CN107144625A - Gas hydrates drill core light hydrocarbon gas content parses test system and method - Google Patents

Gas hydrates drill core light hydrocarbon gas content parses test system and method Download PDF

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CN107144625A
CN107144625A CN201710491399.1A CN201710491399A CN107144625A CN 107144625 A CN107144625 A CN 107144625A CN 201710491399 A CN201710491399 A CN 201710491399A CN 107144625 A CN107144625 A CN 107144625A
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gas
air
decomposition
chamber
drill core
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CN107144625B (en
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汪双清
黄春华
沈斌
曾普胜
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STATE GEOLOGY EXPERIMENT AND TEST CENTER
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/626Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using heat to ionise a gas
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature

Abstract

The invention discloses a kind of gas hydrates drill core light hydrocarbon gas content parsing test system and method.Parsing test system includes temperature control chamber, temperature control intracavitary is provided with weight calculation part, sealed decomposition chamber is placed on weight calculation part, the air inlet of decomposition chamber, air inlet check valve is separately installed with gas outlet, gas outlet air circuit breaker, pressure gauge is also equipped with decomposition chamber, safety valve, air-source is connected by the first Quick-acting gas joint with air inlet check valve, gas outlet air circuit breaker is connected by the air inlet of the second Quick-acting gas joint and collection chamber, the gas outlet of collection chamber, air-source, hydrogen source air inlet connection corresponding to flame ionization ditector respectively, air hatch is additionally provided with collection chamber.The accurate measurement of light hydrocarbon gas content during the present invention is realized to gas hydrates reservoir drill core by way of low temperature controls decomposition of hydrate, flame ionization ditector direct measurement to parse light hydrocarbon gas volume, overcome because decomposition temperature is low, speed fast, discharge big the brought technical difficulty of gas volume and security risk, it is safe and practical.

Description

Gas hydrates drill core light hydrocarbon gas content parses test system and method
Technical field
It is the present invention relates to a kind of gas hydrates drill core light hydrocarbon gas content parsing test system and real based on the system Existing gas hydrates drill core light hydrocarbon gas content parsing method of testing, belongs to oil exploration and exploitation gas hydrates brill Core methane is parsed and assay technical field.
Background technology
Gas hydrates are commonly called as " combustible ice ", are the maximum petroleum resourceses of reserves on the earth, how effectively and safely right It is explored, development and utilization is the problem of currently needing to research and solve in a hurry.
The combustible component of gas hydrates is substantially methane, also has a small amount of other light hydrocarbon gases.Therefore, it is accurate to survey Determine the content of methane and its distribution in gas hydrates reservoir be carry out natural gas hydrate exploration, development and utilization it is strong Technical need.At present, boring and coring is carried out to gas hydrates reservoir, is to obtain reservoir by carrying out analysis test to drill core The realistic approach of methane content.
Up to now, the method for determining methane content in gas hydrates reservoir drill core mainly has two kinds:One is to pass through Raman spectrum obtains gas hydrates methane cage occupation rate in drill core, and calculating obtains hydrate index, and this is a kind of indirect There is larger error in the method for obtaining methane abundance, measurement result.Two be by determining the brill before and after gas hydrate dissociation Core weight difference calculates its air content, and this belongs to direct measuring method, this metering system is excessively rough, and error is larger, and deposits In security risk.
From the foregoing, it will be observed that being decomposed to gas hydrates being controlled property of reservoir drill core gas, directly determine what is decomposited Methane content, undoubtedly obtains the best mode of drill core methane content data, still, there is presently no available for the special of this test Industry instrument and correlation technique.
Gassiness measurement in solid-state geological sample occurs in that following several gassiness measurements at present typically using solution analyzer Instrument:Shale gas site desorption Fufen analyzer (discloses text referring to Publication No. CN104655522A Chinese invention patent application Offer), visualized gassiness tester (referring to Publication No. CN202362222U Chinese utility model patent document), contain Tolerance is measured and gas collecting device (referring to Publication No. CN103245588A Chinese invention patent document), gassiness measurement Device (referring to Publication No. CN103308634A Chinese invention patent document), etc..Although the call of these instruments is each not It is identical, but test philosophy is identical, i.e., carry out gas parsing under controlled conditions, measures the gas volume parsed, and Their device composition is similar, all including parsing two basic structural units of tank and Gas measurement component.But, these instruments are big Customized for shale gas and coal bed gas boring and coring mostly, be not particularly suited for, speed low to gas decomposition temperature it is fast, The air content for discharging bulky gas hydrates drilling core is measured.
