Patent Grant
12084960
This application is a bypass continuation application of PCT application no.: PCT/CN2022/140303. This application claims priorities from PCT Application PCT/CN2022/140303, filed Dec. 20, 2022, and from Chinese patent application 202210398349.X filed Apr. 15, 2022, the contents of which are incorporated herein in the entirety by reference.
The present disclosure relates to the field of geological exploration technologies, and in particular, to a method for synchronizing azimuth detection data while drilling and a device for azimuth detection while drilling.
Logging while drilling (LWD) is a technology that measures petrophysical parameters of a surrounding formation in real time while a drill bit is drilling through the formation, and plays an increasingly important role in modern oil and gas exploration and development because of its advantages of more real data, more timely measurement, higher measurement precision, etc.
Conventional LWD instruments can realize detection of down-hole one-dimensional information, but can only obtain a total field curve and cannot be used for geosteering in complex formations. However, due to addition of an azimuth detection module to an instrument for azimuth detection while drilling, measurement results of the instrument for azimuth detection while drilling have azimuth characteristics, and through the rotation of a drilling tool, well circumference data is measured in real time and a two-dimensional image is obtained, thereby precisely locating a reservoir.
The azimuth detection module of the instrument for azimuth detection while drilling needs to acquire a tool face angle and corresponding detection data of the well circumference at the same time and has a control circuit which mainly includes two parts, i.e., a tool face angle measurement part and a detection signal acquisition part. However, it is difficult to achieve precise synchronization control as the two acquisition modules are independent of each other. If the precise control of azimuth detection cannot be achieved, it will lead to a location error in azimuth detection, and thus accurate information about the formation cannot be obtained.
Therefore, how to solve the above problems has become a technical problem urgently to be solved by those skilled in the art.
Objects of the present disclosure are to provide a method and device for synchronizing azimuth detection data while drilling, which at least can solve the above problems.
For solving the above problems, the present disclosure provides a method for synchronizing azimuth detection data while drilling. The method includes: starting, according to a command that measurement has been started sent by a tool face angle measurement module, by a control module, a timer to record a first time, and sending, by the control module, a detection signal acquisition starting command to a detection signal acquisition module;
In some embodiments, the method further includes: sending, by the control module, a measurement starting command to the tool face angle measurement module based on a received data acquisition command; and
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module and a communication protocol set between the control module and the detection signal acquisition module are the same; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart.
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module is different from a communication protocol set between the control module and the detection signal acquisition module; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart−Tran2+Tran1, where Tran1 denotes a time when the tool face angle, measurement module uploads the command that measurement has been started to the control module and decoding is performed, and Tran2 denotes a time when the detection signal acquisition module uploads the command that work has been started to the control module and decoding is performed.
In some embodiments, the deviation angle is recorded as θ, and satisfies a conditional formula: θ=ωt, where ω denotes an angular speed and t=Tdiff.
In some embodiments, the correcting the tool face angle measurement module based on the deviation angle includes:
A second aspect of embodiments of the present disclosure provides a device for azimuth detection while drilling, including a control module, a tool face angle measurement module and a detection signal acquisition module, wherein
In some embodiments, the control module sends a measurement starting command to the tool face angle measurement module based on a received data acquisition command; and the tool face angle measurement module performs a parameter configuration according to the measurement starting command, and sends the command that measurement has been started to the control module based on a configuration completion state.
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module and a communication protocol set between the control module and the detection signal acquisition module are the same; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart.
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module is different from a communication protocol set between the control module and the detection signal acquisition module; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart−Tran2+Tran1, where Tran1 denotes a time when the tool face angle measurement module uploads the command that measurement has been started to the control module and decoding is performed, and Tran2 denotes a time when the detection signal acquisition module uploads the command that work has been started to the control module and decoding is performed.
In the present disclosure, the control module starts, according to the command that measurement has been started sent by the tool face angle measurement module, the timer to record the first time, and sends the detection signal acquisition starting command to the detection signal acquisition module. The detection signal acquisition module performs the parameter configuration according to the detection signal acquisition starting command, and sends the command that work has been started to the control module based on the configuration completion state. The control module stops the timer and records the second time according to the command that work has been started. The deviation angle is calculated according to the time difference between the first time and the second time, and the tool face angle measurement module is corrected based on the deviation angle. According to the present disclosure, time recording (the first time and the second time) is triggered based on the commands, which can accurately record a work ending time of the tool face angle measurement module and a work ending time of the detection signal acquisition module. Thus, a time difference between the tool face angle measurement module and the detection signal acquisition module is accurately calculated and the function of correcting a deviation amount (the deviation angle calculated based on the time difference) in real time is achieved to improve the azimuth measurement precision, thereby improving the geosteering precision of while-drilling instruments.
