Intelligent Monitoring Method for Rotary Drilling State Based on Geophysical Exploration Data

Abstract

The present invention relates to an intelligent monitoring method for the rotary drilling state based on geophysical exploration data. It includes: a geophysical exploration data acquisition step for acquiring geophysical exploration data during rotary drilling, where the geophysical exploration data at least includes dip angle, azimuth angle, and tool face angle; a drilling state judgment step for judging the current state of rotary drilling according to the change of the tool face angle and respectively recording the online time corresponding to the working state; a hole depth information determination step for marking effective geophysical exploration data and accumulating the hole depth information according to the preset drill pipe based on the rotary drilling working state and the online time of this state. Therefore, through the automatic acquisition and intelligent analysis of the geophysical exploration data that originally needs to be collected, after the drilling construction is completed, the analysis result can be exported to an explosion-proof terminal outside the hole to realize the statistics of the drilling construction state.

Description

Technical Field

[0001] The present invention relates to a drilling monitoring method, belonging to the technical field of drilling, and specifically to an intelligent monitoring method for the rotary drilling state based on geophysical exploration data. Background Art

[0002] According to the actual requirements of coal mine safety production, a large number of water exploration and drainage boreholes and gas extraction boreholes need to be constructed underground in coal mines. Especially in high-gas and coal and gas outburst mines, in order to effectively manage and utilize the gas in the coal seam, a large number of gas extraction boreholes are drilled. Based on different uses and different drill field environments, the construction drilling methods of the boreholes are also different. The conventional drilling methods mainly include directional drilling and rotary drilling. Generally, the rotary drilling construction method is mostly used in the construction of medium and shallow depth boreholes such as the middle extraction roadway or the bottom extraction roadway in coal mines. Regarding the state information of rotary drilling construction, the shift foreman of each shift will make relatively detailed records, such as the footage of this shift, the depth of the constructed borehole, the duration of drilling stop, the duration of construction drilling, etc. However, due to the narrow space in the drill field, large amount of coal ash and the phenomenon of drilling fluid splashing, there are problems of missing, damaged or unclear underground historical records over time. Although the shift foreman still needs to re-record the drilling state information of the shift in the duty room logbook based on memory after ascending the shaft, the information has a certain degree of randomness. Moreover, in order to statistically analyze the construction state information of borehole drilling, the duty personnel also need to electronically transcribe the written records, which is time-consuming and laborious, and it is difficult to match the current requirements of intelligent and less-manpower coal mine construction.

[0003] To overcome the above problems, the present invention proposes an intelligent monitoring method for the rotary drilling state based on geophysical exploration data. This method does not require additional operating costs, is not affected by the drill field environment, and is not affected by human factors. By automatically collecting and intelligently analyzing the geophysical exploration data that originally needs to be collected, after the drilling construction is completed, the classified and statistical results are exported to the explosion-proof terminal outside the hole and the computer in the ground duty room, realizing the statistics and analysis of the drilling construction state. This method has the advantages of intelligence, paperless, integration of collection and analysis, etc., and can also realize the digital measurement of the borehole depth. Summary of the Invention

[0004] The following presents a brief overview of one or more aspects to provide a basic understanding of these aspects. This overview is not an exhaustive survey of all contemplated aspects, and is neither intended to identify key or decisive elements of all aspects nor to attempt to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that follows.

[0005] Aiming at the many problems existing in the existing means, the purpose of the present invention is to propose an intelligent monitoring method for the rotary drilling state based on geophysical exploration data, to solve the problems of missing, damaged or not easily recognized by other team members of the historical records caused by the drilling site environment and the random errors in the recorded information, and to realize the intelligence and paperless of the statistical method of the rotary drilling construction state. This method does not require additional operating costs, is not affected by the drilling site environment, and is not affected by human factors.

[0006] In order to solve the problems existing in the above technical means, the present invention is realized by adopting the following technical solutions:

[0007] An intelligent monitoring method for the rotary drilling state based on geophysical exploration data, including:

[0008] The geophysical exploration data acquisition step is used to acquire geophysical exploration data during the rotary drilling process, and the geophysical exploration data at least includes dip angle, azimuth angle, and tool face angle;

[0009] The drilling state judgment step is used to judge the current state of the rotary drilling according to the change of the tool face angle and record the online time of the corresponding working state respectively;

[0010] The hole depth information determination step is used to mark the effective geophysical exploration data and accumulate the hole depth information according to the preset drill pipe according to the rotary drilling working state and the online time of this state.