The content of the invention
It is an object of the invention to provide a kind of gas hydrates drill core light hydrocarbon gas content parsing test system and base The light hydrocarbon gas content parsing method of testing that test system is realized is parsed in light hydrocarbon gas content, it is for gas hydrates Peculiar property, uses for reference the experience of existing shale gas drilling core gassiness weight testing method, strengthens sealing, the resistance to compression to decomposition chamber Safety guarantee, adds drill core sample weight calculation function and decomposition temperature low temperature temperature controlling function, adds and realized by gravitational equilibrium The collection chamber of gas pressure pooling feature, overcomes because gas hydrate dissociation temperature is low, speed fast, release gas volume is big The technical difficulty and security risk brought, safe and practical, detection sensitivity is high, and measurement accuracy is high, safety simple to operate, solves Natural gas hydrate exploration, development and utilization are for methane content in Accurate Determining gas hydrates reservoir and its distribution Strong technical needs of problems.
To achieve these goals, present invention employs following technical scheme:
A kind of gas hydrates drill core light hydrocarbon gas content parses test system, it is characterised in that:It includes temperature control chamber, Temperature control intracavitary places sealed decomposition chamber provided with weight calculation part on weight calculation part, pacifies respectively on the air inlet of decomposition chamber, gas outlet Equipped with air inlet check valve, gas outlet air circuit breaker, pressure gauge, safety valve are also equipped with decomposition chamber, air-source passes through first Quick-acting gas joint is connected with air inlet check valve, and gas outlet air circuit breaker is entered by the second Quick-acting gas joint and collection chamber Gas port is connected, and air inlet corresponding to flame ionization ditector connects respectively for the gas outlet of collection chamber, air-source, hydrogen source Connect, air hatch is additionally provided with collection chamber.
First air flow control valve is installed in the gas circuit between the air inlet of the air-source and the decomposition chamber; The second air stream is installed in gas circuit between air-source air inlet corresponding to the flame ionization ditector Control valve;Hydrogen is installed in gas circuit between hydrogen source air inlet corresponding to the flame ionization ditector Flow control valves;Gas between the air inlet corresponding to the flame ionization ditector of the gas outlet of the collection chamber Decomposition gas flow control valve is installed on road.
A kind of gas water realized based on described gas hydrates drill core light hydrocarbon gas content parsing test system Compound drill core light hydrocarbon gas content parses method of testing, it is characterised in that it includes step:
1) the first air flow control valve, the decomposition gas flow control valve are closed, second air is opened Flow control valve, the hydrogen flowing quantity control valve, are monitored and control to gas coming through flow in gas circuit;
2) igniting starts the flame ionization ditector, reaches steady-working state;
3) the air inlet check valve, the gas outlet air circuit breaker is allowed to be closed;
4) decomposition chamber is placed on the weight calculation part of the temperature control intracavitary, measures its empty mass;
5) decomposition chamber is opened, fastens, makes immediately after gas hydrates drill core is quickly placed into the decomposition chamber The decomposition chamber is in sealing state;
6) quality during decomposition chamber load sample is measured by the weight calculation part;
7) decomposition chamber by the second Quick-acting gas joint, the first Quick-acting gas joint respectively with the collection Air chamber, the first air flow control valve are connected;
8) low temperature control is carried out to temperature residing for the decomposition chamber by the temperature control chamber, to avoid day in the decomposition chamber The decomposition rate of right gas hydrate drill core is too fast;
9) the air inlet check valve, the gas outlet air circuit breaker are opened, and opens the first air mass flow control Valve processed and the decomposition gas flow control valve, are monitored and control to gas coming through flow in gas circuit;
10) storage that the decomposition gas produced in the decomposition chamber after the parsing of gas hydrates drill core passes through the collection chamber Detected after collection and cushioning effect into the flame ionization ditector;
11) the detection data of the flame ionization ditector are gathered, until gas hydrates drill core is decomposed completely;
12) obtained detection data are handled, calculating obtains light hydrocarbon gas in unit mass gas hydrates drill core Content.
