CN204024612U - A kind of multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting - Google Patents
A kind of multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting Download PDFInfo
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- CN204024612U CN204024612U CN201420276793.5U CN201420276793U CN204024612U CN 204024612 U CN204024612 U CN 204024612U CN 201420276793 U CN201420276793 U CN 201420276793U CN 204024612 U CN204024612 U CN 204024612U
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Abstract
The utility model discloses a kind of multiple seam and close the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, comprise recovery system, recovery system is connected to pit shaft analogue means top, reservoir simulation system is connected with the guide hole in pit shaft analogue means, adjustment System be connected to pit shaft analogue means outside with bottom for controlling the inclination of pit shaft analogue means, data collecting system is connected to recovery system, the junction that pit shaft analogue means and reservoir simulation system are mutual, the utility model can be simulated in certain pit shaft length, under the conditions such as hole angle, after drainage and step-down, multiple coal seams desorb successively under original reservoir conditions, and annular space and this physical process of oil pipe output of process coal bed gas pit shaft, simultaneously by adjusting displacement, casing pressure, record analysis stream are pressed, gas production data, the coal bed gas pit shaft biphase gas and liquid flow feature of qualitative understanding commingling production, draw the mining working system of optimization, for the formulation of on-the-spot coal bed gas well mining working system provides guidance instruction.
Description
Technical field
The utility model relates to a kind of multiple seam and closes the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, and belongs to coal bed gas extraction technical field.
Background technology
Due to China's bed gas reservoir ubiquity low pressure, hypotonic and low gas content saturation ratio, the therefore situation of low, the deficiency in economic performance of coal bed gas well exploitation ubiquity well yield.If only adopt formation water in pump drainage coal seam to reduce the method for coal seam pressure, the methane gas adsorbing in coal seam is discharged, and do not take any well stimulation, not only can make coal bed gas well yield lower, and cbm development well will lose the value of exploitation.
In order to improve coal bed gas well yield, obtain considerable economic benefit, must take some new well stimulations.The most widely used reservoir enhancements of current domestic cbm development is still fracture technology, this technology is carried out pressure break mainly for single high seam or multilayer coal seam, result shows to compare the coal bed gas well of individual layer exploitation, the gas production of commingling production coal bed gas well does not have clear superiority, this be mainly because once some:
1, between the coal seam of commingling production coal bed gas well because of reservoir pressure, coal rank, the isoparametric difference of air content, cause in biphase gas and liquid flow stage interference phenomenon between genetic horizon often.
2, the current domestic coal bed gas well working system of still indiscriminately imitating individual layer seam mining, instructs commingling production coal bed gas well working system.
To sum up, need the mining working system of research for commingling production coal bed gas well badly.
Utility model content
The purpose of this utility model is: a kind of multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, it can be simulated in certain pit shaft length, under the conditions such as hole angle, after drainage and step-down, multiple coal seams desorb successively under original reservoir conditions, and annular space and this physical process of oil pipe output of process coal bed gas pit shaft, simultaneously by adjusting displacement, casing pressure, record analysis stream are pressed, gas production data, the coal bed gas pit shaft biphase gas and liquid flow feature of qualitative understanding commingling production, draw the maximized mining working system of gas production, for the formulation of on-the-spot coal bed gas well mining working system provides guidance instruction, thereby overcome the deficiencies in the prior art.
The technical solution of the utility model
A kind of multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, comprise recovery system, recovery system is connected to pit shaft analogue means top, reservoir simulation system is connected with the guide hole in pit shaft analogue means, adjustment System be connected to pit shaft analogue means outside with bottom for controlling the inclination of pit shaft analogue means, data collecting system is connected to the mutual junction of recovery system, pit shaft analogue means and reservoir simulation system, wherein data collecting system, for completing parameter detecting, collection and arrangement.
Aforesaid multiple seam is closed in the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, this pit shaft analogue means connects shape with transparent glass tube group and the main body frame that forms, establish Packed plug in transparent glass tube bottom, in transparent glass tube, be provided with successively from bottom to up the screen casing coaxial with transparent glass tube and PE pipe, in annular space between screen casing and transparent glass tube, be provided with quartz sand, be provided with screw thread lid in transparent glass tube upper end, be provided with trepanning at screw thread tops, PE pipe top is connected with screw thread lid, be respectively equipped with submersible pump and electronic pressure gauge one in PE pipe bottom, guide hole is arranged on screen casing and PE pipe intersection and the transparent glass tube with upper/lower positions, pressure gauge two and water injecting pump are separately positioned on transparent glass tube right upper portion and middle part, this pit shaft simulation apparatus structure is the different internal structure of multiple seam in simulating reality effectively, Liquid Flow passage and parameter measurement port are provided.
