism (2) is used to transmit the downhole dynamic parameter data to the client; The industrial computer (1) is used for: Establish downhole dynamic parameter database, data processing and curve drawing; Based on the comparison and analysis of the downhole dynamic parameters and the pre-set surface parameters, predict and monitor the downhole drill string movement state; The rock breaking condition is predicted by the movement state of the downhole drill string.

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