CN114151065B - Device and method for controlling switching mode of imaging logging instrument while drilling - Google Patents
Device and method for controlling switching mode of imaging logging instrument while drilling Download PDFInfo
- Publication number
- CN114151065B CN114151065B CN202010829063.3A CN202010829063A CN114151065B CN 114151065 B CN114151065 B CN 114151065B CN 202010829063 A CN202010829063 A CN 202010829063A CN 114151065 B CN114151065 B CN 114151065B
- Authority
- CN
- China
- Prior art keywords
- drilling
- instrument
- imaging logging
- imaging
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 213
- 238000003384 imaging method Methods 0.000 title claims abstract description 201
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000012545 processing Methods 0.000 claims abstract description 44
- 238000007781 pre-processing Methods 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 6
- 239000003550 marker Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 18
- 238000005259 measurement Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005358 geomagnetic field Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013075 data extraction Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a device and a method for controlling a mode switching of an imaging logging instrument while drilling, wherein the device comprises the following components: the system comprises an inertial sensor, a timer and a data processing module, wherein the inertial sensor is used for acquiring operation data of the imaging logging while drilling instrument during operation, the timer is used for synchronously measuring the operation time of the imaging logging while drilling instrument, the data processing module is used for preprocessing the operation data and the operation time signal, calculating the rotation speed of the imaging logging while drilling instrument according to the preprocessed operation data and the operation time, and generating control signals for controlling the imaging logging while drilling instrument to operate in different working modes based on the rotation speed. The technical scheme of the embodiment of the invention is suitable for wellbores with different inclinations, effectively ensures that the imaging instrument while drilling in the logging process has the capability of switching different working modes according to the state of the imaging instrument while drilling, has simple structure and high operation efficiency, reasonably reduces the signal acquisition quantity of the imaging instrument while drilling on the premise of not influencing the logging accuracy, reduces the power consumption during operation and prolongs the service life.
Description
Technical Field
The invention relates to the technical field of oil and gas exploration and development, in particular to a device and a method for controlling a switching mode of an imaging logging instrument while drilling.
Background
Measurement while drilling/logging technology is an important means for identifying complex oil and gas reservoirs such as cracks, thin layers, low-hole low permeability and the like in the development of highly deviated wells and horizontal wells. Conventional logging while drilling techniques reflect formation information by measuring a profile of formation parameter properties with depth, the information measured at each point being a macroscopic response at that location. The design of the imaging logging instrument while drilling considers the complexity and the heterogeneity of the stratum, utilizes the sensor array scanning or the rotary scanning measurement to acquire a large amount of stratum information along the longitudinal direction, the radial direction or the circumferential direction of the well bore, and obtains a two-dimensional image of the well wall or a three-dimensional image within a certain detection depth around the well bore through an image processing technology after transmitting the stratum information to the well. This is more accurate, intuitive and convenient than previous curve representation methods.
The imaging logging while drilling instrument is connected in the drilling tool assembly, stratum and instrument information need to be measured through a large number of scanning operations during working, the working time of the imaging logging while drilling instrument is longer than that of the cable instrument, and the imaging logging while drilling instrument does not only operate in a specific purpose layer or an environment with imaging requirements. For example, the instrument is being lowered from the wellhead down with the drilling tool, which is often slow, and if the drilling tool is not in a rotating state, the instrument while drilling is always in a normal running state, but the scanning of the well bore cannot be effectively realized, resources are wasted, a large amount of invalid data is acquired, and the service life of the instrument while drilling is shortened.
In the prior art, a method for measuring the rotation speed and direction of a downhole drilling tool (drill bit) and a short joint are provided, two groups of flux gate assemblies are arranged on the short joint, and are respectively positioned on different axial vertical lines in a 90-degree radian area of a rotation surface, and the rotation speed of an instrument is measured by using a geomagnetic field. This solution suffers from the following disadvantages: (1) The 2-path sensor is used, and the scheme of a measuring circuit is complex: (2) The difference between the two sensors is not easy to correct, and the accuracy of the operation result is affected; (3) The geomagnetic field is adopted to measure the north and south of the east and the west, which is only suitable for the condition of a vertical well, and can not be applied to a horizontal well.
Disclosure of Invention
To solve the above problems, the present invention provides an apparatus for controlling a switching mode of an imaging logging while drilling instrument, in one embodiment, the apparatus includes: an inertial sensor disposed on the imaging logging while drilling instrument configured to acquire operational data of the imaging logging while drilling instrument while operating;
a timer configured to synchronously measure a run time of the while-drilling imaging logging instrument;
the data processing module is configured to preprocess the acquired operation data and the operation time, calculate the rotation speed of the imaging logging while drilling instrument according to the preprocessed operation data and the operation time, and generate corresponding control signals based on the rotation speed of the imaging logging while drilling instrument so as to control the imaging logging while drilling instrument to operate in different working modes.
In one embodiment, the data processing module comprises:
the preprocessing unit is configured to acquire the operation data electric signals and the operation time electric signals, and an analog-to-digital conversion circuit is adopted to respectively convert the operation data electric signals and the operation time electric signals into corresponding digital signals;
the operation control unit acquires the running time electric signal from the preprocessing unit through the SPI bus, converts the running time electric signal into a corresponding digital signal, calculates the rotating speed of the imaging logging instrument while drilling based on the digital signal, and generates a corresponding control signal and a mode zone bit according to the rotating speed so as to control the imaging logging instrument while drilling to run in different working modes.