Aforesaid multiple seam is closed in the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, this reservoir simulation system is taking three axle adsorption-desorption instrument as core, the coal sample absorption of carrying out successively under original reservoir pressure condition is conciliate, be provided with gas import at three axle adsorption-desorption instrument tops, oil pressure import, be provided with gas export and confined pressure entrance in three axle adsorption-desorption instrument bottoms, be provided with an external pipeline in three axle adsorption-desorption instrument middle-end outsides, be provided with gate valve at extension tube attached line middle end of upper section, be provided with gas-liquid separator on gate valve right side, the outlet of lid gas-liquid separator is divided into gas pipeline and water pipeline, on gas pipeline and water pipeline, be separately installed with gas flowmeter and fluid flowmeter, this gas import is connected by pipeline with natural gas bottle group, this oil pressure import is connected by pipeline with hand-driven oil hydraulic pump, this gas export connects the tank with graduated cylinder by pipeline, this confined pressure entrance connects manual water press pump by pipeline, this reservoir simulation system provides the saturated coal bed gas coal sample under original reservoir conditions, aerogenesis pressure and the production fluid pressure in each single coal seam in observation mining process, and for interference phenomenon between observation layer.
Aforesaid multiple seam is closed in the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, and this recovery system comprises gas tank and pond, between gas tank and pit shaft analogue means, is provided with drain discharge meter.
Aforesaid multiple seam is closed in the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, the main body pedestal of this adjustment System is structure of right angle tyoe, horizontal pedestal and vertical pedestal in adjustment System are equipped with slide block slot, on slide block slot two sides, be provided with fixing hole, this adjustment System meets real coal bed texture feature for hole angle, the well depth of adjusting pit shaft simulation system more to guarantee pit shaft simulation system.
Owing to adopting technique scheme, compared with prior art, the utility model has been filled up the technological gap in biphase gas and liquid flow physical analogy field in commingling production coal bed gas pit shaft, a kind of coal bed gas pit shaft biphase gas and liquid flow analogue means of commingling production is proposed, it can be simulated in certain pit shaft length, under the conditions such as hole angle, after drainage and step-down, multiple coal seams desorb successively under original reservoir conditions, and annular space and this physical process of oil pipe output of process coal bed gas pit shaft, simultaneously by adjusting displacement, casing pressure, record analysis stream are pressed, gas production data, the coal bed gas pit shaft biphase gas and liquid flow feature of qualitative understanding commingling production, draw the maximized mining working system of gas production, for the formulation of on-the-spot coal bed gas well mining working system provides guidance instruction, in addition can also be by recording and analyze the gas production of each individual layer, the data such as production fluid amount, analyze the affect situation of interlayer interference for gas production, and formulate effective working system and avoid or weaken interlayer interference.
Brief description of the drawings
Accompanying drawing 1 is the utility model apparatus structure schematic diagram;
Accompanying drawing 2 is the structural representation of pit shaft simulation system in the utility model device;
Accompanying drawing 3 is the amplifier section schematic diagram of F in accompanying drawing 2;
Accompanying drawing 4 is the structural representation of reservoir simulation system in the utility model device;
Accompanying drawing 5 is the structural representation of adjustment System in the utility model device;
Accompanying drawing 6 is that the main body pedestal of adjustment System in the utility model is structure of right angle tyoe.
Being labeled as in accompanying drawing: 1-recovery system, 2-pit shaft analogue means, 3-reservoir simulation system, 4-adjustment System, 5-data collecting system, 6-guide hole, 7-transparent glass tube, 8-plug, 9-screen casing, 10-PE pipe, 11-quartz sand, 12-screw thread lid, 13-trepanning, 14-submersible pump, 15-electronic pressure gauge one, 16-pressure gauge two, 17-water injecting pump, 18-tri-axle adsorption-desorption instrument, the import of 19-gas, the import of 20-oil pressure, 21-gas export, 22-confined pressure entrance, the external pipeline of 23-, 24-gate valve, 25-gas-liquid separator, 26-gas pipeline, 27-water pipeline, 28-gas flowmeter, 29-fluid flowmeter, 30-natural gas bottle group, 31-hand-driven oil hydraulic pump, 32-is with the tank of graduated cylinder, 33-manual water press pump, 34-gas tank, 35-pond, 36-drain discharge meter, 37-slide block slot, 38-fixing hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail, but not as to any restriction of the present utility model.
Embodiment of the present utility model: a kind of multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, as shown in Figure 1, comprise recovery system 1, recovery system 1 is connected to pit shaft analogue means 2 tops, reservoir simulation system 3 is connected with the guide hole 6 in pit shaft analogue means 2, adjustment System 4 is connected to pit shaft analogue means 2 outsides and bottom for controlling the inclination of pit shaft analogue means 2, data collecting system 5 is connected to recovery system 1, the junction that pit shaft analogue means 2 and reservoir simulation system 3 are mutual, wherein pit shaft simulation system 2 can provide biphase gas and liquid flow pit shaft simulation system channel and parameter measurement port, data collecting system 5 is for completing parameter detecting, collect and arrange, reservoir simulation system 3 can provide the saturated coal bed gas coal sample under original reservoir conditions, for observing aerogenesis pressure and the production fluid pressure in the each single coal seam of mining process, recovery system 1 is for reclaiming the coal seam G&W of output, adjustment System 4 is for adjusting the hole angle of pit shaft simulation system, well depth.