[0011] Preferably, for the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data,

[0012] In the geophysical exploration data acquisition step, the inclinometer sensor module is used to output the current attitude information of the drill string at a preset output frequency.

[0013] Preferably, for the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data, in the drilling state judgment step,

[0014] When the change amount ΔΩ of the tool face angle satisfies formula (1) and the duration ΔT of this change satisfies formula (2), then the measuring instrument and the drill string in the current hole are in a static state, and the system determines that the rotary drilling is currently in the drilling stop working state, and accumulatively records the online time T of the drilling stop working state t .

[0015] ΔΩ = Ω i+1 -Ω i ≤0.5 (1)

[0016] ΔT > T1 (2)

[0017] Where:

[0018] ΔΩ: The change amount of the tool face angle, unit is °;

[0019] Ω i+1 : Measured value of the tool face angle at the current sampling point, unit: °;

[0020] Ω i : Measured value of the tool face angle at the previous sampling point, unit: °;

[0021] ΔT: Duration of the change in the tool face angle, unit: second;

[0022] T1: Anti-disturbance threshold value of the change in the tool face angle, unit: second.

[0023] Preferably, for the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data,

[0024] In the drilling state judgment step, when the change amount ΔΩ of the tool face angle satisfies formula (3) and the duration ΔT of this change satisfies formula (2), then the measuring instrument and the drill string in the current hole are in the drilling construction state, the system determines that the rotary drilling is currently in the drilling working state, and accumulatively records the online time Tz of this state.

[0025] ΔΩ = Ω i+1 -Ω i >0.5 (3)

[0026] Wherein:

[0027] △Ω: Change amount of the tool face angle, unit: °;

[0028] Ω i+1 : Measured value of the tool face angle at the current sampling point, unit: °;

[0029] Ω i : Measured value of the tool face angle at the previous sampling point, unit: °;

[0030] T z : Duration of the drilling working state, unit: second.

[0031] Preferably, for the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data, in the hole depth information determination step,

[0032] When in the drilling stop working state, if the duration ΔT of the change in the tool face angle satisfies formula (4) and the time interval between the previous effective measurement point and the current drilling stop state satisfies formula (5), then it is considered that the measuring instrument is in an effective drilling stop, and an effective measurement point position marking needs to be carried out;

[0033] T2 < ΔT < T3 (4)

[0034] T4 < ΔT t =T t(j+1) -T t(j) <T5 (5)

[0035] T2: The lower threshold of the duration of the change in the tool face angle of the current valid drill stop tool, in seconds;

[0036] T3: The upper threshold of the duration of the change in the tool face angle of the current valid drill stop tool, in seconds;

[0037] ΔT t : The time change amount between two adjacent valid drill stop measurement points, in seconds;

[0038] T t(j+1) : The total cumulative timing duration from the start of measurement to the current measurement point, in seconds;

[0039] T t(j) : The total cumulative timing duration from the start of measurement to the previous measurement point, in seconds;

[0040] T4: The lower threshold of the time interval between two adjacent valid measurement points, in seconds;

[0041] T5: The upper threshold of the time interval between two adjacent valid measurement points, in seconds.

[0042] Preferably, in the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data, in the hole depth information determination step, if the duration of the change in the tool face angle ΔT satisfies formula (6), it is considered that the measuring instrument is in a long-term drill stop state, and the number of long-term drill stops N and the cumulative long-term drill stop time T are recorded c ;

[0043] ΔT≥T6 (6).

[0044] Preferably, in the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data, the effective measurement point marking is to offset a number of sampling points backward from the lower threshold of the duration of the change in the tool face angle of the current valid drill stop tool as the effective measurement point.

[0045] Preferably, the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data further includes: a data transmission step, which is used to export the effective data identified and analyzed by intelligence to an explosion-proof terminal outside the hole after the drilling is completed, display the data or bring it to the duty room and upload it to the computer PC terminal.