It is an advantage of the invention that:
What the 1st, the present invention was taken the light hydrocarbon gas content of gas hydrates reservoir drill core is direct measurement mode, this Direct measurement mode the data obtained is the direct reflection of gas hydrates reservoir light hydrocarbon gas content, and authenticity is high, reliability It is high.
2nd, the present invention takes cryogenic conditions to control gas hydrate dissociation speed so that test process is safe, controllable.
3rd, the present invention carries out selective enumeration method, testing result using flame ionization ditector to light hydrocarbon gas such as methane Not by air intrusion effect, the loading of drill core sample is simple to operate, quick, effectively reduces drill core sample and occurs in loading procedure The problem of scattering and disappearing, and detection sensitivity and precision are high.
4th, the present invention to the flame ionization ditector in gas hydrates drill core decomposable process by detecting data Gathered in real time, the unit volume methane signal area value based on flame ionization ditector, you can pass through processing detection Data obtain light hydrocarbon gas content in gas hydrates drill core, and calculation is simple.On the other hand, resulting unit mass Light hydrocarbon gas burst size of the gas hydrates drill core within the unit interval changes over time data and has also reflected drill core sample The dynamic law of gas resolving, can provide guidance for the engineering design of related gas hydrates reservoir exploitation with implementing Property reference data.
5th, present invention enhances the safety precautions to decomposition chamber, there is provided built-in electronic weight calculation function and low temperature temperature control Function, devises and realizes the collection chamber that gas pressure is buffered by gravitational equilibrium, overcome because of gas hydrate dissociation temperature Low, speed is fast, discharge in big the brought technical difficulty of gas volume and security risk, and air inlet there is provided air inlet list To valve, decomposition gas is removed for introducing air remaining so that test operation is convenient, safety, test data is complete, reliable.
6th, collection chamber of the invention is designed using sealed gravity piston, both with the effect for preserving gas, is served again Alleviate the effect of decomposition gas excess pressure impact, ensured that flame ionization ditector can continuous firing with security and stability.
7th, the present invention devises air hatch, and it is not only used for calibration system, be also the composition of analysis drill core decomposition gas, Collection drill core decomposition gas sample, which is provided, easily samples approach.
Brief description of the drawings
Fig. 1 is that gas hydrates drill core light hydrocarbon gas content parsing test system of the present invention constitutes schematic diagram.
Fig. 2 is the light hydrocarbon gas decomposition rate curve map of artificial synthesized gas hydrates sample.
Fig. 3 is that the light hydrocarbon gas of artificial synthesized gas hydrates sample decompose progress curve figure.
Embodiment
Such as Fig. 1, gas hydrates drill core light hydrocarbon gas content parsing test system of the present invention includes temperature control chamber 3, temperature control Provided with weight calculation part 2 in chamber 3, sealed decomposition chamber 1 is placed on weight calculation part 2, on the air inlet of decomposition chamber 1, gas outlet respectively It is provided with air inlet check valve 8, gas outlet air circuit breaker 9, decomposition chamber 1 and is also equipped with pressure gauge 6, safety valve 7, air-source leads to Cross the first Quick-acting gas joint 11 to be connected with air inlet check valve 8, gas outlet air circuit breaker 9 passes through the second Quick-acting gas joint 10 Be connected with the air inlet of collection chamber 4, the gas outlet of collection chamber 4, air-source, hydrogen source respectively with flame ionization ditector 5 The connection of corresponding air inlet, be additionally provided with air hatch 16 on collection chamber 4.
In the present invention, gas hydrates drill core carries out gas parsing in decomposition chamber 1, and its controlled temperature temperature chamber 3 is controlled System.Decomposition chamber 1 has resistance to compression, Seal Design.Weight calculation part 2 is used to measure gas hydrates drill core quality.Collection chamber 4 is played The effect of its excess pressure is preserved and buffered to decomposition gas, thus ensure flame ionization ditector 5 continue safety, Stably work, while providing implementation condition for the gaseous sample that collection drill core is decomposed.Flame ionization ditector 5 be used for pair Decomposition gas examinations.
