CN112907925A - Downhole data monitoring system and method - Google Patents
Downhole data monitoring system and method Download PDFInfo
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- CN112907925A CN112907925A CN201911218948.3A CN201911218948A CN112907925A CN 112907925 A CN112907925 A CN 112907925A CN 201911218948 A CN201911218948 A CN 201911218948A CN 112907925 A CN112907925 A CN 112907925A
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
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- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
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Abstract
The invention provides a downhole data monitoring system, comprising: the signal transmitting module is used for transmitting the acquired underground measurement signal through a first electromagnetic signal after modulation and power amplification; the relay transmission module is used for receiving the first electromagnetic signal transmitted by the signal transmission module, demodulating the first electromagnetic signal into a second electromagnetic signal and transmitting the second electromagnetic signal, wherein the frequency and the intensity of the second electromagnetic signal are different from those of the first electromagnetic signal; and the ground monitoring module is used for receiving the second electromagnetic signal transmitted by the relay transmission module, and carrying out underground parameter curve and numerical value display after processing and analysis so as to reflect the change of the underground parameters in real time. The invention can effectively improve the transmission depth of the electromagnetic signal, so that the electromagnetic signal is not limited by the stratum conductivity any more; the underground data can be acquired through the ground monitoring module, and the acquired data can be displayed in a real-time curve and numerical form, so that the analysis and the processing of workers are facilitated.
Description
Technical Field
The invention relates to the technical field of oilfield development, in particular to a downhole data monitoring system and a method.
Background
With the rapid development of social economy, the demand of human beings on oil and gas resources is increasing day by day, the oil and gas exploration and development range is continuously expanded, more and more special oil and gas reservoirs exist, and the underground oil and gas storage environment is more and more complex. How to realize refined exploitation and control and modernization and intellectualization of oilfield production management in the oil and gas exploitation process becomes a problem to be solved urgently in current oil and gas production. The method has the advantages that the temperature and pressure information of the underground oil layer can be accurately acquired in real time in oil exploitation, the method has extremely important significance for understanding the reservoir characteristics of the oil layer and analyzing the oil and gas reserves and distribution, and the method plays an important role in adjusting and optimizing an oil extraction scheme, improving the exploitation efficiency, predicting the system fault and improving the long-term overall economic benefit of the oil field. Whether data acquisition and signal transmission can be continuously carried out for a long time is the key for accurately acquiring underground parameter information in real time.
At present, underground data transmission modes are divided into wired transmission and wireless transmission. Wired transmission means oil cable transmission, by means of storage means and wired transmission means combined with wireless transmission. The cable transmission can extract underground data in real time for processing and storing, but the disturbance of the cable generates interference on the surrounding pressure field and temperature field, and the measurement precision is influenced; the specification and placement of the cable can also affect the opening and closing of the oil well; the mode of storing the tool is that before the parameters of the oil well need to be tested, the working mode and the parameters of the storage device are set in advance, then the storage device is placed underground by a cable, and the storage device is taken out and underground data is obtained when the well is changed next time; the wired transmission combined with the wireless signal is not completely free from cable transmission, and the use of the mode is limited.
The wireless transmission mode adopts mud pulse, sound wave and electromagnetic wave as transmission media. The mud pulse transmission mode is widely used in the drilling process due to the transmission of the drilling fluid; the sound wave is not applied to production practice due to fast attenuation, large environmental interference and difficult receiving; the electromagnetic wave transmission rate is high, the safety is high, the cost is low, and the method has the advantages that other two kinds of wireless transmission cannot be compared, but the signal attenuation caused by the formation conductivity is low in the possibility of long-distance transmission, and the transmission depth of the electromagnetic signal is a key factor for restricting the development and application of the electromagnetic transmission technology at present.
Accordingly, the present invention provides a downhole data monitoring system and method.
Disclosure of Invention
To solve the above problems, the present invention provides a downhole data monitoring system, comprising:
the signal transmitting module is used for transmitting the acquired underground measurement signal through a first electromagnetic signal after modulation and power amplification;
the relay transmission module is used for receiving the first electromagnetic signal transmitted by the signal transmission module, demodulating the first electromagnetic signal into a second electromagnetic signal and transmitting the second electromagnetic signal, wherein the frequency and the intensity of the second electromagnetic signal are different from those of the first electromagnetic signal;
and the ground monitoring module is used for receiving the second electromagnetic signal transmitted by the relay transmission module, and carrying out underground parameter curve and numerical value display after processing and analysis so as to reflect the change of the underground parameters in real time.
