CN109307542A - A kind of site desorption measuring device and its method - Google Patents
A kind of site desorption measuring device and its method Download PDFInfo
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- CN109307542A CN109307542A CN201710622352.4A CN201710622352A CN109307542A CN 109307542 A CN109307542 A CN 109307542A CN 201710622352 A CN201710622352 A CN 201710622352A CN 109307542 A CN109307542 A CN 109307542A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
- G01F22/02—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for involving measurement of pressure
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Abstract
The present invention relates to a kind of site desorption measuring device, the one or more gauge lines being connect including cup, with cup；Each gauge line top respectively connects a solution cucurbitula；Sink is arranged in cup lower part, and liquid level infratubal port passes through in cup bottom insertion sink, and the upper port of liquid level tube is higher than the bottom of cup；When the water in cup is higher by liquid level tube upper port, then the water in cup flows into sink by liquid level tube upper port；When the water in cup is lower than liquid level tube upper port, then the water in sink is pumped into cup by water pump, to keep the water level height in cup constant.The present invention realizes automation on the basis of using conventional discharge gas collection method measurement volume, through the method for pressure measurement, can be completed at the same time multiple sample analysis, and can adapt to different sample types, lighter and efficient for relatively existing technology.
Description
Technical field
The invention belongs to unconventional oil and gas exploration engineering fields, and in particular to a kind of site desorption using draining water gathering of gas law
Measuring device and its method.
Background technique
Shale gas refers to preservation in the Unconventional gas preserved in series of rocks based on rich organic shale.
Instrument currently used for shale gas site desorption measurement has two classes: one kind is to be calculated as metering method with mass flow
Shale gas site desorption amount analyzer, automatic gauge may be implemented in this quasi-instrument, but due to mass flowmenter metered body
Requirement gas composition is single when product or composition is constant, measures different gas, need to can just obtain gas by conversion and flow through flow
The true volume of meter, and when containing vapor in gas, larger deviation will occur for measured value, for the scene of shale
Stripping gas measurement, component can also change with the passage of desorption time, and rock core goes out cylinder inevitably will be containing certain
Moisture, this also directly affects measurement result.
Second class method is measured using traditional draining water gathering of gas law, and when reading needs manually to move the container being filled with water
To reflex glass pipe, read after with the naked eye carrying out water level alignment.After a tin rock core comes out, 3-4 sample is generally taken
More than, due to most short needs one number of reading in every 2 minutes of the metering cycle of site desorption amount, night someone must also read at any time
Number, so workload is very big, and is not able to achieve automation, while after glass tube gassy, then it can not handover measurement.
From the foregoing, it will be observed that there are two big disadvantages for the prior art: robot can not directly carry out volume metering；Artificial drainage collection
What gas method was directly measured is volume, but is not able to achieve automation, heavy workload.
Therefore, it is necessary to a kind of shale gas site desorption measuring devices, can be realized automatic gauge volume and adapt to
The rock sample that desorption quantity differs in size, convenient for acquisition gas sample.
Summary of the invention
It to solve the above-mentioned problems, can basis the present invention provides a kind of site desorption measuring device and its method
The diameter of the pressure value, glass tube that acquire in real time, desorption tank volume, the parameters such as example weight will desorb in shale desorption process
Gas out is converted into normal volume, to realize the automatic measurement of stripping gas.
A kind of site desorption measuring device is provided according to the present invention, including cup, connect with cup one or more
A gauge line；Each gauge line top respectively connects a solution cucurbitula；Sink is arranged in cup lower part, and liquid level infratubal port is from cup
Bottom is pierced by and is inserted into sink, and the upper port of liquid level tube is higher than the bottom of cup；
When the water in cup is higher by liquid level tube upper port, then the water in cup flows into sink by liquid level tube upper port；
When the water in cup is lower than liquid level tube upper port, then the water in sink is pumped into cup by water pump, to keep in cup
Water level height is constant.
In one embodiment, it solves between cucurbitula and gauge line and sets gradually normally open valve and triple valve, the third of triple valve
End connection gas injection port；Pressure sensor is equipped between normally open valve and triple valve, the pressure sensor electrically connects with control device
It connects, the top of each gauge line also respectively connects a vent valve.
