CN209446419U - Gas hydrates reservoir original position property parameter simulation test macro - Google Patents
Gas hydrates reservoir original position property parameter simulation test macro Download PDFInfo
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- CN209446419U CN209446419U CN201822193277.7U CN201822193277U CN209446419U CN 209446419 U CN209446419 U CN 209446419U CN 201822193277 U CN201822193277 U CN 201822193277U CN 209446419 U CN209446419 U CN 209446419U
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Abstract
The utility model discloses a kind of gas hydrates reservoir original position property parameter simulation test macros, system includes loading the simulating chamber of filler, simulating chamber and temperature measurement unit, temperature control unit, resistivity measurement unit, permeability survey unit, acoustic measurement unit is connected with gas volume calibration room, pressure control unit and simulating chamber, gas volume demarcates room connection, gas volume calibration room is equipped with temperature sensor, pressure sensor, temperature measurement unit, temperature control unit, pressure control unit, resistivity measurement unit, permeability survey unit, the temperature sensor of acoustic measurement unit and gas volume calibration room, pressure sensor is connect with data processing and signal control unit.The utility model can be used for obtaining the incidence relation between the geophysical parameters such as gas hydrates reservoir property parameter and its sound wave, resistivity such as porosity, permeability, the hydrate concentration of gas hydrates reservoir being modeled.
Description
Technical field
The utility model relates to a kind of gas hydrates reservoir original position property parameter simulation test macros, belong to natural gas
Hydrate exploration exploits field.
Background technique
Estimate according to expert, whole world petroleum total reserve is between 270,000,000,000 tons to 650,000,000,000 tons.According to the consumption of 21 century
Speed, then have 50~60 years, global petroleum resources will be depleted.The discovery of gas hydrates allows and falls into energy danger
The mankind of machine see new hope.Gas hydrates (methane hydrate is commonly called as combustible ice) are a kind of potential geology energy,
Reserves are big, widely distributed.According to International Geological exploration tissue estimation, the reserves that methane is hydrated in earth deep-sea are enough more than 2.84
×1021m3, it is 800 times of conventional gas energy storage amount, wherein 1.135 × 10 may be contained in flammable ice sheet20m3Gas
Body.Hydration methane is once exploited, and the fuel of the mankind will be made to extend several centuries using history.But combustible ice exploitation is carried out,
The fundamental property of combustible ice reservoir must be grasped, relevant parameter is obtained.From the point of view of actually exploitation, since gas hydrates easily divide
The characteristic of solution, and its decomposition causes strong reservoir structure to change, and to obtain the technological challenge that its reservoir original position parameter is faced
Very big, there is presently no mature direct measuring technology conditions and ability.It can be seen that designing a kind of gas hydrates
Reservoir original position property parameter simulation measuring technology, the technological development direction undoubtedly having a extensive future provide gas hydrates
There is very high practical value for source evaluation and exploitation engineering technical research.
Utility model content
The purpose of this utility model is to provide a kind of gas hydrates reservoir original position property parameter simulation test macro,
The system can be used for obtaining the natural gases such as porosity, permeability, the hydrate concentration of gas hydrates reservoir being modeled
Incidence relation between the geophysical parameters such as hydrate reservoir nature parameters and its sound wave, resistivity.
To achieve the goals above, the utility model uses following technical scheme:
A kind of gas hydrates reservoir original position property parameter simulation test macro, it is characterised in that: it includes filling out
The simulating chamber of material, filler is for simulating gas hydrates reservoir；Simulating chamber and temperature measurement unit, temperature control unit, electricity
Resistance rate measuring unit, permeability survey unit, acoustic measurement unit are connected with gas volume calibration room, pressure control unit and mould
Quasi- room, gas volume calibration room connection, gas volume calibration room are equipped with temperature sensor, pressure sensor, and temperature measurement is single
Member, temperature control unit, pressure control unit, resistivity measurement unit, permeability survey unit, acoustic measurement unit, and
Gas volume demarcates temperature sensor, pressure sensor and the data processing and the connection of signal control unit of room.
The utility model has the advantages that:
The utility model realizes a kind of gas hydrates reservoir original position property parameter simulation test macro, is directed to quilt
The gas hydrates reservoir of simulation is based on sound wave and electricity earth physical testing principle, can get by simulated experiment mode
The geophysical parameters such as the reservoir properties such as porosity, permeability, hydrate concentration of reservoir parameter and its sound wave, resistivity it
Between incidence relation, resource assessment and the exploitation engineering conceptual design of gas hydrates can be effectively served in, to pass through ground
The home state key reservoir property parameter that ball physical testing technological means obtains gas hydrates reservoir provides related number
According to associated reliable basis.
