CN202033252U - Simulation test system for fracture system development in coal metamorphism - Google Patents
Simulation test system for fracture system development in coal metamorphism Download PDFInfo
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- CN202033252U CN202033252U CN2011201116365U CN201120111636U CN202033252U CN 202033252 U CN202033252 U CN 202033252U CN 2011201116365 U CN2011201116365 U CN 2011201116365U CN 201120111636 U CN201120111636 U CN 201120111636U CN 202033252 U CN202033252 U CN 202033252U
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Abstract
The utility model discloses a simulation test system for fracture system development in coal metamorphism, which comprises a power loading system, a coal rock fracture generation simulation system and a data display system, wherein the power loading system comprises a pneumatic device and a hydraulic device, the coal rock fracture generation simulation system comprises an endogenetic fracture generation simulation system and an exogenetic fracture generation simulation system, a confining pressure device is arranged inside each of the endogenetic fracture generation simulation system and the exogenetic fracture generation simulation system respectively, and the data display system comprises a sensing device and a data display device. The simulation test system has a simple structure, is convenient to use, can simulate the formation process of endogenetic fractures and exogenetic fractures during metamorphism of coal in different temperature and pressure conditions, can test permeability under different change degree and different pressure conditions, achieves quantization of fracture development systems, and provides guidance for correct selection and type selection in economic evaluation systems and development processes of coal-bed gases.
Description
Technical field
The utility model relates to the coal-seam gas applied technical field, and especially a kind of coal metamorphism evolution fissure system is grown simulated testing system.
Background technology
Coal seam reservoirs is a kind of novel cleaning, the energy of cleaning.Based on mine safety and energy utilization angle, coal in China department, oil sector, Ministry of Geology and Mineral Resources's door, local government, priority such as coal-seam gas company nearly 5000 mouthfuls of coal bed gas wells (ending for the end of the year 2010) of having constructed in 42 coal provinces of China both at home and abroad.But except that having realized the local commercial development that most of regional cbm development test findings are unsatisfactory in minority areas such as the southeast, basin, Qinshui, Shanxi, Liaoning iron processes, coalfield, the east of a river, Shanxi.
Can coal-seam gas realize two aspects that how much depend primarily on of output and quantum of output, the one, and have and do not have enough coal bed gas resources; Then be to have not have enough unimpeded passage and energy system to make coal-seam gas be able to change free state and output into from adsorbed state on the other hand, Neither of the two can be dispensed.(promptly the coal body that causes owing to external force such as tectonic stresses in the process on the turn is out of shape the crack of growing out for cleat (promptly in the process because the coal cleat that the variation of coal body itself causes) on the turn and external crack.) which is bigger to the contribution of coal-seam gas output is the problem that the coal seam aerosphere has controversial always.And the contribution in cleat and external crack has the directive significance of directivity to a certain extent to selection, exploiting economy evaluation, potentiality to be exploited evaluation, the Development Engineering technology of exploitation target area.Not reproducibility, coal cleat and the external crack that the complicacy of China's coal-forming environment, tectogenetic property of many phases, coal metamorphism the develop limitation of means of testing separately all causes present not scientific, one-sidedness to a certain block development evaluation; Be used for instructing the development technology technology in later stage, more suitable in some local certain technology, find but that similarly regional same technology almost is unaccommodated, is easy to cause the huge waste of human and material resources, financial resources in the practice.Simultaneously, people catch a packet again and again to the enthusiasm of cbm development, and the error that wherein the most important thing is directivity is that we can not bear the weight.Coal is in the coal-forming process, experienced different temperature behind the coal-forming, effect such as pressure and tectonic stress, different buried depth, coal rock deformation is different with metamorphic grade under the different geology dynamic actions, therefore, need a kind of device of development badly, the coal sample that can utilize different regions in the coal metamorphism evolutionary process because temperature, pressure change cleat that the metamorphic process cause coal forms and since the external crack that the external force effect causes simulate, so that find out different temperatures, pressure, the development degree in coal seam reservoirs crack under the tectonic movement is in the hope of being present coal-seam gas economic evaluation system, the development technology choice of technology provides a kind of improved thinking and means; But do not occur coal metamorphism evolution fissure system at present and grow simulated testing system.