In one embodiment, the inertial sensor adopts a gyroscope, and the operation control unit of the data processing module calculates the rotation speed of the imaging logging while drilling instrument according to the following formula:
wherein,r is the rotation speed of the imaging logging instrument while drilling, the unit is the rotation/second, t is the running time of the imaging logging instrument while drilling, the unit is the second, and Ga is the time of the inertial sensor at tThe internal rotation angle Gs is a reference value when M data points are acquired in the static state of the inertial sensor, gr is a ratio coefficient when the inertial sensor rotates for L weeks in the rotating state, vgsn is the reading of the inertial sensor at the time n, and Vgst is the reading of the inertial sensor at the time t.
In one embodiment, the preprocessing unit acquires the operation data electric signal and the operation time electric signal according to a set acquisition period through an FPGA chip.
In one embodiment, the arithmetic control unit of the data processing module performs the following operations:
comparing the rotating speed of the imaging logging while drilling instrument with a set rotating speed threshold R_Lowest, and if the rotating speed of the imaging logging while drilling instrument is greater than R_Lowest, generating a corresponding first control signal; otherwise, generating a corresponding second control signal;
generating a first mode zone bit and a second mode zone bit which correspond to the first control signal and the second control signal respectively;
controlling the logging while drilling imaging logging instrument to enter a resistivity/gamma/neutron/density imaging mode through the first mode zone bit, calculating a tool face, and sampling according to a set first density; controlling the imaging logging while drilling instrument to enter a total resistivity or gamma mode through the second mode marker bit, not imaging, and sampling according to a set second density;
wherein, the rotating speed threshold R_Lowest is more than or equal to 1/x, and x is the period of the data processing module for acquiring the operation data and the operation time; the first density and the second density are set according to configuration parameters of the imaging logging while drilling instrument and sampling requirements, and the first density is greater than the second density.
In one embodiment, the data processing module is further configured to:
and transmitting the calculated rotating speed data to a wireless while-drilling monitoring system and/or a while-drilling detection system corresponding to the while-drilling imaging logging instrument through an RS-485 bus, and providing data support for operation monitoring and management of the while-drilling imaging logging instrument.
In one embodiment, the inertial sensor employs a MEMS gyroscope.
Based on other aspects of any one or more of the above embodiments, the present invention further provides a method of controlling a switching mode of an imaging logging while drilling instrument, the method comprising:
s1, acquiring operation data of an imaging logging while drilling instrument by using an inertial sensor arranged on the imaging logging while drilling instrument;
step S2, synchronously measuring the running time of the imaging logging instrument while drilling through a timer;
and S3, preprocessing the received operation data and the operation time by adopting a data processing module, calculating the rotation speed of the imaging logging instrument while drilling according to the preprocessed operation data and the operation time, and generating corresponding control signals based on the rotation speed of the imaging logging instrument while drilling to control the imaging logging instrument while drilling to operate in different working modes.
In one embodiment, in step S3, the rotational speed of the imaging logging while drilling instrument is calculated according to the following formula:
wherein R is the rotation speed of the imaging logging instrument while drilling, the unit is rotation/second, and t i For the operation time of the inertial sensor obtained by acquisition, the unit is seconds, n i K is the scale factor of the inertial sensor for the acquired rotational scale number of the inertial sensor.
Further, in one embodiment, the step S3 includes:
comparing the rotating speed of the imaging logging while drilling instrument with a set rotating speed threshold R_Lowest, and if the rotating speed of the imaging logging while drilling instrument is greater than R_Lowest, generating a corresponding first control signal; otherwise, generating a corresponding second control signal;
generating a first mode zone bit and a second mode zone bit which correspond to the first control signal and the second control signal respectively;
controlling the logging while drilling imaging logging instrument to enter a resistivity/gamma/neutron/density imaging mode through the first mode zone bit, calculating a tool face, and sampling according to a set first density; controlling the imaging logging while drilling instrument to enter a total resistivity or gamma mode through the second mode marker bit, not imaging, and sampling according to a set second density;
wherein, the rotating speed threshold R_Lowest is more than or equal to 1/x, and x is the period of the data processing module for acquiring the operation data and the operation time; the first density and the second density are set according to configuration parameters of the imaging logging while drilling instrument and sampling requirements, and the first density is greater than the second density.
Compared with the closest prior art, the invention has the following beneficial effects:
according to the device and the method for controlling the switching mode of the imaging logging instrument while drilling, provided by the invention, the running data of the imaging logging instrument while drilling during working is obtained through the inertial sensor, so that the accuracy of basic data is ensured, and meanwhile, the application range of the device is increased, so that the device can be suitable for wellbore environments with different inclinations; the data processing module is used for preprocessing acquired data, and providing assistance for the reliable operation of a data calculation process while improving efficiency through efficient transmission, and generating control signals for controlling the imaging logging instrument while drilling to operate in different working modes based on calculated rotation speed data, so that the imaging instrument while drilling has the capability of switching different working modes according to the state of the imaging instrument while drilling, the signal acquisition quantity of the imaging instrument while drilling is effectively reduced, the power consumption is reduced, the service life is prolonged, and the optimization of the well testing detection process and the automatic development of oil and gas exploration engineering are facilitated on the premise that the logging accuracy is not influenced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention, without limitation to the invention. In the drawings:
FIG. 1 is a schematic diagram of an apparatus for controlling a switching mode of an imaging logging while drilling instrument according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of an apparatus for controlling the switching mode of an imaging logging while drilling instrument in accordance with an embodiment of the present invention
FIG. 3 is a schematic illustration of an apparatus for controlling the switching mode of an imaging logging while drilling instrument in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of the operation of an FPGA chip of a device for controlling the switching mode of an imaging logging while drilling instrument to acquire data in an embodiment of the present invention;
FIG. 5 is a flow chart of an instrument while drilling selection mode of an apparatus for controlling a switching mode of an imaging logging while drilling instrument in accordance with an embodiment of the present invention;
FIG. 6 is a schematic illustration of an apparatus for controlling the switching mode of an imaging logging while drilling instrument in accordance with another embodiment of the present invention;
FIG. 7 is a flow chart of a method of controlling a switching mode of an imaging logging while drilling instrument in accordance with an embodiment of the present invention.
