CN108333638A - A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system - Google Patents
A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system Download PDFInfo
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- CN108333638A CN108333638A CN201810348067.2A CN201810348067A CN108333638A CN 108333638 A CN108333638 A CN 108333638A CN 201810348067 A CN201810348067 A CN 201810348067A CN 108333638 A CN108333638 A CN 108333638A
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- MOWMLACGTDMJRV-UHFFFAOYSA-N nickel tungsten Chemical compound [Ni].[W] MOWMLACGTDMJRV-UHFFFAOYSA-N 0.000 claims description 4
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- 238000005516 engineering process Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
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- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
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- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
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- 239000003129 oil well Substances 0.000 description 2
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- G—PHYSICS
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
- G01V5/04—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
- G01V5/08—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
- G01V5/14—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using a combination of several sources, e.g. a neutron and a gamma source
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system, including telecommunication filtration component, low-tension supply component, observing and controlling component, amplifier module, probe assembly, ion source component, accelerator for neutron production, target voltage drive component, and ground system, telecommunication filtration component passes through cable connection ground system, low-tension supply component connecting communication filtering unit, observing and controlling component, amplifier module, probe assembly, amplifier module connects probe assembly, observing and controlling component connects accelerator for neutron production, ion source component and target voltage drive component, accelerator for neutron production connects ion source component and target voltage drive component, observing and controlling component connecting communication filtering unit and amplifier module.Well logging can be done directly in oil pipe, single, which is gone into the well, obtains a variety of formation informations, reduce logging cost, expand the application range of instrument, and add the pattern of single thermal-neutron detector using single gamma detector, saturation degree well logging and neutron life time log, quantitative reaction oil saturation, identification gas-bearing formation etc. can be completed at the same time.
Description
Technical field
The present invention relates to saturation degree logging instrument more particularly to a kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument systems
System.
Background technology
Traditional pulsed neutron saturation degree logging instrument using double source away from gamma detection technology and C/O meanss of interpretation, at present
Only with long long distance data, and may be only available for the stratum of 25% or more porosity ＞, water flooding degree qualitative can only be solved
It is interpreted as weak, medium, strong grade.Existing saturation degree logging instrument diameter is all φ 90mm or so, can be only applied in casing measure, though
It is so all nominal to obtain different formation informations, but primary go into the well can only obtain a kind of formation information, and affiliated core component
In the accelerator for neutron production service life≤100h, accelerator for neutron production must just be replaced by surveying more than ten mouthfuls of wells, cause production logging expensive.It is another
Aspect, existing saturation degree logging instrument uses and double source is away from gamma detection technology or double thermal neutron detection technologies, under primary
Well can only obtain a kind of formation information, cannot be completed at the same time oil saturation, formation lithology and the measurement for identifying gas-bearing formation.
Invention content
A kind of minor diameter C/Hratio saturation degree downhole instrument of present invention offer and logging instrument system, to solve the above-mentioned prior art
Defect, can be done directly logging tasks in oil pipe, single, which is gone into the well, obtains a variety of formation informations, reduce production logging at
This, expands the application range of instrument, and adds the pattern of single thermal-neutron detector using single gamma detector, can be completed at the same time
Saturation degree is logged well and neutron life time log, quantitative reaction oil saturation, identification gas-bearing formation etc..