Such as Fig. 1, in actual design, first is provided with the gas circuit between the air inlet of air-source and decomposition chamber 1 empty Is provided with flow control valves 12, the gas circuit between air-source air inlet corresponding to flame ionization ditector 5 Installed in two air flow control valves 13, the gas circuit between hydrogen source air inlet corresponding to flame ionization ditector 5 There is hydrogen flowing quantity control valve 14, the gas between the air inlet corresponding to flame ionization ditector 5 of the gas outlet of collection chamber 4 Decomposition gas flow control valve 15 is installed on road.
Such as Fig. 1, collection chamber 4 includes the air collecting chamber 42 of open top, and the open-mouth of air collecting chamber 42 is hermetically movably installed with Gravity type piston 41, gravity type piston 41 can move up and down with the change of circulated gases amount in air collecting chamber 42, to buffer decomposition The excess pressure that decomposition gas is produced in room 1.
In actual design, decomposition chamber 1 is that can quickly open the sealed decomposition chamber with fastening, and such structure design is just In the loading of Rapid Implementation drill core sample, effectively reduce gas hydrates gas and scatter and disappear.
In addition, the air inlet check valve 8 of decomposition chamber 1, the function of gas outlet air circuit breaker 9 are can to prevent hydrate point Gas leakage is solved, cleaning of the foreign gas realization to gas hydrate dissociation residual air can be introduced again.
In the present invention, temperature control chamber 3, weight calculation part 2, pressure gauge 6, air inlet check valve 8, gas outlet air circuit breaker 9, hydrogen Flame ionization detector 5, the first air flow control valve 12, the second air flow control valve 13, hydrogen flowing quantity control valve 14, The grade of decomposition gas flow control valve 15 is connected with control processor, and control processor is used to send control instruction, receives detection number According to this and carry out Correlation method for data processing etc..
Test system is parsed based on the invention described above gas hydrates drill core light hydrocarbon gas content, the invention also provides A kind of gas hydrates drill core light hydrocarbon gas content parses method of testing, and it includes step:
1) the first air flow control valve 12, decomposition gas flow control valve 15 are closed, the second air flow control is opened Valve 13, hydrogen flowing quantity control valve 14, are monitored and control to gas flow in gas circuit;
2) igniting starts flame ionization ditector 5, reaches steady-working state;
3) air inlet check valve 8, gas outlet air circuit breaker 9 is allowed to be closed;
4) decomposition chamber 1 is placed on the weight calculation part 2 in temperature control chamber 3, measures its empty mass;
5) decomposition chamber 1 is opened, is fastened immediately after gas hydrates drill core is quickly placed into decomposition chamber 1, makes decomposition chamber 1 In sealing state;
6) quality when measuring 1 load sample of decomposition chamber by counting weight part 2;
7) decomposition chamber 1 by the second Quick-acting gas joint 10, the first Quick-acting gas joint 11 respectively with collection chamber 4, first Air flow control valve 12 is connected;
8) low temperature control is carried out to temperature residing for decomposition chamber 1 by temperature control chamber 3, to avoid natural gas in decomposition chamber 1 from being hydrated The decomposition rate of thing drill core is too fast;
9) air inlet check valve 8, gas outlet air circuit breaker 9 are opened, and opens the first air flow control valve 12, decompose Gas flow control valve 15, is monitored and controls to gas flow in gas circuit;
10) decomposition gas produced in decomposition chamber 1 after the parsing of gas hydrates drill core is gentle by preserving for collection chamber 4 Detected after punching effect into flame ionization ditector 5;
11) the detection data of flame ionization ditector 5 are gathered, until gas hydrates drill core is decomposed completely;
12) obtained detection data are handled, calculating obtains light hydrocarbon gas in unit mass gas hydrates drill core Content.
In actually implementing, the temperature of temperature control chamber 3 is controlled between 1 DEG C to 15 DEG C, and the first air flow control valve 12 is controlled The upper limit of air velocity processed is in 10mL/min between 12mL/min, and the second air flow control valve 13 control air velocity exists 360mL/min between 365mL/min, hydrogen flowing quantity control valve 14 control hydrogen flow rate 38mL/min to 40mL/min it Between, the upper limit for the decomposition gas flow velocity that the control collection chamber 4 of decomposition gas flow control valve 15 is sent out is within 25mL/min, hydrogen fire The operating temperature of flame ionization detector 5 is controlled between 190 DEG C to 250 DEG C.
