CN205638419U - Storing up storehouse towards salt cave dissolves online monitored control system in chamber - Google Patents

Abstract

The utility model provides a storing up storehouse towards salt cave dissolves online monitored control system in chamber, the device is including ground unit and unit in the pit, adopt ultra -large programmable logic device and embedded soft nuclear microprocessor, make the high integration of instrument in the pit, adopt the probe -type sensor simultaneously, the bottleneck in narrow space has been overcome, the problem of place measuring device in little wellhole annular space is solved, the development of dissolving chamber technology has been impeld at to a great extent, the device is through having set for a set of not isometric probe, utilize reference length fixed between the capacitor plate, dynamic verification goes out the dielectric constant of the brine that the probe is located, the automatic scale of control in -process in chamber to capacitive sensor has been realized dissolving, eliminate traditional electric capacity detection method and leaded to dielectric constant to change the influence to measuring result because the salinity changes, the erroneous judgement problem of cavity roof form has been solved effectively.

Description

A kind of online monitoring system towards the molten chamber of bank, salt cave

Technical field

This utility model relates to liquid measure and field of intelligent control, particularly relates to a kind of molten towards salt cave bank The online monitoring system in chamber.

Background technology

Salt cavern underground storage is to utilize water-soluble mode to form cave in subterraneous salt deposit or salt dome, for storing natural A kind of underground installation of the medium such as gas, crude oil.Compared with traditional above-ground storage tank, salt cavern underground storage is because having Deposit scale is big, safety is high and takes up an area the advantages such as few.Therefore, it becomes the excellent of oil reserve construction of base Select save scheme.It is the longest in the bank building course of salt cave, that technology is the most complicated one for making chamber engineering Technology.The problem that it includes two cores: one is how to build a stable cavity geometry；How two be Improve salt cave and make chamber speed.For how building stable cavity geometry, comprise again two crucial technology: one Being cavity geometry design, two is to make the control of cavity form during chamber.In cavity course of dissolution, due to weight Power differentiation, causes longitudinal top salt deposit to dissolve relatively fast, and horizontal salt deposit dissolves relatively slow, if do not adopted Taking control measure, salt deposit top will quickly be dissolved, thus, it is unsatisfactory for the form required by bank.

The purpose of Project Realization is, detects cavity ceiling location during molten chamber, obtains a reflection The real-time curve of cavity ceiling height.Utilize salt deposit not dissolve in oil but be dissolved in the characteristic of water, cavity adds bavin Oil as interleaving agent, cuts off cavity top salt deposit directly and fresh water into contact.Therefore, by making bavin during chamber Oil and the interfacial on-line checking of fresh water, it is achieved the protection of cavity top board, thus control to make the form of chamber cavity.

Owing to salt cavern underground storage often build about 1000 meters, underground in, make chamber long construction period, wellhole annular space of constructing Space is little, and supervising device need to place 2-3 in wellhole, and oil-water interfaces fluctuation range reaches the practical situations such as tens of rice, The oil-water interfaces measuring method used in above-ground storage tank, as float-ball type, differential pressure type, short-wave absorption formula, radio frequency are led Formula etc. of receiving does not adapts to molten chamber working environment.It addition, during the molten chamber in salt cave, along with entering of molten chamber process OK, environment changes, and as in salt, the concentration of salt incrementally increases, salinity can become big, and dielectric constant can become Little.

Summary of the invention

In order to overcome the deficiencies in the prior art, this utility model provides a kind of bank molten chamber, salt cave on-line monitoring device, Which solve full-automatic process, on-line checking, real-time Transmission and automatic scale etc. during the molten chamber of bank to ask Topic, it is achieved accurately measuring and monitoring in real time of cavity ceiling height, thus control the top profile of cavity.