In one embodiment, the control device further includes environment temperature sensor and atmosphere pressure sensor.
In one embodiment, in the cup water level height be lower than gauge line upper port.
In one embodiment, the bottom of each gauge line is respectively provided with a communicating pipe, each communicating pipe connects water jointly
Bottom of a cup portion.
In one embodiment, the glass tube of different inner diameters can be dismantled and be changed to each gauge line.
A kind of site desorption measuring method of site desorption measuring device according to is provided according to the present invention,
The following steps are included:
Step 1: under original state, opening normally open valve, close vent valve, demarcate fixed value maximum level difference hmaxAnd often
Volume V between valve opening and gauge line0；
Step 2: sample being placed in the solution cucurbitula of sealing, the gas desorbed enters gauge line and squeezes gauge line downwards
In water to being pressed into cup, the water in cup passes through in liquid level tube upper port overflow screw clamp；
Step 3: pressure sensor timing acquiring gas pressure and environment temperature sensor, atmosphere pressure sensor timing are adopted
Collect environment temperature and atmospheric pressure；
Step 4: when the gas in gauge line reaches default liquid level, pressure sensor acquires maximum gas pressure
PmaxAnd atmosphere pressure sensor acquires environmental pressure PRing；
Meanwhile control device automatically controls and closes normally open valve, opens vent valve and is exhausted, cup water reflux to gauge line
In, water in sink is pumped into cup by water pump keeps cup liquid level constant；
Step 5: when the gas pressure of pressure sensor detection gauge line reaches ambient atmosphere pressure, closing vent valve, open
Normally open valve；
Step 6: by triple valve connect gas injection port conciliate cucurbitula, from gas injection port to solution cucurbitula in injection pressure P0, volume VCalibration
Gas, then triple valve is connected into solution cucurbitula and gauge line, after stablizing, pressure sensor obtains metering overpressure PCalibration, with
And gauge line liquid level difference hCalibration；
Step 7: restPosing, start desorption cycle next time；
In one embodiment, the fixation according to step 1 and step 6 the data obtained, between calibration solution cucurbitula and normally open valve
Volume VTankValue,
P0(VTank+V0+VCalibration)=PCalibration(VTank+V0+hCalibrationS)
VTank=(P0VCalibration-PCalibrationhCalibrationS)/(PCalibration-P0)-V0
Wherein, S is the area of cross section in gauge line；
In one embodiment, according to step 1 and step 4 the data obtained, the fixation of releasing when gauge line is deflated is demarcated
The value of volume Vmax,
Vmax=[Pmax(V0+hmaxS)-PRingV0]/PMark
Wherein, PMarkFor 1 standard atmospheric pressure；S is the area of cross section in gauge line；
In one embodiment, any two moment t1 and t2, pressure are respectively P1And P2, corresponding liquid level difference is h1With
h2, cross-sectional area is S in glass tube, measurement twice be spaced in gauge line gas n times are discharged, then twice metering room every interior stripping gas
Amount is scaled standard state are as follows:
V=[P2(VTank+V0+h1S)-P1(VTank+V0+h2S)]/PMark+nVmax
Wherein, PMarkFor 1 standard atmospheric pressure；S is the area of cross section in gauge line.
Compared with the prior art, the advantages of the present invention are as follows: (1) cup can simultaneously connect at least one gauge line, make
Can simultaneously multiple samples progress desorption gas be collected and analyzed by obtaining apparatus of the present invention；(2) gauge line can be dismantled and not
It is mutually replaced between the reflex glass pipe of internal diameter, is adapted to the sample of different type and desorption quantity, therefore apparatus of the present invention
Both shale gas can be applicable in and be also suitable coal bed gas；(3) desorption gas is collected using draining water gathering of gas law, obtained data are without considering
The composition of gas, data error are small and with a high credibility；(4) it is controlled using control device, realizes automation, alleviate live survey
The workload of amount personnel.