According to one embodiment of the invention, the system further comprises a downhole testing tool for acquiring the downhole measurement signal, comprising: temperature test instruments and pressure test instruments.
According to one embodiment of the present invention, the signal transmitting module includes:
signal acquisition circuitry in communication with the downhole testing instrument for converting the downhole measurement signals acquired by the downhole testing instrument into electrical signals;
the first signal conditioning circuit is communicated with the signal acquisition circuit and is used for modulating and amplifying the electric signal to obtain the first electromagnetic signal;
a signal transmitting circuit in communication with the first signal conditioning circuit for transmitting the first electromagnetic signal;
and the microcontroller is communicated with the signal acquisition circuit, the first signal conditioning circuit and the signal transmitting circuit and is used for controlling the processes of signal acquisition, signal conditioning and signal transmission.
According to one embodiment of the invention, the relay transmission module comprises a downhole relay, wherein the downhole relay comprises:
a repeater receive antenna in communication with the signal transmission module for receiving the first electromagnetic signal;
second signal conditioning circuitry, in communication with the repeater receive antenna, for demodulating the first electromagnetic signal to generate the second electromagnetic signal;
a repeater transmit antenna in communication with the second signal conditioning circuit for transmitting the second electromagnetic signal.
According to one embodiment of the invention, the surface monitoring module comprises: and the monitoring tool is used for demodulating, decoding and amplifying the second electromagnetic signal and realizing downhole parameter curve and numerical value display.
According to one embodiment of the invention, the system further comprises: a downhole power generation module for powering the downhole testing tool and the microcontroller.
According to one embodiment of the invention, the downhole power generation module comprises: the device comprises an impeller, a power generation device and a storage battery, wherein the impeller rotates under the drive of a mixed liquid of high-pressure oil, gas and water in a well to drive the power generation device to generate power, and the storage battery supplies power.
According to an embodiment of the present invention, the downhole power generation module further comprises a solenoid valve for switching a first power supply mode and a second power supply mode, wherein in the first power supply mode, the downhole testing instrument, the microcontroller and the storage battery are powered by the power generation device in real time, and in the second power supply mode, the downhole testing instrument and the microcontroller are powered by the storage battery.
According to another aspect of the invention, there is also provided a downhole data monitoring method comprising the steps of:
the method comprises the steps that an underground measurement signal acquired through signal transmission module is transmitted through a first electromagnetic signal after being modulated and power amplified;
receiving the first electromagnetic signal transmitted by the signal transmitting module through a relay transmission module, demodulating the first electromagnetic signal into a second electromagnetic signal and transmitting the second electromagnetic signal, wherein the second electromagnetic signal and the first electromagnetic signal have different frequencies and intensities;
and receiving the second electromagnetic signal transmitted by the relay transmission module through a ground monitoring module, and carrying out underground parameter curve and numerical value display after processing and analysis so as to reflect the change of the underground parameters in real time.
According to one embodiment of the invention, the power supply is performed through a downhole power generation module, and the power supply comprises a first power supply mode and a second power supply mode, wherein in the first power supply mode, the downhole testing instrument, the microcontroller and the storage battery are powered in real time through a power generation device, and in the second power supply mode, the downhole testing instrument and the microcontroller are powered through the storage battery.
The underground data monitoring system and the method provided by the invention can effectively improve the transmission depth of the electromagnetic signal, so that the electromagnetic signal is not limited by the stratum conductivity any more; the underground data can be acquired through the ground monitoring module, and the acquired data can be displayed in a real-time curve and numerical form, so that the analysis and the processing of workers are facilitated; the underground power generation module supplies power to the underground test instrument, replaces a storage battery and a cable to supply power, is safe and environment-friendly, saves manpower and material resources and reduces the cost; and possess two kinds of power supply modes, through closing of control solenoid for power generation facility can be in the dormancy state, can avoid the loss that its long-time operation caused, and when power generation facility was in the dormancy state, the battery can continue the power supply for test instrument in the pit.
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, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 shows a block diagram of a downhole data monitoring system according to an embodiment of the invention;
FIG. 2 shows a block diagram of a downhole data monitoring system according to another embodiment of the invention;
FIG. 3 shows a schematic view of a downhole data monitoring system according to an embodiment of the invention; and
FIG. 4 shows a flow diagram of a downhole data monitoring method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
In the prior art, a conventional underground data monitoring instrument system is easy to break down under the severe underground environment of high temperature and high pressure, and the repeated measurement times are increased; the underground testing instrument and the cable damage a pressure field and a temperature field near fluid in the repeated downhole process, the measurement precision is reduced, and the cost is higher.