In order to achieve the object of the present invention, intend using following technology：
A kind of minor diameter C/Hratio saturation degree downhole instrument, which is characterized in that logical in shell including being set in turn in from top to bottom
Interrogate filtering unit, low-tension supply component, observing and controlling component, amplifier module, probe assembly, ion source component, accelerator for neutron production, target voltage
Drive component, the telecommunication filtration component are surveyed by cable connection ground system, low-tension supply component connecting communication filtering unit
Component, amplifier module, probe assembly are controlled, amplifier module connects probe assembly, and observing and controlling component connects accelerator for neutron production, ion source group
Part and target voltage drive component, accelerator for neutron production connect ion source component and target voltage drive component, the filtering of observing and controlling component connecting communication
Component and amplifier module, wherein：
Telecommunication filtration component establishes communication link and power transmission lines between downhole instrument and ground system, to electricity by cable
The communication signal of cable decaying is adjusted, and is filtered to the input and output of low-tension supply component；
Low-tension supply component provides ± 15V and 5V power supplys for observing and controlling component, telecommunication filtration component, amplifier module, probe assembly；
Observing and controlling component, the instruction that decoding ground system issues control the driving output of target voltage drive component and ion source component, adopt
The data for collecting probe assembly, read the running parameter of accelerator for neutron production, store and upload data to ground system；
Amplifier module is amplified shaping to the pulse signal of probe assembly output and send to observing and controlling component, and is probe assembly
Probe provide needed for high voltage power supply；
Probe assembly includes the NaI probes that the Characteristic γ ray that stratum element emits is converted to electric impulse signal, and will be hot
Neutron signal is converted into the He3 probes of electric impulse signal；
Ion source component provides heater current and anodic pulse for accelerator for neutron production, acquires the value of heater current and ion stream simultaneously
It is uploaded to observing and controlling component；
Accelerator for neutron production is controlled by ion source component and target voltage drive component, generates the high energy pulse neutron of 14Mev；
Target voltage drive component provides target voltage drive signal for accelerator for neutron production, acquires the value of target voltage sampled signal and is uploaded to survey
Control component.
Further, the ion source component is integrated with shield shell design, and the shield shell uses tungsten nickel
Material.
Further, the telecommunication filtration component, observing and controlling component, amplifier module, probe assembly setting keep the temperature pressure-bearing one
In bottle.Heat preservation pressure-bearing bottle is vacuum insulation bottle, pressure-bearing 100Mpa, temperature≤85 in 8h bottles of continuous work at 175 DEG C of environment temperature
℃。
Further, the observing and controlling component is FPGA controller, including fpga chip, STD-1553MIL codecs, gal
Horse signal picker, thermal neutron pulse signal acquisition device, ion source controller, target voltage drive control device.
Further, the amplifier module includes gamma signal amplifier, thermal neutron pulse signal extractor, Yi Jiwei
NaI pops one's head in and the high-pressure modular of He3 probe offer high voltage power supplies.
Further, a diameter of φ 43mm of the downhole instrument.
Further, the accelerator for neutron production uses the generator of neutron tube lifetime >=1000h.
A kind of minor diameter C/Hratio saturation degree logging instrument system, which is characterized in that hydrocarbon including previously described minor diameter
Further include ground system than saturation degree downhole instrument, the ground system includes：It is mounted with the cable being connect with telecommunication filtration component
Vehicle-mounted cable trough, the ground power supply with the cable connection of vehicle-mounted cable trough, the ground numerical control component being connect with ground power supply and
Ground controls computer, and ground numerical control component connects the cable of vehicle-mounted cable trough, wherein：
Ground power supply is the desk-top power supply of 0 ~ 300V/1A of single channel or two-way, to provide electricity for downhole instrument and ground system
Source；
Ground numerical control component is communicated by the cable and telecommunication filtration component of vehicle-mounted cable trough, uploads or assign ground control electricity
Data between brain and downhole instrument or instruction acquire cable stretch signal, calculate well depth and logging speed；
Ground controls computer, provides a personal-machine interactive interface, controls the work of whole system, earthward numerical control component assigns finger
It enables, and the data uploaded to ground numerical control component calculate, draws real-time power spectrum figure, display well logging real-time curve.
