CN109441436A - A kind of logging cable high-speed data communications device - Google Patents
A kind of logging cable high-speed data communications device Download PDFInfo
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- CN109441436A CN109441436A CN201811338962.2A CN201811338962A CN109441436A CN 109441436 A CN109441436 A CN 109441436A CN 201811338962 A CN201811338962 A CN 201811338962A CN 109441436 A CN109441436 A CN 109441436A
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- 238000004891 communication Methods 0.000 claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000012545 processing Methods 0.000 claims abstract description 10
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- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 239000003208 petroleum Substances 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 238000013461 design Methods 0.000 description 1
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- 238000011156 evaluation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- 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
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
本发明公开了石油勘探领域的一种测井电缆高速数据通讯装置，包括测井仪数据接口模块、调制解调模块、模拟信号处理模块、电缆模拟信号驱动模块、信号变压器与电源模块；本发明提供的一种测井电缆高速数据通讯装置实现了井下测井仪器通过测井电缆与地面系统进行高速数据通讯的功能，通讯速率在7000米测井电缆上可达到1Mbps以上，同时本发明与测井仪器间采用10/100M自适应以太网或CAN总线接口，地面系统与井下测井仪间是处于同一网络内，地面系统可以方便的访问井下测井仪器，所有的网络应用都可以使用，而不用考虑中间经过何种传输介质和使用了何种传输方法。
The invention discloses a logging cable high-speed data communication device in the field of petroleum exploration, comprising a logging tool data interface module, a modulation and demodulation module, an analog signal processing module, a cable analog signal driving module, a signal transformer and a power supply module; The provided high-speed data communication device for logging cable realizes the function of high-speed data communication between the downhole logging instrument and the ground system through the logging cable. 10/100M self-adaptive Ethernet or CAN bus interface is used between the well tools. The surface system and the downhole logging tools are in the same network. The surface system can easily access the downhole logging tools, and all network applications can be used. It does not need to consider which transmission medium is passed in the middle and which transmission method is used.
Description
Technical field
The present invention relates to oil exploration technology fields, and in particular to downhole logging instruments pass through during a kind of oil exploration
The technology of high-speed data communications is carried out between logging cable and ground system.
Background technique
Petroleum well logging technology is a key areas of petroleum industry technology, is widely used in exploration of oil and gas field and exploitation
Overall process, found for petroleum geology and engineers and technicians and evaluation oil-gas Layer provide important data and data.
With the development of oil-gas exploration and development and electronic technology, exploration engineering has entered array, imagingization exploration stage,
A large amount of underground acquisition data need real-time Transmission to ground, need matched high speed data transfer channel, complete ground
The high speed of mass data, real-time, accurate delivery, transmission rate seriously restrict exploration equipment skill between plane system and downhole instrument
The development and application of art.
Recently as deepening continuously for oil and gas development, it is difficult to the low-quality reservoir effectively exploited and mud stone oil, page in the past
The exploitation of the unconventional oil and gas such as rock gas is taken seriously, and horizontal well development becomes it and mainly seeks production mode, forms a large amount of horizontal well
The service markets such as well logging, Fracturing Monitoring.There is an urgent need to high speeds in long-time horizontal wellbore logging, the application of high sampling rate Fracturing Monitoring
Cable communication device.This high speed cable communication device is exactly the high speed communication in order to solve the prospecting instrument of long-time hot environment
Problem enables to be applied in the service such as high temperature prospect pit, horizontal wellbore logging and Fracturing Monitoring, proposes shelves upgrading for whole system
Play key effect.
Summary of the invention
The technical issues of solution
Aiming at the problem that existing background is proposed, the present invention provides a kind of logging cable high-speed data communications devices.
Technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs:
A kind of logging cable high-speed data communications device, including
Logging instrument data interface module carries out data exchange with logger；
Cable signal digital quantity after analog-to-digital conversion is reduced into truthful data, will need to send out by modulation /demodulation module
The data encoding being sent on cable is converted into analog quantity at data flow and by digital-to-analogue chip；
Analog signal processing module carries out bandpass filtering to the analog signal on cable, and signal amplifies, at modulus sampling
Reason；
Cable emulation signal driver module will be exported via the modulation /demodulation module and the analog signal processing module
Analog signal carry out power amplification to adapt to the decaying of logging cable；
The analog signal for carrying out power amplification is coupled on logging cable by signal transformer；
Power module generates the logging instrument data interface module, modulation /demodulation module, data sharing module, simulation letter
Various DC voltages needed for number processing module, cable emulation signal driver module and signal transformer work.
Further, include dsp processor in the modulation /demodulation module and use DSL modulation and demodulation algorithm, make
Data communication rate on 7000 meters of logging cables reaches 1Mbps or more.
Further, the dsp processor adjusts transmission rate according to length and the characteristic dynamic of logging cable, so that
The transmission rate of the logging cable is optimal state.