Detailed description of the invention
Fig. 1 is the composition schematic diagram of the utility model gas hydrates reservoir original position property parameter simulation test macro.
Fig. 2 is a preferred embodiment of the utility model gas hydrates reservoir original position property parameter simulation test macro
Schematic diagram.
Fig. 3 is the composition schematic diagram of pressurizing pack.
Fig. 4 is the composition schematic diagram of acoustic measurement unit.
Specific embodiment
As shown in Figure 1, the utility model gas hydrates reservoir original position property parameter simulation test macro includes filling
The simulating chamber 10 of filler, filler is for simulating gas hydrates reservoir；Simulating chamber 10 and temperature measurement unit 50, temperature control
Unit 40, resistivity measurement unit 20, permeability survey unit 70, acoustic measurement unit 30 and gas volume calibration room 80 connect
It connects, pressure control unit 60 is connect with simulating chamber 10 and gas volume calibration room 80, and gas volume calibration room 80 is equipped with temperature
Sensor 81, pressure sensor 82, temperature sensor 81, pressure sensor 82 are respectively used for measuring in gas volume calibration room 80
Temperature, pressure, temperature measurement unit 50, temperature control unit 40, pressure control unit 60, resistivity measurement unit 20, seep
Actuating means, the gas volumes such as saturating rate measuring unit 70, the sensor in acoustic measurement unit 30 and switch valve demarcate room 80
Temperature sensor 81, pressure sensor 82 are connect with data processing and signal control unit (not shown).
Such as Fig. 2, simulating chamber 10 includes cavity, and cavity two-port is separately installed with injection plug 13, output plug 14, cavity
Inner wall is made of isolation material, is equipped with anti-clogging strainer, chamber in the inlet of injection plug 13, the delivery outlet of output plug 14
It is equipped in vitro and reinforces 10 axial strength of simulating chamber to prevent the reinforcement lead screw that axial bending occurs because being pressurized.
In the present invention, injection plug 13, output plug 14 answer Seal Design, can need to connect according to each unit
Related device, such as valve should be sealed connection and detachable, with convenient between injection plug 13, output plug 14 and cavity
Filler in filling, replacement cavity.
In actual implementation, because gas hydrates synthesis needs to carry out in the environment of high pressure low temperature, so simulating chamber
10 cavitys need to be made of high pressure resistant material, and voltage endurance capability should ensure 35MPa, and temperature capacity range covers -20 DEG C
~50 DEG C, cavity can be designed in cylindrical body.
In actual design, with reference to Fig. 2, temperature control unit 40 includes the cryogenic fluid collet tightly invested on chamber outer wall
41, cryogenic fluid collet 41 connects cryogenic fluid and supplies flow path (not shown), and cryogenic fluid collet 41 is externally provided with insulating layer
42, wherein cryogenic fluid supplies flow path and controls the fluid of disengaging cryogenic fluid collet 41, to reach cryogenic fluid collet
41 adjust cavity inner temperature, and cavity is made to be in the purpose of set temperature, and cryogenic fluid supplies flow path by data processing and signal pipe
Control the control of unit.The existing device and conventional design that cryogenic fluid supplies flow path, cryogenic fluid collet 41 is this field.
In the present invention, if temperature measurement unit 50 includes 52 He of dry temperature sensor being mounted on cavity inner wall
If being mounted on chamber outer wall, the dry temperature sensor 51 between cavity and cryogenic fluid collet 41, temperature sensor 51,
52 signal port is connect with the corresponding signal port of data processing and signal control unit.Temperature sensor 51 is used for test chamber
Body temperature, temperature sensor 52 are used for test chamber cryogenic fluid temperature, and temperature data is fed back to data processing by them
It carries out the operation such as handling with signal control unit.
With reference to Fig. 3, pressure control unit includes gas pressure regulating valve and pressurizing pack 61, and the gas transmission import of pressurizing pack 61 is logical
It crosses the first multi-pass control valve 101 to connect with methane gas source 200 and work gas source 300, the gas transmission outlet of pressurizing pack 61 and gas
The air inlet of pressure regulator valve 62 connects, and the gas outlet of gas pressure regulating valve 62 is connect with the air inlet of the second multi-pass control valve 102, and second
One gas outlet of multi-pass control valve 102 is connect with the inlet of injection plug 13, another gas outlet of the second multi-pass control valve 102
With gas volume calibration room 80 gas access connect, gas volume demarcate room 80 gas vent, penetrate through outside discharge outlet
It is connected between 90 and the inlet three of injection plug 13 by third multi-pass control valve 103.Gas pressure regulating valve 62, pressurizing pack
61, the first multi-pass control valve 101, the second multi-pass control valve 102, the signal port of third multi-pass control valve 103 and data processing
It is connected with the corresponding signal port of signal control unit.