During step 8~11) is performed, from the collection gas hydrates drill core point of air hatch 16 on collection chamber 4 Gaseous sample is solved, to carry out gas chromatographic analysis or for preserving.
In actually implementing, step 12) further comprise:
Based on passing through Standard Gas of Methane flame ionization ditector unit volume methane signal area obtained by calibrating The time integral value of signal (detection), to the gas hydrate dissociation product that is collected by flame ionization ditector 5 Detection data are integrated processing, and by count weight the acquisition of part 2 gas hydrates drill core quality (drill core quality=point Solve quality-decomposition chamber empty mass during the load sample of room), calculate and draw out light hydrocarbon gas decomposition rate curve (unit interval, list Light hydrocarbon gas volume (mL/kg/min) and resolving time point (min) in the gas hydrates drill core decomposition gas of position quality Relation curve, such as Fig. 2), and light hydrocarbon gas decompose progress curve (unit mass gas hydrates drill core accumulation decompose Light hydrocarbon gas volume (mL/kg) and the relation curve of accumulative resolving time (min), such as Fig. 3) so that, decompose in progress curve most The value at moment is the light hydrocarbon gas content in unit mass gas hydrates drill core afterwards.
Further, based on the light hydrocarbon gas content in the unit mass gas hydrates drill core calculated, with reference to from taking The collection sample of gas port 16 carries out the gas composition data that gas chromatographic analysis is obtained, and calculates unit mass gas hydrates brill The content of each component such as methane in the decomposition gas of core.
In practice, step 1 is being performed) it is preceding also including system calibrating step, specifically include:
1) decomposition chamber 1 is fastened, decomposition chamber 1 is placed in temperature control chamber 3;
2) decomposition chamber 1 is connected with collection chamber 4, air-source;
3) the first air flow control valve 12, the second air flow control valve 13, hydrogen flowing quantity control valve 14, air inlet are opened Mouth check valve 8, gas outlet air circuit breaker 9 and decomposition gas flow control valve 15, are monitored and control to gas flow in gas circuit System, wherein, the air velocity for generally controlling the first air flow control valve 12 is 10mL/min, and controls the second air mass flow control The operating temperature of the flow velocity and flame ionization ditector 5 of valve 13 processed and hydrogen flowing quantity control valve 14 come ensure hydrogen flame from The steady operation of sonization detector 5;
4) igniting starts flame ionization ditector 5, reaches steady-working state;
5) after system is stable, the Standard Gas of Methane accurately measured is injected from air hatch 16, is examined by hydrogen flameionization The detection of device 5 and acquisition testing data are surveyed, until whole methane are detected;
6) processing detection data, by asking for the integrated value of CH_4 detection signal intensity and detection time, calculate and are being The unit volume methane signal area (time integral value of detection signal) of flame ionization ditector 5, is completed under system environment System calibrating.
Embodiment:
(1) sample:Artificial synthesized gas hydrates sample.
(2) instrument condition of work:3 DEG C of the temperature of temperature control chamber 3, the current limliting 10mL/min of the first air flow control valve 12, point Solve gas flow control valve 15 current limliting 20mL/min, the flow velocity 360mL/min of the second air flow control valve 13, hydrogen flowing quantity control The flow velocity 38mL/min of valve 14,250 DEG C of the operating temperature of flame ionization ditector 5.
(3) system calibrating:The methane volumetric fraction for taking 5mL, 25mL, 45mL, 65mL, 85mL, 120mL respectively is 37.92% nitrogen methylmethane calibrating gas, injects collection chamber 4 from air hatch 16, is examined with flame ionization ditector 5 Survey, by data processing unit of account volume methane signal area, complete to system calibrating.
