CN109828016A - A kind of electric pole type crude oil salinity real-time detector - Google Patents
A kind of electric pole type crude oil salinity real-time detector Download PDFInfo
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- CN109828016A CN109828016A CN201910051853.0A CN201910051853A CN109828016A CN 109828016 A CN109828016 A CN 109828016A CN 201910051853 A CN201910051853 A CN 201910051853A CN 109828016 A CN109828016 A CN 109828016A
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- crude oil
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Abstract
The present invention devises a kind of electric pole type crude oil salinity real-time detector, comprising: signal acquisition part, signal processing and signal hop three parts composition.Signal acquisition part point includes salinity signal acquisition module and temperature signal collection module.Signal processing includes constant-current source excitation module, adaptive gear switch module, signal amplification module, RMS conversion module.Apply constant current sinusoidal excitation signal in excitation electrode one end in measurement, constant current sinusoidal excitation signal is connected to the ground forming circuit by detected solution, to generate pressure drop in receiving electrode, the pressure drop and solution salinity that receiving electrode generates are linear, the pressure drop is sent to microprocessor and is filtered by amplification, RMS conversion, while temperature sensor is converted by A/D temperature signal being also sent to microprocessor.Microprocessor compensates input signal using the method for piecewise fitting, is sent to console on well by communication cable, to realize the real-time detection to crude oil salinity.
Description
Technical field
The present invention relates to sensor and detection technique fields, and in particular to a kind of high-temperature and high-presure resistent salinity real-time measurement
Instrument, mainly in the salinity for detecting oily downhole crude.
Background technique
Common salinity measuring instrument on Vehicles Collected from Market is to measure at normal temperatures and pressures to the salinity of liquid,
Although this measuring instrument precision is higher, volume is larger, and the factors such as inconvenient limit it in the adverse circumstances field such as oil field
Popularization.Most of oil field is mainly by pumping later again crude oil from underground to the measurement of crude oil salinity at present in China
It is measured with conventional salinity measuring instrument, this not only needs to consume a large amount of human and material resources, financial resources, also great
Limit crude oil production efficiency.
The sensor of measurement salinity salinity is broadly divided into electric pole type and inductance type at present, and electrode sensor is because of phase
Powered-down road is simple, easy to use, is widely used in salinity measurement, but in the prior art, to salinity sensor
Processing is mainly processed using tradition machinery, and machining accuracy is low, and yield rate is low, and processing cost is high, is not suitable for being widely applied.
In recent years, with the continuous development of 3D printing technique and embedded technology, more and more scientific workers start
Research can adapt to the salinity measuring instrument of subsurface environment, this volume and temperature resistant capability to salinity measuring instrument, resistance to pressure energy
Power and corrosion resistance propose harsh requirement.
Summary of the invention
The destruction of high temperature, hyperbaric environment to salinity measuring instrument under oil well in order to prevent, meanwhile, also for overcoming electrode
The influence of polarity effect and capacity effect to salinity measuring instrument precision, the invention patent devise a kind of integrated, miniaturization
Electric pole type crude oil salinity real-time detector, and have devised a kind of temperature compensator, adapt to underground high temperature and pressure to reach
Environment and the purpose that precise measurement is carried out to solution.The content of the invention patent mainly includes hard to salinity sensor and correlation
The design of part circuit and three aspects of relevant temperature-compensating are carried out to solution salinity.
The design aspect of salinity sensor, the sensor is by seven electrodes, support and temperature sensor three parts group
At.The shape of electrode is an annulus with lead, and support is composed of eight hollow cylinders using connected structure, seven
Electrode annulus is parallel and is equidistantly arranged on the inside of support, and lead side connects external circuit by the body aperture supported.Together
When, temperature sensor, which is embedded in outside the support of the lead other side, to be directly connected with external circuit.
It selects high-purity platinum as electrode fabrication material, is primarily due to its chemical property and stablizes, it can be in high temperature ring
Redox reaction, and easy processing are not carried out under border with solution, conductive capability is good, and polytetrafluoroethylene (PTFE) is selected to make as support
Material is primarily due to it with good volume insulating capacity, and breakdown voltage is big, and thermal stability is good, does not allow at high temperature
It is easily-deformable.Temperature sensor uses PT1000 platinum resistance sensor, it has good waterproof pressure ability, and precision
It is high.