FIG. 1 shows a block diagram of a downhole data monitoring system according to an embodiment of the invention. As shown in fig. 1, the monitoring system 100 includes a signal transmitting module 101, a relay transmission module 102, and a ground monitoring module 103.
The signal transmitting module 101 is configured to transmit the acquired downhole measurement signal through a first electromagnetic signal after modulation and power amplification.
The relay transmission module 102 is configured to receive a first electromagnetic signal transmitted by the signal transmitting module 101, demodulate the first electromagnetic signal into a second electromagnetic signal, and transmit the second electromagnetic signal, where the second electromagnetic signal and the first electromagnetic signal have different frequencies and intensities.
The ground monitoring module 103 is configured to receive the second electromagnetic signal transmitted by the relay transmission module 102, and perform processing and analysis on the second electromagnetic signal to perform downhole parameter curve and numerical value display, so as to reflect changes of downhole parameters in real time.
FIG. 2 shows a block diagram of a downhole data monitoring system according to another embodiment of the invention. As shown in fig. 2, the monitoring system 100 includes a signal transmitting module 101, a relay transmission module 102, a surface monitoring module 103, a downhole testing tool 201, and a downhole power generation module 202.
The signal transmitting module 101 includes a signal collecting circuit 1011, a first signal conditioning circuit 1012 and a signal transmitting circuit 1013; the relay transmission module 102 includes a relay receiving antenna 1021, a second signal conditioning circuit 1022, and a relay transmitting antenna 1023; downhole testing tool 201 includes temperature testing tool 2011 and pressure testing tool 2012; the downhole power module 202 includes an impeller 2021, a power generator 2022, and a battery 2023.
The downhole testing tool 201 is for acquiring downhole measurement signals, and includes: temperature test instrument 2011 and pressure test instrument 2012. The temperature test instrument 2011 is used for acquiring a temperature signal; the pressure test instrument 2012 collects pressure signals.
The signal acquisition circuit 1011 is in communication with the downhole testing tool 201 for converting downhole measurement signals acquired by the downhole testing tool 201 into electrical signals. The first signal conditioning circuit 1012 is in communication with the signal acquisition circuit 1011 and is configured to modulate and power-amplify the electrical signal to obtain a first electromagnetic signal.
Generally, the basic principle behind downhole data transmission is the electromagnetic induced current field. The high-permeability magnetic core at the transmitting antenna end can induce a simple harmonic changing magnetic field under the excitation action of the alternating current, and the simple harmonic changing magnetic field can induce an alternating current changing electric field in the oil pipe, the sleeve pipe and the annular area thereof. The magnetic core coil positioned in the upper shaft can capture the changed electromagnetic signal and generate an output signal, and the information such as underground temperature and pressure can be extracted by processing the output signal (second electromagnetic signal) of the receiving coil on the ground, so that the signal transmission is finally realized. The underground signal transmission takes a sine wave as a carrier signal (comprising a first electromagnetic signal and a second electromagnetic signal), converts information such as temperature, pressure and the like into corresponding voltage signals, directly controls the output of sine waves with different frequencies through the change of the voltage signals, and then directly drives the transmitting antenna through a signal amplification circuit and triode current amplification.
The signal transmitting circuit 1013 is in communication with the first signal conditioning circuit 1012 for transmitting the first electromagnetic signal.
Microcontroller 1014 is in communication with signal acquisition circuit 1011, first signal conditioning circuit 1012, and signal transmission circuit 1013 for controlling the signal acquisition, signal conditioning, and signal transmission processes.
Generally speaking, according to the requirement of the monitoring system 100, a corresponding and suitable single chip microcomputer can be selected as a chip of the microcontroller, and a set development board consisting of temperature and pressure sensors and a first signal conditioning circuit is used. The effects are three: firstly, the temperature and pressure sensors are controlled to carry out data acquisition and signal conversion. Mainly utilizes the A/D acquisition function and the D/A output function of the singlechip. The resistance temperature and pressure sensors are connected in series to the controller voltage division circuit to convert the temperature and pressure changes of the medium into the changes of voltage values, and the single chip microcomputer acquires corresponding voltage signals and converts the voltage signals into corresponding digital quantities to be stored; the second is the transmission of control signals. The digital quantity in the first action controls the singlechip D/A to output the frequency of sine waves, so that the one-to-one correspondence of temperature values and sine waves with different frequencies is finally realized, the sine waves are amplified by a signal amplifying circuit, and the amplified sine wave signals are amplified by triode current to reach the signal intensity enough for driving a transmitting antenna; thirdly, receiving the signals, and measuring the frequency of the sine waves received by the receiving antenna through the single chip microcomputer.