The utility model content
The purpose of this utility model is to provide a kind of coal metamorphism evolution fissure system to grow simulated testing system, which is bigger to the contribution of coal-seam gas output to be used for the cleat of the different coal samples of simulation test and external crack, finds out the development degree in coal seam reservoirs crack under different temperatures, pressure, the tectonic movement.
For achieving the above object, coal metamorphism evolution fissure system growth simulated testing system of the present utility model comprises that power loading system, coal petrography crack generate simulation system and data presentation system; (1) the power loading system comprises pneumatic shuttle and hydraulic devices; Described pneumatic shuttle comprises high-pressure nitrogen bottle, methane gas cylinder, dioxide bottle and the helium tank that high-pressure pump and the escape pipe by separately are connected with the air intake opening of described high-pressure pump, be respectively equipped with valve, tensimeter and flowmeter on the escape pipe of described high-pressure nitrogen bottle, methane gas cylinder, dioxide bottle and helium tank, the gas outlet of described high-pressure pump generates simulation system by snorkel and described coal petrography crack and is connected; Described hydraulic devices comprises water tank and water pump, and the water inlet of described water pump is connected with described water tank, and the water delivering orifice of described water pump generates simulation system by water service pipe and described coal petrography crack and is connected; (2) generation simulation system in coal petrography crack comprises that the cleat generates simulation system and external crack generates simulation system, is equipped with one in described cleat generation simulation system and the external crack generation simulation system and overlaps confining pressure device; (2.1) described confining pressure device comprises the confined pressure cylinder, is set in sample cylinder and net sheet in the confined pressure cylinder; Described confined pressure cylinder and sample cylinder around and all airtight setting in bottom, the top is provided with opening; Described net sheet in described sample cylinder coal sample each side establish a slice; The both sides, top of described confined pressure cylinder are respectively equipped with interface, and described interface is connected with described snorkel; Described sample cylinder is respectively equipped with water inlet in the middle part of its left and right sidewall; The described confined pressure cylinder of described water service pipe hermetically passing also is connected with described water inlet; Described confined pressure cylinder is connected with described water pump by water service pipe, and the water service pipe before the described confined pressure cylinder is provided with valve, tensimeter and flowmeter; (2.2) described cleat generation simulation system comprises heating arrangement, interior living pressue device and a cover confining pressure device; Giving birth to pressue device in described comprises and axially adds carrier aircraft; The described open top that axially adds bottom shape that carrier aircraft is hydraulic means and its live end and described sample cylinder is suitable; Described confined pressure cylinder and described sample cylinder all are located on the described heating arrangement; (2.3) described external crack generation simulation system comprises external pressue device and the described confining pressure device of a cover; External pressue device comprises the above hydraulic means of two covers, and the live end of described each hydraulic means is pressured column, and described each pressured column is close to the formation pressures partially side by side, and the bottom shape of pressures partially and the open top of described sample cylinder are suitable; Described sample cylinder bottom is provided with spring, is equipped with the isolated film of high strength and high flexibility on the spring; (3) data presentation system is with comprising sensing device and data presentation device, described sensing device comprises pressure transducer and temperature sensor, described sensing device is arranged on the sample cylinder that described cleat generates simulation system and described external crack generates on the sample cylinder of simulation system, and described pressure transducer all is connected with described data presentation device with described temperature sensor.
Described heating arrangement comprises that heating arrangement comprises well heater and temperature regulator, and described confined pressure cylinder and described sample cylinder all are located on the described well heater.
Described data presentation device is a multi-purpose computer.
The utlity model has following advantage:
1. the utility model is simple in structure, easy to use, can simulate coal forming process in cleat and external crack in the rotten evolutionary process under different temperatures, pressure condition, and the permeability under different intensity of variations, the different pressures condition tested, the crack development system is carried out quantification, for coal-seam gas economic evaluation system, the correct selection of development technology, type selecting provide guidance.
2. heating arrangement comprises well heater and temperature regulator, is convenient to by the temperature regulator control heater to keep the temperature of coal sample.