Sensor measurement principle: in seven electrodes of the sensor, intermediate electrode is excitation electrode, is connected to hardware electricity
Two electrodes of the excitation module in road, two sides are directly grounded, and two circuits are formed inside support, remaining four electrode is
Receiving electrode.When there is constant current drive source forcing to motivate electrode, two pairs of receiving electrodes will generate pressure drop, the pressure drop and solution mine
Change degree is linear, to measure the salinity of crude oil by the pressure drop of measurement sensor output.
Hardware circuit is made of signal excitation module, signal processing module and signal transmission module three parts, wherein signal
And excitation module is made of sinusoidal signal generation circuit, constant current drive circuit and adaptive gear switch circuit three parts, signal
Processing module mainly includes voltage signal amplifying circuit, true effective value converting circuit and A/D conversion circuit three parts composition, signal
Transmission module mainly includes 485 level shifting circuits.
Salinity sensor signal flows to relationship are as follows: sinusoidal signal generation circuit generates sinusoidal ac signal, simple alternating current
Signal generates the sinusoidal signal that frequency duplication is stable, electric current is constant after amplifying circuit amplification and constant current drive processing of circuit,
The sinusoidal signal reaches the excitation electrode of salinity sensor after the range resistance controlled by analog switch, thus at two pairs
Pressure drop is generated on receiving electrode.Two-way pressure drop addition is integrated into all the way by the two-stage instrument amplifier of signal processing module, the electricity
Pressure drop is sent to microprocessor by true effective value converting circuit and is filtered, meanwhile, the collected signal of temperature sensor passes through
A/D conversion circuit transmission most processor, microprocessor carry out corresponding temperature-compensating according to collected voltage value, pass through control
The value of signal transmission module output room temperature salinity processed.
The gear self-adaptive control module use fuzzy control rule, from high salinity gear to low mineralization gear according to
Secondary switching.
The temperature-compensating uses binary nonlinear backoff algorithm using temperature and voltage as input quantity, is output with salinity
Amount, backoff algorithm model use piecewise fitting method.
The beneficial effects of the present invention are:
(1) support of salinity sensor is stablized using chemical property, and material with high hardness has been made by 3D printing
At allowing electrode and temperature sensor to be attached to the integration and miniaturization for being conducive to salinity sensor above.
(2) support is composed by monomer grafting, is conducive to the cleaning and maintenance work of salinity sensor, and
Even if some breaks down, faulty part can also be only replaced, maintenance cost is greatly reduced.
(3) polarization of electrode effect and capacity effect are effectively overcome using seven electrode measurement structures.
(4) measurement range of salinity sensor is effectively enhanced by gear switch, increases its market adaptability.
Detailed description of the invention
Fig. 1 is a kind of overall structure figure of underground salinity measuring instrument of the present invention.
Fig. 2 is support internal structure chart.
Fig. 3 is support outside drawing
Fig. 4 is signal flow graph.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
As shown in Figure 1, the salinity measuring instrument includes that signal acquisition module design, signal processing module design and signal pass
Defeated module design three parts composition.Signal acquisition module design includes salinity signal acquisition module and temperature signal collection mould
Block, wherein V1 and V2 is the pressure drop on two pairs of receiving electrodes, is the output signal of sensor.Signal processing includes constant-current source
Excitation module, adaptive gear switch module, signal amplification module, RMS conversion module.Signal transmission module is mainly
485 level conversions are carried out to output signal, pass through communication cable and extraneous communication.
As shown in Fig. 2, the design aspect of salinity sensor, the sensor is by seven electrodes, support and temperature sensing
Device three parts composition.The shape of electrode is an annulus with lead, and support uses connected structure group by eight hollow cylinders
It closes, seven electrode annulus are parallel and are equidistantly arranged on the inside of support, the body aperture connection that lead side passes through support
External circuit.
As shown in figure 3, seven contact conductors are packaged into one, drawn from contact conductor mouth, temperature sensor, which is embedded in, to be drawn
In the slot of the line other side and signal wire is drawn, crude oil circulates from support access mouth.