The relay transmission module 102 comprises a downhole relay, wherein the downhole relay comprises: a repeater receive antenna 1021, a second signal conditioning circuit 1022, and a repeater transmit antenna 1023.
Repeater receive antenna 1021 is in communication with signal transmission module 101 for receiving the first electromagnetic signal. Second signal conditioning circuitry 1022 is in communication with repeater receive antenna 1021 for performing demodulation processing on the first electromagnetic signal to generate a second electromagnetic signal. Repeater transmit antenna 1023 is in communication with second signal conditioning circuitry 1022 for transmitting a second electromagnetic signal.
Generally, in the demodulation process, a signal is amplified and then converted into a square wave at a receiving antenna end (a single chip microcomputer usually counts the square wave, and a timer (with a pulse counting function) of the single chip microcomputer is used for measuring the number of pulses within a set time so as to calculate the frequency of a measured signal), and the frequency of a sine wave can be measured through the timed counting of the single chip microcomputer, so that corresponding information such as temperature, pressure and the like can be extracted.
The surface monitoring module 103 includes: and the monitoring tool is used for demodulating, decoding and amplifying the second electromagnetic signal and realizing downhole parameter curve and numerical value display.
The downhole power generation module 202 includes: the power generation device comprises an impeller 2021, a power generation device 2022 and a storage battery 2023, wherein the impeller 2021 is driven to rotate by a mixed liquid of high-pressure oil, gas and water in the well to drive the power generation device 2022 to generate power and supply power to the storage battery 2023.
The downhole power generation module 202 further comprises a solenoid valve for switching between a first power supply mode, in which the downhole test instrument 201, the microcontroller 1014 and the battery 2023 are powered in real time by the power generation device 2022, and a second power supply mode, in which the downhole test instrument 203 and the microcontroller 1014 are powered by the battery 2023.
The underground data acquisition system can continuously and accurately acquire underground data in real time for a long time (or discontinuously), and can supply power to an underground test instrument through the bottom-hole power generation module, so that the underground test instrument can be permanently placed at the bottom of a well for long-time use; the signal transmission takes electromagnetic waves as a transmission medium, and establishes communication with the ground by using a relay transmission technology, so that underground data ground acquisition and intelligent production management of an oil well are realized.
FIG. 3 shows a schematic diagram of a downhole data monitoring system according to an embodiment of the invention. As shown in fig. 3, 1 denotes a derrick, 2 denotes a ground receiving end (ground monitoring module 103), 3 denotes a casing, 4 denotes a downhole repeater, 5 denotes a repeater transmitting antenna (1023 in fig. 2), 6 denotes a second signal conditioning circuit (1022 in fig. 2), 7 denotes a repeater receiving antenna (1021 in fig. 2), 8 denotes a tubing, 9 denotes a packer, 10 denotes a signal transmitting module (101 in fig. 1-2), and 11 denotes a downhole power generating module (202 in fig. 2).
The underground power generation module 11 is composed of an impeller, a generator (power generation device) and a storage battery, the impeller is driven to rotate by using high-pressure oil, gas and water mixed liquid in an oil well, so that the generator is driven to generate power, the generated alternating current is converted into voltage-stabilizing direct current through a rectifying circuit to supply power to the storage battery, an underground measuring instrument and a microcontroller, and the conversion of fluid kinetic energy, mechanical energy and electric energy is realized.
In one embodiment, in order to avoid the loss caused by long-time operation of the downhole power generation module 11, the oil-gas-water mixed liquid can be isolated from entering the impeller by controlling the closing of the electromagnetic valve therein, so that the downhole power generation module 11 is in a dormant state, and the internal storage battery can continue to supply power for the downhole testing instrument.