3. data presentation device is a multi-purpose computer, is convenient to show and record test data, also is convenient to expand control function.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the a-a cut-open view of Fig. 1;
Fig. 3 is the structure for amplifying synoptic diagram of confined pressure cylinder among Fig. 1.
Embodiment
As Fig. 1, Fig. 2 and shown in Figure 3, coal metamorphism evolution fissure system of the present utility model is grown simulated testing system and is comprised that power loading system 28, coal petrography crack generate simulation system 27 and data presentation system 26.The power charger mainly is power to be provided and to provide power to the flow rate test that generates the fissure system development degree for the generation in cleat and external crack in the coal metamorphism process and development degree.It is for the distortion of coal under more true reappearance different depth, different temperatures, the different confined pressure and the rotten cleat that causes and external cranny development degree, development condition that the coal petrography crack generates simulation system 27.
(1) power loading system
Described pneumatic shuttle comprises high-pressure nitrogen bottle 7, methane gas cylinder 15, dioxide bottle 24 and the helium tank 23 that high-pressure pump 5 and the escape pipe 9 by separately are connected with the air intake opening of described high-pressure pump 5, be respectively equipped with valve 3, tensimeter 4 and flowmeter 17 on the escape pipe 9 of described high-pressure nitrogen bottle 7, methane gas cylinder 15, dioxide bottle 24 and helium tank 23, the gas outlet of described high-pressure pump 5 is high-pressure hoses circular, diameter 10 mm by snorkel 35(snorkel 35) be connected with described coal petrography crack generation simulation system 27.
Described hydraulic devices comprises water tank 1 and water pump 6, the water inlet of described water pump 6 is connected with described water tank 1, and the water delivering orifice of described water pump 6 is high-pressure hoses circular, diameter 10 mm by water service pipe 36(water service pipe 36) be connected with described coal petrography crack generation simulation system 27.
By being connected communicating pipe 61, communicating pipe 61 is provided with valve 3 between the gas outlet of the water delivering orifice of water pump 6 and high-pressure pump 5.The effect of communicating pipe 61 and valve 3 is to make water service pipe 36 or snorkel 35 generate simulation system 27 to the coal petrography crack separately to carry out gas phase pressurization, water pressurization or the pressurization of air water two-phase.
(2) the coal petrography crack generates simulation system
The coal petrography crack generates simulation system 27 and comprises that the cleat generates simulation system and external crack generates simulation system, and described cleat generates in simulation system and the external crack generation simulation system and is equipped with a cover confining pressure device.
(2.1) described confining pressure device comprises confined pressure cylinder 8, the sample cylinder 11(confined pressure cylinder 8 and the sample cylinders 11 that are set in the confined pressure cylinder 8 all are welded by cuboidal steel plate) and net sheet 10(net sheet 10 be iron net sheet, be used to prevent that when carrying out the permeability test forced air from directly impacting at the position in coal sample 37 no cracks causes the permeability test result to be failed or distortion, its width is consistent with the width of sample cylinder 11, its highly be sample cylinder 11 height 2/3); Described confined pressure cylinder 8 and sample cylinder 11 around and all airtight setting in bottom, the top is provided with opening; Described net sheet 10 in described sample cylinder 11 coal sample 37 each side establish a slice; The both sides, top of described confined pressure cylinder 8 are welded respectively and are provided with steel interface 18, and described interface 18 is connected with described snorkel 35; Described sample cylinder 11 welds respectively in the middle part of its left and right sidewall and is provided with steel water inlet (being steel joint) 38; The described confined pressure cylinder 8 of described water service pipe 36 hermetically passings also is connected with described water inlet (steel joint) 38 and (O-ring seal preferably is set to strengthen sealing effectiveness between the casing wall of water service pipe 36 and confined pressure cylinder 8.Utilize rubber ring to be sealed into prior art, the rubber loop graph does not show.For making accompanying drawing for purpose of brevity, the right side water inlet is that the water service pipe 36 at steel joint 38 places does not all draw among the figure); Described confined pressure cylinder 8 is connected with described water pump 6 by water service pipe 36, is respectively equipped with valve 3, tensimeter 4 and flowmeter 17 on water service pipe 36 before the described confined pressure cylinder 8 and the snorkel 35.