(4) sample test:
1) instrument gas circuit is connected, instrument condition is set;
2) the first air flow control valve 12, decomposition gas flow control valve 15 are closed, the second air flow control is opened Valve 13, hydrogen flowing quantity control valve 14;
3) igniting starts flame ionization ditector 5, reaches steady-working state;
4) air inlet check valve 8, gas outlet air circuit breaker 9 are closed;
5) empty mass of decomposition chamber 1 is measured on weight calculation part 2;
6) decomposition chamber 1 is opened, artificial synthesized gas hydrates sample is taken out from nitrogen storage tank, decomposition is immediately placed in Fastened immediately behind room 1;
7) decomposition chamber 1 after load sample is placed on the weight calculation part 2 in temperature control chamber 3, measures its quality;
8) decomposition chamber 1 is connected with collection chamber 4, the first air flow control valve 12 respectively;
9) air inlet check valve 8, gas outlet air circuit breaker 9, the first air flow control valve 12 and decomposition gas stream are opened Control valve 15;
10) flame ionization ditector 5 is detected to decomposition gas, gathers the inspection of flame ionization ditector 5 Data are surveyed, until detection signal returns baseline;
11) processing detection data, draw out light hydrocarbon gas decomposition rate curve and light hydrocarbon gas decompose progress curve.
(5) test result:
It can be observed from fig. 2 that the light hydrocarbon gas decomposition rate in artificial synthesized gas hydrates sample is in the incipient stage Constantly rise, peak value 21.953mL/kg/min is reached in 22min, subsequent decomposition rate is constantly reduced, in 47min 9.841mL/kg/min is dropped to, is then fluctuated between 7.9mL/kg/min~11.9mL/kg/min, finally in 341min, Light hydrocarbon gas decomposition rate suddenly drops to 1.136mL/kg/min, and gas release is finished.
From figure 3, it can be seen that the methane volumetric of the artificial synthesized gas hydrates sample cumulative release of unit mass is 3477.7mL/kg, this is its light hydrocarbon gas content.
The technical principle described above for being present pre-ferred embodiments and its being used, comes for those skilled in the art Say, without departing from the spirit and scope of the present invention, any equivalent transformation based on the basis of technical solution of the present invention, Simple replacement etc. is obvious to be changed, and is belonged within the scope of the present invention.

Claims (10)

1. a kind of gas hydrates drill core light hydrocarbon gas content parses test system, it is characterised in that:It includes temperature control chamber, control Warm intracavitary places sealed decomposition chamber provided with weight calculation part on weight calculation part, is respectively mounted on the air inlet of decomposition chamber, gas outlet Have and be also equipped with pressure gauge, safety valve on air inlet check valve, gas outlet air circuit breaker, decomposition chamber, air-source is fast by first Fast gas path joint is connected with air inlet check valve, the air inlet that gas outlet air circuit breaker passes through the second Quick-acting gas joint and collection chamber Mouth connection, the gas outlet of collection chamber, air-source, hydrogen source air inlet connection corresponding to flame ionization ditector respectively, Air hatch is additionally provided with collection chamber.
2. gas hydrates drill core light hydrocarbon gas content as claimed in claim 1 parses test system, it is characterised in that:
First air flow control valve is installed in the gas circuit between the air inlet of the air-source and the decomposition chamber;
Second is provided with gas circuit between air-source air inlet corresponding to the flame ionization ditector empty Flow control valves;
Hydrogen stream is installed in gas circuit between hydrogen source air inlet corresponding to the flame ionization ditector Control valve;
Installed in gas circuit between the air inlet corresponding to the flame ionization ditector of the gas outlet of the collection chamber There is decomposition gas flow control valve.
3. gas hydrates drill core light hydrocarbon gas content as claimed in claim 1 or 2 parses test system, its feature exists In:
The collection chamber includes the air collecting chamber of open top, and the open-mouth of air collecting chamber is hermetically movably installed with gravity type piston, Gravity type piston moves up and down with the change of circulated gases amount in air collecting chamber to be produced to buffer decomposition gas in the decomposition chamber Pressure.
4. gas hydrates drill core light hydrocarbon gas content as claimed in claim 1 or 2 parses test system, its feature exists In:
The decomposition chamber is that can quickly open the sealed decomposition chamber with fastening.