In order to make the objects, technical solutions, and advantages of the present disclosure clearer, the present disclosure is described in further detail below with reference to specific embodiments and the accompanying drawings. It should be understood that the description is merely exemplary and is not intended to limit the scope of the present disclosure. Moreover, in the following description, the description of well-known structures and techniques is omitted to avoid unnecessarily confusing the concept of the present disclosure.
Schematic structural diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These drawings are not drawn to scale, and some details may be omitted for the purpose of clarity. Various regions, shapes, and the relative sizes and position relationships therebetween shown in the drawings are only illustrative. In practice, there may be deviations due to manufacturing tolerances or technical limitations. Moreover, those skilled in the art can design regions of different shapes, sizes and relative positions additionally according to actual needs.
Obviously, the embodiments described are some but not all embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments derived by a person of ordinary skill in the art without creative efforts shall fall within protection scope of the present disclosure.
In addition, the technical features involved in the different implementations of the present disclosure described below may be combined with one another as long as they do not conflict with one another.
The present disclosure will be described in more detail below with reference to the accompanying drawings. The same components are denoted by similar reference signs in the respective accompanying drawings. For the sake of clarity, various parts in the accompanying drawings are not drawn to scale.
The measurement precision of an instrument for azimuth detection while drilling is mainly determined by the tool face angle measurement precision, the detection signal acquisition precision, and the synchronization degree of the tool face angle measurement precision and the detection signal acquisition precision. With the rapid development of China's oil logging technology, there are increasing requirements for the precision of LWD instruments. Existing down-hole detection instruments can achieve the highest drilling speed of 300 r/nin, and the sector division precision has developed from original 4-sector precision to 8-sector precision, and then to 16-sector precision at present.
Under the requirements of high drilling speed and high precision, it is difficult to satisfy the down-hole detection precision requirements without synchronous processing of tool face angle measurement and detection signal acquisition or only with a synchronous processing method based on a fixed deviation time.
If the tool face angle measurement precision and the detection signal acquisition precision both satisfy the requirements, the down-hole instrument can achieve the highest drilling speed of 200 r/min, and the four-sector division precision (upper, lower, left, right) is used, that is, a rotation angle occupied by one sector is 90 degrees. Under the above conditions, an acquisition signal of this sector will completely deviate to other sectors only if a difference between a measurement starting time of a tool face angle and an acquisition starting time of a detection signal is greater than 75 ms. If the drilling speed increases to 300 r/min and the 16-sector division precision is used, that is, if the rotation angle occupied by one sector is 22.5 degrees, the deviation of signal acquisition data values in sectors can be completed as long as the difference between the measurement starting time of the tool face angle and the acquisition starting time of the detection signal is greater than 12.5 ms. If the synchronous correction of the starting times is not performed, it is prone to cause an azimuth data measurement deviation.
Most of existing correction schemes are correction methods based on a fixed deviation time: the difference between the measurement starting time of the tool face angle and the acquisition starting time of the detection signal is measured under laboratory conditions and recorded as a fixed value for correcting a sector deviation. This has the disadvantage that an impact of the surrounding environment (such as a temperature) on hardware is not considered, and the deviation cannot be corrected in real time.
In an embodiment of the present disclosure, referring to
S102, performing, by the detection signal acquisition module, parameter a configuration according to the detection signal acquisition starting command, and sending, by the detection signal acquisition module, a command that work has been started to the control module based on a configuration completion state;
S103, stopping the tinier and recording a second time by the control module according to the command that work has been started; and
S104, calculating a deviation angle according to a time difference between the first time and the second time, and correcting the tool face angle measurement module based on the deviation angle.
Further, the control module is respectively connected to the tool face angle measurement module and the detection signal acquisition module. Specifically, the control module is respectively connected to the tool face angle measurement module and the detection signal acquisition module via field buses. The field buses include CAN buses.