(2.2) described cleat generates the cleat development condition that simulation system is used for simulating the coal of different metamorphic grade, comprises heating arrangement, interior living pressue device and a cover confining pressure device.
Giving birth to pressue device in described comprises and axially adds carrier aircraft 14; The described carrier aircraft 14 of axially adding is " protruding " font for the cross section of hydraulic means and its live end 14A, and the bottom shape of " protruding " font live end 14A and the open top of described sample cylinder 11 are suitable and be used for the entire top of coal sample 37 is carried out pressurized operation.
Described heating arrangement comprises well heater 13 and temperature regulator 42, and described confined pressure cylinder 8 and described sample cylinder 11 all are located on the described well heater 13; Well heater 13 is used to heat coal sample 37, and temperature regulator 42 is used for control heater 13 to keep the temperature of coal sample 37.
(2.3) described external crack generation simulation system comprises external pressue device and the described confining pressure device of a cover.
Described external pressue device comprises that the certain pressue device of three cover hydraulic means 39(also can be provided with two covers or the above hydraulic means 39 of quadruplet), the live end of three cover hydraulic means 39 is pressured column 16, described three pressured columns 16 are close to the formation pressures partially side by side, and the open top of the sample cylinder 11 of the bottom shape of pressures partially and described external crack generation simulation system is suitable;
The bottom that described external crack generates the sample cylinder 11 of simulation system is provided with spring 12, is equipped with the isolated film 41 of high strength and high flexibility on the spring 12, and coal sample 37 is placed on the film 41 during simulation test, makes film 41 play the effect of spacer spring 12 and coal sample 37.
(3) data presentation system
The course of work that coal metamorphism evolution fissure system of the present utility model is grown simulated testing system is:
(1) sample collecting preparation
Select that metamorphic grade is low, the area of relative mitigation with tectonic movement behind coal-forming during coal-forming, collection brown coal coal sample 37.On rock drill, stone sawing machine and stone mill, be made into the cube coal sample 37 of 10cm * 10 cm * 10 cm.
(2) original permeability test, calculating
The coal sample 37 product sample cylinder 11 of packing into, connect snorkel 35, each flowmeter 17 is linked together with Computer signal, after the impermeability of testing fixture, required according to experiment, open the valve 3 on the gas cylinder gas outlet of desired gas (helium or methane or carbon dioxide or nitrogen), start high-pressure pump 5, be added to required confined pressure to simulate different reservoir pressures, test is also calculated the original permeability of brown coal.
(3) confined pressure is set
According to experiment required by control high-pressure pump 5 and water pump 6 regulate gas, water ratio (can carry out the pressurization of single gas phase or single water, also can gas, the water two-phase pressurizes; When gas, the pressurization of water two-phase, according to required adjustment gaseous pressure of experiment and water pressure), confined pressure is set to predetermined pressure (simulating the different reservoir pressures and gas, the water environment of different reservoir).
(4) cleat generates simulation
Required according to experiment, the temperature and time of adjusting well heater 13 heats coal body; In heating process, axially add carrier aircraft 14 and also will load.Well heater 13 high energy are heated to 800 ℃ with coal sample 37 temperature, the temperature of well heater 13 is by temperature regulator 42 controls, configure the experiment temperature required after, temperature regulator 42 is automatic heater 13 when temperature is lower than design temperature, automatically close well heater 13 when being higher than design temperature, thereby coal sample 37 is remained in the stationary temperature scope.After the heating, coal sample 37 inside change, and produce the cleat.
(5) carry out the permeability test after the cleat generates, calculate the line data collection of going forward side by side
Pneumatic shuttle is connected with the sample cylinder 11 of confining pressure device by snorkel 35, open the valve 3 on the gas cylinder gas outlet of desired gas (helium or methane or carbon dioxide or nitrogen), starting high-pressure pump 5 pressurizes, pressure reduction after the simulation of test cleat generates, flow etc., in time collect pressure, fluctuations in discharge by computing machine in the experimentation, gather the various data in the pressure process, and be data file data recording.Take out coal sample 37, width, height and the length of test coal sample 37 are tested, are calculated the permeability after the generation of cleat.