The signal transmitting module 10 is composed of a signal collecting circuit, a first signal conditioning circuit, a signal transmitting circuit and a microcontroller, and the underground signal transmitting module 10 has the functions of collecting underground measurement parameters through a sensor, modulating, coding, amplifying power and the like, and then transmitting the underground measurement parameters in a carrier mode through the signal transmitting circuit. The signal acquisition circuit converts temperature and pressure signals transmitted by the underground test instrument into voltage or current signals, the first electromagnetic signals are modulated, coded, amplified in power and the like, the first electromagnetic signals are transmitted by the signal transmission circuit, and the microcontroller controls the signal conditioning and transmission.
The relay transmission module 102 is a downhole (electromagnetic) relay 4, and its main function is to realize the forwarding of downhole electromagnetic signals. The downhole repeater 4 is installed on the upper part of the signal transmitting module 10 and can receive and transmit electromagnetic signals. The underground repeater 4 receives the first electromagnetic signal transmitted by the signal transmitting module 10, re-encodes and modulates the first electromagnetic signal into a frequency signal (a second electromagnetic signal) different from the signal transmitting module after the processes of demodulation, decoding, power amplification and the like, and then forwards the second electromagnetic signal to the ground receiving end 2, so that the relay transmission of the underground electromagnetic signal is realized. The strength of the ground receiving signal can be improved through the underground repeater 4, so that the ground receiving end 2 can receive the electromagnetic signal with better quality.
Further, the downhole repeater 4 receives the first electromagnetic signal transmitted by the signal transmitting module 10 through the repeater receiving antenna 7, demodulates, decodes and amplifies the first electromagnetic signal by the second signal conditioning circuit 6, then re-modulates and codes the first electromagnetic signal into a signal (second electromagnetic signal) with a frequency different from the received frequency, and transmits the signal (second electromagnetic signal) to the ground receiving end 2 by the repeater transmitting antenna 5.
And the ground receiving end 2 demodulates, decodes, amplifies and the like the received second electromagnetic signal, and then sends the second electromagnetic signal to the upper computer monitoring software for processing and feeding back to the working personnel. Specifically, the ground receiving end 2 receives the second electromagnetic signal forwarded by the underground repeater 4 through the receiving end, and after the second electromagnetic signal is processed by the upper computer monitoring software, the acquired signal is presented and stored in a real-time curve and numerical form.
In the prior art, the reliable use of a downhole testing instrument provides guarantee for collecting data for a long time, but the energy supply of the testing instrument is a big problem. The storage battery is used for supplying power, the production is influenced due to frequent replacement and maintenance and limited power supply time, and the transmission distance of the electric energy for supplying power to cables of deep wells and ultra-deep wells is limited. The invention supplies power to the underground test instrument through the bottom hole power generation module, so that the underground test instrument can be permanently placed at the bottom hole for long-time use, electromagnetic waves are used as signal transmission media, communication is established with the ground by utilizing a relay transmission technology, and the underground data acquisition and the intelligent production management of an oil well are realized. The research design of the invention not only saves energy, is safe and environment-friendly, but also can improve the oil reservoir management level, reduce the oil extraction cost, improve the economic benefit of oil well production, promote the development of the oil well production management to the direction of informatization, digitization and intellectualization, and has very wide application prospect.
FIG. 4 shows a flow diagram of a downhole data monitoring method according to an embodiment of the invention.
As shown in fig. 4, in step S401, the acquired downhole measurement signal is modulated and power-amplified by the signal transmitting module, and then transmitted by the first electromagnetic signal.
In step S402, the relay transmission module receives a first electromagnetic signal transmitted by the signal transmission module, demodulates the first electromagnetic signal into a second electromagnetic signal, and transmits the second electromagnetic signal, where the second electromagnetic signal and the first electromagnetic signal have different frequencies and intensities.
In step S403, the ground monitoring module receives the second electromagnetic signal transmitted by the relay transmission module, and performs processing and analysis, and then performs downhole parameter curve and numerical value display to reflect changes of downhole parameters in real time.
In one embodiment, the power supply is performed through the downhole power generation module, and the power supply comprises a first power supply mode and a second power supply mode, wherein in the first power supply mode, the power generation device supplies power to the downhole testing instrument, the microcontroller and the storage battery in real time, and in the second power supply mode, the storage battery supplies power to the downhole testing instrument and the microcontroller.