[0046] Preferably, for the above intelligent monitoring method for the rotary drilling state based on geophysical exploration data, after the current borehole construction drilling is completed, the drill is retracted, the measuring instrument is restarted, and it establishes a wireless WiFi connection with the explosion-proof terminal outside the hole, and a data file containing information such as the duration Tt of the stop-drilling working state, the duration Tz of the drilling working state, the number N of long-time stop-drilling times, the cumulative recorded long-time stop-drilling time, the effective sampling data, and the corresponding system time and borehole depth data is exported. The on-duty personnel take it to the ground duty room and upload it to the computer PC side, and the technician checks and further analyzes it.

[0047] Therefore, compared with the prior art, the advantages of the present invention are as follows: This method does not require additional operating costs, is not affected by the drill field environment, and is not affected by human factors. Through automatic collection and intelligent analysis of the geophysical exploration data that originally needs to be collected, after the drilling construction is completed, the analysis results are exported to the explosion-proof terminal outside the hole to realize the statistics of the drilling construction state. This method has the advantages of intelligence, paperless, integration of collection and analysis, etc., and can also realize the digital measurement of the borehole depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The drawings incorporated herein and forming a part of the specification illustrate embodiments of the present invention, and together with the specification further serve to explain the principles of the present invention and enable those skilled in the art to make and use the present disclosure.

[0049] Figure 1 It is a flowchart of the implementation of the intelligent monitoring method for the rotary drilling state based on geophysical exploration data in the present invention.

[0050] Figure 2 It is a flowchart of the recognition of the drilling state in the present invention.

[0051] Figure 3 It is a flowchart of the marking of effective data in the stop-drilling working state in the present invention.

[0052] Figure 4 It is a flowchart of data export after the completion of the drilling construction in the present invention.

[0053] Embodiments of the present invention will be described with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] Embodiment

[0055] As Figure 1 shown, a kind of intelligent monitoring method for the rotary drilling state based on geophysical exploration data provided by the embodiment of the present invention includes the following steps during the rotary drilling construction in the coal mine underground:

[0056] Step 1: Collection of geophysical exploration data during the rotary drilling process, and the collected data includes at least dip angle, azimuth angle, and tool face angle;

[0057] Step 2: According to the change of the tool face angle, judge the current state of rotary drilling, that is, the drilling state or the drilling stop state, and record the online time of the corresponding working state respectively;

[0058] Step 3: Based on the rotary drilling working state identified in Step 2 and the online time of this state, mark the effective geophysical exploration data and accumulate the drilling depth information according to the preset drill pipe;

[0059] Step 4: After the drilling is completed, export the effective data identified and analyzed by intelligence to the explosion-proof terminal outside the hole, and display the data or take it to the duty room to upload it to the computer PC side.

[0060] For the intelligent monitoring method of rotary drilling state based on geophysical exploration data described in the present invention, in Step 1, the data acquisition method is as follows:

[0061] Use a measurement-while-drilling instrument that at least includes an inclinometer sensor module. The inclinometer sensor module outputs the current attitude information of the drill string at a fixed output frequency of 1 Hz, and stores the full information of the sampling point time in the built-in large-capacity memory of the instrument. The parameters that can be measured by the inclinometer sensor module include inclination angle, azimuth angle, and tool face angle. Among them, the inclination angle measurement range is -90° to 90°, the absolute error is ±0.3°, the azimuth angle measurement range is 0° to 360°, the absolute error is ±1.5°, and the tool face angle measurement range is 0° to 360°, the absolute error is ±0.3°; the full information includes the drill string attitude information collected by the inclinometer sensor but is not limited to this single parameter and other geophysical exploration data and measurement time information; the measurement time refers to the system time when measuring at the current measurement point, including year, month, day, hour, minute, and second information, and this time information is provided by a high-precision clock circuit.

[0062] For the intelligent monitoring method of rotary drilling state based on geophysical exploration data described in the present invention, in Step 2, the method for identifying the rotary drilling working state is as follows:

[0063] The identification of the rotary drilling working state mainly depends on the change amount and change duration of the tool face angle in the geophysical exploration data collected in Step 1. The judgment conditions are as follows:

[0064] (1) Identification of the drilling stop working state

[0065] When the change amount ΔΩ of the tool face angle satisfies formula (1) and the change duration ΔT satisfies formula (2), the measuring instrument and drill string in the current hole are in a static state, and the system determines that the rotary drilling is currently in the drilling stop working state, and accumulatively records the online time T of the drilling stop working state t .