This utility model be the technical scheme is that

A kind of online monitoring system towards the molten chamber of bank, salt cave, including surface units and downhole unit, ground is single Unit is connected by cable reel, assembly pulley and 7 core cables with downhole unit, 1# and 4# in described 7 core cables Cable core is responsible for power supply, the measurement that 2# and 5# cable core is responsible for transmitting the order that issues of surface units and downhole unit is uploaded Data, remaining cable core is vacant, cable sheath ground connection；Described downhole unit includes:

Downhole controller, the order issued for Decoding Analysis surface units also controls each mould in downhole unit with this Block works, simultaneously the analyzing and processing molten intracavity status information that collects of downhole unit performing the encoding operation；

Mode conversion module, for the self-inspection according to control command conversion downhole unit or two kinds of mode of operations of measurement；

Measure and conversion module, be used for measuring capacitance and capacitance being converted into frequency；

Sensor group, including a pressure transducer, a temperature sensor and a tri-electrode capacitance sensor； Pressure transducer, temperature sensor all electrically connect with downhole controller, for monitoring the pressure and temperature of molten intracavity； Tri-electrode capacitance sensor passes sequentially through mode conversion module, measurement and conversion module and electrically connects with downhole controller, For monitoring oil-water interfaces height；

Down-hole graceful code modulate circuit, electrically connects with downhole controller, by transformator, differential amplifier, hysteresis ratio Relatively device and mu balanced circuit composition, the down-hole status information after unit earthward sends downhole controller coding, And up-delivering signal is nursed one's health, make signal be beneficial on cable and transmit, overcome the cable capacitive reactance impact on signal.

As preferably, described tri-electrode capacitance sensor is probe sensor, and its three capacitor plates are set to Two length one are short, by the capacitance diversity judgement oil-water interfaces height between three pole plates.

As preferably, described downhole unit also includes two groups of apparatus for eliminating sludge, one group of correspondence tri-electrode capacitance sensor Two long pole plates, the short pole plate of another set correspondence tri-electrode capacitance sensor, described apparatus for eliminating sludge include step Enter push rod that motor is connected with stepping motor rotating shaft and the scale removal being arranged on tri-electrode capacitance sensor pole plate is scraped Sheet, described motor electrically connects with downhole controller, processor control motor work, pass through push rod Drive scale removal scraping blade that pole plate is carried out scaling operation.

As preferably, described surface units includes:

Ground controller, the ceiling height uploaded for Decoding Analysis downhole unit, temperature, pressure information are concurrent Give remote computer, receive remote computer and instruct and encode；Control each module of surface units complete simultaneously Become corresponding function；

Ground graceful code modulate circuit, electrically connects with ground controller, by transformator, differential amplifier, hysteresis ratio Relatively device and mu balanced circuit composition, the control command issued after sending ground controller coding to downhole unit, And signal is nursed one's health, make signal be beneficial on cable and transmit, overcome the impact of cable capacitive reactance；

Depth measuring module, electrically connects with ground controller, for phase judgment and the degree of depth of degree of depth pulse signal The counting of pulse, ground controller calculates the ID value of downhole instrument after reading counted number of pulses；

Wireless communication module, electrically connects with ground controller, is used for realizing surface units and remote control service device Information mutual；

Display module, electrically connects with ground controller, for display command, the ID of downhole instrument, chamber The information such as the position measuring height, temperature, pressure and push rod at body top board interface, can also be conveniently simultaneously The debugging of system；

Alarm module, electrically connects with ground controller, including audible alarm and light warning, is used for reminding cavity The upper limit of top board interface level measurement or lower limit.

As preferably, described alarm module includes audible alarm and the light warning of 2 kinds of colors of 2 kinds of frequencies, high The sound of frequency and red light represent that cavity top board interface has exceeded the upper limit measured, low-frequency sound and Huang Colored lights represents that cavity top board interface has exceeded the lower limit measured.

As preferably, described ground controller and downhole controller select G3CX type FPGA of Cyclone V series Chip, uses embedded Nios II soft processor.