The beneficial effects of the invention are as follows：
1, diameter is small, may be directly applied in oil pipe, simplifies logging operation, reduces production cost；
2, domestic and international logger probe assembly combination is mainly double source away from gamma detector and double thermal-neutron detectors.Double source
It is mainly used for measuring gamma spectrum away from gamma detector, is mainly used in oil saturation well logging；Double thermal-neutron detectors are mainly used for
Sub-count is hankered in measurement, is mainly used in thermal-neutron lifetime measurement, is found gas-bearing formation.This programme adds list using single gamma detector
The pattern of a thermal-neutron detector, can be completed at the same time saturation degree well logging and neutron life time log, quantitative reaction oil saturation,
Identify gas-bearing formation etc.；
3, traditional logging instrument, mostly uses carbon-to-oxygen ratio C/O meanss of interpretation, under conditions of porosity ＞ 20%, ability quantitative interpretation
Layer oil saturation, and can be only applied in low mineralization environment, it is indefinite to the grade classification of Water Flooding Layer；This programme is available
In realization C/Hratio C/H meanss of interpretation, under conditions of porosity ＞ 2%, and under conditions of salinity ＜ 300000PPM
Energy quantitative interpretation stratum oil saturation, is divided into weak water logging, middle water logging, strong water logging etc. by Water Flooding Layer；
4, during carrying out diameter diminution, in order to ensure the source of probe assembly away from by the drive control of accelerator for neutron production point
At ion source component and target voltage drive component, structure is changed simultaneously, ion source component and shield shell are designed into integral, shielding
Shell uses tungsten nickel material, shields neutron, avoids neutron from passing through heat preservation pressure-bearing bottle activation probe assembly, solves shield
The problem of outlet difficulty；
5, since the output pulse amplitude of probe assembly varies with temperature very greatly, the spectrum stripping of ground system can be influenced, therefore will communication
Filtering unit, observing and controlling component, amplifier module, probe assembly are placed in vacuum flask, and since diameter limits, heat preservation and pressure-bearing are set
Meter is integral, constitutes heat preservation pressure-bearing bottle, solves the letter of heat preservation pressure-bearing shell and ion source component, target voltage drive component etc. as a result,
Number transmission problem；
6, current Nuclear Logging Tools both domestic and external, though there are many operating mode, primary go into the well can only obtain a kind of parameter, and
Domestic instrument cannot identify gas-bearing formation.The application of this programme, primary well logging can obtain stratum characteristic gamma spectra and neutron longevity simultaneously
Parameter is ordered, on the basis of using C/Hratio means of interpretation, utilizes He3 probes, amplifier module, observing and controlling component tie surface system
Formation capture cross section curve can be increased, to identify oil reservoir, gas-bearing formation, determine stratum oil saturation, lithology, hole
Geology and the engineering parameter such as degree and water flooding degree.
Description of the drawings
Fig. 1 is the minor diameter C/Hratio saturation degree downhole instrument overall structure diagram of the present invention.
Fig. 2 is each component electric connecting relation figure of minor diameter C/Hratio saturation degree downhole instrument of the present invention.
Fig. 3 is the minor diameter C/Hratio saturation degree logging instrument overall system architecture schematic diagram of the present invention.
Fig. 4 is the minor diameter C/Hratio saturation degree logging instrument system components electric connecting relation figure of the present invention.
Fig. 5 is the carrying of minor diameter C/Hratio saturation degree the logging instrument system monitoring component and telecommunication filtration component of the present invention
The structure top view of circuit board framework.
Fig. 6 is the carrying of minor diameter C/Hratio saturation degree the logging instrument system monitoring component and telecommunication filtration component of the present invention
The structural side view of circuit board framework.
Wherein, 0- downhole instruments, 01- oil well casings, the vehicle-mounted cable troughs of 02-, 03- ground power supplies, 04- ground numerical control components,
The ground 05- controls computer, 1- telecommunication filtration components, 2- low-tension supply components, 3- observing and controlling components, 4- amplifier modules, 5- detection groups
Part, 51-He3 probes, 52-NaI probes, 6- ion source components, 7- accelerators for neutron production, 8- target voltages drive component, 9- circuit tabulares
Frame, 92- observing and controlling components supporting region, 91- telecommunication filtration components supporting region, the groove milling of the bottoms 93- aluminium bar.