Detailed description of the invention
The invention will be described in more detail below based on embodiments and refering to the accompanying drawings.Wherein:
Fig. 1 shows the structure chart of site desorption measuring device according to the present invention；
Identical component uses identical appended drawing reference in the accompanying drawings.The attached drawing is not drawn according to the actual ratio.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is the structure chart of site desorption measuring device of the present invention, and the present invention includes the solution cucurbitula 1 of sealing, and sample is put
Enter and carries out gas desorption in the solution cucurbitula 1 of sealing；The upper end for solving cucurbitula 1 connects a normally open valve 2, and normally open valve 2 is for controlling solution
The Push And Release that gas flows out in cucurbitula 1, normally open valve 2 can may be hand-operated valve for solenoid valve, in order to realize automation,
In preferred embodiment, using solenoid valve；Normally open valve 2 reconnects a triple valve 3, and triple valve 3 can be solenoid valve or manual
Valve, in the present embodiment, triple valve 3 is hand-operated valve；Triple valve 3 is connected to solution cucurbitula 1 and gauge line 5 in the initial state, works as needs
When measurement solves the volume V tank between cucurbitula 1 and normally open valve 2, triple valve 3 is stirred, triple valve 3 is made to be connected to gas injection port B reconciliation cucurbitula
1, it should be noted that the volume of gas is fixed value in solution cucurbitula 1, therefore solves the volume V tank between cucurbitula 1 and normally open valve 2
As fixed value.
Triple valve 3 is connected to the upper end of gauge line 5, and gauge line 5 is glass tube in the present embodiment, and glass tube is being implemented
In, it is easier to observation gas and liquid variation in intuitive gauge line 5, gauge line 5 can carry out in the present embodiment disassembly and
Replacement, when parsing to the sample with different desorption quantities, can be used the glass metrology pipe 5 of different inner diameters, to make to survey
The data of amount are more accurate and reliable；5 upper end of gauge line is also connected with a vent valve 4, and vent valve 4 is in emission measurement pipe 5
Collect the gas in the solution cucurbitula 1 come；The lower end of gauge line 5 connects the bottom of cup 6 by a communicating pipe 10, therefore when solution
After the gas desorbed in cucurbitula 1 enters gauge line 5, the liquid in gas urges gauge line 5 is entered in cup 6.
In one embodiment, the liquid in gauge line 5 is not fully full of entire gauge line 5 but there are certain bodies
Product, for cup 6 in initial setting up, the height of liquid level will be lower than the upper port of gauge line 5 in cup 6, due to cup 6 and gauge line
5 connections, therefore the liquid level in the liquid level in cup 6 and gauge line 5 is in same level, due in gauge line 5
Volume immobilize, therefore after the position of cup 6 and gauge line 5 is relatively fixed, then the volume retained in gauge line 5 is solid
Definite value, further, the volume between gauge line 5 and normally open valve 2 are fixed value, i.e. V0；Liquid level in gauge line 5 simultaneously
It also is fixed value, as the liquid level D that the liquid in the gas down gauge line 5 for solving cucurbitula 1 is set to 5 lower part of gauge line,
Therefore, the maximum height that liquid is discharged in gauge line 5 is also fixed value, i.e. hmax；And the internal diameter area S of gauge line 5 is to fix
Value, therefore the volume for the maximum liquid that can be discharged in gauge line 5 is also fixed value, i.e. Vmax=hmaxS.
A sink 7 is arranged in the lower section of cup 6, and liquid level tube 9 and water pump 8 are equipped between cup 6 and sink 7, and liquid level tube 9 is negative
Duty makes the liquid in cup 6 flow into sink 7, and water pump 8 is responsible for the water pump 8 in sink 7 entering cup 6；In one embodiment, liquid
Position pipe 9 is in a tubular form and the lower port of liquid level tube 9 passes through in 6 bottom of cup insertion screw clamp 7, and the upper port of liquid level tube 9 is higher than water
The bottom of cup 6, so that in cup 6 water can not be overflowed to by liquid level tube 9 lower than a liquid of 9 upper port of liquid level tube point
In slot 7, when the water in cup 6 is higher by 9 upper port of liquid level tube, then the water in cup 6 flows into sink by 9 upper port of liquid level tube
7；When the water in cup 6 is lower than 9 upper port of liquid level tube, then the water in sink 7 is pumped into cup 6 by water pump 8, to keep water
Water level height in cup 6 is constant, therefore during desorption, can be between more intuitive calibration gauge line 5 and cup 6
It is formed by liquid level difference.