The beneficial effects of the utility model are:

This utility model is the most full-automatic to work such as the top board interface during on-the-spot molten chamber, cavity morphometries Change mode instead of, and saves substantial amounts of cost of labor to the work of molten chamber；Device uses ultra-large able to programme patrol Collect device and embedded soft core microprocessor, make downhole instrument highly integrated, use probe sensor simultaneously, Overcome the bottleneck of narrow space, solve the problem placing measurement apparatus at The Small Well orifice ring in the air, at very great Cheng The development of molten chamber technique is advanced on degree；Device uses the mode of data encoding, makes downhole instrument and ground instrument Achieve reliable long-distance transmissions, fundamentally solve ground and monitor the state in the molten chamber of underground salt cave in real time, Achieve real time and on line monitoring；Device, by setting the probe of one group of Length discrepancy, utilizes between capacitor plate fixing Reference length, dynamically detect the dielectric constant of salt residing for probe, it is achieved that molten chamber monitoring during to electricity Hold the automatic scale of sensor, eliminate traditional capacitance determining method because salinity change causes dielectric constant The change impact on measurement result, efficiently solves the erroneous judgement problem of cavity top board form；Device is provided with certainly Inspection and 2 kinds of mode of operations of measurement, by self-inspection mode of operation, can be to the duty of package unit on ground It is monitored, improves the reliability of device；Device is provided with scale removal scraping blade, refers to according to the scale removal that ground issues Order, can carry out automatic desludging to probe under the control of motor, eliminates probe and is in salt raw dirt for a long time Hidden danger, it is ensured that the sensitivity that probe is long-term；By arranging, device when measuring mode of operation, the essence such as employing Degree measuring frequency principle, solves the problem that in tradition Measuring Frequency Method, measurement error is relevant with measured signal frequency；Device is adopted Being connected with host computer by the method for wireless communication and serial data communication, the data making device in-site measurement are real Shi Chuanzhi background server, meets the demand of digital oil field development to a great extent.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model embodiment.

The surface units design principle block diagram that Fig. 2 provides for this utility model embodiment.

Fig. 3 is the downhole unit design principle block diagram that this utility model embodiment provides.

Shown in figure: 1. surface units, 2. downhole unit, 3. cable reel, 4. assembly pulley, 11. ground Controller, 12. ground graceful code modulate circuits, 13. depth measuring module, 14. wireless communication modules, 15. show Showing module, 16. alarm modules, 21. downhole controllers, 22. mode conversion module, 23. measure and conversion Module, 24. sensor groups, 25. down-hole graceful code modulate circuits, 26. apparatus for eliminating sludge, 241. pressure sensings Device, 242. temperature sensors, 243. tri-electrode capacitance sensors

Detailed description of the invention

With embodiment, this utility model is further illustrated below in conjunction with the accompanying drawings.

Understandable in order to enable above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with attached The detailed description of the invention of the present invention is described in detail by figure.

Seeing Fig. 1, this figure is a kind of on-line monitoring system towards the molten chamber of bank, salt cave that the embodiment of the present invention provides System, including surface units 1 and downhole unit 2, surface units 1 and downhole unit 2 are by cable reel 3, pulley Group 4 and 7 core cables connect, and in described 7 core cables, 1# and 4# cable core is responsible for power supply, 2# and 5# cable core is responsible for Transmitting the order that issues of surface units 1 and measurement data that downhole unit 2 is uploaded, remaining cable core is vacant, outside cable Bark graft ground；The instruction that ground issues mainly has self-checking command, measurement instruction and scale removal instruction, the number that down-hole is uploaded According to information such as the positions specifically including that ceiling height, pressure, temperature and scale removal scraping blade.

Ground instrument is to downhole instrument transmitting order to lower levels frame format:

0X5555

Command control word

0XAAAA

Command frame format illustrates: 0X5555 represents that command header, 0XAAAA represent that order tail, middle order control Word table shows the specific instructions that ground instrument sends to downhole instrument, and command control word is that 0X0701 represents downhole instrument Doing self-test operations, command control word is that 0X0702 represents that downhole instrument does measurement operation, and command control word is 0X0703 represents that downhole instrument does scale removal and starts operation, and scale removal scraping blade moves down, and command control word is 0X0704 Representing that downhole instrument does scale removal and returns operation, scale removal scraping blade moves up.