[0066] ΔΩ = Ω i+1 -Ω i≤0.5 (1)

[0067] ΔT>T1 (2)

[0068] Wherein:

[0069] ΔΩ: Tool face angle change amount, unit is °;

[0070] Ω i+1 : Measured value of tool face angle at the current sampling point, unit is °;

[0071] Ω i : Measured value of tool face angle at the previous sampling point, unit is °;

[0072] ΔT: Duration of tool face angle change, unit is second;

[0073] T1: Anti-disturbance threshold value of tool face angle change, unit is second.

[0074] The setting basis of the anti-disturbance threshold value T1 of the tool face angle change is to exclude the short-term drill stop caused by non-effective drill stop or drilling of the measuring instrument, improve the system reliability, and it can be preferably set to 10 seconds according to engineering experience, or it can also be set in advance according to user requirements and actual site conditions.

[0075] The drill stop working state is divided into an effective drill stop state and a long-term drill stop state, and the difference between the two methods mainly lies in the length of the cumulative time of the current drill stop.

[0076] The effective drill stop state refers to the time required to connect the next drill pipe after each drill pipe is drilled, and a data valid information needs to be marked during this time period.

[0077] The long-term drill stop state refers to the long-term drill stop caused by the shift change of the on-duty workers, drill rig failure, power outage for maintenance, etc.

[0078] (2) Identification of the drilling working state

[0079] When the change amount ΔΩ of the tool face angle satisfies formula (3) and the duration ΔT of this change satisfies formula (2), the measuring instrument and drill string in the current hole are in the drilling construction state, the system determines that the rotary drilling is currently in the drilling working state, and accumulatively records the online time Tz of this state.

[0080] ΔΩ = Ω i+1 -Ω i >0.5 (3)

[0081] Wherein:

[0082] △Ω: Tool face angle change amount, unit is °;

[0083] Ω i+1: Measured value of the tool face angle at the current sampling point, unit: °;

[0084] Ω i : Measured value of the tool face angle at the previous sampling point, unit: °;

[0085] T z : Duration of the drilling working state, unit: second.

[0086] The method for marking valid data and borehole depth in step 3 of the intelligent monitoring method for rotary drilling state based on geophysical exploration data in this embodiment is introduced below.

[0087] The inclinometer sensor involved in the present invention is implemented by a three-axis acceleration sensor, a three-axis magnetic induction sensor, and their power supply circuits and main control circuits. Among them, the azimuth angle is measured and calculated through the three-axis magnetic induction sensor based on the earth's magnetic field measurement and its related calculation chips, and the inclination angle and tool face angle are measured and calculated through the three-axis acceleration sensor and its related calculation chips. Therefore, only the drill tool attitude information data measured in the stationary state is valid data, but the data measured during the drilling process does not affect the identification of the drilling working state.

[0088] When in the drill stop working state, if the duration of the tool face angle change ΔT satisfies formula (4) and the time interval between the previous valid measurement point and the current drill stop state satisfies formula (5), it is considered that the measuring instrument is in an effective drill stop, and an effective measurement point position marking is required. The marking process is completed independently by the lower computer program; if the duration of the tool face angle change ΔT satisfies formula (6), it is considered that the measuring instrument is in a long-term drill stop state, and the number of long-term drill stops N and the cumulative long-term drill stop time T are recorded c .

[0089] T2 < ΔT < T3 (4)

[0090] T4 < ΔT t = T t(j+1) - T t(j) < T5 (5)

[0091] ΔT ≥ T6 (6)

[0092] Where:

[0093] T2: Lower threshold of the duration of the tool face angle change for the current effective drill stop, unit: second;

[0094] T3: Upper threshold of the duration of the tool face angle change for the current effective drill stop, unit: second;

[0095] ΔT t : Time change amount between two adjacent effective drill stop measurement points, unit: second;

[0096] T t(j+1) : Total cumulative elapsed time from the start of measurement to the current measurement point, in seconds;

[0097] T t(j) : Total cumulative elapsed time from the start of measurement to the previous measurement point, in seconds;

[0098] T4: Lower threshold of the time interval between two adjacent valid measurement points, in seconds;

[0099] T5: Upper threshold of the time interval between two adjacent valid measurement points, in seconds.