Therefore by apparatus above, apparatus of the present invention realize the gas collection of draining water gathering of gas law, thus without considering
In the case where the composition of gas, direct metered volume, data stabilization is reliable.
In one embodiment, pressure sensor 11, the mesh of pressure sensor 11 are equipped between normally open valve 2 and triple valve 3
Be can measure the pressure for flowing through the gas at pressure sensor 11, and the pressure sensor 11 of apparatus of the present invention uses 1
The high-precision sensor of meter water column range (0.1 atmospheric pressure), precision 0.1% are measured if the volume of gauge line 5 is 500ml
Pipe 5 is about 0.1mm by the height error that pressure sensor 11 is finally read, and error is much smaller than the precision of human eye reading, therefore,
Formula is inserted in using the data of the acquisition of pressure sensor 11 and directly acquires gas desorption amount, and the data of acquisition are more stable and can
It leans on.Apparatus of the present invention need to realize that automation control, pressure sensor 11 are also electrically connected control device 12, control dress in addition
Setting 12 further includes environment temperature sensor 13 and atmosphere pressure sensor 14, therefore control device 12 can control 2 He of normally open valve
The Push And Release of vent valve 4, moreover it is possible to be responsible for collecting environment temperature and atmospheric pressure and desorption gas pressure.
In a preferred embodiment, cup 6 can be connected to at least one gauge line 5, in other words, whole
In a device, cup 6, sink 7, liquid level tube 9 and water pump 8 are a set of individual device, and the bottom of multiple gauge lines 5 leads to respectively
The bottom for respective communicating pipe 10 being commonly connected to cup 6 is crossed, and multiple gauge lines 5 at this time are single set collection systems,
I.e. each gauge line 5 has individually desorption valve, normally open valve 2, triple valve 3, vent valve 4 and a pressure sensor
11, control device 12, environment temperature sensor 13 and atmosphere pressure sensor 14.The design of this structure can be realized while to multiple
Sample is analyzed, heavy workload and efficiently.
The site desorption measuring method using site desorption measuring device, including following step will be described in detail below
It is rapid:
Step 1: under original state, normally open valve 2 is opened, closes vent valve 4, the connection of triple valve 3 solution cucurbitula 1 and gauge line 5,
Adjust the height of cup 6 and gauge line 5, demarcate maximum level difference hmax in gauge line 5 and normally open valve 2 and gauge line 5 it
Between volume V0.
Step 2: sample being placed in the solution cucurbitula 1 of sealing, the gas desorbed enters in gauge line 5 from A, and arranges downwards
It squeezes in the liquid indentation cup 6 in gauge line 5, the water in cup 6 passes through in 9 upper port overflow screw clamp 7 of liquid level tube.
Step 3: control device 12 controls 11 timing acquiring gas pressure of pressure sensor, 13 timing of environment temperature sensor
Acquire environment temperature, 14 timing acquiring atmospheric pressure of atmosphere pressure sensor.
Step 4: the liquid in the gas exclusion gauge line 5 in gauge line 5, so that the liquid in gauge line 5 reaches pre-
If when liquid level D, at this point, it is Pmax that pressure sensor 11, which acquires maximum gas pressure, atmosphere pressure sensor 14 acquires environment
Pressure is P ring.
Then, control device 12, which automatically controls, closes normally open valve 2, opens vent valve 4, makes the gas collected in gauge line 5
Be discharged in C, at this point, the liquid in cup 6 will reflux into gauge line 5, for keep cup 6 in liquid level it is constant, water pump 8
Liquid in sink 7 is pumped into cup 6.
Step 5: when the gas pressure that pressure sensor 11 detects gauge line 5 reaches ambient atmosphere pressure P0, closing and deflate
Valve 4 opens normally open valve 2.