Downhole instrument transmits data frame format earthward:

0X0707

Temperature value

Force value

Ceiling height

Long push rod position

Short push rod position

0XF0F0

Data frame format illustrates: 0X0707 represents that data head, 0XF0F0 represent data tail, intermediate data table respectively Showing the temperature value of measurement, force value, ceiling height and long push rod position and short push rod position, temperature value is 16 Position, force value is 16, and ceiling height is the data bit of 2 32, the most corresponding count value Nx and Ns.Length pushes away Bar position is 32, and short push rod is 32, the step number of the most corresponding micro-step motor.

Surface units 1, as in figure 2 it is shown, include: ground controller 11, selects the G3CX of Cyclone V series Type fpga chip, use embedded Nios II soft processor ceiling height that Decoding Analysis downhole unit 2 is uploaded, Temperature, pressure information are also sent to remote computer, receive remote computer and instruct and encode；Same time control Surface units 1 modules processed completes corresponding function；Ground graceful code modulate circuit 12, with ground controller 11 electricity Connect, be made up of transformator, differential amplifier, hysteresis loop comparator and mu balanced circuit, for downhole unit 2 Send the control command issued after ground controller 21 coding, and signal is nursed one's health, make signal be beneficial to Transmit on cable, overcome the impact of cable capacitive reactance；Depth measuring module 13, electrically connects with ground controller 11, For phase judgment and the counting of degree of depth pulse of degree of depth pulse signal, ground controller 11 reads counted number of pulses After calculate the ID value of downhole instrument；Wireless communication module 14, electrically connects with ground controller 11, uses Mutual with the information of remote control service device in realizing surface units 1；Display module 15, with ground controller 11 Electrical connection, for display command, the ID of downhole instrument, the measurement height at cavity top board interface, temperature, The information such as the position of pressure and push rod, can also facilitate the debugging of system simultaneously；Alarm module 16, with ground Controller 11 electrically connects, including audible alarm and the light warning of 2 kinds of colors of 2 kinds of frequencies, high-frequency sound Representing that cavity top board interface has exceeded the upper limit measured with red light, low-frequency sound and yellow light represent Cavity top board interface has exceeded the lower limit measured.

Described downhole unit 2, as it is shown on figure 3, include: downhole controller 21, downhole controller is selected equally The G3CX type fpga chip of Cyclone V series, uses embedded Nios II soft processor to come Decoding Analysis ground single First 1 order issued also controls modules work in downhole unit 2, simultaneously analyzing and processing downhole unit 2 with this The molten intracavity status information that collects also performs the encoding operation；Mode conversion module 22, for according to control command The self-inspection of conversion downhole unit 2 or two kinds of mode of operations of measurement；Measure and conversion module 23, be used for measuring electric capacity Capacitance is also converted into frequency by value；Sensor group 24, passes including 241, temperature of a pressure transducer Sensor 242 and a tri-electrode capacitance sensor 243；Pressure transducer 241, temperature sensor 242 are all and down-hole Controller 21 electrically connects, for monitoring the pressure and temperature of molten intracavity；Tri-electrode capacitance sensor 243 is probe Formula sensor, it is short, by the capacitance diversity judgement between three pole plates that its three capacitor plates are set to two length one Oil-water interfaces height, tri-electrode capacitance sensor 243 passes sequentially through mode conversion module 22, measures and convert mould Block 23 electrically connects with downhole controller 21；Down-hole graceful code modulate circuit 25, electrically connects with downhole controller 21, with Ground graceful code modulate circuit is the same, is made up of transformator, differential amplifier, hysteresis loop comparator and mu balanced circuit, Down-hole status information after unit 1 earthward sends downhole controller 21 coding, and up-delivering signal is carried out Conditioning, makes signal be beneficial on cable and transmits, overcome the cable capacitive reactance impact on signal；

In addition downhole unit 2 also includes two groups of apparatus for eliminating sludge 26, the two of one group of correspondence tri-electrode capacitance sensor 243 Individual long pole plate, the short pole plate of another set correspondence tri-electrode capacitance sensor 243, described apparatus for eliminating sludge 26 includes Push rod that motor is connected with stepping motor rotating shaft and being arranged on tri-electrode capacitance sensor 243 pole plate Scale removal scraping blade, described motor electrically connects with downhole controller 21, processor control motor work, Drive scale removal scraping blade that pole plate is carried out scaling operation by push rod.