In the present invention, pressure control unit 60 is for adjusting and the intracorporal pressure of control chamber and gas volume
Demarcate the pressure of room 80.
Such as Fig. 3, pressurizing pack 61 includes booster pump 612, and the air inlet of booster pump 612 passes through the first multi-pass control valve 101
It is connect with methane gas source 200 and work gas source 300, the gas outlet of booster pump 612 is via high pressure gas storage tank 613 and gas pressure regulation
The air inlet of valve 62 connects, the air inlet of booster pump 612, the air inlet of high pressure gas storage tank 613, high pressure gas storage tank 613
Gas outlet is equipped with the counterbalance valve 614 for preventing fluid from returning.Booster pump 612 connects air compressor 611, and booster pump 612 is in sky
It works under the auxiliary drive of air compressor 611.The output pressure of booster pump 612 should be able to reach 60MPa.
In actual operation, methane gas source 200, work gas source 300 in gas can pass through booster pump 612, gas pressure regulation
Valve 62, the second multi-pass control valve 102, inject plug 13 inlet be sent directly into 10 cavity of simulating chamber, booster pump can also be passed through
612, gas pressure regulating valve 62, the second multi-pass control valve 102 are sent into gas volume calibration room 80.Gas volume is demarcated in room 80
Gas can be sent into 10 cavity of simulating chamber by the inlet of third multi-pass control valve 103, injection plug 13.
In the present invention, with reference to Fig. 2, resistivity measurement unit 20 includes being annularly distributed on cavity, insulating with cavity
Several circle resistivity measurement electrodes, the signal port and the phase of resistivity test device (not shown) of resistivity measurement electrode
The connection of induction signal port, resistivity test device are to receive the electric signal of resistivity measurement electrode-feedback and calculated based on electric signal
The electronic equipment (this field existing device) of resistivity out, the signal port and data processing and signal pipe of resistivity test device
Control the corresponding PORT COM connection of unit, in which: each circle resistivity measurement electrode is along simulating chamber length direction uniform cloth at equal intervals
If；Several resistivity measurement points 21 are uniformly provided on every circle resistivity measurement electrode, the probe on resistivity measurement point 21 runs through
Cavity probes into inner cavity, has good insulating properties and leakproofness between probe and cavity.
Such as Fig. 2 and Fig. 4, acoustic measurement unit 30 includes several pairs of acoustic dipoles being mounted on cavity inner wall, each pair of sound
Dipole installs in opposite directions, is evenly distributed on the interlude of cavity at equal intervals along simulating chamber length direction, in which: even for each pair of sound
Extremely sub, 31 through cavities of acoustic dipole is connect with external acoustic emission apparatus 33, another acoustic dipole 32 runs through chamber
Body is connect with external acoustic receiver device 34, at acoustic emission apparatus 33, the signal port of acoustic receiver device 34 and data
It manages corresponding with signal control unit PORT COM to connect, with good insulating properties and close between acoustic dipole 31,32 and cavity
Feng Xing.Acoustic emission apparatus 33 emits acoustic signals to opposite acoustic dipole 32 via acoustic dipole 31, works as acoustic signals
Across filler, after being received by acoustic dipole 32, acoustic dipole 32 sends received acoustic signals to acoustic receiver device 34,
To complete a sonic detection.Acoustic receiver device 34 can be connected with oscillograph.
In the present invention, permeability survey unit 70 includes the gas pressure connecting with the inlet of injection plug 13
Meter 71, and the output gas flow of gas observing and controlling valve 73, the gas pressure measurement meter 72 that are connect with the delivery outlet of output plug 14,
Gas pressure measurement meter 71,72, the signal port of output gas flow of gas observing and controlling valve 73 it is single with data processing and signal control respectively
The corresponding PORT COM connection of member.
In actual operation, output gas flow of gas observing and controlling valve 73 is used to measure and control the gas flow of the output of simulating chamber 10
In steady state, thus in this case, based on gas pressure measurement 71,72 measure simulating chamber 10 gases input,
Gas pressure at output port, for use in permeability is calculated.