Specific implementation mode
As shown in Figure 1 and 2, a kind of minor diameter C/Hratio saturation degree downhole instrument 0, including it is set in turn in shell from top to bottom
Interior telecommunication filtration component 1, low-tension supply component 2, observing and controlling component 3, amplifier module 4, probe assembly 5, ion source component 6, in
Electronic generator 7, target voltage drive component 8, for telecommunication filtration component 1 by cable connection ground system, the connection of low-tension supply component 2 is logical
Filtering unit 1, observing and controlling component 3, amplifier module 4, probe assembly 5 are interrogated, amplifier module 4 connects probe assembly 5, and observing and controlling component 3 connects
Ion source component 6 and target voltage drive component 8 are connect, accelerator for neutron production 7 connects ion source component 6 and target voltage drive component 8, observing and controlling group
3 connecting communication filtering unit 1 of part and amplifier module 4.
Probe assembly 5 includes the NaI probes 52 that the Characteristic γ ray that stratum element emits is converted to electric impulse signal,
And by hanker subsignal be converted into electric impulse signal He3 probe 51.
Telecommunication filtration component 1 establishes communication link and power transmission lines between downhole instrument and ground system by cable,
Communication signal and electric power to cable attenuation are filtered adjustment, and communication signal is transferred to observing and controlling component 3 after filtering, by electric power
It is transferred to low-tension supply component 2, ion source component 6, target voltage drive component 8.Telecommunication filtration component 1 receives observing and controlling component 3 simultaneously
The data-signal of upload is transferred to ground system after amplification.
Ion source component 6 using microcontroller and connect with microcontroller anodic pulse generation circuit, constant current source current, from
Subflow and heater current Acquisition Circuit are realized, heater current and anodic pulse, acquisition filament electricity are provided for accelerator for neutron production 7
The value of stream and ion stream is simultaneously uploaded to observing and controlling component 3.
Target voltage drive component 8 using microcontroller and connect with microcontroller target voltage driving circuit, target voltage sample circuit into
Row is realized, target voltage drive signal is provided for accelerator for neutron production 7, is acquired the value of target voltage sampled signal and is uploaded to observing and controlling component 3.
Ion source component 6 and target voltage drive component 8 generate the drive signal needed for accelerator for neutron production 7, make accelerator for neutron production 7
Generate the high energy pulse neutron of 14Mev.
Low-tension supply component 2 receives the electric power by being transmitted after the filtering of telecommunication filtration component 1, and by electrical power conversion, to survey
Component 3, telecommunication filtration component 1, amplifier module 4,5 offers of probe assembly ± 15V and 5V power supplys are provided.In the process of output power supply
In, while the filtering exported by telecommunication filtration component 1.
Amplifier module 4 includes gamma signal amplifier, thermal neutron pulse signal extractor, and is 52 and He3 of NaI probes
Probe 51 provides the high-pressure modular of high voltage power supply.Gamma signal amplifier is used for the 52 gamma-ray electric pulse of conversion of NaI probes
Signal is amplified and is transferred to observing and controlling component 3, and thermal neutron pulse signal extractor is used for 51 conversion thermal neutron letter of He3 probes
Number electric impulse signal be amplified and and be transferred to observing and controlling component 3.
Observing and controlling component 3 is FPGA controller, including fpga chip, and STD-1553MIL volumes connect with fpga chip
Decoder, gamma signal picker, thermal neutron pulse signal acquisition device, ion source controller, target voltage drive control device.STD-
1553MIL codecs are for decoding the instruction that ground system issues, and gamma signal picker is for acquiring the transmission of amplifier module 4
The 52 gamma-ray electric impulse signals of conversion of amplified NaI probes, thermal neutron pulse signal acquisition device is for acquiring amplification group
The electric impulse signal for the amplified He3 51 transition heat neutron signals of probe that part 4 transmits, ion source controller is for controlling ion
The driving of source component 6 exports, and target voltage drive control device is used to control the driving output of target voltage drive component 8 processed, fpga chip pair
Each device inside observing and controlling component 3 is controlled, and the signal of acquisition is stored, and reads the running parameter of accelerator for neutron production 7 and storage,
The signal of storage and parameter are transferred to telecommunication filtration component 1, ground system is uploaded to after being amplified by telecommunication filtration component 1.