Step 6: by triple valve 3 connect gas injection port B conciliate cucurbitula 1, from gas injection port B to solution cucurbitula 1 in injection pressure P0, body
The gas of product V calibration, then triple valve 3 is connected into solution cucurbitula 1 and gauge line 5, after stablizing, pressure sensor 11 obtains gauge line
Pressure P calibration and 5 liquid level difference h of gauge line calibration in 5.
Step 7: restPosing, start desorption cycle next time；
Step 8: gas desorption quantity is calculated according to 11 timing institute's measuring pressure of pressure sensor.
It will be explained below illustrating how calculating gas desorption quantity in step 8.
According to step 1 and step 6 the data obtained, calibration solves the value of the fixed volume V tank between cucurbitula 1 and normally open valve 2,
P0(VTank+V0+VCalibration)=PCalibration(VTank+V0+hCalibrationS)
VTank=(P0VCalibration-PCalibrationhCalibrationS)/(PCalibration-P0)-V0
Wherein, S is the area of cross section in gauge line 5；
According to step 1 and step 4 the data obtained, the value of the fixed volume Vmax of releasing when gauge line 5 is deflated is demarcated,
Vmax=[Pmax(V0+hmaxS)-PRingV0]/PMark
Wherein, PMarkFor 1 standard atmospheric pressure；S is the area of cross section in gauge line 5；
Assuming that any two moment t1 and t2, pressure is respectively P1 and P2, and corresponding liquid level difference is h1 and h2, in glass tube
Cross-sectional area is S, measurement twice be spaced in gauge line 5 gas n times are discharged, then metering room every interior gas desorption quantity is scaled mark twice
Quasi- state are as follows:
V=[P2(VTank+V0+h1S)-P1(VTank+V0+h2S)]/PMark+nVmax
Wherein, PMarkFor 1 standard atmospheric pressure；S is the area of cross section in gauge line 5；
Therefore the V that finally obtains just be twice metering room every the amount of the stripping gas of interior acquisition.
All data records are recorded in the memory card of apparatus of the present invention control device 12 according to software design format, also may be used
It is inserted into USB flash disk, data will be recorded in USB flash disk, after experiment, a whole set of data can be handled by special-purpose software, to damage
Unwise amount is restored, and loss tolerance is obtained, due to sequential loss tolerance and apparatus of the present invention content can not, do not do herein
It is specific to be described in detail.
By the above content it is found that the present invention has the advantages that (1) cup 6 can connect at least one gauge line 5 simultaneously,
Apparatus of the present invention to carry out desorption gas to multiple samples simultaneously to collect and analyze；(2) gauge line 5 can dismantle and
It is mutually replaced between the reflex glass pipe of different inner diameters, is adapted to the sample of different type and desorption quantity, therefore the present invention fills
Shale gas can be both applicable in by, which setting, is also suitable coal bed gas；(3) desorption gas is collected using draining water gathering of gas law, obtained data are without examining
Consider the composition of gas, data error is small and with a high credibility；(4) it is controlled using control device 12, realizes automation, alleviated existing
The workload of field measurement personnel.
Although by reference to preferred embodiment, invention has been described, the case where not separating the scope of the present invention
Under, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as there is no structures to rush
Prominent, items technical characteristic mentioned in the various embodiments can be combined in any way.The invention is not limited to texts
Disclosed in specific embodiment, but include all technical solutions falling within the scope of the claims.
Claims (10)
1. a kind of site desorption measuring device, which is characterized in that the one or more meterings being connect including cup, with cup
Pipe；Each gauge line top respectively connects a solution cucurbitula；Sink is arranged in cup lower part, and liquid level infratubal port is worn from cup bottom
It out and is inserted into sink, the upper port of liquid level tube is higher than the bottom of cup；
When the water in cup is higher by liquid level tube upper port, then the water in cup flows into sink by liquid level tube upper port；Work as water
When water in cup is lower than liquid level tube upper port, then the water in sink is pumped into cup by water pump, to keep the aqueous in cup
Face height is constant.