In the present invention, data processing and signal control unit are for receiving temperature measurement unit 50, resistivity survey
The measurement data of the feedbacks such as unit 20, permeability survey unit 70, acoustic measurement unit 30 is measured, and to temperature control unit
40, pressure control unit 60 etc. is manipulated, and data processing and signal control unit may include single-chip microcontroller or microprocessor, can also
To be computer system, technology known in the art is consisted of, therefore is not described in detail herein.
In the present invention, it since the caliber of 10 cavity of simulating chamber is little, and is wrapped up by cryogenic fluid collet 41, therefore
Cavity in the radial direction, temperature, pressure gap very little.But on cavity length direction, due to cryogenic fluid collet 41
Liquid in-out mouth is generally arranged on the both ends of its length direction, therefore the difference of the temperature, pressure on cavity length direction is just
It can not ignore.Therefore, the utility model is used is uniformly distributed temperature sensor along 10 length direction of simulating chamber at equal intervals, along mould
Intend room length direction uniformly distributed resistivity measurement electrode at equal intervals.For acoustic dipole, relative position can not change,
It must lay in pairs, several pairs of acoustic dipoles are generally evenly distributed on to the middle area of cavity at equal intervals along simulating chamber length direction
Domain (i.e. along the middle section that simulating chamber length direction is seen).
Since the mixed gas in simulating chamber 10 is there are inflammable and explosive dangerous hidden danger, cavity inner wall should be coated with
Anti-static coating or cavity are lined with insulating sleeve.In addition, cavity can also carry out crack resistence, the processing of enhancing degree, to guarantee container
Security performance.
It should be noted that the variation of resistivity is a difficult point in detection sediment.Existing detection method is to adopt
It is intracavitary that measurement is arranged in plug-type electrode column.It, can be right since electrode column itself and lead are intracavitary all in measuring
It is measured resistivity field and generates certain influence, leading to the collection result of resistivity, there are biggish errors.For having detection side
Measuring tool is changed to resistivity measurement point by electrode column by the deficiency of method, the utility model, and such as Fig. 2, arrangement is by plug-in type
Be changed to cylindrical annular distribution mode, i.e., by the measurement point ring-type of resistivity measurement electrode around cloth on cavity, at such lead
In outside cavity, only the probe of 3mm is probeed into cavity and is measured length, so influencing very little.Also, due to most interior in filler
The resistivity of the gas hydrates in portion is not easy directly to measure, therefore in actual implementation, the utility model takes indirect measurement side
Method after powering to filler, on same resistivity measurement electrode, measures the voltage between two resistivity measurement points 21 thereon
Drop is to achieve the purpose that measured resistivity.
In the present invention, pressure sensor is preferably flat diaphragm type pressure sensor.
The natural gas that the utility model gas hydrates reservoir original position property parameter simulation test macro is realized below
Hydrate reservoir original position property parameter simulation test method is described in detail.
Gas hydrates reservoir original position property parameter simulation test method includes the following steps:
1) work purge of gas system, the air-tightness under detection system light condition are used；
2) system total spatial when measuring system light condition, and it is based on net cavity volume, calibrate system dead volume
Product；
3) filler for simulating gas hydrates reservoir is prepared；
4) cavity of simulating chamber 10 is filled up with the filler of preparation, cavity two-port passes through injection plug 13 respectively, output is blocked up
First 14 block；
5) air-tightness under test chamber material containing state；
6) 10 cavity of simulating chamber for filling up filler and coupled logical space are cleaned with working gas (such as nitrogen)；
7) gas flow of cavity output, and the gas of measurement cavity are measured and controlled by permeability survey unit 70
It inputs, the pressure of output port, calculates the original permeability of filler in 10 cavity of simulating chamber；
8) the total spare space volume of system under cavity material containing state, and system dead volume and net chamber based on calibration are measured
Body volume, calculates the initial void volume of filler in cavity, to obtain the initial porosity of filler；
9) synthesis of natural gas hydrate monitors acoustic wave parameter and resistance parameter in synthesis process and after the completion of synthesis；
10) the total spare space volume of system after the completion of the synthesis of measurement gas hydrates, and the system based on calibration is dead
Volume and net cavity volume, calculate the voidage of the filler containing gas hydrates, to obtain containing gas hydrates
Filler porosity, and then calculate gas hydrates saturation degree；
11) gas flow of cavity output, and the gas of measurement cavity are measured and controlled by permeability survey unit 70
Body input, output port pressure, calculate the permeability of the filler containing gas hydrates；
12) temperature and pressure is regulated and controled into the temperature and pressure to the gas hydrates reservoir being modeled, measurement is stored up
The acoustic wave parameter and resistance parameter of the filler containing gas hydrates under layer environmental condition；
13) gas hydrates reservoir original position property parameter simulation test terminates, subsequent to be analyzed and processed to data.