Ion source component 6 is integrated with shield shell design, and the shield shell uses tungsten nickel material.The communication
Filtering unit 1, observing and controlling component 3, amplifier module 4, the setting of probe assembly 5 are in a heat preservation pressure-bearing bottle.Heat preservation pressure-bearing bottle is vacuum
Dewar bottle, pressure-bearing 100Mpa, temperature≤85 DEG C in 8h bottles of continuous work at 175 DEG C of environment temperature.Accelerator for neutron production 7 uses neutron
The generator of tube lifetime >=1000h.Downhole instrument diameter design is φ 43mm.
As shown in Fig. 3 ~ 4, a kind of minor diameter C/Hratio saturation degree logging instrument system, including a kind of above-mentioned minor diameter are hydrocarbon
Than saturation degree downhole instrument 0 and ground system.
Ground system includes：It is mounted with the vehicle-mounted cable trough 02 for the cable being connect with telecommunication filtration component 1, with vehicle-mounted cable
The ground power supply 04 of the cable connection of frame 02, the ground numerical control component 03 being connect with ground power supply 04 and ground control computer 05,
Ground numerical control component 03 connects the cable of vehicle-mounted cable trough 02.
Ground power supply 04 is the desk-top power supply of 0 ~ 300V/1A of single channel or two-way, to be carried for downhole instrument and ground system
Power supply source.
Ground numerical control component 03 is communicated by the cable and telecommunication filtration component 1 of vehicle-mounted cable trough 02, uploads or assign ground
Face controls data or instruction between computer 05 and downhole instrument, acquires cable stretch signal, calculates well depth and logging speed；Specifically
, ground numerical control component 03 controls computer 05 by cable and ground and communicates, ICP/IP protocol；With leading to for telecommunication filtration component 1
News, according to MIL-STD-1553B protocol encoding and decodings, message transmission rate is not less than 10Kb/S, passes through the electricity of vehicle-mounted cable trough 02
Cable is communicated with telecommunication filtration component 1；Signal acquisition：The Martin of real-time collecting vehicle download cable frame 02 wears gram signal and cable stretch letter
Number, real-time display depth-logger and logging speed.
Ground controls computer 05, provides a personal-machine interactive interface, controls the work of whole system, earthward numerical control component
03 assigns instruction, and the data uploaded to ground numerical control component 03 calculate, and draws real-time power spectrum figure, display well logging in real time
Curve.
Specific implementation mode：
One, it measures in place：Cable is connect with downhole instrument 0 using vehicle-mounted cable trough 02, and by be suitble to give directions fixed pulley into
The decentralization of row downhole instrument 0 is put in oil well casing 01 under direct and measures since downhole instrument diameter design is φ 43mm；Ground number
Control component 03 is acquired the tension signal of cable, and calculates well depth and logging speed, feeds back to ground control computer 05, behaviour
Make the control that personnel are transferred according to practical measurement demand.
Two, power supply and power transmission mode：Ground power supply 04 is the general supply of system, and electric power is provided for downhole instrument 0；Ground
Numerical control component 03, ground control computer 05 directly provide AC220V as electric power by logging truck.The tool of electric power is provided for downhole instrument 0
Body power transmission is the cable transmission by vehicle-mounted cable trough 02 to telecommunication filtration component 1, is drawn to cable by telecommunication filtration component 1
The decaying risen is transferred to low-tension supply component 2, ion source component 6, target voltage drive component 8 after being handled, wherein low-tension supply
Component 2 provides ± 15V and ﹢ 5V electricity by electrical power conversion, for observing and controlling component 3, telecommunication filtration component 1, amplifier module 4, probe assembly 5
Source, the high-pressure modular of amplifier module 4 into NaI 52 and He3 probes 51 of popping one's head in provide high voltage power supply, ion after being converted to electric power
Source component 6 is that accelerator for neutron production 7 provides heater current and anodic pulse, and target voltage drive component 8 is that accelerator for neutron production 7 provides target voltage
Drive signal, accelerator for neutron production 7 emit the high energy pulse neutron of 14MeV.