Detailed Description
The following will explain the embodiments of the present invention in detail with reference to the drawings and examples, so that the practitioner of the present invention can fully understand how to apply the technical means to solve the technical problems, achieve the implementation process of the technical effects, and implement the present invention according to the implementation process. It should be noted that, as long as no conflict is formed, each embodiment of the present invention and each feature of each embodiment may be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
Measurement while drilling/logging technology is an important means for identifying complex oil and gas reservoirs such as cracks, thin layers, low-hole low permeability and the like in the development of highly deviated wells and horizontal wells. Conventional logging while drilling techniques reflect formation information by measuring a profile of formation parameter properties with depth, the information measured at each point being a macroscopic response at that location. The design of the imaging logging instrument while drilling considers the complexity and the heterogeneity of the stratum, utilizes the sensor array scanning or the rotary scanning measurement to acquire a large amount of stratum information along the longitudinal direction, the radial direction or the circumferential direction of the well bore, and obtains a two-dimensional image of the well wall or a three-dimensional image within a certain detection depth around the well bore through an image processing technology after transmitting the stratum information to the well. This is more accurate, intuitive and convenient than previous curve representation methods.
The imaging logging while drilling instrument is connected in the drilling tool assembly, stratum and instrument information need to be measured through a large number of scanning operations during working, the working time of the imaging logging while drilling instrument is longer than that of the cable instrument, and the imaging logging while drilling instrument does not only operate in a specific purpose layer or an environment with imaging requirements. For example, the instrument is being lowered from the wellhead down with the drilling tool, which is often slow, and if the drilling tool is not in a rotating state, the instrument while drilling is always in a normal running state, but the scanning of the well bore cannot be effectively realized, resources are wasted, a large amount of invalid data is acquired, and the service life of the instrument while drilling is shortened.
In the prior art (200710188552X), a method for measuring the rotation speed and direction of a downhole drilling tool (drill bit) and a short section are provided, two groups of fluxgate assemblies are arranged on the short section and are respectively positioned on different axial vertical lines in a 90-degree radian area of a rotation surface, and the rotation speed of a geomagnetic field measuring instrument is utilized. This solution suffers from the following disadvantages: (1) The 2-path sensor is used, and the scheme of a measuring circuit is complex: (2) The difference between the two sensors is not easy to correct, and the accuracy of the operation result is affected; (3) The geomagnetic field is adopted to measure the north and south of the east and the west, which is only suitable for the condition of a vertical well, and can not be applied to a horizontal well.
In order to solve the problems, the invention provides a device and a method for controlling the switching mode of an imaging logging instrument while drilling, and the technical scheme of the embodiment of the invention can rapidly and accurately judge the motion (rotation) state of the imaging logging instrument while drilling through an inertial sensor, further determine the working mode suitable for the current working condition, realize the automatic switching of the working mode of the imaging logging instrument while drilling, and realize the automatic switching of the working mode of the imaging logging instrument while drilling. Various embodiments of the present invention are described below with reference to the accompanying drawings.
Example 1
Fig. 1 is a schematic structural diagram of an apparatus for controlling a switching mode of an imaging logging while drilling instrument according to an embodiment of the present invention, and referring to fig. 1, the apparatus includes:
an inertial sensor disposed on the imaging logging while drilling instrument configured to acquire operational data of the imaging logging while drilling instrument while operating;
a timer (RTC) configured to synchronously measure a run time of the while-drilling imaging logging instrument;
the data processing module is configured to preprocess the acquired operation data and the operation time, calculate the rotation speed of the imaging logging while drilling instrument according to the preprocessed operation data and the operation time, and generate corresponding control signals based on the rotation speed of the imaging logging while drilling instrument so as to control the imaging logging while drilling instrument to operate in different working modes.
In an embodiment, the inertial sensor adopts a gyroscope, fig. 2 shows a working schematic diagram of an apparatus for controlling a switching mode of the logging while drilling imaging apparatus in this embodiment, as shown in fig. 2, the gyroscope needs to be initialized before being started, in practical application, in this step, a gyroscope counter is usually required to be cleared, and after confirming that the initial state of the gyroscope is correct, a data receiving enable of a corresponding data processing unit related structure, such as a data receiving enable of an FPGA unit, is started; and after the gyroscope is started, continuously collecting the operation data of the imaging logging instrument while drilling, and providing data support for subsequent data processing and calculation.
As shown in fig. 2, in practical application, when the imaging logging while drilling instrument starts to operate, the imaging logging while drilling instrument temporarily maintains a high-speed logging mode, so that key logging information is prevented from being missed in the early stage of logging, after the imaging logging while drilling instrument starts to operate, subsequent operation is continuously performed, and operation data of the imaging logging while drilling instrument during operation are obtained through an inertial sensor; synchronously measuring the running time of the imaging logging while drilling instrument by a timer (RTC); and further, the data processing module is used for preprocessing the acquired operation data and the operation time, calculating the rotation speed of the imaging logging while drilling instrument according to the preprocessed operation data and the operation time, and generating corresponding control signals based on the rotation speed of the imaging logging while drilling instrument so as to control the imaging logging while drilling instrument to operate in different working modes.