The underground data monitoring system and the method provided by the invention can effectively improve the transmission depth of the electromagnetic signal, so that the electromagnetic signal is not limited by the stratum conductivity any more; the underground data can be acquired through the ground monitoring module, and the acquired data can be displayed in a real-time curve and numerical form, so that the analysis and the processing of workers are facilitated; the underground power generation module supplies power to the underground test instrument, replaces a storage battery and a cable to supply power, is safe and environment-friendly, saves manpower and material resources and reduces the cost; and possess two kinds of power supply modes, through closing of control solenoid for power generation facility can be in the dormancy state, can avoid the loss that its long-time operation caused, and when power generation facility was in the dormancy state, the battery can continue the power supply for test instrument in the pit.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures, process steps, or materials disclosed herein but are extended to equivalents thereof as would be understood by those ordinarily skilled 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" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A downhole data monitoring system, the system comprising:
the signal transmitting module is used for transmitting the acquired underground measurement signal through a first electromagnetic signal after modulation and power amplification;
the relay transmission module is used for receiving the first electromagnetic signal transmitted by the signal transmission module, demodulating the first electromagnetic signal into a second electromagnetic signal and transmitting the second electromagnetic signal, wherein the frequency and the intensity of the second electromagnetic signal are different from those of the first electromagnetic signal;
and the ground monitoring module is used for receiving the second electromagnetic signal transmitted by the relay transmission module, and carrying out underground parameter curve and numerical value display after processing and analysis so as to reflect the change of the underground parameters in real time.
2. The system of claim 1, further comprising a downhole testing tool for acquiring the downhole measurement signal, comprising: temperature test instruments and pressure test instruments.
3. The system of claim 2, wherein the signal transmitting module comprises:
signal acquisition circuitry in communication with the downhole testing instrument for converting the downhole measurement signals acquired by the downhole testing instrument into electrical signals;
the first signal conditioning circuit is communicated with the signal acquisition circuit and is used for modulating and amplifying the electric signal to obtain the first electromagnetic signal;
a signal transmitting circuit in communication with the first signal conditioning circuit for transmitting the first electromagnetic signal;
and the microcontroller is communicated with the signal acquisition circuit, the first signal conditioning circuit and the signal transmitting circuit and is used for controlling the processes of signal acquisition, signal conditioning and signal transmission.
4. The system of claim 1, wherein the relay transmission module comprises a downhole relay, wherein the downhole relay comprises:
a repeater receive antenna in communication with the signal transmission module for receiving the first electromagnetic signal;
second signal conditioning circuitry, in communication with the repeater receive antenna, for demodulating the first electromagnetic signal to generate the second electromagnetic signal;
a repeater transmit antenna in communication with the second signal conditioning circuit for transmitting the second electromagnetic signal.
5. The system of claim 1, wherein the surface monitoring module comprises: and the monitoring tool is used for demodulating, decoding and amplifying the second electromagnetic signal and realizing downhole parameter curve and numerical value display.
6. The system of claim 3, wherein the system further comprises: a downhole power generation module for powering the downhole testing tool and the microcontroller.
7. The system of claim 6, wherein the downhole power generation module comprises: the device comprises an impeller, a power generation device and a storage battery, wherein the impeller rotates under the drive of a mixed liquid of high-pressure oil, gas and water in a well to drive the power generation device to generate power, and the storage battery supplies power.
8. The system of claim 7, wherein the downhole power module further comprises a solenoid valve for switching between a first power mode in which the downhole test tool, the microcontroller, and the battery are powered in real time by the power generation device and a second power mode in which the downhole test tool and the microcontroller are powered by the battery.
9. A method of downhole data monitoring, the method comprising the steps of:
the method comprises the steps that an underground measurement signal acquired through signal transmission module is transmitted through a first electromagnetic signal after being modulated and power amplified;
receiving the first electromagnetic signal transmitted by the signal transmitting module through a relay transmission module, demodulating the first electromagnetic signal into a second electromagnetic signal and transmitting the second electromagnetic signal, wherein the second electromagnetic signal and the first electromagnetic signal have different frequencies and intensities;
and receiving the second electromagnetic signal transmitted by the relay transmission module through a ground monitoring module, and carrying out underground parameter curve and numerical value display after processing and analysis so as to reflect the change of the underground parameters in real time.
10. The method of claim 9, wherein the powering by the downhole power generation module comprises a first powering mode in which the downhole test instrument, the microcontroller, and the battery are powered in real time by the power generation device, and a second powering mode in which the downhole test instrument and the microcontroller are powered by the battery.
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| CN113613231A (en) * | 2021-06-28 | 2021-11-05 | 中国地质科学院勘探技术研究所 | Magnetic communication device |
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