Three, the transmission mode of instruction issuing and signal acquisition：Operating personnel control the human-computer interaction of computer 05 by ground
Instruction is assigned at interface, and the response instruction of ground numerical control component 03 sends control instruction, communication by cable to telecommunication filtration component 1
Filtering unit 1 handles communication signal and is sent to observing and controlling component 3, and observing and controlling component 3 is decoded instruction, observing and controlling component 3
It is that accelerator for neutron production 7 provides operating condition according to instruction control target voltage drive component 8 and ion source component 6, makes accelerator for neutron production 7
Emit the high energy pulse neutron of 14MeV, neutron penetrates the media such as casing, cement sheath and reacted with stratum element, different elements and
Different reactions can occur for neutron, release the Characteristic γ ray of different-energy, the spy that 52 acquisition stratum element of NaI probes is sent out
Sign gamma-rays is simultaneously converted to electric impulse signal, and 51 acquisition of He3 probes hankers sub-count and is converted into electric impulse signal, amplifier module
The electric impulse signal of 4 pairs of probe assemblies 5 output is sent after being amplified shaping to observing and controlling component 3, and electric pulse is acquired by observing and controlling component 3
Signal is simultaneously transmitted to telecommunication filtration component 1, and telecommunication filtration component 1 is amplified data-signal, and is uploaded to ground by cable
Face numerical control component 03,03 feedback data signal of ground numerical control component control computer 05 to ground, and ground controls computer 05 to acquisition
Data carry out spectrum stripping calculating, be converted to the curves such as required C/O, C/H, Si/Ga, according to log, calculate stratum point
Oil saturation, water logging intensity, lithological profile, gas-bearing formation of layer etc. are as a result, for instructing oil reservoir, gas-bearing formation exploitation.
In order to obtain the size design of a diameter of φ 43, and heatproof is increased to 150 DEG C, this programme, which also uses, following wound
New solution：
One, in order to ensure the source of probe assembly away from the drive control of accelerator for neutron production is divided into ion source component and target voltage drives
Two components of component, change simultaneously structure, and ion source component and shield are designed integrally, and it is difficult to solve shield outlet
The problem of, and achieved the purpose that minification.
Two, prolateization designs circuit board, reduces circuit board size to match diameter；Due to reducing circuit board size, improve
Heat dissipation difficulty is taken for heat dissipation problem and increases heat dissipation area, heat source dislocation technical solution enhancing heat dissipation.Specifically：
1, in the scheme of traditional technology, by the way of liner plate mounted on top, heat source is concentrated for observing and controlling component and telecommunication filtration component,
It is unfavorable for radiating；This programme is separated using two components, as Fig. 5 ~ Fig. 6 show observing and controlling component and telecommunication filtration component
The structure of bearer circuit framework, bearer circuit framework 9 are equipped with the observing and controlling component supporting region 92 and telecommunication filtration being spaced
Component supporting region 91, and the heat dissipation of observing and controlling component supporting region 92 is using the aluminium bar 93 of bottom groove milling；
2, change the structure of ion source component.In the prior art, it mostly uses volume larger power module and low pressure is provided, and pass through
Conducting, cut-off after transformer booster diode rectification, then by metal-oxide-semiconductor control high pressure；It is changed to：It is boosted to by general 24V
700V, and after 3 grades of multiplication of voltages of use, metal-oxide-semiconductor controls the conducting of high pressure, cut-off, has further reduced the size of integrated circuit.
By above-mentioned two aspect, the size of component is reduced, realizes that prolateization designs circuit board, meets minor diameter requirement, together
When solve heat dissipation problem together.