FIG. 3 is a schematic diagram of an apparatus for controlling a switching mode of an imaging logging while drilling instrument according to an embodiment of the present invention, as shown in FIG. 3, in one embodiment, the data processing module includes:
and the preprocessing unit is configured to acquire the operation data electric signal and the operation time electric signal, and respectively convert the operation data electric signal and the operation time electric signal into corresponding digital signals by adopting an ADC analog-to-digital conversion circuit. In general, the inertial sensor is started and the timer is started simultaneously with the operation state of the while-drilling instrument, so that the obtained operation data and operation time signals are strictly corresponding.
The operation control unit acquires the running time electric signal from the preprocessing unit through the SPI bus, converts the running time electric signal into a corresponding digital signal, calculates the rotating speed of the imaging logging instrument while drilling based on the digital signal, and generates a corresponding control signal and a mode zone bit according to the rotating speed so as to control the imaging logging instrument while drilling to run in different working modes.
In one embodiment, the apparatus further comprises: the crystal oscillator is used for providing an accurate clock reference for the device, guaranteeing to acquire accurate instrument running time and providing data support for acquiring accurate instrument rotating speed.
And the watchdog circuit is configured to control the device to restart when the program of the device runs or falls into a dead loop, avoid data abnormality or detection error caused by the program running, protect the device and reduce the occurrence probability of the detection abnormality.
And a power supply for powering the structures and circuits in the device for controlling the mode switching of the imaging logging while drilling instrument.
In practical applications, the rotation speed detection of the downhole while-drilling instrument is different from that of the measurement equipment on the ground, and the sensor for performing the detection needs to rotate synchronously with the instrument (drill collar). The embodiment of the invention adopts a motion inertia device to obtain the operation data of the underground while-drilling instrument according to the rotation of the earth.
Specifically, in an alternative embodiment, the inertial sensor employs a MEMS gyroscope. MEMS (Micro Electro Mechanical systems) micromechanical gyroscope is small in structure, integrates a digital interface, directly outputs a digital signal of angular velocity, is flexible in design, is beneficial to reducing the complexity of the structure of the device, and improves the detection efficiency.
In an alternative embodiment, the preprocessing unit of the data processing module acquires the operation data electric signal and the operation time electric signal according to a set acquisition period through an FPGA chip. Wherein the acquisition period x is set according to the setting parameters of the inertial sensor. For example, retrieving a set of data (packets) every 4 seconds. Fig. 4 shows an operation schematic diagram of the processing unit acquiring data through the FPGA chip, as shown in fig. 4, after the data reception of the FPGA unit is turned on, the receiving flag bit of the FPGA chip is changed from 0 to 1, which indicates that the receiving function is turned on at this time, and when in practical application, the operation of determining whether the FPGA is effective to receive data is further included, specifically, the setting state received by the FPGA is read by the singlechip, whether the receiving flag bit of the FPGA is effective is determined, and the reading operation and the rechecking are performed on the receiving flag bit of the FPGA.
Further, decoding and converting formally received data to obtain digital signal data corresponding to a gyroscope output voltage signal, counting the number of received data packets in real time in the receiving process, controlling the number of data packets received once by combining the set number of data packets, closing the receiving if the number of the data packets reaches the set number of the data packets, and otherwise, re-executing the operation to continue receiving the data packets, wherein the setting can avoid overlarge data volume of single processing and influence on logging efficiency;
in addition, it should be noted that, in this step, the number of real-time statistics data packets can also determine whether the data reception is overtime, and if the data return is incomplete (for example, the number of packets is small) in the specified time, the overtime is considered to be required to jump out of the acquisition cycle, so as to avoid waiting for a dead cycle in the following. In practical application, after the FPGA receives the data effectively every time, the clock is set for counting down (10 ms) at the same time, so that the accuracy of the data receiving overtime judgment result can be improved.
In one embodiment, the arithmetic control unit of the data processing module calculates the rotational speed of the imaging logging while drilling instrument according to the following formula:
wherein,r is the rotation speed of the imaging logging instrument while drilling, t is the running time of the imaging logging instrument while drilling, ga is the angle of the inertial sensor rotating in t time, gs is the reference value when M data points are collected under the static state of the inertial sensor, gr is the ratio coefficient when the inertial sensor rotates for L weeks under the rotating state of the inertial sensor, vgsn is the reading of the inertial sensor at n time, vgst is the angle measured after the reading of a reading gyroscope of the inertial sensor at t time is scaled, the calculation range can be selected according to the angle Ga, for example, the average rotation speed is calculated by selecting 2 weeks of data, and the divided time is 2 weeks.
In the embodiment, the rotation speed of the imaging logging instrument while drilling is acquired by adopting the inertial sensor gyroscope, the imaging logging instrument is applicable to wellbores with various inclinations, and the accuracy of rotation speed data can be effectively ensured.
Further, a suitable operation mode of the imaging logging while drilling instrument is determined by a data processing module of the device according to the rotational speed, and therefore, in one embodiment, an arithmetic control unit of the data processing module performs the following operations:
comparing the rotating speed of the imaging logging while drilling instrument with a set rotating speed threshold R_Lowest, and if the rotating speed of the imaging logging while drilling instrument is greater than R_Lowest, generating a corresponding first control signal; otherwise, generating a corresponding second control signal.
Generating a first mode zone bit and a second mode zone bit which correspond to the first control signal and the second control signal respectively; wherein the mode flag bit represents a corresponding logging mode suitable for the imaging logging while drilling instrument.