[0100] T6: Time threshold for determining the long-term drill stop state, in seconds.

[0101] The effective measurement point marking method described in the present invention refers to when the system identifies the current state as the effective drill stop state, starting from the lower threshold T2 of the duration of the change in the tool face angle during the current effective drill stop, offsetting 10 sampling points backward, taking this point as the effective measurement point, recording the sampling data corresponding to this point and the corresponding system time, increasing the drilling depth according to the length of the drill pipe used in the current drilling pre-input, and then storing the sampling data, the corresponding system time, and the drilling depth data together.

[0102] The determination of the lower threshold T2 and the upper threshold T3 of the duration of the change in the tool face angle during the current effective drill stop is based on the time when the current drill pipe drilling construction ends and the next drill pipe is clamped. Based on a large amount of statistical time analysis of previous projects, it is preferably taken as T2 = 25s and T3 = 45s, and can also be reset according to the actual engineering requirements on site. The determination of the lower threshold T4 of the time interval between two adjacent valid measurement points is based on the analysis of the original data collected from a large number of previous while-drilling tests. The main basis is the minimum time required for normal drilling of one drill pipe; the determination of the upper threshold T5 of the time interval between two adjacent valid measurement points is based on the analysis of the original data collected from a large number of previous while-drilling tests. The main basis is the maximum time required for normal drilling of one drill pipe; it is preferably taken as T4 = 150s and T5 = 300s. The time threshold T6 for determining the long-term drill stop state is generally preferably 900s, and it is considered that entering the long-term drill stop state if it exceeds this time limit.

[0103] In the method for intelligent monitoring of the rotary drilling state based on geophysical exploration data described in the present invention, in step four, the method for uploading valid data to the PC side is as follows:

[0104] After the current borehole construction drilling is completed, retract the drill, restart the measuring instrument, establish a wireless WiFi connection with the explosion-proof terminal outside the hole, and export the data including the duration T of the drill stop working state t 、the duration T of the drilling working state z, the number of long-time drilling stops N, and the cumulative long-time drilling stop time T c , the data file of valid sampling data and corresponding system time and borehole depth data, etc., is taken to the ground duty room by the on-duty personnel and uploaded to the computer PC side for technicians to view and further analyze.

[0105] This embodiment also protects an application method of a gamma logging-while-drilling instrument for rotary drilling. This method uses the intelligent monitoring method of rotary drilling state based on geophysical exploration data as described above to mark effective logging data and perform intelligent analysis of drilling state. And it also protects an intelligent borehole depth measurement method applicable to rotary drilling. This method uses the intelligent monitoring method of rotary drilling state based on geophysical exploration data as described above to mark effective data for borehole depth measurement.

[0106] The object to which the intelligent monitoring method of rotary drilling state based on geophysical exploration data of the present invention is applied is not limited to the logging-while-drilling inclinometer based on rotary drilling. Any logging-while-drilling instrument containing an inclinometer sensor module can be applicable.

[0107] The intelligent monitoring method of rotary drilling state based on geophysical exploration data of the present invention aims to solve the problems of missing, damaged or unrecognizable by other shift personnel of historical records due to the drilling site environment and random errors in recorded information in existing means, and can realize the intelligentization and paperless of the statistical method of rotary drilling construction state. However, it is not limited to only the intelligent statistics of drilling construction state, and is also used for the acquisition of each effective borehole trajectory information and the measurement of borehole depth during drilling. This method does not require additional operating costs, is not affected by the drilling site environment, and is not affected by human factors.

[0108] Now, take the logging-while-drilling inclinometer as an example for illustration. The logging-while-drilling inclinometer is a relatively common borehole trajectory measurement instrument, and its hardware composition includes an inclinometer sensor, a main control circuit based on an STM32 low-power microcontroller, an RS485 bus communication circuit, a wireless WiFi module, a battery pack and its intrinsically safe power supply circuit.