When performing self-test operations, downhole instrument one fixing electric capacity of access is to measuring circuit, through circuit transformations After capacitance is changed into frequency values, carry out frequency measurement, upload data according to data output format instrument earthward, The temperature value uploaded during Auto-Sensing Mode, force value, push rod position are all set as the value fixed, and interfacial level value is The fixed value measured, this value does not reflect the elevation information of top board.

When performing to measure operation, sensor probe accesses measuring circuit, the output signal reflection of sensor probe The height of molten chamber top board, is converted into pulse signal by probe output signal after circuit transformations, is converted into pulse The frequency of signal is corresponding to the height of molten chamber top board.The self-inspection of ceiling height and measurement share same translation circuit, According to the difference of order, downhole controller controls the break-make of relay, it is achieved self-inspection and the switching of measurement.To arteries and veins The measurement rushing signal frequency uses equal precision measurement principle, and its step is that Nios II processor exports Synchronization Control Signal, utilizes the rising edge of measured signal to go to trigger, produces synchronous counting and enable signal, and high level is effective, this Ensuring that counting enables signal and holds time is the integral multiple in measured signal cycle.Signal is enabled effective at counting Under conditions of, utilize the enumerator of 2 32 simultaneously to measured pulse counting and calibration pulse counting, set quilt Surveying counted number of pulses Nx and calibration pulse count value Ns, Nios I I processor reads count value Nx and Ns respectively. Utilize formula fx=(Nx*fs)/Ns, obtain measured signal frequency fx, thus record the elevation information of molten chamber top board. For the measurement of temperature, select thermal resistance temperature sensor, by direct-current bridge, temperature information is transformed into voltage Signal, is acquired after amplifying filtering；For the measurement of pressure, select piezoresistance sensor, pass through direct current Pressure information is transformed into voltage signal by electric bridge, is acquired after amplifying filtering.Utilize equally accurate frequency measurement side Method, drastically increases the certainty of measurement of frequency, solves tradition Measuring Frequency Method medium frequency measurement error and tested letter Number problem that frequency is relevant.Probe based on one group of Length discrepancy, utilizes ginseng fixing between long probe and short probe Examine length, dynamically detect the dielectric constant in the salt of probe place, it is achieved that to probe during the monitoring of molten chamber The automatic compensation of signal, eliminates traditional capacitance determining method because salinity change causes change in dielectric constant Impact on measurement result, efficiently solves the erroneous judgement problem of cavity top board form.

When perform scale removal start to operate time, downhole controller according to the stroke of push rod, export 2 groups control pulses to Micro-step motor, set of pulses correspondence long probe, one group of corresponding short probe, motor is rotated clockwise band Dynamic push rod moves down, and push rod moves drive scale removal scraping blade and moves down.When performing scale removal and returning operation, well Lower controller according to the stroke of push rod, export 2 groups control pulses to micro-step motor, set of pulses correspondence is long Probe, one group of correspondence section probe, motor counterclockwise rotarily drives push rod and moves up, and push rod moves drive Scale removal scraping blade moves up, and is regained by scale removal scraping blade.

The part not illustrated in description is prior art or common knowledge.The present embodiment is merely to illustrate this reality With novel, rather than limiting scope of the present utility model, those skilled in the art are done for this utility model The amendment such as equivalent replacement be all deemed to fall within this utility model right claim institute protection domain.