Controlling the logging while drilling imaging logging instrument to enter a resistivity/gamma/neutron/density imaging mode through the first mode zone bit, calculating a tool face, and sampling according to a set first density; and controlling the imaging logging instrument while drilling to enter a total resistivity or gamma mode through the first mode zone bit, not imaging, sampling according to a set first density, wherein in the mode, the magnetometer and the accelerometer are required to be connected and operated, and if the imaging logging instrument while drilling is in the second mode zone bit at the last moment, the magnetometer and the accelerometer are required to be connected.
Specifically, in practical application, in a typical corresponding drilling process (except make-up), at this time, the rotation speed of the imaging logging while drilling instrument is greater than r_lowest, the device controls the imaging logging while drilling instrument to operate through the first mode mark, there is a need for imaging, the imaging logging while drilling instrument enters a resistivity/gamma/neutron/density imaging mode, high-power-consumption work is performed, a tool surface is calculated, a time sequence signal is controlled to perform high-speed sampling of resistivity data, and multiple groups of data, such as 128-sector data, are acquired. And the measurement and calculation of the tool face are performed by combining running direction data of the while-drilling instrument acquired by the magnetometer and the accelerometer.
After entering the imaging mode, the magnetic north orientation determination operation is performed before gating the magnetometer, and the magnetometer data is analyzed to determine the 0 origin coordinates of the imaging data. In addition, the method also comprises the operation of dividing the imaging resistivity sector before the resistivity data is sampled at a high speed and the plurality of groups of data of the sector are acquired.
In a typical drilling mode, at the moment, the rotating speed of the imaging logging instrument while drilling is less than or equal to R_Lowest, the device controls the imaging logging instrument while drilling to operate through a second mode mark, the imaging logging instrument enters a total resistivity or gamma mode, imaging is not performed, a control time sequence signal is used for carrying out low-density sampling on resistivity data, the power consumption is low, the single working time and the service life of the instrument are prolonged, in the mode, a magnetometer and an accelerometer are not connected to operate, and if the imaging logging instrument while drilling at the last moment is a first mode mark bit, the magnetometer and the accelerometer are required to be disconnected.
The first density and the second density are set according to configuration parameters of the imaging logging instrument while drilling and sampling requirements, and the first density is larger than the second density. The rotating speed threshold R_Lowest is more than or equal to 1/x, and x is a period for acquiring operation data and operation time for a data processing module; this ensures that x seconds can acquire data for a complete 360 ° revolution of the borehole, otherwise the measured borehole is incomplete and cannot be sector allocated, for example, when the acquisition period is set to 4s (which may be done when other data is measured but the last 1 set of (packet) data returned is done at 4 s), the corresponding minimum rotation speed should be 1/4=0.25 rpm, and if the measurement time is to be shortened, the data can be correspondingly adjusted, for example, 1s is measured, corresponding to 1 rpm, otherwise 1s cannot be rotated for 1 week.
Typically the rotational speed is higher than r_lowest, where it is optional to use how many of the gyroscope counts to calculate. If all counts are used, this is the average rotational speed. The number of turns is r_lowest, which is several times the current rotation speed, for example, the rotation speed r=2×r_lowest, and then 2 turns, in some cases, the number of turns is too high, that is, the average rotation speed is always obtained.
In the field of oil and gas well exploration, the rotational speed data of the logging while drilling instrument is also one of important monitoring objects in the system operation process, and can reflect the construction state of the well testing development process, so the data processing module is further configured to:
and transmitting the calculated rotating speed data to a wireless while drilling monitoring system (MWD) and/or an while drilling detection system (EM-MWD) corresponding to the while drilling imaging logging instrument through an RS-485 bus, and providing data support for operation monitoring and management of the while drilling imaging logging instrument. Specifically, an arithmetic control unit (ARM) of the data processing module takes the rotating speed of the imaging logging instrument while drilling as an output data zone bit to provide identification for later data extraction and processing, for example, the rotating speed is recorded in final data, and each time corresponds to one group of data and instrument rotating speed.
Further, considering that in actual working conditions, the logging while drilling instrument is possibly not well adapted to various conditions in the development process only through the two working modes, and the lowest power consumption of the imaging logging while drilling instrument cannot be ensured, the embodiment of the invention provides the following optional means:
dividing a plurality of reasonable operating modes, e.g., a 001 static measurement mode, which generally corresponds to a process of logging through a well of an imaging logging while drilling instrument, in combination with historical operating data and configuration parameters of the imaging logging while drilling instrument; 002 dynamic imaging measurement mode, which generally corresponds to the process of high resolution scanning imaging of the imaging logging instrument while drilling, 003 represents directional measurement mode while drilling, which corresponds to the process of low resolution azimuth scanning of the imaging logging instrument while drilling, then a professional staff sets a plurality of different rotational speed thresholds corresponding to different working states according to the types of the modes, and the acquired rotational speed data are compared with the rotational speed thresholds to determine the suitable operation mode of the imaging logging instrument while drilling. When the method is applied to the actual working condition, after the instrument is electrified and started, the process zone bit is inquired, when the effective process zone bit is determined to be received, different process service functions are called according to a preset process zone corresponding table, different function modes are entered, and each function code is executed, as shown in fig. 5.
Further, in one embodiment, the data acquired by the magnetometer and the accelerometer are used as the basis for determining the real-time running state of the imaging logging instrument while drilling, that is, the data processing module acquires the data acquired by the inertial sensor and simultaneously acquires the data acquired by the magnetometer and the accelerometer, and as shown in fig. 6, whether the inertial sensor has obvious abnormal data or not is checked according to the set judging rule, so that detection errors caused by the abnormality of the inertial sensor can be timely controlled, and important construction data in the drilling process is avoided.