5. a kind of gas hydrates drill core light hydrocarbon gas content based on any one of claim 2 to 4 parses test The gas hydrates drill core light hydrocarbon gas content parsing method of testing that system is realized, it is characterised in that it includes step:
1) the first air flow control valve, the decomposition gas flow control valve are closed, second air mass flow is opened Control valve, the hydrogen flowing quantity control valve, are monitored and control to gas coming through flow in gas circuit;
2) igniting starts the flame ionization ditector, reaches steady-working state;
3) the air inlet check valve, the gas outlet air circuit breaker is allowed to be closed;
4) decomposition chamber is placed on the weight calculation part of the temperature control intracavitary, measures its empty mass;
5) decomposition chamber is opened, is fastened immediately after gas hydrates drill core is quickly placed into the decomposition chamber, is made described Decomposition chamber is in sealing state;
6) quality during decomposition chamber load sample is measured by the weight calculation part;
7) decomposition chamber by the second Quick-acting gas joint, the first Quick-acting gas joint respectively with the gas collection Room, the first air flow control valve are connected;
8) low temperature control is carried out to temperature residing for the decomposition chamber by the temperature control chamber, to avoid natural gas in the decomposition chamber The decomposition rate of hydrate drill core is too fast;
9) the air inlet check valve, the gas outlet air circuit breaker are opened, and opens the first air flow control valve With the decomposition gas flow control valve, gas coming through flow in gas circuit is monitored and controlled;
10) in the decomposition chamber after the parsing of gas hydrates drill core the decomposition gas that produces by the collection chamber preserve and Detected after cushioning effect into the flame ionization ditector;
11) the detection data of the flame ionization ditector are gathered, until gas hydrates drill core is decomposed completely;
12) obtained detection data are handled, the content for obtaining light hydrocarbon gas in unit mass gas hydrates drill core is calculated.
6. gas hydrates drill core light hydrocarbon gas content as claimed in claim 5 parses method of testing, it is characterised in that:
The temperature of the temperature control chamber is between 1 DEG C to 15 DEG C;
The upper limit of the first air flow control valve control air velocity is in 10mL/min between 12mL/min;
The second air flow control valve controls air velocity in 360mL/min between 365mL/min;
The hydrogen flowing quantity control valve controls hydrogen flow rate in 38mL/min between 40mL/min;
The decomposition gas flow control valve control the upper limit of the decomposition gas flow velocity that the collection chamber sends out 25mL/min with It is interior;
The operating temperature of the flame ionization ditector is controlled between 190 DEG C to 250 DEG C.
7. gas hydrates drill core light hydrocarbon gas content as claimed in claim 5 parses method of testing, it is characterised in that:
The step 12) further comprise:
The calibration value of unit volume methane signal area based on the flame ionization ditector, to the hydrogen flame ion The detection data for changing the gas hydrates drill core catabolite that detector is collected are integrated processing, and calculate natural gas Light hydrocarbon gas volume in hydrate drill core catabolite;With reference to the weight calculation part to gas hydrates in the decomposition chamber The weighing data of drill core quality, calculates the light hydrocarbon gas content in unit mass gas hydrates drill core.
8. gas hydrates drill core light hydrocarbon gas content as claimed in claim 7 parses method of testing, it is characterised in that:
Based on the light hydrocarbon gas content in the unit mass gas hydrates drill core calculated, and by from the gas collection The sample that the air hatch on room is gathered carries out the gas composition data that gas chromatographic analysis is obtained, and calculates unit mass The content of decomposition gas each component in gas hydrates drill core.
9. gas hydrates drill core light hydrocarbon gas content as claimed in claim 5 parses method of testing, it is characterised in that:
During the step 8~11) is performed, bored from the air hatch collection gas hydrates on the collection chamber Core decomposition gas sample, to carry out gas chromatographic analysis or for preserving.