Three, since the output pulse amplitude of probe assembly varies with temperature very greatly, the spectrum stripping of ground system can be influenced, therefore will
Telecommunication filtration component, observing and controlling component, amplifier module, probe assembly are placed in vacuum flask, since diameter limits, will be kept the temperature and are held
Pressure design is integral, constitutes heat preservation pressure-bearing bottle, only needs four with ion source component, target voltage drive component in vacuum flask as a result,
Line has selected a five core connectors, shield Front-end Design gap five core connectors of placement to be docked with heat preservation pressure-bearing shell, then
From the outlet of shield surface to ion source component, solves the letter of heat preservation pressure-bearing shell and ion source component, target voltage drive component etc.
Number transmission problem.
Four, this programme adds the scheme of single gamma detector using single thermal-neutron detector, compared to original two
The associated processing circuit of the scheme of gamma detector, gamma signal reduces half, and thermal neutron probe signal only needs to count, thus
The circuit for further simplifying observing and controlling component reduces the number of devices of observing and controlling component, is conducive to prolateization and designs circuit board, and drops
The low calorific value of component.
Five, current Nuclear Logging Tools both domestic and external, though there are many operating mode, primary go into the well can only obtain a seed ginseng
Number, and domestic instrument cannot identify gas-bearing formation.The application of this programme, primary well logging can obtain simultaneously stratum characteristic gamma spectra and
Neutron lifetime parameter, on the basis of using C/Hratio means of interpretation, ordinatedly using He3 probes, amplifier module, observing and controlling component
Plane system can increase formation capture cross section curve, to identify oil reservoir, gas-bearing formation, determine stratum oil saturation, rock
Geology and the engineering parameters such as property, porosity and water flooding degree.
Claims (10)
1. a kind of minor diameter C/Hratio saturation degree downhole instrument, which is characterized in that including being set in turn in shell from top to bottom
Telecommunication filtration component（1）, low-tension supply component（2）, observing and controlling component（3）, amplifier module（4）, probe assembly（5）, ion source group
Part（6）, accelerator for neutron production（7）, target voltage drive component（8）, wherein：
Telecommunication filtration component（1）, communication link and power transmission lines between downhole instrument and ground system are established by cable, it is right
The communication signal of cable attenuation is adjusted, and to low-tension supply component（2）Input and output be filtered；
Low-tension supply component（2）, it is observing and controlling component（3）, telecommunication filtration component（1）, amplifier module（4）, probe assembly（5）It provides
± 15V and 5V power supplys；
Observing and controlling component（3）, the instruction that decoding ground system issues, control target voltage drive component（8）And ion source component（6）Drive
Dynamic output, acquires probe assembly（5）Data, read accelerator for neutron production（7）Running parameter, store and upload data to ground
System；
Amplifier module（4）, to probe assembly（5）The pulse signal of output is amplified shaping and send to observing and controlling component（3）, and be
Probe assembly（5）Probe provide needed for high voltage power supply；
Probe assembly（5）, include the NaI probes that the Characteristic γ ray that stratum element emits is converted to electric impulse signal（52）,
And by hanker subsignal be converted into electric impulse signal He3 pop one's head in（51）；
Ion source component（6）, it is accelerator for neutron production（7）Heater current and anodic pulse are provided, heater current and ion stream are acquired
Value and be uploaded to observing and controlling component（3）；
Accelerator for neutron production（7）, by ion source component（6）With target voltage drive component（8）Control, generate the high energy pulse of 14Mev
Neutron；
Target voltage drive component（8）, it is accelerator for neutron production（7）There is provided target voltage drive signal, acquire target voltage sampled signal value and on
It is transmitted to observing and controlling component（3）.
2. minor diameter C/Hratio saturation degree downhole instrument according to claim 1, which is characterized in that the ion source component
（6）It is integrated with shield shell design, the shield shell uses tungsten nickel material.
3. minor diameter C/Hratio saturation degree downhole instrument according to claim 1, which is characterized in that the telecommunication filtration component
（1）, observing and controlling component（3）, amplifier module（4）, probe assembly（5）Setting is in a heat preservation pressure-bearing bottle.