In this embodiment, the data processing module transmits the calculated rotation speed data and the data acquired by the magnetometer and the accelerometer to a wireless while drilling monitoring system (MWD) and/or an while drilling detection system (EM-MWD) corresponding to the while drilling imaging logging instrument together through the RS-485 bus, so as to provide data support for operation monitoring and management of the while drilling imaging logging instrument.
In the device for switching modes of the imaging logging instrument while drilling provided by the embodiment of the invention, each module or unit structure can independently or in combination operate according to actual application requirements so as to realize corresponding technical effects.
By adopting the device provided by the embodiment of the invention, the running data of the instrument is acquired through the inertial sensor arranged on the imaging logging instrument while drilling, the high-speed FPGA is utilized for high-speed counting and sampling, a specific algorithm and a specific standard are designed for calculating the rotation speed of the instrument, and then the high-power imaging mode or the low-power curve mode is judged to be entered.
Example two
In view of the other aspects of any one or more of the foregoing embodiments, the present invention further provides a method for controlling a switching mode of an imaging logging while drilling instrument, where the method is applied to an apparatus described in any one or more of the foregoing embodiments, and fig. 7 provides a schematic flow chart of a method for controlling a switching mode of an imaging logging while drilling instrument in an embodiment of the present invention, as shown in fig. 7, where the method provided in the embodiment of the present invention includes:
step S710, acquiring operation data of the imaging logging while drilling instrument by using an inertial sensor arranged on the imaging logging while drilling instrument;
step S720, synchronously measuring the running time of the imaging logging instrument while drilling through a timer;
step 730, preprocessing the received operation data and the operation time by adopting a data processing module, calculating the rotation speed of the imaging logging while drilling instrument according to the preprocessed operation data and the operation time, and generating corresponding control signals based on the rotation speed of the imaging logging while drilling instrument to control the imaging logging while drilling instrument to operate in different working modes.
In one embodiment, in the step S730, the following operations are included:
the operation data electric signal and the operation time electric signal are obtained by a preprocessing unit of the data processing module, and the operation data electric signal and the operation time electric signal are respectively converted into corresponding digital signals by an analog-to-digital conversion circuit;
and the preprocessing unit of the data processing module is utilized to acquire the running time electric signal from the preprocessing unit through an SPI bus, convert the running time electric signal into a corresponding digital signal, calculate the rotating speed of the imaging logging instrument while drilling based on the digital signal, and generate a corresponding control signal and a mode zone bit according to the rotating speed so as to control the imaging logging instrument while drilling to run in different working modes.
In one embodiment, the preprocessing unit acquires the operation data electric signal and the operation time electric signal according to a set acquisition period through an FPGA chip.
In one embodiment, the inertial sensor employs a gyroscope, and in step S730, the rotational speed of the imaging logging while drilling instrument is calculated according to the following formula:
wherein,for the rotation speed of the imaging logging instrument while drilling, the unit is rotation/second, t is the running time of the imaging logging instrument while drilling, the unit is second, ga is the angle through which the inertial sensor rotates in the t time, and Gs is the static state of the inertial sensorAnd acquiring a reference value of M data points in a state, wherein Gr is a ratio coefficient of the inertial sensor in a rotating state when the inertial sensor rotates for L weeks, vgsn is a reading of the inertial sensor at the time n, and Vgst is a reading of the inertial sensor at the time t.
Further, the following operations are performed by the arithmetic control unit of the data processing module:
comparing the rotating speed of the imaging logging while drilling instrument with a set rotating speed threshold R_Lowest, and if the rotating speed of the imaging logging while drilling instrument is greater than R_Lowest, generating a corresponding first control signal; otherwise, generating a corresponding second control signal;
generating a first mode zone bit and a second mode zone bit which correspond to the first control signal and the second control signal respectively;
controlling the logging while drilling imaging logging instrument to enter a resistivity/gamma/neutron/density imaging mode through the first mode zone bit, calculating a tool face, and sampling according to a set first density; controlling the imaging logging while drilling instrument to enter a total resistivity or gamma mode through the second mode marker bit, not imaging, and sampling according to a set second density;
wherein, the rotating speed threshold R_Lowest is more than or equal to 1/x, and x is the period of the data processing module for acquiring the operation data and the operation time; the first density and the second density are set according to configuration parameters of the imaging logging while drilling instrument and sampling requirements, and the first density is greater than the second density.
In an alternative embodiment, the step S730 further includes the following operations:
and the data processing module transmits the calculated rotating speed data to a wireless while-drilling monitoring system and/or a while-drilling detection system corresponding to the while-drilling imaging logging instrument through an RS-485 bus, so as to provide data support for the operation monitoring and management of the while-drilling imaging logging instrument.
It is to be understood that the disclosed embodiments are not limited to the specific structures, process steps, or materials disclosed herein, but are intended to extend to equivalents of these features as would be understood by one of ordinary skill in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Although the embodiments of the present invention are described above, the embodiments are only used for facilitating understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.