(6) external crack generates simulation and data acquisition
Place the coal sample 37 of taking out external crack to generate in the sample cylinder 11 of simulation system,, confined pressure is set to predetermined pressure regulating gas, water ratio as required.Start three cover hydraulic means 39, carry out different pressures by 16 pairs of coal sample 37 different pieces of three pressured columns and load, make coal body produce different displacements in zones of different, thus the external crack that simulation is produced by tectonic structure.In time collect pressure, fluctuations in discharge by computing machine in the experimentation, gather the various data in the pressure process, and be data file, finish external crack and generate simulation data recording.
(7) external crack generates back permeability test, calculates
Pneumatic shuttle is connected with the sample cylinder 11 of confining pressure device by snorkel 35, open the valve 3 on the gas cylinder gas outlet of desired gas (helium or methane or carbon dioxide or nitrogen), startup high-pressure pump 5 pressurizes and simulates different reservoir pressures, test pressure reduction after the simulation of external crack, flow etc., take out coal sample 37, width, height and the length of test coal sample 37 are tested, are calculated the permeability after the generation of external crack.
(8) data processing
According to the various data of collecting, make the graph of a relation of pressure reduction and temperature, gas, discharge and permeability under the different confined pressures.
(9) coupling analysis
The relation of pressure reduction and temperature, gas, discharge and permeability under the different confined pressures of coupling analysis, draw the contribution of the cleat of different distortion degree, rank coal and external crack to gas, discharge, for coal-seam gas economic evaluation system, the development technology choice of technology provide improved thinking and selection approach, avoid selected development technology to be not suitable for the huge waste that local ature of coal is brought.
Claims (3)
1. coal metamorphism evolution fissure system is grown simulated testing system, it is characterized in that: comprise that power loading system, coal petrography crack generate simulation system and data presentation system;
(1) the power loading system comprises pneumatic shuttle and hydraulic devices;
Described pneumatic shuttle comprises high-pressure nitrogen bottle, methane gas cylinder, dioxide bottle and the helium tank that high-pressure pump and the escape pipe by separately are connected with the air intake opening of described high-pressure pump, be respectively equipped with valve, tensimeter and flowmeter on the escape pipe of described high-pressure nitrogen bottle, methane gas cylinder, dioxide bottle and helium tank, the gas outlet of described high-pressure pump generates simulation system by snorkel and described coal petrography crack and is connected;
Described hydraulic devices comprises water tank and water pump, and the water inlet of described water pump is connected with described water tank, and the water delivering orifice of described water pump generates simulation system by water service pipe and described coal petrography crack and is connected;
(2) generation simulation system in coal petrography crack comprises that the cleat generates simulation system and external crack generates simulation system, is equipped with one in described cleat generation simulation system and the external crack generation simulation system and overlaps confining pressure device;
(2.1) described confining pressure device comprises the confined pressure cylinder, is set in sample cylinder and net sheet in the confined pressure cylinder; Described confined pressure cylinder and sample cylinder around and all airtight setting in bottom, the top is provided with opening; Described net sheet in described sample cylinder coal sample each side establish a slice; The both sides, top of described confined pressure cylinder are respectively equipped with interface, and described interface is connected with described snorkel; Described sample cylinder is respectively equipped with water inlet in the middle part of its left and right sidewall; The described confined pressure cylinder of described water service pipe hermetically passing also is connected with described water inlet; Described confined pressure cylinder is connected with described water pump by water service pipe, and the water service pipe before the described confined pressure cylinder is provided with valve, tensimeter and flowmeter;
(2.2) described cleat generation simulation system comprises heating arrangement, interior living pressue device and a cover confining pressure device;
Giving birth to pressue device in described comprises and axially adds carrier aircraft; The described open top that axially adds bottom shape that carrier aircraft is hydraulic means and its live end and described sample cylinder is suitable;
Described confined pressure cylinder and described sample cylinder all are located on the described heating arrangement;
(2.3) described external crack generation simulation system comprises external pressue device and the described confining pressure device of a cover;
External pressue device comprises the above hydraulic means of two covers, and the live end of described each hydraulic means is pressured column, and described each pressured column is close to the formation pressures partially side by side, and the bottom shape of pressures partially and the open top of described sample cylinder are suitable;
Described sample cylinder bottom is provided with spring, is equipped with the isolated film of high strength and high flexibility on the spring;
(3) data presentation system is with comprising sensing device and data presentation device, described sensing device comprises pressure transducer and temperature sensor, described sensing device is arranged on the sample cylinder that described cleat generates simulation system and described external crack generates on the sample cylinder of simulation system, and described pressure transducer all is connected with described data presentation device with described temperature sensor.