4. minor diameter C/Hratio saturation degree downhole instrument according to claim 3, which is characterized in that the heat preservation pressure-bearing bottle is
Vacuum insulation bottle, pressure-bearing 100Mpa, temperature≤85 DEG C in 8h bottles of continuous work at 175 DEG C of environment temperature.
5. minor diameter C/Hratio saturation degree downhole instrument according to claim 1, it is characterised in that：The telecommunication filtration component
（1）Pass through cable connection ground system, low-tension supply component（2）Connecting communication filtering unit（1）, observing and controlling component（3）, amplification group
Part（4）, probe assembly（5）, amplifier module（4）Connect probe assembly（5）, observing and controlling component（3）Connect ion source component（6）And target
Press drive component（8）, accelerator for neutron production（7）Connect ion source component（6）With target voltage drive component（8）, observing and controlling component（3）Connection
Telecommunication filtration component（1）And amplifier module（4）.
6. minor diameter C/Hratio saturation degree downhole instrument according to claim 1, which is characterized in that the observing and controlling component（3）
It is adopted for FPGA controller, including fpga chip, STD-1553MIL codecs, gamma signal picker, thermal neutron pulse signal
Storage, ion source controller, target voltage drive control device.
7. minor diameter C/Hratio saturation degree downhole instrument according to claim 1, which is characterized in that the amplifier module（4）
It pops one's head in including gamma signal amplifier, thermal neutron pulse signal extractor, and for NaI（52）It pops one's head in He3（51）It provides high
The high-pressure modular of voltage source.
8. minor diameter C/Hratio saturation degree downhole instrument according to claim 1, which is characterized in that the downhole instrument is a diameter of
φ43mm。
9. minor diameter C/Hratio saturation degree downhole instrument according to claim 1, which is characterized in that the accelerator for neutron production
（7）Using the generator of neutron tube lifetime >=1000h.
10. one kind including the minor diameter C/Hratio saturation degree logging instrument system of any one of claim 1 ~ 9 downhole instrument,
It is characterized in that, further including ground system, the ground system includes：It is mounted with and telecommunication filtration component（1）The cable of connection
Vehicle-mounted cable trough（02）, with vehicle-mounted cable trough（02）Cable connection ground power supply（04）, with ground power supply（04）Connection
Ground numerical control component（03）Computer is controlled with ground（05）, ground numerical control component（03）Connect vehicle-mounted cable trough（02）Electricity
Cable, wherein：
Ground power supply（04）, it is the desk-top power supply of 0 ~ 300V/1A of single channel or two-way, to be provided for downhole instrument and ground system
Power supply；
Ground numerical control component（03）, pass through vehicle-mounted cable trough（02）Cable and telecommunication filtration component（1）Communication, uploads or assigns
Ground controls computer（05）Data between downhole instrument or instruction acquire cable stretch signal, calculate well depth and logging speed；
Ground controls computer（05）, a personal-machine interactive interface is provided, controls the work of whole system, earthward numerical control component
（03）Instruction is assigned, and to ground numerical control component（03）The data of upload are calculated, and real-time power spectrum figure, display well logging are drawn
Real-time curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348067.2A CN108333638A (en) | 2018-04-18 | 2018-04-18 | A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810348067.2A CN108333638A (en) | 2018-04-18 | 2018-04-18 | A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108333638A true CN108333638A (en) | 2018-07-27 |
Family
ID=62933401
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810348067.2A Pending CN108333638A (en) | 2018-04-18 | 2018-04-18 | A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system |
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| CN (1) | CN108333638A (en) |
Cited By (2)
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| CN111751893A (en) * | 2020-05-26 | 2020-10-09 | 中国石油天然气集团有限公司 | Neutron generator nipple simulation device |
| CN112558183A (en) * | 2020-12-02 | 2021-03-26 | 中国石油天然气集团有限公司 | Neutron generator short section simulation device based on single chip microcomputer |
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| CN208488556U (en) * | 2018-04-18 | 2019-02-12 | 四川久天测控技术有限公司 | A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system |
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