In the present disclosure, the control module starts, according to the command that measurement has been started sent by the tool face angle measurement module, the timer to record the first time, and sends the detection signal acquisition starting command to the detection signal acquisition module. The detection signal acquisition module performs a parameter configuration according to the detection signal acquisition starting command, and sends the command that work has been started to the control module based on the configuration completion state. The control module stops the timer and records the second time according to the command that work has been started. The deviation angle is calculated according to the time difference between the first time and the second time, and the tool face angle measurement module is corrected based on the deviation angle. According to the present disclosure, time recording (the first time and the second time) is triggered based on the commands, which can accurately record a work ending time of the tool face angle measurement module and a work ending time of the detection signal acquisition module. Thus, a time difference between the tool face angle measurement module and the detection signal acquisition module is accurately calculated and the function of correcting a deviation amount (the deviation angle calculated based on the time difference) in real time is achieved to improve the azimuth measurement precision, thereby improving the geosteering precision of while-drilling instruments.
In some embodiments, the method further includes: S105, sending, by the control module, a measurement starting command to the tool face angle measurement module based on a received data acquisition command; and
S106, performing, by the tool face angle measurement module, a parameter configuration according to the measurement starting command, and sending, by the tool face angle measurement module, the command that measurement has been started to the control module based on a configuration completion state.
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module and a communication protocol set between the control module and the detection signal acquisition module are the same; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart.
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module is different from a communication protocol set between the control module and the detection signal acquisition module; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart−Tran2+Tran1, where Tran1 denotes a time when the tool face angle measurement module uploads the command that measurement has been started to the control module and decoding is performed, and Tran2 denotes a time when the detection signal acquisition module uploads the command that work has been started to the control module and decoding is performed.
In some embodiments, the deviation angle is recorded as θ, and satisfies a conditional formula: 0=ωt, where ω denotes an angular speed and t=Tdiff.
In some embodiments, the correcting the tool face angle measurement module based on the deviation angle includes:
Referring to
In some embodiments, each of the electromagnetic transmitting board, the electromagnetic receiving board and the electromagnetic central control board transmits data and a command through a CAN bus. The electromagnetic receiving board includes the detection signal acquisition module, and the electromagnetic central control board includes the control module and the tool face angle measurement module.
Specifically, the device for azimuth detection while drilling provided by the present disclosure includes the tool face angle measurement module and the detection signal acquisition module. The detection signal acquisition module is configured to acquire signals for detecting formation boundary information and lithology, such as an electromagnetic wave receiving signal and a gamma receiving signal.
Further, the method for synchronizing azimuth detection data while drilling of the present disclosure includes the followings.
In the present disclosure, the control module starts, according to the command that measurement has been started sent by the tool face angle measurement module, the timer to record the first time, and sends the detection signal acquisition starting command to the detection signal acquisition module. The detection signal acquisition module performs the parameter configuration according to the detection signal acquisition starting command, and sends the command that work has been started to the control module based on the configuration completion state. The control module stops the timer and records the second time according to the command that work has been started. The deviation angle is calculated according to the time difference between the first time and the second time, and the tool face angle measurement module is corrected based on the deviation angle. According to the present disclosure, time recording (the first time and the second time) is triggered based on the commands, which can accurately record a work ending time of the tool face angle measurement module and a work ending time of the detection signal acquisition module. Thus, a time difference between the tool face angle measurement module and the detection signal acquisition module is accurately calculated and the function of correcting a deviation amount (the deviation angle calculated based on the time difference) in real time is achieved to improve the azimuth measurement precision, thereby improving the geosteering precision of while-drilling instruments.
A second aspect of embodiments of the present disclosure provides a device for azimuth detection while-drilling. The device includes a control module, a tool face angle measurement module and a detection signal acquisition module.
The control module starts, according to a command that measurement has been started sent by the tool face angle measurement module, a timer to record a first time, and sends a detection signal acquisition starting command to the detection signal acquisition module.
The detection signal acquisition module performs a parameter configuration according to the detection signal acquisition starting command, and sends a command that work has been started to the control module based on a configuration completion state.
The control module stops the timer and records a second time according to the command that work has been started.
A deviation angle is calculated according to a time difference between the first time and the second time, and the tool face angle measurement module is corrected based on the deviation angle.