10. the gas hydrates drill core light hydrocarbon gas content parsing method of testing as any one of claim 5 to 9, It is characterized in that:
Also include system calibrating step, specifically include:
1) decomposition chamber is fastened, the decomposition chamber is placed in the temperature control chamber;
2) decomposition chamber is connected with the collection chamber, the air-source;
3) the first air flow control valve, the second air flow control valve, the hydrogen flowing quantity control valve, institute are opened Air inlet check valve, the gas outlet air circuit breaker and the decomposition gas flow control valve are stated, gas flow in gas circuit is entered Row monitoring and control;
4) igniting starts the flame ionization ditector, reaches steady-working state;
5) after system is stable, the Standard Gas of Methane accurately measured is injected from the air hatch, by the hydrogen flameionization Detector detection and acquisition testing data, until whole methane are detected;
6) processing detection data, calculate the unit volume methane signal area of the flame ionization ditector, complete system System demarcation.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108318100A (en) * 2018-01-25 2018-07-24 广州海洋地质调查局 Measure the system and method that liquid nitrogen frozen hydrate sample decomposes release gas volume
CN108426801A (en) * 2018-04-23 2018-08-21 西南石油大学 A kind of method of the easy precipitate content of low temperature in measurement natural gas
CN109030767A (en) * 2018-07-17 2018-12-18 佛山奎丰商务咨询服务有限公司 A kind of new energy detection technique means of defence

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202362222U (en) * 2011-11-21 2012-08-01 张金川 Whole-course visualized gas content tester
CN103245588A (en) * 2013-05-17 2013-08-14 国家地质实验测试中心 Gas content measurement and gas collection device
CN203319964U (en) * 2013-06-07 2013-12-04 新地能源工程技术有限公司 Device for removing water and heavy hydrocarbon out of shale gas
CN204330517U (en) * 2015-01-09 2015-05-13 郭梅 Under High Temperature High Pressure, the test of shale gas air content gathers and measuring apparatus
CN104655522A (en) * 2015-02-02 2015-05-27 王思波 On-site shale gas desorption analyzer
CN105259080A (en) * 2015-11-12 2016-01-20 西南石油大学 Shale gas reservoir gas diffusion coefficient experiment test method
JP2016011842A (en) * 2014-06-27 2016-01-21 株式会社住化分析センター Temperature-programmed desorption analyzer, sample table used for the same, and temperature-programmed desorption analytic method
CN205809058U (en) * 2016-05-31 2016-12-14 中石化石油工程技术服务有限公司 Shale gas gassiness testing stand
CN206892029U (en) * 2017-06-23 2018-01-16 国家地质实验测试中心 Gas hydrates drill core light hydrocarbon gas content parses test system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202362222U (en) * 2011-11-21 2012-08-01 张金川 Whole-course visualized gas content tester
CN103245588A (en) * 2013-05-17 2013-08-14 国家地质实验测试中心 Gas content measurement and gas collection device
CN203319964U (en) * 2013-06-07 2013-12-04 新地能源工程技术有限公司 Device for removing water and heavy hydrocarbon out of shale gas
JP2016011842A (en) * 2014-06-27 2016-01-21 株式会社住化分析センター Temperature-programmed desorption analyzer, sample table used for the same, and temperature-programmed desorption analytic method
CN204330517U (en) * 2015-01-09 2015-05-13 郭梅 Under High Temperature High Pressure, the test of shale gas air content gathers and measuring apparatus
CN104655522A (en) * 2015-02-02 2015-05-27 王思波 On-site shale gas desorption analyzer
CN105259080A (en) * 2015-11-12 2016-01-20 西南石油大学 Shale gas reservoir gas diffusion coefficient experiment test method
CN205809058U (en) * 2016-05-31 2016-12-14 中石化石油工程技术服务有限公司 Shale gas gassiness testing stand
CN206892029U (en) * 2017-06-23 2018-01-16 国家地质实验测试中心 Gas hydrates drill core light hydrocarbon gas content parses test system

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
HESAM NAJIBI 等: "Methane/natural gas storage and delivered capacity for activated carbons in dry and wet conditions", 《FUEL》 *
PANAGIOTIS KASTANIDIS 等: "Devlopment of a novel experimental apparatus for hydrate equilibrium measurements", 《FLUID PHASE EQUILIBRIA》 *
国家能源局: "《SY/T 6940-2013 页岩含气量测定方法》", 1 April 2014 *
汪双清 等: "页岩气解析测试中的几个问题——以柴达木盆地柴页1井为例", 《地质通报》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108318100A (en) * 2018-01-25 2018-07-24 广州海洋地质调查局 Measure the system and method that liquid nitrogen frozen hydrate sample decomposes release gas volume
CN108318100B (en) * 2018-01-25 2023-10-10 广州海洋地质调查局 System and method for measuring volume of gas released by decomposing liquid nitrogen frozen hydrate sample
CN108426801A (en) * 2018-04-23 2018-08-21 西南石油大学 A kind of method of the easy precipitate content of low temperature in measurement natural gas
CN109030767A (en) * 2018-07-17 2018-12-18 佛山奎丰商务咨询服务有限公司 A kind of new energy detection technique means of defence

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