As shown in figure 4, salinity sensor signal flows to relationship are as follows: sinusoidal signal generation circuit generates sinusoidal excitation letter
Number, which reaches the excitation electrode of salinity sensor after the range resistance controlled by analog switch, thus
Pressure drop is generated on two pairs of receiving electrodes.Two-way pressure drop addition is integrated into all the way by the two-stage instrument amplifier of signal processing module,
The voltage drop send the pin for carrying A/D function to microprocessor to be filtered by true effective value converting circuit, meanwhile, temperature passes
The collected signal of sensor transmits the SPI mouth of most processor by A/D conversion circuit, and microprocessor is according to collected voltage
Value carries out corresponding temperature-compensating, and the value of room temperature salinity is exported by control signal transmission module.
Claims (3)
1. a kind of electric pole type crude oil salinity real-time detector, it is characterised in that: including signal acquisition module, signal processing mould
Block, signal transmission module three parts, signal acquisition module are made of salinity sensor and temperature sensor, are placed in oil well and are surveyed
The water diversion part of inserting tube, signal processing module and data transmission module are placed in the sealing pressure part of exploration pipe, signal processing
Module is made of the adaptive switching circuit of gear, instruction amplifying circuit, RMS-DC converter circuit, microprocessor, and signal transmits mould
Block is using 485 communications.
Sensor measurement principle and signal flow relationship are as follows: be all the way the collected signal of salinity sensor by amplifying, having
Valid value is transferred into microprocessor, and microprocessor is filtered it, and another way is that the collected signal of temperature sensor passes through
AD conversion module enters microprocessor, and microprocessor is sent to ground control cabinet after carrying out temperature-compensating to crude oil salinity.
2. a kind of electric pole type crude oil salinity real-time detector according to claim 1, it is characterised in that: the salinity
Sensor is made of seven electrodes and support, and seven electrodes are fixed on the inside of support, energy stable using chemical property, conductive
Material of the strong material of power as production electrode, using the material that hardness is high, insulating capacity is good and corrosion resistance is strong as system
Make the material of support.
3. a kind of electric pole type crude oil salinity real-time detector according to claim 1, it is characterised in that: the temperature passes
Sensor is embedded on the outside of support, using pressure-resistant, corrosion-resistant and water proof type temperature sensor probe as temperature compensation element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910051853.0A CN109828016B (en) | 2019-01-21 | 2019-01-21 | Electrode type crude oil mineralization real-time detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910051853.0A CN109828016B (en) | 2019-01-21 | 2019-01-21 | Electrode type crude oil mineralization real-time detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109828016A true CN109828016A (en) | 2019-05-31 |
| CN109828016B CN109828016B (en) | 2021-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910051853.0A Active CN109828016B (en) | 2019-01-21 | 2019-01-21 | Electrode type crude oil mineralization real-time detector |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4833413A (en) * | 1988-04-01 | 1989-05-23 | Head Michael J | Salinity measuring system |
| CN104280430A (en) * | 2014-10-14 | 2015-01-14 | 西安理工大学 | Device and method for measuring water content in crude oil |
| CN108303450A (en) * | 2018-03-01 | 2018-07-20 | 中国地质调查局南京地质调查中心 | Quick real-time dynamic monitoring degree of mineralization of ground water device and its working method |
| CN207850971U (en) * | 2018-03-01 | 2018-09-11 | 中国地质调查局南京地质调查中心 | Quick real-time dynamic monitoring degree of mineralization of ground water device |
| CN109187649A (en) * | 2018-08-14 | 2019-01-11 | 天津大学 | Moisture content and salinity measuring device based on the anti-sensor of plug-in resistance type |
-
2019
- 2019-01-21 CN CN201910051853.0A patent/CN109828016B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4833413A (en) * | 1988-04-01 | 1989-05-23 | Head Michael J | Salinity measuring system |
| CN104280430A (en) * | 2014-10-14 | 2015-01-14 | 西安理工大学 | Device and method for measuring water content in crude oil |
| CN108303450A (en) * | 2018-03-01 | 2018-07-20 | 中国地质调查局南京地质调查中心 | Quick real-time dynamic monitoring degree of mineralization of ground water device and its working method |
| CN207850971U (en) * | 2018-03-01 | 2018-09-11 | 中国地质调查局南京地质调查中心 | Quick real-time dynamic monitoring degree of mineralization of ground water device |
| CN109187649A (en) * | 2018-08-14 | 2019-01-11 | 天津大学 | Moisture content and salinity measuring device based on the anti-sensor of plug-in resistance type |
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| CN109828016B (en) | 2021-03-26 |
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