[0109] As Figure 1 shown is the implementation flow chart of an intelligent monitoring method of rotary drilling state based on geophysical exploration data disclosed in this embodiment.

[0110] First, power on the probe of the logging-while-drilling inclinometer, ensure that the measurement probe establishes a wireless connection with the explosion-proof terminal outside the hole, send configuration parameters such as engineering information and borehole information to the measurement probe, and start rotary drilling construction after completing the parameter configuration.

[0111] Then, according to the inclinometer data returned by the inclinometer sensor, which reflects the attitude information of the measurement instrument and the drill string, focus on the front-back comparison of the tool face angle data.

[0112] If the change amount of the tool face angle ΔΩ > the limit value of 0.5°, and the duration of this change ΔT > 10 s, then the measuring instrument determines that the current state is the drilling working state, the current measurement data is invalid inclinometry data, and continue with status monitoring, such as Figure 2 as shown.

[0113] If the change amount of the tool face angle ΔΩ < the limit value of 0.5°, and the duration of this change ΔT > 10 s, then the measuring instrument determines that the current state is the drill stop working state, and continue with status monitoring and online status time accumulation;

[0114] If the duration of the change satisfies 25 s < ΔT < 45 s, and the time change amount between two adjacent effective drill stop measurement points satisfies 150 s < ΔT t < 300 s, then it is determined that the current drill stop state is an effective drill stop, mark a set of effective measurement data, and the marking point is selected at the 10th sampling point before the start of the drill stop state. Each sampling point is 1 s. Therefore, select at the 35th s, so as to ensure that the measuring instrument is in a stable state and the inclinometry data is valid.

[0115] Continue with status monitoring and online status time accumulation;

[0116] If the duration of the change satisfies ΔT > 900 s, then the measuring instrument determines that it is currently in a long-term drill stop state, and accumulatively record the long-term drill stop time T c .

[0117] When the current borehole construction drilling is completed, retract the drill, restart the measuring instrument, make it establish a wireless WiFi connection with the explosion-proof terminal outside the hole, and export the data file containing the duration T of the drill stop working state t , the duration T of the drilling working state z , the number N of long-term drill stops, the accumulatively recorded long-term drill stop time T c , effective sampling data and the corresponding system time and borehole depth data and other information;

[0118] The on-duty personnel take it to the ground duty room and upload it to the computer PC side, and the technician checks and further analyzes it.

[0119] Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Technicians can implement the described functionality in different ways for each specific application, but such implementation decisions should not be construed as causing deviation from the scope of the present invention.

[0120] As can be seen from the above description, the method of this embodiment does not require additional operating costs, is not affected by the drill site environment, and is not affected by human factors. By automatically collecting and intelligently analyzing the geophysical exploration data that originally needs to be collected, after the drilling construction is completed, the analysis results can be exported to the explosion-proof terminal outside the hole to realize the statistics of the drilling construction status. This method has the advantages of intelligence, paperless, integration of collection and analysis, etc., and can also realize the digital measurement of the drilling depth.

[0121] Note that references in the specification to "one embodiment", "an embodiment", "example embodiment", "some embodiments", etc. indicate that the described embodiments may include specific features, structures, or characteristics, but each embodiment may not necessarily include the specific features, structures, or characteristics. Moreover, such phrases do not necessarily refer to the same embodiment. In addition, when a specific feature, structure, or characteristic is described in connection with an embodiment, whether or not explicitly described, implementing such a feature, structure, or characteristic in connection with other embodiments will be within the knowledge of those skilled in the art.