Further, it uses between the modulation /demodulation module and the logging instrument data interface module using FPGA as core
The data sharing module of the heart exchanges data.
Further, the logging instrument data interface module uses the multiplex roles circuit using high speed ARM as core, including
Ethernet interface and CAN interface.
Further, the Ethernet interface of the logging instrument data interface module uses Ethernet data Signal Transparent Transmission Technology,
All Ethernet datas can by the logging instrument data interface module upload or under pass.
Beneficial effect
It is had the following beneficial effects: compared with known publicly-owned technology using technical solution provided by the invention
The present invention realizes the function that downhole logging instruments carry out high-speed data communications by logging cable and ground system,
Communication speed can reach 1Mbps or more on 7000 meters of logging cables, while 10/100M is used between the present invention and logger certainly
Ethernet or CAN interface are adapted to, is in consolidated network between ground system and downhole logging instrument, ground system can be square
Just access downhole logging instruments, all network applications can use, and not have to consider intermediate by which kind of transmission medium
With which kind of transmission method used.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.It should be evident that the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is composition schematic diagram of the invention；
Fig. 2 is logging cable modulation and demodulation method schematic diagram of the present invention；
Fig. 3 is FPGA built-in function and external connection relational graph in data sharing module of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The present invention is further described below with reference to embodiment.
In conjunction with Fig. 1: a kind of logging cable high-speed data communications device, including logging instrument data interface module, modulation /demodulation
Module, analog signal processing module, cable emulation signal driver module, signal transformer, power module.
Modulation /demodulation module includes two core devices of dsp processor and FPGA.Dsp processor working frequency is up to
400MHz or more, dsp processor part mainly complete the modulation /demodulation of data flow, carry out the function of data exchange with FPGA.It is excellent
Selection of land, dsp processor and FPGA use DSL modulation and demodulation algorithm to the modulation /demodulation of data flow, modulation and demodulation algorithm use from
Discrete multi-tune technology (DMT) technology of dissipating, is one of the implementation of multi-carrier transmission scheme, its modulation and demodulation are difference
It is realized based on IFFT and FFT, is a kind of multi-carrier transmission scheme that implementation complexity is minimum, most widely used.
The present invention is designed using full duplex frequency division communications mode, using QAM modulation method, according to cable properties benefit when application
Uplink and downlink communication transfer is carried out with its 4KHz to 300KHz frequency band, 4KHz to 300KHz frequency band is divided into multiple subchannels, is examined
Consider the practical application request that downlink data amount is small, upstream data amount is big, small part low frequency subchannel is transmitted for transmitting order to lower levels,
Remaining most of subchannel is for uploading data transmission.
In the test process of initialization, modulation /demodulation module analyzes communication, determines the channel used and is used for
The frequency of data transmission, selects optimal transmission channel by calculating the signal-to-noise ratio (SNR) of each channel, has lower SNR
Channel be dropped and do not use.Based on these information, modulation /demodulation module also calculates the bit number that each channel is sent.It is preferred that
Ground, in the implementation, channel quality are related with cable length and cable quality.
Preferably, with RS (Reed-Solomon) coding for realizing DSL in FPGA, RS coding is a kind of with relatively strong
The important linear block codes of one of the multi-system Bose-Chaudhuri-Hocquenghem Code of error correcting capability and error control domain can both correct random
Mistake, and burst error can be corrected.RS coder is widely used in communication and storage system, solves data in high-speed memory
The problem of reliability.
Preferably, as shown in figure 3, the bus of one DSP of FPGA interior design, in FPGA piece/piece outer mold piece between use
Dsp bus accesses, in piece/piece outer mold piece includes data exchange buffering for swapping with upper end data, and it can be complete
At the data exchange between the upload data of the transmitting order to lower levels of front end and reception and demodulation.RS coding, RS are used in data communication
Encoded control module is completed to realize these functions with FPGA to sending data and receiving the forward error correction coding and decoding processing of data
The reliability of data transmission not only can be improved, and execution efficiency is high, data throughout is big.
Further, using the in-built RAM electricity of FPGA between modulation /demodulation module and logging instrument data interface module
Road carries out data sharing and exchange data.There are two 16 BITBUS network interfaces, modulation /demodulation module and logging instrument data for RAM circuit tool
Interface module connects the two bus interface respectively, and can access the memory space of RAM completely.Modulation /demodulation module and well logging
Instrument data interface module will need the data exchanged according to each customized space in the agreement write-in RAM set, and operate RAM
Specified register to generate a hardware pulse, for notifying another party to have new data, another party receives this pulse for the pulse
After read particular register, and the new data of RAM is read according to agreement.It is modulation /demodulation module and logging instrument with the advantages of this programme
Data interface module respectively works independently, and exchange data are independent of each other, and work efficiency is high, will not generate timing conflict.