2. coal metamorphism evolution fissure system according to claim 1 is grown simulated testing system, and it is characterized in that: described heating arrangement comprises that heating arrangement comprises well heater and temperature regulator, and described confined pressure cylinder and described sample cylinder all are located on the described well heater.
3. coal metamorphism evolution fissure system according to claim 1 and 2 is grown simulated testing system, and it is characterized in that: described data presentation device is a multi-purpose computer.
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| CN102279420A (en) * | 2011-04-15 | 2011-12-14 | 河南理工大学 | Development simulation test system of coal metamorphism evolution fissure system |
| CN103048431A (en) * | 2013-01-22 | 2013-04-17 | 河南理工大学 | Hydrofracture propping agent settlement and permeability testing device |
| CN103323363A (en) * | 2013-06-08 | 2013-09-25 | 河南理工大学 | Reaction rate testing apparatus of carbon dioxide and main mineral matters in the coal |
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2011
- 2011-04-15 CN CN2011201116365U patent/CN202033252U/en not_active Expired - Lifetime
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| CN102279420A (en) * | 2011-04-15 | 2011-12-14 | 河南理工大学 | Development simulation test system of coal metamorphism evolution fissure system |
| CN102279420B (en) * | 2011-04-15 | 2013-03-13 | 河南理工大学 | Development simulation test system of coal metamorphic evolution fissure system |
| CN103048431A (en) * | 2013-01-22 | 2013-04-17 | 河南理工大学 | Hydrofracture propping agent settlement and permeability testing device |
| CN103323363A (en) * | 2013-06-08 | 2013-09-25 | 河南理工大学 | Reaction rate testing apparatus of carbon dioxide and main mineral matters in the coal |
| CN103323363B (en) * | 2013-06-08 | 2015-04-08 | 河南理工大学 | Reaction rate testing apparatus of carbon dioxide and main mineral matters in the coal |
| CN105115824A (en) * | 2015-09-18 | 2015-12-02 | 河南理工大学 | Rock confining pressure loading and unloading testing device |
| CN105115824B (en) * | 2015-09-18 | 2018-11-16 | 河南理工大学 | A kind of rock confining pressure adds unloading test device |
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| CN105842280A (en) * | 2016-03-26 | 2016-08-10 | 河南理工大学 | Coal oxidization temperature increase characteristic parameter measurement apparatus for compressed coal mass |
| CN105842280B (en) * | 2016-03-26 | 2018-07-24 | 河南理工大学 | Compression coal body oxidation of coal temperature-raising characteristic parametric measurement device |
| WO2019042407A1 (en) * | 2017-09-01 | 2019-03-07 | 王美兰 | Test equipment |
| CN112362487A (en) * | 2020-11-30 | 2021-02-12 | 湖北科技学院 | Rock-soil compression test method |
| CN112362487B (en) * | 2020-11-30 | 2023-08-25 | 湖北科技学院 | Rock-soil compression test method |
| CN113702440A (en) * | 2021-09-13 | 2021-11-26 | 南京大学 | Method for monitoring growth state of internal cracks of soil body |
| CN114527255A (en) * | 2022-02-18 | 2022-05-24 | 中国矿业大学 | Method for quantitatively evaluating element mobility in coal in high-temperature simulation process |
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