[0122] The foregoing description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent monitoring method for the rotary drilling state based on geophysical exploration data, characterized in that, Including: A geophysical prospecting data acquisition step for acquiring geophysical prospecting data during rotary drilling. The geophysical prospecting data at least includes dip angle, azimuth angle, and tool face angle; A drilling state judgment step for judging the current state of rotary drilling according to the change of the tool face angle and respectively recording the online time of the corresponding working state; A hole depth information determination step for marking valid geophysical prospecting data and accumulating the hole depth information according to the preset drill pipe based on the rotary drilling working state and the online time of this state; Among them, in the drilling state judgment step, When the change amount ΔΩ of the tool face angle satisfies formula (1) and the change duration ΔT satisfies formula (2), the measuring instrument and the drill string in the current hole are in a stationary state. The system determines that the rotary drilling is currently in a drilling stop working state and accumulatively records the online time T of the drilling stop working state t ; ΔΩ = Ω i+1 -Ω i ≤0.5 (1) ΔT>T1 (2) Wherein: ΔΩ: The change amount of the tool face angle, unit is °; Ω i+1 : Measured value of the tool face angle at the current sampling point, unit: °; Ω i : Tool face angle measurement value at the previous sampling point, unit: °; ΔT: The duration of the change of the tool face angle, unit is seconds; T1: The anti-disturbance threshold value of the change of the tool face angle, unit is seconds; Among them, in the drilling state judgment step, When the change amount ΔΩ of the tool face angle satisfies formula (3) and the change duration ΔT satisfies formula (2), the measuring instrument and the drill string in the current hole are in the drilling construction state, and the system determines that the rotary drilling is currently in the drilling working state, and accumulatively records the online time Tz of this state; ΔΩ = Ω i+1 -Ω i >0.5 (3) Wherein: △Ω: The change amount of the tool face angle, unit is °; Ω i+1 : Measured value of the tool face angle at the current sampling point, unit: °; Ω i : Tool face angle measurement value at the previous sampling point, unit: °; T z : The duration of the drilling working state, in seconds; Among them, in the hole depth information determination step, When in the drill stop working state, if the change duration ΔT of the tool face angle satisfies formula (4) and the interval time between the last effective measurement point and the current drill stop state satisfies formula (5), it is considered that the measuring instrument is in an effective drill stop, and an effective measurement point position marking is required; T2<ΔT<T3 (4) T4 < ΔT t = T t(j+1) - T t(j) < T5 (5) T2: The lower threshold of the change duration of the tool face angle for the current effective drill stop, unit is seconds; T3: The upper threshold of the change duration of the tool face angle for the current effective drill stop, unit is seconds; ΔT t : The time change between two adjacent valid drill-stop measurement points, in seconds; T t(j+1) : The total cumulative timing duration from the start of measurement to this measurement point, with the unit of seconds; T t(j) : The total cumulative elapsed time from the start of measurement to the previous measurement point, in seconds; T4: The lower threshold of the interval time between two adjacent effective measurement points, unit is seconds; T5: The upper threshold of the interval time between two adjacent effective measurement points, unit is seconds; Among them, in the hole depth information determination step, If the duration of the change in the tool facing angle ΔT satisfies formula (6), it is considered that the measuring instrument is in a long-term drill stop state, and the number of long-term drill stops N and the cumulative long-term drill stop time T are recorded c ; ΔT≥T6 (6).

2. The intelligent monitoring method for rotary drilling state based on geophysical prospecting data according to claim 1, characterized in that In the geophysical prospecting data acquisition step, the current attitude information of the drill string is output regularly by using the inclinometer sensor module according to the preset output frequency.

3. The intelligent monitoring method for the rotary drilling state based on geophysical exploration data according to claim 1, characterized in that, The effective measurement point position marking is to offset a number of sampling points backward starting from the lower threshold of the change duration of the tool face angle for the current effective drill stop as the effective measurement point.

4. The intelligent monitoring method for the rotary drilling state based on geophysical exploration data according to claim 1, wherein, It also includes: A data transmission back step for, after the drilling is completed, exporting the valid data after intelligent identification and analysis to the explosion-proof terminal outside the hole, displaying the data or taking it to the duty room and uploading it to the computer PC side.

5. The intelligent monitoring method for the rotary drilling state based on geophysical exploration data according to claim 4, characterized in that After the current borehole construction drilling is completed, withdraw the drill, restart the measuring instrument, establish a wireless WiFi connection with the explosion-proof terminal outside the hole, export a data file containing information such as the duration Tt of the drill stop working state, the duration Tz of the drilling working state, the number N of long-time drill stops, the accumulated long-time drill stop time, the valid sampling data, and the corresponding system time and borehole depth data, take it to the ground duty room by the on-duty personnel, and upload it to the computer PC side for the technician to view and further analyze.

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