Further, logging instrument data interface module uses using high speed arm processor as core and realizes that Ethernet, CAN are total
Line interface.When preferably, using Ethernet interface, realize Ethernet data transparent transmission function, i.e., no matter logger end ether
Network interface can be communicated using which kind of application layer protocol by the present apparatus and ground system, be ground using the advantages of this scheme
It is in consolidated network between system and downhole logging instrument, the access downhole logging instruments that ground system can be convenient are all
Network application can use, and do not have to pass through which kind of transmission medium among consideration and used which kind of transmission method.
The present invention realizes that downhole logging instruments carry out the function of high-speed data communications by logging cable and ground system, leads to
News rate can reach 1Mbps or more on 7000 meters of logging cables, while adaptive using 10/100M between the present invention and logger
Ethernet or CAN interface are answered, is in consolidated network between ground system and downhole logging instrument, ground system can be convenient
Access downhole logging instruments, all network applications can use, and do not have to consider it is intermediate by which kind of transmission medium and
Which kind of transmission method is used, the present apparatus can continue working under 175 DEG C of environment.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, also do not limit the specific embodiment of the invention.Obviously, according to the content of this specification, can make very much
Modifications and variations.These embodiments are chosen and specifically described to this specification, be principle in order to better explain the present invention and
Practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only wanted by right
Ask the limitation of book and its full scope and equivalent.
Claims (6)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338962.2A CN109441436A (en) | 2018-11-12 | 2018-11-12 | A kind of logging cable high-speed data communications device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811338962.2A CN109441436A (en) | 2018-11-12 | 2018-11-12 | A kind of logging cable high-speed data communications device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671098A (en) * | 2019-09-25 | 2020-01-10 | 中国科学院地质与地球物理研究所 | A single-core bus circuit device under drilling while drilling |
| CN116132211A (en) * | 2021-11-12 | 2023-05-16 | 中国石油天然气集团有限公司 | Data transmission method, system and equipment of array receiving acoustic logging instrument |
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| US5140318A (en) * | 1991-04-12 | 1992-08-18 | Conoco Inc. | Data transmission system for downhole logging tools |
| EP2469308A1 (en) * | 2010-12-23 | 2012-06-27 | Welltec A/S | A downhole well-operation system |
| CN102839971A (en) * | 2011-06-21 | 2012-12-26 | 中国石油集团长城钻探工程有限公司 | Downhole logging instrumental bus system based on coaxial cable Ethernet and logging method |
| CN202850989U (en) * | 2012-09-21 | 2013-04-03 | 中国海洋石油总公司 | High speed data transmission system based on single-core logging cable |
| CN203978425U (en) * | 2014-05-21 | 2014-12-03 | 青岛杰瑞自动化有限公司 | A kind of wireline logging HRT high-rate telemetry communication apparatus |
| US20160123138A1 (en) * | 2013-05-20 | 2016-05-05 | Arena Petro Ltd. | Highly-integrated well logging surface system |
| CN207867701U (en) * | 2018-02-07 | 2018-09-14 | 西安思坦仪器股份有限公司 | A kind of data rapid transmission system suitable for single-cord well logging cable |
| CN209129603U (en) * | 2018-11-12 | 2019-07-19 | 连云港杰瑞自动化有限公司 | A kind of logging cable high-speed data communications device |
-
2018
- 2018-11-12 CN CN201811338962.2A patent/CN109441436A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5140318A (en) * | 1991-04-12 | 1992-08-18 | Conoco Inc. | Data transmission system for downhole logging tools |
| EP2469308A1 (en) * | 2010-12-23 | 2012-06-27 | Welltec A/S | A downhole well-operation system |
| CN102839971A (en) * | 2011-06-21 | 2012-12-26 | 中国石油集团长城钻探工程有限公司 | Downhole logging instrumental bus system based on coaxial cable Ethernet and logging method |
| CN202850989U (en) * | 2012-09-21 | 2013-04-03 | 中国海洋石油总公司 | High speed data transmission system based on single-core logging cable |
| US20160123138A1 (en) * | 2013-05-20 | 2016-05-05 | Arena Petro Ltd. | Highly-integrated well logging surface system |
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| CN209129603U (en) * | 2018-11-12 | 2019-07-19 | 连云港杰瑞自动化有限公司 | A kind of logging cable high-speed data communications device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671098A (en) * | 2019-09-25 | 2020-01-10 | 中国科学院地质与地球物理研究所 | A single-core bus circuit device under drilling while drilling |
| CN110671098B (en) * | 2019-09-25 | 2021-07-20 | 中国科学院地质与地球物理研究所 | A single-core bus circuit device for drilling while drilling |
| CN116132211A (en) * | 2021-11-12 | 2023-05-16 | 中国石油天然气集团有限公司 | Data transmission method, system and equipment of array receiving acoustic logging instrument |
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