2. site desorption measuring device according to claim 1, which is characterized in that between solution cucurbitula and gauge line successively
Normally open valve and triple valve are set, and the third end of triple valve connects gas injection port；Pressure sensor is equipped between normally open valve and triple valve,
The pressure sensor and control device are electrically connected, and the top of each gauge line also respectively connects a vent valve.
3. site desorption measuring device according to claim 2, which is characterized in that the control device further includes environment
Temperature sensor and atmosphere pressure sensor.
4. site desorption measuring device according to claim 1, which is characterized in that the height of water level in the cup
Lower than the upper port of gauge line.
5. site desorption measuring device according to claim 1, which is characterized in that the bottom of each gauge line is respectively provided with
One communicating pipe, each communicating pipe connect cup bottom jointly.
6. site desorption measuring device according to claim 1-5, which is characterized in that each equal energy of gauge line
Enough dismantle and be changed to the glass tube of different inner diameters.
7. a kind of site desorption measuring method of site desorption measuring device according to claim 3, feature exist
In, comprising the following steps:
Step 1: under original state, opening normally open valve, close vent valve, demarcate fixed value maximum level difference hmax and normally open valve
Volume V between gauge line0；
Step 2: sample being placed in the solution cucurbitula of sealing, the gas desorbed enters gauge line and squeezes in gauge line downwards
To be pressed into cup, the water in cup passes through in liquid level tube upper port overflow screw clamp water；
Step 3: pressure sensor timing acquiring gas pressure and environment temperature sensor, atmosphere pressure sensor timing acquiring ring
Border temperature and atmospheric pressure；
Step 4: when the gas in gauge line reaches default liquid level, pressure sensor acquires maximum gas pressure Pmax, with
And atmosphere pressure sensor acquires environmental pressure PRing；
Meanwhile control device automatically control close normally open valve, open vent valve be exhausted, cup water reflux into gauge line,
Water in sink is pumped into cup by water pump keeps cup liquid level constant；
Step 5: when the gas pressure of pressure sensor detection gauge line reaches ambient atmosphere pressure, closing vent valve, open normally opened
Valve；
Step 6: by triple valve connect gas injection port conciliate cucurbitula, from gas injection port to solution cucurbitula in injection pressure P0, volume VCalibrationGas
Body, then triple valve is connected into solution cucurbitula and gauge line, after stablizing, pressure sensor obtains metering overpressure PCalibration, Yi Jiji
Buret liquid level difference hCalibration；
Step 7: restPosing, start desorption cycle next time.
8. site desorption measuring method according to claim 7, which is characterized in that according to step 1 and step 6 total
According to calibration solves the fixed volume V between cucurbitula and normally open valveTankValue,
P0(VTank+V0+VCalibration)=PCalibration(VTank+V0+hCalibrationS)
VTank=(P0VCalibration-PCalibrationhCalibrationS)/(PCalibration-P0)-V0
Wherein, S is the area of cross section in gauge line.
9. site desorption measuring method according to claim 8, which is characterized in that according to step 1 and step 4 total
According to the fixed volume Vm of releasing when calibration gauge line is deflatedaxValue,
Vmax=[Pmax(V0+hmaxS)-PRingV0]/PMark
Wherein, PMarkFor 1 standard atmospheric pressure；S is the area of cross section in gauge line.
10. site desorption measuring method according to claim 9, which is characterized in that any two moment t1 and t2, pressure
Power is respectively P1And P2, corresponding liquid level difference is h1And h2, cross-sectional area is S in glass tube, measurement twice be spaced in gauge line row
Gas n times out, then metering room every interior gas desorption quantity is scaled standard state twice are as follows:
V=[P2 (VTank+V0+h1S)-P1(VTank+V0+h2S)]/PMark+nVmax
Wherein, PMarkFor 1 standard atmospheric pressure；S is the area of cross section in gauge line.
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| CN201710622352.4A CN109307542B (en) | 2017-07-27 | 2017-07-27 | On-site desorption quantity measuring device and method thereof |
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| WO2024007578A1 (en) * | 2022-07-08 | 2024-01-11 | 中国石油化工股份有限公司 | Testing device and method for measuring oil, gas and water contents in rock |
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| CN109307542B (en) | 2020-09-04 |
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