In actual operation, the air-leakage test process in step 1) and step 5) generally includes detection 10 cavity of simulating chamber
Leakproofness with injecting plug 13, exporting plug 14 itself, detects the leakproofness of each unit itself, test chamber and correlation unit
Between the leakproofness of each pipeline that is connected to, each pipeline being connected between detection injection plug 13 and correlation unit and output plug
The leakproofness for each pipeline being connected between 14 and correlation unit.In the present invention, air-leakage test is using the ripe of this field
Know technical method, therefore is not described in detail herein.
In the present invention, system total spatial refers under system light condition, the net cavity volume of simulating chamber 10 and
To the summation of related each pipeline of simulating chamber connection, each member lumens volume；Net cavity volume refers to the cavity of simulating chamber 10 certainly
The intrinsic volume of body；System dead volume refers to each pipeline of correlation, each member lumens body communicated therewith except 10 cavity of simulating chamber
Long-pending summation；The total spare space volume of system refers under cavity material containing state, volume shared by all gaps in cavity filler, and
The summation of the related each pipeline, each member lumens volume that are connected to simulating chamber 10.
In actual operation, step 2) includes the following steps:
2-1) simulating chamber 10 in confirmation in system light condition has been interconnected with gas volume calibration room 80, but right
In the case where outer closure, cutting gas volume demarcates the gas circuit between room 80 and simulating chamber 10, demarcates 80 note of room to gas volume
Enter working gas, until pressure is in setting range, the temperature T of working gas in measurement gas volume calibration room 800And pressure
Power P0, the temperature T and pressure P of simulating chamber 10 are measured, following formula 1 is passed through according to equation of state of real gas) and calculate gas volume
Demarcate the initial moles n of working gas in room 800:
Formula 1) in, V0The volume of room 80 is demarcated for gas volume, R is universal gas constant (8.31kPaLmol-1·
K-1), a and b are the van der Waals correction amount (can check in from relevant speciality tool approach) of working gas,
2-2) the gas circuit between connection gas volume calibration room 80 and simulating chamber 10, to gas volume calibration room 80 and simulation
After reaching gas pressure balancing between room 10 and stablizing, the gas circuit is disconnected, working gas in measurement gas volume calibration room 80
Temperature T1With pressure P1, following formula 2 is passed through according to equation of state of real gas) and calculate remaining in gas volume calibration room 80 work
The molal quantity n of gas1:
Gas pressure P ' in simulating chamber 10 2-3) is measured after temperature T after gas temperature balance in simulating chamber 10, is based on gas
In body volume calibration room 80 in the variation of working gas molal quantity and simulating chamber 10 working gas pressure change, according to reality
The border equation of gas state passes through following formula 3) calculate system total spatial V:
Net cavity volume V ' 2-4) is deducted from system total spatial V, obtains system dead volume Vs, i.e. V-V '=Vs。
In actual operation, step 3) includes the following steps:
Take the deposit for picking up from gas hydrates reservoir to be simulated or 3-1) to simulate natural gas hydration to be simulated
Object reservoir and the deposit prepared, to pick up from the reservoir water of gas hydrates reservoir to be simulated or to simulate day to be simulated
Right gas hydrate reservoir and the reservoir water prepared sufficiently is soaked, is mixed,
3-2) by the deposit of aqueous gas hydrates reservoir to be simulated or it is aqueous simulate it is to be simulated natural
Gas hydrate reservoir and the deposit prepared is placed in -7 DEG C or less freezings, until moisture freezes completely as " sorbet ",
3-3) " sorbet " is smashed to pieces, mixed, is placed under low temperature (lower than -5 DEG C) and continues to freeze, it is spare.
" sorbet " referred in the utility model is different from sorbet existing for reality, for by the deposition of ice package and knot
Object or simulation sedimentary particle.
Step 1) and 6) in, working gas from work gas source 300 export, via the pressurization group for increasing gas pressure
Part 61, gas pressure regulating valve 62 are sent into 10 cavity of simulating chamber, to zero load or fill up 10 cavity of simulating chamber of filler and are connected to cavity
Space cleaned.
In actual operation, step 8) includes the following steps:
8-1) simulating chamber 10 in confirmation equipped with filler has been interconnected with gas volume calibration room 80, but externally closed
In the case of, the gas circuit between cutting gas volume calibration room 80 and simulating chamber 10 injects work gas to gas volume calibration room 80
Body, until pressure is in preset range, the temperature T of working gas in measurement gas volume calibration room 800With pressure P0, measurement
The temperature T and pressure P of simulating chamber 10, pass through equation 1 above according to equation of state of real gas) it calculates in gas volume calibration room 80
The initial moles n of working gas0,
8-2) the gas circuit between connection gas volume calibration room 80 and simulating chamber 10, to gas volume calibration room 80 and simulation
After reaching gas pressure balancing between room 10 and stablizing, the gas circuit is disconnected, working gas in measurement gas volume calibration room 80
Temperature T1With pressure P1, equation 2 above is passed through according to equation of state of real gas) and calculate remaining work in gas volume calibration room 80
The molal quantity n of gas1,
Gas pressure P ' in simulating chamber 10 8-3) is measured after temperature T after gas temperature balance in simulating chamber 10, is based on gas
In body volume calibration room 80 in the variation of working gas molal quantity and simulating chamber 10 working gas pressure change, according to reality
The border equation of gas state passes through following formula 3a) calculate the total spare space volume V of systemy1:
8-4) from the total spare space volume V of systemy1Middle deduction system dead volume Vs, obtain filler in 10 cavity of simulating chamber
Initial void volume Vf0, i.e. Vy1-Vs=Vf0,
8-5) by calculating initial void volume Vf0With the ratio of net cavity volume V ', the initial porosity of filler is obtained
In actual operation, step 10) includes the following steps:
10-1) in the case where the gas circuit that gas volume is demarcated between room 80 and simulating chamber 10 is in cutting, to gas body
Working gas is injected in product calibration room 80, until pressure is in the preset range greater than 10 pressure of simulating chamber, measures gas body
The temperature T of working gas in product calibration room 800With pressure P0, the temperature T and pressure P of simulating chamber 10 are measured, according to real gas shape
State equation passes through equation 1 above) calculate the initial moles n that gas volume demarcates working gas in room 800,
10-2) the gas circuit between connection gas volume calibration room 80 and simulating chamber 10 demarcates room 80 and mould to gas volume
After reaching gas pressure balancing between quasi- room 10 and stablize, the gas circuit is disconnected, measurement gas volume calibration office work gas
Temperature T1With pressure P1, equation 2 above is passed through according to equation of state of real gas) and calculate remaining work in gas volume calibration room 80
The molal quantity n of gas1,
10-3) gas pressure P ' in simulating chamber 10 is measured, is based on after temperature T after gas temperature balance in simulating chamber 10
Gas volume demarcates the pressure change of the variation of working gas molal quantity and working gas in simulating chamber 10 in room 80, according to
Equation of state of real gas passes through following formula 3b) calculate the total spare space volume V of systemy2:
10-4) from the total spare space volume V of systemy2Middle deduction system dead volume Vs, obtain simulating chamber 10 and include natural gas
The voidage V of the filler of hydratef1, i.e. Vy2-Vs=Vf1,
10-5) by calculating voidage Vf1With the ratio of net cavity volume V ', the filler containing gas hydrates is obtained
Porosity
10-6) in 10 cavity of calculating simulation room filler initial void volume Vf0Subtract the filler containing gas hydrates
Voidage Vf1Difference and 10 cavity of simulating chamber in filler initial void volume Vf0Ratio, obtain 10 cavity of simulating chamber
Gas hydrates saturation degree S in interior fillerH, i.e. (Vf0-Vf1)/Vf0=SH。
In actual operation, step 9) includes the following steps:
The initial void volume V of filler in 10 cavity of simulating chamber 9-1) measured according to step 8)f0, and the mesh simulated
Hydrate concentration s is marked, following formula 4 is based on) calculate the volume V that the methane gas that needs are passed through is under standard stateMethane:
VMethane=164 × Vf0× s 4),
10 cavity inner temperature of simulating chamber 9-2) is controlled by temperature control unit 40, cavity temperature is made to be reduced to set temperature
In range, and temperature constant state is maintained,
9-3) according to The Ideal-Gas Equation, the molal quantity n for the methane gas being passed through needed for 5) calculating according to the following formulaMethane:
9-4) with methane gas purge gas volume calibration room 80,
The volume V of room 80 9-5) is demarcated according to gas volume0And its temperature T of current methane gasMethane, pass through pressure control
Unit 60 processed fills methane gas to gas volume calibration room 80, until methane gas pressure reaches in gas volume calibration room 80
The pressure value P 6) being calculated as the following formula based on equation of state of real gasMethane:
Formula 6) in, aMethaneAnd bMethaneIt (can be looked into from relevant speciality tool approach for the van der Waals correction amount of methane gas
),
Working gas 9-6) is passed through by pressure control unit 60, the methane gas that gas volume is demarcated in room 80 is pressed into
10 cavity of simulating chamber, and it is increased to gas pressure in 10 cavity of simulating chamber in setting pressure limit, and maintain pressure constant state,
With synthesis of natural gas hydrate,
9-7) in the synthesis process of gas hydrates and after the completion of synthesis, pass through acoustic measurement unit 30 and resistivity
The acoustic wave parameter and resistance parameter that measuring unit 20 monitors, records and show filler in 10 cavity of simulating chamber,
9-8) when sound wave and resistance parameter signal are in continual and steady state, show to have reached gas hydrates
It generates and dissociation state, the at this time monitoring of stopping acoustic wave parameter and resistance parameter.
In actual design, the original permeability of step 7), the permeability of step 11) pass through formulaIt calculates, in this formula:
A is sectional area (the unit cm of 10 cavity inner cavity of simulating chamber2),
L is the cavity length (unit cm) of 10 cavity of simulating chamber,
PinFor the pressure (unit 0.1MPa) at the gas entry ports of 10 cavity of simulating chamber,
PoutFor the pressure (unit 0.1MPa) at the gas output end mouth of 10 cavity of simulating chamber,
P00For environment atmospheric pressure (unit 0.1MPa),
μ is the viscosity (unit mPa.s) of working gas,
Q0For gas flow (the unit cm at the gas output end mouth of 10 cavity of simulating chamber2/s)。
In actual operation, in step 12):
The temperature and pressure of 10 cavity of simulating chamber is regulated and controled to by mould by temperature control unit 40, pressure control unit 60
Then the temperature and pressure of quasi- gas hydrates reservoir is surveyed by acoustic measurement unit 30 and resistivity measurement unit 20
Acoustic wave parameter and resistance parameter fixed, record and show the filler containing gas hydrates under the conditions of acquisition reservoir environment.
The utility model has the advantages that:
The test simulation result that Tthe utility model system obtains is accurate and reliable, highly-safe, easy to operate, can be used for being directed to
The gas hydrates reservoir being modeled is based on sound wave and electricity earth physical testing principle, is obtained by simulated experiment mode
The geophysical parameters such as the reservoir properties such as porosity, permeability, hydrate concentration of reservoir parameter and its sound wave, resistivity it
Between incidence relation, resource assessment and the exploitation engineering conceptual design of gas hydrates can be effectively served in, to pass through ground
The home state key reservoir property parameter that ball physical testing technological means obtains gas hydrates reservoir provides related number
According to associated reliable basis.
The above is the utility model preferred embodiment and its technical principle used, for those skilled in the art
It is any based on technical solutions of the utility model basis without departing substantially from the spirit and scope of the utility model for member
On equivalent transformation, simple replacement etc. it is obvious change, belong within scope of protection of the utility model.
Claims (4)
1. a kind of gas hydrates reservoir original position property parameter simulation test macro, it is characterised in that: it includes filling filler
Simulating chamber, filler is for simulating gas hydrates reservoir；Simulating chamber and temperature measurement unit, temperature control unit, resistance
Rate measuring unit, permeability survey unit, acoustic measurement unit are connected with gas volume calibration room, pressure control unit and simulation
Room, gas volume calibration room connection, gas volume calibration room are equipped with temperature sensor, pressure sensor, temperature measurement unit,
Temperature control unit, pressure control unit, resistivity measurement unit, permeability survey unit, acoustic measurement unit and gas
Temperature sensor, pressure sensor and the data processing of volume calibration room and the connection of signal control unit.
2. gas hydrates reservoir as described in claim 1 original position property parameter simulation test macro, it is characterised in that:
The simulating chamber includes cavity, and cavity two-port is separately installed with injection plug, output plug, and cavity inner wall is insulation material
Matter is made, inject plug inlet, export plug delivery outlet in anti-clogging strainer is installed.
3. gas hydrates reservoir as claimed in claim 2 original position property parameter simulation test macro, it is characterised in that:
The temperature control unit includes the cryogenic fluid collet tightly invested on the chamber outer wall, cryogenic fluid collet connection system
Cold fluid supplies flow path, and cryogenic fluid collet is externally provided with insulating layer；
If the temperature measurement unit includes the dry temperature sensor being mounted on the cavity inner wall and is mounted on the cavity
If the dry temperature sensor on outer wall, between the cavity and cryogenic fluid collet；
The pressure control unit includes gas pressure regulating valve and pressurizing pack；The gas transmission import of pressurizing pack passes through the first multi-pass control
Valve processed is connect with methane gas source and work gas source, and the gas transmission outlet of pressurizing pack and the air inlet of gas pressure regulating valve connect；Gas
The gas outlet of pressure regulator valve is connect with the air inlet of the second multi-pass control valve, a gas outlet of the second multi-pass control valve and the injection
The inlet of plug connects, and the gas access of another gas outlet of the second multi-pass control valve and gas volume calibration room connects
It connects；The external discharge outlet of the gas vent of gas volume calibration room, perforation and the inlet three for injecting plug it
Between by third multi-pass control valve connect；
The resistivity measurement unit includes several circle resistivity measurements electricity being annularly distributed on the cavity, with cavity insulation
Pole, resistivity measurement electrode are connect with resistivity test device, in which: each circle resistivity measurement electrode is along the simulating chamber length
Direction is uniformly distributed at equal intervals；Several resistivity measurement points, resistivity measurement point are uniformly provided on every circle resistivity measurement electrode
On probe through the cavity probe into it is intracavitary；
The acoustic measurement unit include be mounted on it is several to the acoustic dipole installed in opposite directions, each pair of sound on the cavity inner wall
Dipole is evenly distributed on the interlude of the cavity along the simulating chamber length direction at equal intervals, in which: even for each pair of sound
Extremely sub, an acoustic dipole connect through the cavity with acoustic emission apparatus, another acoustic dipole run through the cavity and
The connection of acoustic receiver device；
The permeability survey unit includes the gas pressure measurement meter connecting with the inlet of injection plug, and stifled with output
The output gas flow of gas observing and controlling valve and gas pressometer of the delivery outlet connection of head.
4. gas hydrates reservoir as claimed in claim 3 original position property parameter simulation test macro, it is characterised in that:
The pressurizing pack includes booster pump, and the air inlet of booster pump passes through the first multi-pass control valve and the methane gas source
It is connected with the work gas source, the gas outlet of booster pump connects via the air inlet of high pressure gas storage tank and the gas pressure regulating valve
It connects, the air inlet of booster pump, the air inlet and air outlet of high pressure gas storage tank are equipped with the counterbalance valve for preventing fluid from returning；Pressurization
Pump is connected with air compressor, to work under the auxiliary drive of air compressor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655373A (en) * | 2018-12-25 | 2019-04-19 | 国家地质实验测试中心 | Gas hydrates reservoir original position property parameter simulation test macro and method |
| CN110907336A (en) * | 2019-12-24 | 2020-03-24 | 江西省科学院能源研究所 | Experimental simulation device and method for determining distribution of hydrate in porous medium |
| CN113188973A (en) * | 2021-04-29 | 2021-07-30 | 哈尔滨工程大学 | Device and method for measuring permeability evolution characteristics of hydrate deposit layers in different occurrence forms |
| CN113959923A (en) * | 2021-10-25 | 2022-01-21 | 中国地质调查局油气资源调查中心 | Evaluation method of natural gas hydrate unconsolidated reservoir porous medium framework reinforcing material |
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2018
- 2018-12-25 CN CN201822193277.7U patent/CN209446419U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109655373A (en) * | 2018-12-25 | 2019-04-19 | 国家地质实验测试中心 | Gas hydrates reservoir original position property parameter simulation test macro and method |
| CN110907336A (en) * | 2019-12-24 | 2020-03-24 | 江西省科学院能源研究所 | Experimental simulation device and method for determining distribution of hydrate in porous medium |
| CN113188973A (en) * | 2021-04-29 | 2021-07-30 | 哈尔滨工程大学 | Device and method for measuring permeability evolution characteristics of hydrate deposit layers in different occurrence forms |
| CN113188973B (en) * | 2021-04-29 | 2023-11-17 | 哈尔滨工程大学 | Device and method for measuring permeability evolution characteristics of hydrate deposit layers with different occurrence forms |
| CN113959923A (en) * | 2021-10-25 | 2022-01-21 | 中国地质调查局油气资源调查中心 | Evaluation method of natural gas hydrate unconsolidated reservoir porous medium framework reinforcing material |
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