Claims (8)
1. An apparatus for controlling a switching mode of an imaging logging while drilling instrument, the apparatus comprising:
an inertial sensor disposed on the imaging logging while drilling instrument configured to acquire operational data of the imaging logging while drilling instrument while operating;
a timer configured to synchronously measure a run time of the while-drilling imaging logging instrument;
the data processing module is configured to preprocess the acquired operation data and the operation time, calculate the rotation speed of the imaging logging while drilling instrument according to the preprocessed operation data and the operation time, and generate corresponding control signals based on the rotation speed of the imaging logging while drilling instrument so as to control the imaging logging while drilling instrument to operate in different working modes;
the operation control unit of the data processing module performs the following operations:
comparing the rotating speed of the imaging logging while drilling instrument with a set rotating speed threshold R_Lowest, and if the rotating speed of the imaging logging while drilling instrument is greater than R_Lowest, generating a corresponding first control signal; otherwise, generating a corresponding second control signal;
generating a first mode zone bit and a second mode zone bit which correspond to the first control signal and the second control signal respectively;
controlling the logging while drilling imaging logging instrument to enter a resistivity/gamma/neutron/density imaging mode through the first mode zone bit, calculating a tool face, and sampling according to a set first density; controlling the imaging logging while drilling instrument to enter a total resistivity or gamma mode through the second mode marker bit, not imaging, and sampling according to a set second density;
wherein, the rotating speed threshold R_Lowest is more than or equal to 1/x, and x is the period of the data processing module for acquiring the operation data and the operation time; the first density and the second density are set according to configuration parameters of the imaging logging while drilling instrument and sampling requirements, and the first density is greater than the second density.
2. The apparatus of claim 1, wherein the data processing module comprises:
the preprocessing unit is configured to acquire the operation data electric signals and the operation time electric signals, and an analog-to-digital conversion circuit is adopted to respectively convert the operation data electric signals and the operation time electric signals into corresponding digital signals;
the operation control unit acquires the running time electric signal from the preprocessing unit through the SPI bus, converts the running time electric signal into a corresponding digital signal, calculates the rotating speed of the imaging logging instrument while drilling based on the digital signal, and generates a corresponding control signal and a mode zone bit according to the rotating speed so as to control the imaging logging instrument while drilling to run in different working modes.
3. The apparatus of claim 1, wherein the inertial sensor employs a gyroscope and the arithmetic control unit of the data processing module calculates the rotational speed of the imaging logging while drilling instrument according to the following formula:
wherein,r is the rotation speed of the imaging logging instrument while drilling, t is the running time of the imaging logging instrument while drilling, ga is the rotating angle of the inertial sensor in t time, gs is the reference value when M data points are collected in the static state of the inertial sensor, gr is the ratio coefficient when the inertial sensor rotates for L weeks in the rotating state, vgsn is the reading of the inertial sensor at n time, and Vgst is the reading of the inertial sensor at t time.
4. The apparatus of claim 2, wherein the preprocessing unit acquires the operation data electrical signal and the operation time electrical signal through an FPGA chip according to a set acquisition period.
5. The apparatus of any of claims 1-4, wherein the data processing module is further configured to:
and transmitting the calculated rotating speed data to a wireless while-drilling monitoring system and/or a while-drilling detection system corresponding to the while-drilling imaging logging instrument through an RS-485 bus, and providing data support for operation monitoring and management of the while-drilling imaging logging instrument.
6. The apparatus of claim 1, wherein the inertial sensor employs a MEMS gyroscope.
7. A method of controlling a switching mode of an imaging logging while drilling instrument, the method comprising:
s1, acquiring operation data of an imaging logging while drilling instrument by using an inertial sensor arranged on the imaging logging while drilling instrument;
step S2, synchronously measuring the running time of the imaging logging instrument while drilling through a timer;
s3, preprocessing the received operation data and the operation time by adopting a data processing module, calculating the rotation speed of the imaging logging while drilling instrument according to the preprocessed operation data and the operation time, and generating corresponding control signals based on the rotation speed of the imaging logging while drilling instrument to control the imaging logging while drilling instrument to operate in different working modes;
the step S3 includes:
comparing the rotating speed of the imaging logging while drilling instrument with a set rotating speed threshold R_Lowest, and if the rotating speed of the imaging logging while drilling instrument is greater than R_Lowest, generating a corresponding first control signal; otherwise, generating a corresponding second control signal;
generating a first mode zone bit and a second mode zone bit which correspond to the first control signal and the second control signal respectively;
controlling the logging while drilling imaging logging instrument to enter a resistivity/gamma/neutron/density imaging mode through the first mode zone bit, calculating a tool face, and sampling according to a set first density; controlling the imaging logging while drilling instrument to enter a total resistivity or gamma mode through the second mode marker bit, not imaging, and sampling according to a set second density;
wherein, the rotating speed threshold R_Lowest is more than or equal to 1/x, and x is the period of the data processing module for acquiring the operation data and the operation time; the first density and the second density are set according to configuration parameters of the imaging logging while drilling instrument and sampling requirements, and the first density is greater than the second density.