Claims (6)

1. the online monitoring system towards the molten chamber of bank, salt cave, including surface units (1) and downhole unit (2), surface units (1) is connected by cable reel (3), assembly pulley (4) and 7 core cables with downhole unit (2), in described 7 core cables, 1# and 4# cable core is responsible for power supply, the measurement data that 2# and 5# cable core is responsible for transmitting surface units (1) order that issues and downhole unit (2) is uploaded, remaining cable core is vacant, cable sheath ground connection；It is characterized in that: described downhole unit (2) including:

Downhole controller (21), the order that issues for Decoding Analysis surface units (1) also controls each module work in downhole unit (2) with this, analyzes and processes molten intracavity status information that downhole unit (2) collects simultaneously and performs the encoding operation；

Mode conversion module (22), for the self-inspection according to control command conversion downhole unit (2) or two kinds of mode of operations of measurement；

Measure and conversion module (23), be used for measuring capacitance and capacitance being converted into frequency；

Sensor group (24), including a pressure transducer (241), a temperature sensor (242) and a tri-electrode capacitance sensor (243)；Pressure transducer (241), temperature sensor (242) all electrically connect with downhole controller (21), for monitoring the pressure and temperature of molten intracavity；Tri-electrode capacitance sensor (243) passes sequentially through mode conversion module (22), measurement and conversion module (23) and electrically connects with downhole controller (21), is used for monitoring oil-water interfaces height；

Down-hole graceful code modulate circuit (25), electrically connect with downhole controller (21), it is made up of transformator, differential amplifier, hysteresis loop comparator and mu balanced circuit, down-hole status information after unit earthward (1) sends downhole controller (21) coding, and up-delivering signal is nursed one's health, make signal be beneficial on cable to transmit, overcome the cable capacitive reactance impact on signal.

A kind of online monitoring system towards the molten chamber of bank, salt cave, it is characterized in that: described tri-electrode capacitance sensor (243) is probe sensor, it is short, by the capacitance diversity judgement oil-water interfaces height between three pole plates that its three capacitor plates are set to two length one.

A kind of online monitoring system towards the molten chamber of bank, salt cave, it is characterized in that: described downhole unit (2) also includes two groups of apparatus for eliminating sludge (26), two long pole plates of one group of correspondence tri-electrode capacitance sensor (243), the short pole plate of another set correspondence tri-electrode capacitance sensor (243), described apparatus for eliminating sludge (26) includes motor, the push rod being connected with stepping motor rotating shaft and the scale removal scraping blade being arranged on tri-electrode capacitance sensor (243) pole plate, described motor electrically connects with downhole controller (21), motor work is controlled by processor, drive scale removal scraping blade that pole plate is carried out scaling operation by push rod.

A kind of online monitoring system towards the molten chamber of bank, salt cave, it is characterised in that: described surface units (1) including:

Ground controller (11), the ceiling height uploaded for Decoding Analysis downhole unit (2), temperature, pressure information are also sent to remote computer, receive remote computer and instruct and encode；Control surface units (1) each module simultaneously and complete corresponding function；

Ground graceful code modulate circuit (12), electrically connect with ground controller (11), it is made up of transformator, differential amplifier, hysteresis loop comparator and mu balanced circuit, the control command issued after sending from ground controller (21) coding to downhole unit (2), and signal is nursed one's health, make signal be beneficial on cable to transmit, overcome the impact of cable capacitive reactance；

Depth measuring module (13), electrically connect with ground controller (11), for phase judgment and the counting of degree of depth pulse of degree of depth pulse signal, ground controller (11) calculates the ID value of downhole instrument after reading counted number of pulses；

Wireless communication module (14), electrically connects with ground controller (11), is used for realizing surface units (1) mutual with the information of remote control service device；

Display module (15), electrically connect with ground controller (11), for display command, the ID of downhole instrument, measurement height, temperature, pressure and the positional information of push rod at cavity top board interface, the debugging of system can also be facilitated simultaneously；

Alarm module (16), electrically connects with ground controller (11), including audible alarm and light warning, for reminding the upper limit or the lower limit of cavity top board interface level measurement.

A kind of online monitoring system towards the molten chamber of bank, salt cave, it is characterized in that: described alarm module (16) includes audible alarm and the light warning of 2 kinds of colors of 2 kinds of frequencies, high-frequency sound and red light represent that cavity top board interface has exceeded the upper limit measured, and low-frequency sound and yellow light represent that cavity top board interface has exceeded the lower limit measured.

A kind of online monitoring system towards the molten chamber of bank, salt cave, it is characterized in that: described ground controller (11) and downhole controller (21) select the G3CX type fpga chip of Cyclone V series, use embedded Nios II soft processor.