In the present disclosure, the control module starts, according to the command that measurement has been started sent by the tool face angle measurement module, the timer to record the first time, and sends the detection signal acquisition starting command to the detection signal acquisition module. The detection signal acquisition module performs the parameter configuration according to the detection signal acquisition starting command, and sends the command that work has been started to the control module based on the configuration completion state. The control module stops the timer and records the second time according to the command that work has been started. The deviation angle is calculated according to the time difference between the first time and the second time, and the tool face angle measurement module is corrected based on the deviation angle. According to the present disclosure, time recording (the first time and the second time) is triggered based on the commands, which can accurately record a work ending time of the tool face angle measurement module and a work ending time of the detection signal acquisition module. Thus, a time difference between the tool face angle measurement module and the detection signal acquisition module is accurately calculated and the function of correcting a deviation amount (the deviation angle calculated based on the time difference) in real time is achieved to improve the azimuth measurement precision, thereby improving the geosteering precision of while-drilling instruments.
In some embodiments, the control module sends a measurement starting command to the tool face angle measurement module based on a received data acquisition command; and the tool face angle measurement module performs a parameter configuration according to the measurement starting command, and sends the command that measurement has been started to the control module based on a configuration completion state.
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module and a communication protocol set between the control module and the detection signal acquisition module are the same; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart.
In some embodiments, the first time is recorded as Tstart and the second time is recorded as Tend; a communication protocol set between the control module and the tool face angle measurement module is different from a communication protocol set between the control module and the detection signal acquisition module; and the time difference satisfies a conditional formula: Tdiff=Tend−Tstart−Tran2+Tran1, where Tran1 denotes a time when the tool face angle measurement module uploads the command that measurement has been started to the control module and decoding is performed, and Tran2 denotes a time when the detection signal acquisition module uploads the command that work has been started to the control module and decoding is performed.
In an embodiment, in the present disclosure, the control module in an electromagnetic central control board is connected to the detection signal acquisition module and the tool face angle measurement module through CAN buses. ID of the control module in the electromagnetic central control board is set as 0x00, ID of the tool face angle measurement module is set as 0x01, and ID of the detection signal acquisition module is set as 0x02. The detection signal acquisition module and the tool face angle measurement module transmit commands and data to a target ID (i.e., the control module in the electromagnetic central control board) through CAN buses.
Specific steps of a method for synchronizing detection signal acquisition data and tool face angle measurement data are as follows.
A starting time difference between a signal receiving module and an azimuth acquisition module is Tdiff=Cstart−Mstart, and
T1=Tend−Tstart=Tdiff−Ttran1+Ttran2.
In the present disclosure, the control module starts, according to the command that measurement has been started sent by the tool face angle measurement module, the timer to record the first time, and sends the detection signal acquisition starting command to the detection signal acquisition module. The detection signal acquisition module performs a parameter configuration according to the detection signal acquisition starting command, and sends the command that work has been started to the control module based on the configuration completion state. The control module stops the timer and records the second time according to the command that work has been started. The deviation angle is calculated according to the time difference between the first time and the second time, and the tool face angle measurement module is corrected based on the deviation angle. According to the present disclosure, time recording (the first time and the second time) is triggered based on the commands, which can accurately record a work ending time of the tool face angle measurement module and a work ending time of the detection signal acquisition module. Thus, a time difference between the tool face angle measurement module and the detection signal acquisition module is accurately calculated and the function of correcting a deviation amount (the deviation angle calculated based on the time difference) in real time is achieved to improve the azimuth measurement precision, thereby improving the geosteering precision of while-drilling instruments.
Compared with a correction method based on a fixed value, the synchronization method used in the present disclosure can precisely complete the time-shared control of two independent modules (the tool face angle measurement module and the detection signal acquisition module) in a measurement process, can also complete the precise measurement of a starting time difference of the two modules, and can achieve real-time data synchronization in combination with a current instantaneous rotating speed, thereby providing a better solution for high-precision measurement of the device for azimuth detection while drilling.
The present disclosure has been described with reference to the embodiments of the present disclosure. However, these embodiments are merely for the purpose of illustration and are not intended to limit the scope of the present disclosure. The scope of the present disclosure is subject to the appended claims and equivalents thereof. Those skilled in the art can make various replacements and modifications without departing from the scope of the present disclosure and these replacements and modifications should fall within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202210398349.X | Apr 2022 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/140303 | 12/20/2022 | WO |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2023/197663 | 10/19/2023 | WO | A |
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