8. The method of claim 7, wherein in step S3, the rotational speed of the imaging logging while drilling instrument is calculated according to the following formula:
wherein,r isThe rotation speed of the imaging logging instrument while drilling is in units of revolutions per second, t is the running time of the imaging logging instrument while drilling, in units of seconds, ga is the angle through which the inertial sensor rotates in t time, gs is the reference value when M data points are collected in the static state of the inertial sensor, gr is the ratio coefficient when the inertial sensor rotates for L weeks in the rotating state of the inertial sensor, vgsn is the reading of the inertial sensor at n time, and Vgst is the reading of the inertial sensor at t time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010829063.3A CN114151065B (en) | 2020-08-18 | 2020-08-18 | Device and method for controlling switching mode of imaging logging instrument while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010829063.3A CN114151065B (en) | 2020-08-18 | 2020-08-18 | Device and method for controlling switching mode of imaging logging instrument while drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114151065A CN114151065A (en) | 2022-03-08 |
| CN114151065B true CN114151065B (en) | 2024-04-05 |
Family
ID=80460465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010829063.3A Active CN114151065B (en) | 2020-08-18 | 2020-08-18 | Device and method for controlling switching mode of imaging logging instrument while drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151065B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5899958A (en) * | 1995-09-11 | 1999-05-04 | Halliburton Energy Services, Inc. | Logging while drilling borehole imaging and dipmeter device |
| CN101676520A (en) * | 2008-09-17 | 2010-03-24 | 上海市电力公司 | Horizontal guiding drill while-drilling acoustic wave imaging detection early warning system and detection method thereof |
| CN202611685U (en) * | 2011-11-30 | 2012-12-19 | 航天科工惯性技术有限公司 | Gyro attitude measuring instrument for combination logging |
| CN103147743A (en) * | 2013-02-20 | 2013-06-12 | 西安思坦仪器股份有限公司 | Measurement-while-drilling two-way communication method and system thereof |
| CN107288628A (en) * | 2017-07-11 | 2017-10-24 | 中石化石油工程技术服务有限公司 | One kind is with brill gamma imager simulation test self-con-tained unit |
| CN108240213A (en) * | 2016-12-24 | 2018-07-03 | 中石化石油工程技术服务有限公司 | The geosteering device and geosteering method of a kind of more investigation depths |
| CN108894774A (en) * | 2018-07-27 | 2018-11-27 | 徐芝香 | Combined type measurement while drilling tool and measurement method |
| CN110344823A (en) * | 2019-06-19 | 2019-10-18 | 中国石油天然气集团有限公司 | It is a kind of based on rotary steerable tool with bore gamma resistivity imaging tool device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180283156A1 (en) * | 2017-04-03 | 2018-10-04 | Nabors Drilling Technologies Usa, Inc. | Binning During Non-Rotation Drilling in a Wellbore |
| US11193363B2 (en) * | 2017-12-04 | 2021-12-07 | Gyrodata, Incorporated | Steering control of a drilling tool |
-
2020
- 2020-08-18 CN CN202010829063.3A patent/CN114151065B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5899958A (en) * | 1995-09-11 | 1999-05-04 | Halliburton Energy Services, Inc. | Logging while drilling borehole imaging and dipmeter device |
| CN101676520A (en) * | 2008-09-17 | 2010-03-24 | 上海市电力公司 | Horizontal guiding drill while-drilling acoustic wave imaging detection early warning system and detection method thereof |
| CN202611685U (en) * | 2011-11-30 | 2012-12-19 | 航天科工惯性技术有限公司 | Gyro attitude measuring instrument for combination logging |
| CN103147743A (en) * | 2013-02-20 | 2013-06-12 | 西安思坦仪器股份有限公司 | Measurement-while-drilling two-way communication method and system thereof |
| CN108240213A (en) * | 2016-12-24 | 2018-07-03 | 中石化石油工程技术服务有限公司 | The geosteering device and geosteering method of a kind of more investigation depths |
| CN107288628A (en) * | 2017-07-11 | 2017-10-24 | 中石化石油工程技术服务有限公司 | One kind is with brill gamma imager simulation test self-con-tained unit |
| CN108894774A (en) * | 2018-07-27 | 2018-11-27 | 徐芝香 | Combined type measurement while drilling tool and measurement method |
| CN110344823A (en) * | 2019-06-19 | 2019-10-18 | 中国石油天然气集团有限公司 | It is a kind of based on rotary steerable tool with bore gamma resistivity imaging tool device |
Non-Patent Citations (3)
| Title |
|---|
| 一种随钻测井旋转定位模块设计;庞海波;;西部探矿工程;29(04);第24-26页 * |
| 测井技术新进展综述;原宏壮等;地球物理学进展;20(03);第786-795页 * |
| 高精度随钻成像测井关键技术;路保平等;石油钻探技术;第47卷(第3期);第148-155页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114151065A (en) | 2022-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202081888U (en) | Near-bit geo-steering system | |
| US7004021B2 (en) | Method and system for detecting conditions inside a wellbore | |
| US9464519B2 (en) | Method and apparatus for detecting gamma radiation downhole | |
| US6651496B2 (en) | Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment | |
| CN104343438B (en) | Measure the rotating excitation field rangefinder and its measurement method of drilling well relative distance | |
| US12235194B2 (en) | Coring device | |
| CN1676874A (en) | Hole Deviation and Azimuth Gamma Measurement While Drilling | |
| CN100510318C (en) | Full optical fiber digital inclinometer | |
| CN106640046B (en) | A rotating tool face angle testing device | |
| CN112096289B (en) | A near-drill-bit geo-steering drilling system | |
| CN107701170A (en) | A kind of nearly drill bit image measuring device and method | |
| CN212003162U (en) | Electromagnetic wave logging-while-drilling parameter monitoring device | |
| CN114151065B (en) | Device and method for controlling switching mode of imaging logging instrument while drilling | |
| CN112228038B (en) | Intelligent drilling and on-line detection system for large-diameter drilled pile | |
| CN207649620U (en) | A kind of device for positioning mobile device track | |
| CN111305823A (en) | Mining drilling cableless detection system | |
| CN114658423B (en) | Active magnetic measurement system and method for magnetic shielding mode | |
| CN119491708A (en) | A well logging system and method based on azimuthal gamma imaging while drilling | |
| CN203239317U (en) | Working parameter measuring device of screw drill tool for petroleum drilling | |
| CN212837586U (en) | a rotary guide | |
| CN115961942A (en) | Near-bit measurement circuit for drilling while drilling system and its realization method | |
| CN112177601B (en) | Method and device for measuring rotation speed of drilling tool while drilling | |
| CN212583683U (en) | Mining drilling cableless detection system | |
| CN211692312U (en) | Non-excavation underground guiding system | |
| CN207296994U (en) | A kind of DS-MWD wireless drillings measuring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |