CN203929587U - Rock core gas in-situ adsorption testing device - Google Patents
Rock core gas in-situ adsorption testing device Download PDFInfo
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- CN203929587U CN203929587U CN201420275375.4U CN201420275375U CN203929587U CN 203929587 U CN203929587 U CN 203929587U CN 201420275375 U CN201420275375 U CN 201420275375U CN 203929587 U CN203929587 U CN 203929587U
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- 238000012360 testing method Methods 0.000 title claims abstract description 90
- 239000011435 rock Substances 0.000 title claims abstract description 33
- 238000001179 sorption measurement Methods 0.000 title description 27
- 238000011065 in-situ storage Methods 0.000 title 1
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 22
- 230000006835 compression Effects 0.000 claims description 18
- 238000007906 compression Methods 0.000 claims description 18
- 229920002545 silicone oil Polymers 0.000 claims description 6
- 230000001737 promoting effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 185
- 239000000523 sample Substances 0.000 description 134
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000001307 helium Substances 0.000 description 7
- 229910052734 helium Inorganic materials 0.000 description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000012937 correction Methods 0.000 description 6
- 238000003795 desorption Methods 0.000 description 5
- 239000011261 inert gas Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000004375 physisorption Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011234 economic evaluation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001915 proofreading effect Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The embodiment of the utility model provides a gaseous normal position of rock core adsorbs testing arrangement, the device includes: the constant temperature box body is used for providing the temperature required by the test, a sample tank, a first pressure transmitter and a pressure loader are arranged in the constant temperature box body, a gas increasing device and a stress loading device are arranged outside the constant temperature box body, and the sample tank is used for placing a rock core sample to be tested; the gas adding device is used for injecting test gas into the sample tank to reach a preset test pressure value; the first pressure transmitter is used for acquiring pressure and temperature data of the sample tank after the gas increasing device injects the test gas into the sample tank; the stress loading device is used for providing pressure for the pressure loader; the pressure loader is used for converting the pressure provided by the stress loading device into confining pressure and axial pressure provided for the core sample in the sample tank. The utility model discloses test condition increases confined pressure and axle load when considering temperature, gas pressure, has improved the accuracy of absorption test measuring result.
Description
Technical field
The utility model relates to coal-seam gas original position adsorption instrument technical field, particularly a kind of rock core gas original position absorption proving installation.
Background technology
Coal-seam gas and shale gas are to compose a kind of unconventional rock gas that is ADSORPTION STATE, free state and solubilised state existing in coal seam and shale.Wherein adsorbed gas is most important store status, and mechanism is physisorption.Physisorption is with the gas molecule around the Van der Waals for absorption of particle surface, is a kind of physical adsorption process carrying out at solid surface, meets Langmuir equation at constant temperature.In isothermal adsorption process, pressure has a significant effect to suction-operated, increases gradually with the increase adsorbance of pressure.Test accurately coal petrography and shale adsorptive power all significant to evaluating reservoir, development plan design and economic evaluation.
In the prior art, isothermal adsorption proving installation has following several function: possess the function of measuring the Adsorption Isotherms in low pressure porous permeable solid; Can measure the adsorption and desorption isotherm of periporate powder solid surface water vapor; Can measure the adsorption and desorption isotherm of irregular solid surface mixed gas.But above-mentioned isothermal adsorption proving installation exists following defect: test pressure is less than 12MPa, temperature is less than 60 DEG C, can not meet the needs of coal-seam gas and shale gas High Temperature High Pressure.
In addition, in the prior art, a kind of " High Temperature High Pressure rock core gas absorption proving installation " is also provided, mainly formed by thermostatic box, the temperature-controlling system, temp measuring system, pressure testing system, gas storing system, the adsorption system that are placed in thermostatic box, this device has high, medium and low three cover pressure tester and multiple air storage chambers, and the core sample chamber of adsorption system also comprises multiple known volume calibrated bolcks.This device can be in larger temperature, pressure limit, the absorption/desorption isotherm of the fixed state core sample of accurately measuring different characteristic to all kinds of single, multicomponent gases.A kind of " high-temperature high-pressure adsorption tester " is also provided, this high-temperature high-pressure adsorption tester comprises gas pressurized device, adsorbent equipment, temperature control equipment, jacking gear and data acquisition system (DAS), for coal-seam gas, shale gas isothermal adsorbance, desorption quantity test under different pressures condition.Although above-mentioned two kinds of devices can meet isothermal adsorption amount, the desorption quantity test of coal-seam gas and shale gas High Temperature High Pressure, but the test condition that above-mentioned two kinds of devices provide all can not represent coal-seam gas and the shale gas true adsorbed state in reservoir, therefore, make measurement result inaccurate.
Utility model content
The utility model embodiment provides a kind of rock core gas original position absorption proving installation, has solved the inaccurate technical matters of measurement result in prior art.
The utility model embodiment provides a kind of rock core gas original position absorption proving installation, this device comprises: thermostatic box, for providing test required temperature, in described thermostatic box, be provided with sample pot, the first pressure unit and pressure-loaded device, described thermostatic box is provided with gas outward increases device and stress loading device, wherein, described sample pot, for placing core sample to be tested; The gas vent that described gas increases device is connected with described sample pot, and described gas increases device for inject test gas in described sample pot, and reaches default test pressure value; Described the first pressure unit is connected to described gas and increases on the pipeline between gas vent and the described sample pot of device, and described the first pressure unit is used for gathering the pressure and temperature data of described sample pot; The gas vent of described stress loading device is connected with described pressure-loaded device, and described stress loading device is for providing pressure to described pressure-loaded device; Described pressure-loaded device is converted to for the pressure that described stress loading device is provided the confined pressure and the axial compression that provide to the core sample of described sample pot, and described sample pot is sleeved in described pressure-loaded device.
In one embodiment, described stress loading device comprises: silicone oil bottle; Supercharge pump, the entrance of described supercharge pump is connected with described silicone oil bottle; The first valve, one end of described the first valve is connected with described supercharging delivery side of pump, and the other end is the gas vent of described stress loading device, is connected with described pressure-loaded device.
In one embodiment, in described thermostatic box, also comprise: three-way switch valve, the second pressure unit, with reference to tank, proving tank and the second valve, wherein, the gas access of described three-way switch valve is connected with the gas vent that described gas increases device, the gas vent of described three-way switch valve is connected with described sample pot, described the first pressure unit is connected on the pipeline between gas vent and the described sample pot of described three-way switch valve, the mouth of often outputing of described three-way switch valve is connected with the described gas access with reference to tank, the described gas vent with reference to tank is connected with one end of the second valve, the other end of described the second valve is connected with the gas access of proving tank, described the second pressure unit is connected to often outputing mouthful of described three-way switch valve and described with reference on the pipeline between the gas access of tank, described the second pressure unit is for gathering the described pressure and temperature data with reference to tank, described with reference to tank and described proving tank for injecting the gas of preset pressure value, for the volume and the inner space volume of described sample pot under described default test pressure value that calculate the described volume with reference to tank, described proving tank provide data.
In one embodiment, in described thermostatic box, also comprise: multiple described pressure-loaded devices, multiple described sample pots, multiple described the first pressure units, multiple described the second pressure units, multiple described three-way switch valves, multiple described with reference to tank, multiple described proving tanks and multiple described the second valve, wherein, each described sample pot is sleeved in a described pressure-loaded device, each described pressure-loaded device is connected with the gas vent of described stress loading device, each described sample pot is connected with the gas vent of a described three-way switch valve, the gas access of this described three-way switch valve is connected with the gas vent that described gas increases device, the mouth of often outputing of this described three-way switch valve is connected with a described gas access with reference to tank, this the described gas vent with reference to tank is connected with one end of described second valve, the other end of this described second valve is connected with the gas access of a described proving tank, each described the first pressure unit is connected on the pipeline between gas vent and a described sample pot of a described three-way switch valve, the gas that each described the second pressure unit is connected to a described three-way switch valve often output mouthful and one described with reference on the pipeline between tank.
In one embodiment, also comprise: lifting table, be connected with the gas access end of described three-way switch valve, described lifting table is for promoting or reducing described three-way switch valve, related described sample pot is lifted out to described thermostatic box or is reduced in described thermostatic box.
In one embodiment, also comprise: the 3rd valve, described the 4th one end of valve and the gas access of described three-way switch valve are connected; Vacuum pump, is connected with the other end of described the 3rd valve, and described vacuum pump is for getting rid of described sample pot, described with reference to the air in tank and described proving tank.
In one embodiment, described sample pot cavity that be closed at both ends, column.
In one embodiment, the diameter of described sample pot is that 3.8 centimetres, length are 10 centimetres.
In the utility model embodiment, by place the core sample of test in sample pot, and sample pot is positioned in thermostatic box, for sample pot provides test required temperature, thermostatic box can provide the probe temperature of different range, increasing device by gas injects test gas in sample pot, and reach default test pressure value, can reach the test pressure requirement of different range, meanwhile, the pressure that pressure-loaded device provides stress loading device is converted to confession confined pressure and the axial compression proposed to the core sample in sample pot.Because utility model people finds in the prior art, test condition is only considered temperature, gaseous tension, this test condition (for example can not represent rock core gas, coal-seam gas and shale gas etc.) true adsorbed state in reservoir, therefore, pressure stress loading device being provided by pressure-loaded device is converted to confession confined pressure and the axial compression proposed to the core sample in sample pot, realize test condition and considered temperature, when gaseous tension, add confined pressure and axial compression, make test condition more approach the true adsorbed state of rock core gas in reservoir, thereby improve the accuracy of the measurement result of rock core gas original position absorption test, it can be resource evaluation, individual well mining, numerical simulations etc. provide more reliable isothermal adsorption curve and data.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structured flowchart of a kind of rock core gas original position absorption proving installation that provides of the utility model embodiment;
Fig. 2 is the instantiation figure of a kind of rock core gas original position absorption proving installation that provides of the utility model embodiment;
Fig. 3 is the structural representation of a kind of three-way switch valve of providing of the utility model embodiment;
Fig. 4 is that a kind of rock core gas original position that the utility model embodiment provides is adsorbed the process flow diagram of proving installation work.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with embodiment and accompanying drawing, the utility model is described in further details.At this, exemplary embodiment of the present utility model and explanation thereof are used for explaining the utility model, but not as to restriction of the present utility model.
In the utility model embodiment, a kind of rock core gas original position absorption proving installation is provided, as shown in Figure 1, this device comprises:
Thermostatic box 27, for providing test required temperature, is provided with sample pot 21, the first pressure unit 23 and pressure-loaded device 22 in described thermostatic box 27, the outer gas that is provided with of described thermostatic box 27 increases device 101 and stress loading device 102, wherein,
Described sample pot 21, for placing core sample to be tested;
The gas vent that described gas increases device 101 is connected with described sample pot 21, and described gas increases device 101 for to the interior injection test gas of described sample pot 21, and reaches and preset test pressure value;
Described the first pressure unit 23 is connected to described gas and increases on the pipeline between gas vent and the described sample pot 21 of device 101, described the first pressure unit 23 for the pressure and temperature data that gather described sample pot 21 (for example, described gas increases device 101 and injects after described test gas to described sample pot 21, gathers the pressure and temperature data of described sample pot 21);
The gas vent of described stress loading device 102 is connected with described pressure-loaded device 22, and described stress loading device 102 is for providing pressure to described pressure-loaded device 22;
The confined pressure and the axial compression that provide to the core sample of described sample pot 21 are provided for the pressure that described stress loading device 102 is provided described pressure-loaded device 22, and described sample pot 21 is sleeved in described pressure-loaded device 22.
Known as shown in Figure 1, in the utility model embodiment, by place the core sample of test in sample pot, and sample pot is positioned in thermostatic box, for sample pot provides test required temperature, thermostatic box can provide the probe temperature of different range, by test gas (for example increase device by gas, CH4, the absorbing gas such as CO2) inject in sample pot, and reach default test pressure value, can reach the test pressure requirement of different range, simultaneously, the pressure that pressure-loaded device provides stress loading device is converted to confession confined pressure and the axial compression proposed to the core sample in sample pot.Because utility model people finds in the prior art, test condition is only considered temperature, gaseous tension, this test condition (for example can not represent rock core gas, coal-seam gas and shale gas etc.) true adsorbed state in reservoir, therefore, pressure stress loading device being provided by pressure-loaded device is converted to confession confined pressure and the axial compression proposed to the core sample in sample pot, realize test condition and considered temperature, when gaseous tension, add confined pressure and axial compression, make test condition (for example more approach rock core gas, coal-seam gas and shale gas etc.) true adsorbed state in reservoir, thereby improve the accuracy of the measurement result of rock core gas original position absorption test, it can be resource evaluation, individual well mining, numerical simulations etc. provide more reliable isothermal adsorption curve and data.
By the structure shown in Fig. 1, the pressure and temperature data of the described sample pot after the injection test gas that the volume of tank 21 and the first pressure unit 23 gather per sample, calculate the isothermal adsorption amount of described core sample to described test gas.
When concrete enforcement, the cavity that described pressure-loaded device is column, can be by the cavity in pressure-loaded device equably for core sample provides confined pressure and axial compression simultaneously, avoid directly sample tank skin to exert pressure to provide confined pressure and axial compression and the inhomogeneous problem of pressure that causes.
When concrete enforcement, as shown in Figure 2, above-mentioned gas increases device 101 can be realized by gas cylinder 1, the first supercharge pump 2 and valve 3, gas cylinder 1 is connected with the first supercharge pump 2, the first supercharge pump 2 is connected with one end of valve 3, the other end of valve 3 increases the gas vent of device 101 as gas, is connected with one end of the first pressure unit 23, and then to the interior injecting gas of described sample pot 21.
When concrete enforcement, as shown in Figure 2, above-mentioned stress loading device 102 can be made up of silicone oil bottle 26, supercharge pump 25 and the first valve 24, the entrance of described supercharge pump 25 is connected with described silicone oil bottle, one end of described the first valve 24 is connected with the outlet of described supercharge pump 25, the other end is the gas vent of described stress loading device 102, is connected with described pressure-loaded device 22, provides confined pressure and axial compression by described pressure-loaded device 22 for the core sample in described sample pot.
For the free space volumes that can calculate sample pot in different pressures test process changes, and then adsorbed really parameter, as Fig. 2, shown in 3, in the present embodiment, in described thermostatic box, also comprise: three-way switch valve 20, the second pressure unit 17, with reference to tank 18, proving tank 19 and the second valve 28, wherein, wherein, the gas access 201 of described three-way switch valve 20 is connected with the gas vent that described gas increases device 101, the gas vent 202 of described three-way switch valve 20 is connected with described sample pot 21, described the first pressure unit 23 is connected on the pipeline between gas vent 202 and the described sample pot 21 of described three-way switch valve 20, the mouth 203 of often outputing of described three-way switch valve 20 is connected with the described gas access with reference to tank 18, the described gas vent with reference to tank 18 is connected with one end of the second valve 28, the other end of described the second valve 28 is connected with the gas access of proving tank 19, what described the second pressure unit 17 was connected to described three-way switch valve 20 often outputs mouthfuls 203 and described with reference on the pipeline between the gas access of tank 18, described the second pressure unit 17 for example, for (gathering the described pressure and temperature data with reference to tank 18, described gas increase device 101 to described with reference to after tank 18 injecting gas, gather the described pressure and temperature data with reference to tank 18), described with reference to tank 18 and described proving tank 19 for injecting the gas of preset pressure value, for calculating the described volume with reference to tank, the volume of described proving tank and the described sample pot inner space volume under described default test pressure value provides data.
For example, calculate the described volume with reference to tank by following steps, the volume of described proving tank, open the first stifled card 204 of the gas access 201 of described three-way switch valve 20, adopt described gas increase device 101 to described with reference to the interior injection preset pressure value of tank 18 (for example, 2 MPas) helium, close the first stifled card 204 of the gas access 201 of described three-way switch valve 20, described stable with reference to the interior gaseous tension of tank 18 after, described the second pressure unit 17 gathers the described temperature and pressure data with reference to tank 18, open described the second valve 28, describedly be communicated with reference to tank 18 and described proving tank 19, described stable with reference to tank 18 and the interior gaseous tension of described proving tank 19 after, described the second pressure unit 17 gathers the described temperature and pressure data with reference to tank 18, again repeat to the described process with reference to tank 18 and the interior injection helium of described proving tank 19, in this process, in described proving tank 19, be placed with the steel ball of known volume, described the second pressure unit 17 gathers the described temperature and pressure data with reference to tank 18, the described temperature and pressure data with reference to tank 18 that gather in the process of twice injection helium according to described the second pressure unit 17, set up system of equations, calculate the volume of the described volume with reference to tank 18 and described proving tank 19,
Then, open the first stifled card 204 of the gas access 201 of described three-way switch valve 20, to the described inert gas with reference to the interior injection original pressure of tank 18 value, described original pressure value (is for example greater than described default test pressure value, described original pressure value is 1.2 times of left and right of described default test pressure value), described stable with reference to tank 18 internal gas pressures after, open the second stifled card 205 of the gas vent 202 of described three-way switch valve 20, be communicated with described with reference to tank 18 and described sample pot 21, force value while stablizing with reference to tank 18 and described sample pot 21 internal gas pressures if described is described default test pressure value (or the absolute value of the difference of force value when stable gas pressure and described default test pressure value is not more than 0.1 MPa), according to described default test pressure value, described original pressure value and the described volume with reference to tank, set up system of equations, calculate the inner space volume of described sample pot under described default test pressure value,
Finally, open the first stifled card 204 of the gas access 201 of described three-way switch valve 20, adopt described gas increase device 101 to described with reference to the described test gas of the interior injection of tank 18, and reach described default test pressure value, described stable with reference to tank 18 internal gas pressures after, described the second pressure unit 17 gathers the described temperature and pressure data with reference to tank 18, open the second stifled card 205 of the gas vent 202 of described three-way switch valve 20, be communicated with described with reference to tank 18 and described sample pot 21, described stable with reference to tank 18 and described sample pot 21 internal gas pressures after, described the first pressure unit 23 gathers the temperature and pressure data of described sample pot 21, described the second pressure unit 17 gathers the described temperature and pressure data with reference to tank 18,
Gather according to described the first pressure unit 23 inject described test gas to described sample pot 21 time temperature and pressure data, described the second pressure unit 17 gather to described temperature and pressure data, inner space volume and the described volume with reference to tank 18 of described sample pot 21 under described default test pressure value while injecting described test gas with reference to tank 18, calculate the isothermal adsorption amount of described core sample to described test gas.
In order to meet different testing requirements, in the utility model embodiment, in the described thermostatic box of rock core gas original position absorption proving installation, also comprise: multiple described pressure-loaded devices, multiple described sample pots, multiple described the first pressure units, multiple described the second pressure units, multiple described three-way switch valves, multiple described with reference to tank, multiple described proving tanks and multiple described the second valve, wherein, each described sample pot is sleeved in a described pressure-loaded device, each described pressure-loaded device is connected with the gas vent of described stress loading device, each described sample pot is connected with the gas vent of a described three-way switch valve, the gas access of this described three-way switch valve is connected with the gas vent that described gas increases device, the mouth of often outputing of this described three-way switch valve is connected with a described gas access with reference to tank, this the described gas vent with reference to tank is connected with one end of described second valve, the other end of this described second valve is connected with the gas access of a described proving tank, each described the first pressure unit is connected on the pipeline between gas vent and a described sample pot of a described three-way switch valve, the gas that each described the second pressure unit is connected to a described three-way switch valve often output mouthful and one described with reference on the pipeline between the gas access of tank.
For example, as shown in Figure 2, multiple described pressure-loaded devices, multiple described sample pots, multiple described the first pressure units, multiple described the second pressure units, multiple described three-way switch valves, multiple described with reference to tank, individual as example taking i in multiple described proving tanks and multiple described the second valve, describe connected mode in detail, i sample pot 15 is placed in described thermostatic box 27, i sample pot 15 is sleeved in i pressure-loaded device 16, i pressure-loaded device 16 is connected with the gas vent of described stress loading device, i sample pot 15 is connected with the gas vent of i three-way switch valve 14, the gas access of this i three-way switch valve 14 is connected with the gas vent that described gas increases device 101, the mouth of often outputing of this i three-way switch valve 14 is connected with reference to the gas access of tank 12 with i, this i the gas vent with reference to tank 12 is connected with one end of i the second valve 29, the other end of this i the second valve 29 is connected with the gas access of i proving tank 13, i the first pressure unit 30 is connected on the pipeline between i sample pot 15 and the gas vent of i three-way switch valve 14, i the second pressure unit 11 be connected to often outputing mouthful of i three-way switch valve 14 and i individual with reference on the pipeline between the gas access of tank 12.
Sample pot is lifted out to described thermostatic box loads and unloads sample or be reduced in described thermostatic box and test for convenient, in the present embodiment, as shown in Figure 2, also comprise: lifting table 4 (or 5), be connected with the gas access end of described three-way switch valve 20 (or 14), described lifting table is for promoting or reducing described three-way switch valve 20 (or 14), related described sample pot 21 (or 15) is lifted out to described thermostatic box or is reduced in described thermostatic box.
For improving the accuracy of measurement data, in the present embodiment, as shown in Figure 2, also comprise: the 3rd valve 6, one end of described the 3rd valve 6 is connected with the gas access of described three-way switch valve 20 (or 14); Vacuum pump 7, is connected with the other end of described the 3rd valve 6, and described vacuum pump 7 is for getting rid of described sample pot 21 (or 15), described with reference to the air in tank 18 (or 12) and described proving tank 19 (or 13).
In order to improve conventional efficient and control accuracy, reduce the error that manual operation may cause, in the present embodiment, as shown in Figure 2, also comprise:
Computing machine 10, be connected the pressure and temperature data that gather for obtaining described the first pressure unit and described the second pressure unit with described the first pressure unit 23 (or 30) and described the second pressure unit 17 (or 11) by data line 9; And (for example increase device 101 with described gas, the first supercharge pump 2 and the valve 3 that increase in device 101 with described gas are connected) and described stress loading device 102 is (for example, be connected with supercharge pump 25 and the first valve 24 in described stress loading device 102) connect, increase the opening and closing of device and described stress loading device for controlling described gas.
In order to provide confined pressure and axial compression to the core sample in sample pot better, this sample pot can be set to cavity closed at both ends, column.Meanwhile, for enough core sample amounts are provided, avoid the moisture in sample larger to tests affect, improve the representativeness of sample, the diameter of described sample pot for can 3.8 centimetres, length can be 10 centimetres.
As shown in Figure 4, this flow process comprises the flow process of above-mentioned rock core gas original position absorption proving installation work:
Step 401: described core sample is placed in described sample pot;
Step 402: described sample pot is placed in the described pressure-loaded device in described thermostatic box, and wherein, described pressure-loaded device is converted to for the pressure that described stress loading device is provided the confined pressure and the axial compression that provide to the core sample of described sample pot;
Step 403: adopt described gas to increase device and inject described test gas in described sample pot, and reach default test pressure value;
Step 404: obtain the pressure and temperature data of the described sample pot of described the first pressure unit collection, the pressure and temperature data of described sample pot, provide foundation for calculating described core sample to the isothermal adsorption amount of described test gas.
In order further to improve the accuracy of measurement data, in the present embodiment, in described thermostatic box, also comprise: three-way switch valve, the second pressure unit, with reference to tank, proving tank and the second valve, wherein, the gas access of described three-way switch valve is connected with the gas vent that described gas increases device, the gas vent of described three-way switch valve is connected with described sample pot, described the first pressure unit is connected on the pipeline between gas vent and the described sample pot of described three-way switch valve, the mouth of often outputing of described three-way switch valve is connected with the described gas access with reference to tank, the described gas vent with reference to tank is connected with one end of the second valve, the other end of described the second valve is connected with the gas access of proving tank, described the second pressure unit is connected to often outputing mouthful of described three-way switch valve and described with reference on the pipeline between the gas access of tank, described workflow also comprises: double to the described helium with reference to injecting preset pressure value in tank and described proving tank, wherein, in the time injecting helium for the second time, in described proving tank, be placed with the steel ball of known volume, gather according to described the second pressure unit, the described temperature and pressure data with reference to tank after twice injecting gas, calculate the described volume with reference to tank, the volume of described proving tank,
To the described inert gas with reference to injecting original pressure value in tank, described original pressure value is greater than described default test pressure value, if described during with reference to tank and described sample pot, described is described default test pressure value with reference to tank and the stable force value of described sample pot internal gas pressure,, according to described default test pressure value, described original pressure value and the described volume with reference to tank, calculate the inner space volume of described sample pot under described default test pressure value;
Adopt described gas increase device to described with reference to injecting described test gas in tank, and reach default test pressure value, described the second pressure unit gathers the described temperature and pressure data with reference to tank, be communicated with describedly with reference to tank and described sample pot, described the first pressure unit gathers the temperature and pressure data of described sample pot;
Gather the temperature and pressure data of described sample pot, described sample pot inner space volume and the described volume with reference to tank under described default test pressure value according to the described temperature and pressure data with reference to tank of described the second pressure unit collection, described the first pressure unit, calculate the isothermal adsorption amount of described core sample to described test gas.
The method of work of describing above-mentioned rock core gas original position absorption proving installation below in conjunction with specific embodiment in detail, the method comprises:
Step 1: preparation of samples.Prepare column coal petrography or shale sample, the diameter 2.5cm of general sample, length 5cm left and right, pack in sample pot 21 (or 15), stress loading device is offering sample confined pressure and the axial compression in sample pot 21 (or 15) by pressure-loaded device 22 (or 16) simultaneously.
Step 2: vacuumize.Valve-off 3, the four valve 8, the first valves 24; Control the first stifled card 204 of three-way switch valve 20 (or 14) gas access 201 and open, be communicated with gas access 201; Control the second stifled card 205 of three-way switch valve 20 (or 14) gas vent 202 in closing, cut off sample pot 21 (or 15).
Step 3: calculate with reference to tank and proving tank volume: control three-way switch valve 20 (or 14), inject the helium of 2MPa left and right extremely with reference to tank 18 (or 12), stablize after several minutes, the second pressure unit 17 (or 11) records temperature and pressure data, open the second valve 28 (or 29), UNICOM is with reference to tank 18 (or 12) and proving tank 19 (or 13), stablize after several minutes, the second pressure unit 17 (or 11) records temperature and pressure data, opening proving tank 19 (or 13) puts into after the steel ball of known volume, inject the helium of 2MPa left and right extremely with reference to tank 18 (or 12), stablize after several minutes, the second pressure unit 17 (or 11) records temperature and pressure data, open the second valve 28 (or 29), UNICOM is with reference to tank 18 (or 12) and proving tank 19 (or 13), stablize after several minutes, the second pressure unit 17 (or 11) records temperature and pressure data, gather according to described the second pressure unit, the described temperature and pressure data with reference to tank after twice injecting gas, calculate the described volume with reference to tank, the volume of described proving tank.
The isothermal adsorption experiment of the absorbing gas such as step 4:CH4, CO2 (being described test gas).Computer control the first supercharge pump 2 is to noting absorbing gas to adsorbing goal pressure (being described default test pressure value) with reference to tank 18 (or 12), stablize after several minutes, disconnect the first stifled card 204, and open second and block up card 205, connect with reference to tank with reference to tank 18 (or 12) and sample pot 21 (or 15), until absorption reaches balance, and the first pressure unit 23 (or 30) collecting temperature and pressure data.Repeating step 4 is proceeded next spot pressure adsorption experiment.
The plan isothermal adsorption test of the inert gases such as step 5:He.
A: computer control the first supercharge pump 2 to reference to tank 81 (or 12) inert gas injection to proofreading and correct original pressure (being set as 1.2 times of left and right of corresponding adsorption site pressure P 0), stablize after several minutes, the second pressure unit 17 (or 11) collecting temperature and pressure data, disconnect the first stifled card 204, and open second and block up card 205, connect with reference to tank 18 (or 12) and sample pot 21 (or 15), after stable number certain hour, the first pressure unit 23 (or 30) collecting temperature and pressure data acquisition correction equalized pressure.If the difference of correction of a final proof equalized pressure and P0 is not more than 0.1MPa, intend isothermal adsorption test and finish, otherwise:
Open valve the 36 and vacuum pump 7, to vacuumizing with reference to tank 18 (or 12) and sample pot 18 (or 15), then circulation A step, wherein new correction original pressure P1 '=P0*P1/P2, P0 is constant, the correction original pressure that P1 circulated last time, P2 is the correction equalized pressure of circulation last time.
Step 6: by step 3,4 pressure, the temperature that gather, integrating step 5 correction of a final proof equalized pressures, calculate the adsorbance of each spot pressure.
In the utility model is implemented, by place the core sample of test in sample pot, and sample pot is positioned in thermostatic box, for sample pot provides test required temperature, thermostatic box can provide the probe temperature of different range, increasing device by gas injects test gas in sample pot, and reach default test pressure value, can reach the test pressure requirement of different range, meanwhile, the pressure that pressure-loaded device provides stress loading device is converted to confession confined pressure and the axial compression proposed to the core sample in sample pot.Because utility model people finds in the prior art, test condition is only considered temperature, gaseous tension, this test condition (for example can not represent rock core gas, coal-seam gas and shale gas etc.) true adsorbed state in reservoir, therefore, pressure stress loading device being provided by pressure-loaded device is converted to confession confined pressure and the axial compression proposed to the core sample in sample pot, realize test condition and considered temperature, when gaseous tension, increase confined pressure and axial compression, make test condition (for example more approach rock core gas, coal-seam gas and shale gas etc.) true adsorbed state in reservoir, thereby improve the accuracy of the measurement result of rock core gas original position absorption test, it can be resource evaluation, individual well mining, numerical simulations etc. provide more reliable isothermal adsorption curve and data.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model embodiment can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a rock core gas original position absorption proving installation, is characterized in that, comprising:
Thermostatic box, for providing test required temperature, is provided with sample pot, the first pressure unit and pressure-loaded device in described thermostatic box, described thermostatic box is provided with gas outward increases device and stress loading device, wherein,
Described sample pot, for placing core sample to be tested;
The gas vent that described gas increases device is connected with described sample pot, and described gas increases device for inject test gas in described sample pot, and reaches default test pressure value;
Described the first pressure unit is connected to described gas and increases on the pipeline between gas vent and the described sample pot of device, and described the first pressure unit is used for gathering the pressure and temperature data of described sample pot;
The gas vent of described stress loading device is connected with described pressure-loaded device, and described stress loading device is for providing pressure to described pressure-loaded device;
Described pressure-loaded device is converted to for the pressure that described stress loading device is provided the confined pressure and the axial compression that provide to the core sample of described sample pot, and described sample pot is sleeved in described pressure-loaded device.
2. rock core gas original position is adsorbed proving installation as claimed in claim 1, it is characterized in that, described stress loading device comprises:
Silicone oil bottle;
Supercharge pump, the entrance of described supercharge pump is connected with described silicone oil bottle;
The first valve, one end of described the first valve is connected with described supercharging delivery side of pump, and the other end is the gas vent of described stress loading device, is connected with described pressure-loaded device.
3. rock core gas original position is adsorbed proving installation as claimed in claim 1, it is characterized in that, in described thermostatic box, also comprises:
Three-way switch valve, the second pressure unit, with reference to tank, proving tank and the second valve,
Wherein, the gas access of described three-way switch valve is connected with the gas vent that described gas increases device, the gas vent of described three-way switch valve is connected with described sample pot, described the first pressure unit is connected on the pipeline between gas vent and the described sample pot of described three-way switch valve, the mouth of often outputing of described three-way switch valve is connected with the described gas access with reference to tank, the described gas vent with reference to tank is connected with one end of the second valve, the other end of described the second valve is connected with the gas access of proving tank, described the second pressure unit is connected to often outputing mouthful of described three-way switch valve and described with reference on the pipeline between the gas access of tank,
Described the second pressure unit is used for gathering the described pressure and temperature data with reference to tank,
Described with reference to tank and described proving tank for injecting the gas of preset pressure value, for the volume and the inner space volume of described sample pot under described default test pressure value that calculate the described volume with reference to tank, described proving tank provide data.
4. rock core gas original position is adsorbed proving installation as claimed in claim 3, it is characterized in that, in described thermostatic box, also comprises:
Multiple described pressure-loaded devices, multiple described sample pot, multiple described the first pressure unit, multiple described the second pressure unit, multiple described three-way switch valve, multiple described with reference to tank, multiple described proving tank and multiple described the second valve, wherein
Each described sample pot is sleeved in a described pressure-loaded device, each described pressure-loaded device is connected with the gas vent of described stress loading device, each described sample pot is connected with the gas vent of a described three-way switch valve, the gas access of this described three-way switch valve is connected with the gas vent that described gas increases device, the mouth of often outputing of this described three-way switch valve is connected with a described gas access with reference to tank, this the described gas vent with reference to tank is connected with one end of described second valve, the other end of this described second valve is connected with the gas access of a described proving tank, each described the first pressure unit is connected on the pipeline between gas vent and a described sample pot of a described three-way switch valve, the gas that each described the second pressure unit is connected to a described three-way switch valve often output mouthful and one described with reference on the pipeline between the gas access of tank.
5. rock core gas original position is adsorbed proving installation as claimed in claim 3, it is characterized in that, also comprises:
Lifting table, is connected with the gas access end of described three-way switch valve, and described lifting table is for promoting or reducing described three-way switch valve, related described sample pot is lifted out to described thermostatic box or is reduced in described thermostatic box.
6. rock core gas original position is adsorbed proving installation as claimed in claim 3, it is characterized in that, also comprises:
The 3rd valve, described the 3rd one end of valve and the gas access of described three-way switch valve are connected;
Vacuum pump, is connected with the other end of described the 3rd valve, and described vacuum pump is for getting rid of described sample pot, described with reference to the air in tank and described proving tank.
7. rock core gas original position absorption proving installation as described in any one in claim 1 to 6, is characterized in that described sample pot cavity that be closed at both ends, column.
8. rock core gas original position absorption proving installation as claimed in claim 7, is characterized in that, the diameter of described sample pot is that 3.8 centimetres, length are 10 centimetres.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420275375.4U CN203929587U (en) | 2014-05-27 | 2014-05-27 | Rock core gas in-situ adsorption testing device |
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| CN201420275375.4U CN203929587U (en) | 2014-05-27 | 2014-05-27 | Rock core gas in-situ adsorption testing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983552A (en) * | 2014-05-27 | 2014-08-13 | 中国石油天然气股份有限公司 | rock core gas in-situ adsorption testing device and working method thereof |
| CN112485175A (en) * | 2020-11-12 | 2021-03-12 | 武汉古生代检测科技有限公司 | Rock porosity measuring method and measuring device |
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2014
- 2014-05-27 CN CN201420275375.4U patent/CN203929587U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983552A (en) * | 2014-05-27 | 2014-08-13 | 中国石油天然气股份有限公司 | rock core gas in-situ adsorption testing device and working method thereof |
| CN112485175A (en) * | 2020-11-12 | 2021-03-12 | 武汉古生代检测科技有限公司 | Rock porosity measuring method and measuring device |
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