As shown in Figures 2 and 3, this pit shaft analogue means 2 is with 7 groups of main body frames that connect shape and form of transparent glass tube, establish Packed plug 8 in transparent glass tube 7 bottoms, in transparent glass tube 7, be provided with successively from bottom to up the screen casing 9 coaxial with transparent glass tube 7 and PE pipe 10, in annular space between screen casing 9 and transparent glass tube 7, be provided with quartz sand 11, be provided with screw thread lid 12 in transparent glass tube 7 upper ends, be provided with trepanning 13 at screw thread lid 12 tops, PE manages 10 tops and is connected with screw thread lid 12, manage 10 bottoms at PE and be respectively equipped with submersible pump 14 and electronic pressure gauge 1, guide hole 6 is arranged on screen casing 9 and PE manages on 10 intersections and the transparent glass tube 7 with upper/lower positions, pressure gauge 2 16 and water injecting pump 17 are separately positioned on transparent glass tube 7 right upper portion and middle part.
As shown in Figure 4, this reservoir simulation system 3 is taking three axle adsorption-desorption instrument 18 as core, the coal sample absorption of carrying out successively under original reservoir pressure condition is conciliate, be provided with gas import 19 at three axle adsorption-desorption instrument 18 tops, oil pressure import 20, be provided with gas export 21 and confined pressure entrance 22 in three axle adsorption-desorption instrument 18 bottoms, be provided with an external pipeline 23 in three axle adsorption-desorption instrument 18 middle-end outsides, be provided with gate valve 24 at extension tube attached line 23 middle end of upper section, be provided with gas-liquid separator 25 on gate valve 24 right sides, these gas-liquid separator 25 outlets are divided into gas pipeline 26 and water pipeline 27, on gas pipeline 26 and water pipeline 27, be separately installed with gas flowmeter 28 and fluid flowmeter 29, this gas import 19 is connected by pipeline with natural gas bottle group 30, this oil pressure import 20 is connected by pipeline with hand-driven oil hydraulic pump 31, this gas export 21 connects the tank 32 with graduated cylinder by pipeline, this confined pressure entrance 22 connects manual water press pump 33 by pipeline.
As shown in Figure 5, this recovery system 1 comprises gas tank 34 and pond 35, between gas tank 34 and pit shaft analogue means 2, is provided with drain discharge meter 36.
As shown in Figure 6, the main body pedestal of this adjustment System 4 is structure of right angle tyoe, horizontal pedestal and vertical pedestal in adjustment System 4 are equipped with slide block slot 37, on slide block slot 37 two sides, be provided with fixing hole 38, this fixing hole 381 is corresponding with the trepanning 13 of pit shaft simulation system, for the upper end of fixing pit shaft simulation system 2.
When test, assemble after pit shaft simulation system, pit shaft simulation system is placed on after adjustment System, utilize fixing hole and trepanning to adjust to the angle of inclination that pit shaft simulation system needs, refill and join reservoir simulation system and recovery system, data collecting system is distinguished connecting electronic pressure gauge one by data wire, pressure gauge two, gas flowmeter, fluid flow is taken into account drain discharge meter for showing above-mentioned data, after whole analogue means assembles, after closing gate valve, put into coal sample and implement saturated adsorption under 24 hours original reservoir pressure conditions (by putting into coal cinder at three axle adsorption-desorption instrument, natural gas bottle group input combustion gas, and realize the absorption of coal cinder by oil pressure pump and the given applicable pressure of hydraulic pamp), when adsorbance reaches after requirement, opening out water pump adds water to whole pit shaft, in the time that wellbore pressure is the same with reservoir pressure, open the sluices and open submersible pump, implement the experiment of commingling production coal bed gas well production simulation.
1, utilize data collecting system to record the data such as some groups of displacement of testing, casing pressure, stream pressure, gas production, the coal bed gas pit shaft biphase gas and liquid flow feature of qualitative analysis commingling production, sum up the maximized mining working system of gas production, for the formulation of on-the-spot coal bed gas well mining working system provides guidance instruction.
2, in order to observe the interlayer interference phenomenon in mining process, can pump into colored liquid in certain coal sample the inside, in the time observing interlayer interference phenomenon, can analyze the gas flow data of disturbed layer and verify.
Claims (5)
1. a multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, comprise recovery system (1), it is characterized in that: recovery system (1) is connected to pit shaft analogue means (2) top, reservoir simulation system (3) is connected with the guide hole (6) in pit shaft analogue means (2), adjustment System (4) is connected to the inclination that pit shaft analogue means (2) outside and bottom are used for controlling pit shaft analogue means (2), and data collecting system (5) is connected to the mutual junction of recovery system (1), pit shaft analogue means (2) and reservoir simulation system (3).
2. multiple seam according to claim 1 is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, it is characterized in that: this pit shaft analogue means (2) connects shape with transparent glass tube (7) group and the main body frame that forms, establish Packed plug (8) in transparent glass tube (7) bottom, in transparent glass tube (7), be provided with successively from bottom to up the screen casing (9) coaxial with transparent glass tube (7) and PE pipe (10), in annular space between screen casing (9) and transparent glass tube (7), be provided with quartz sand (11), be provided with screw thread lid (12) in transparent glass tube (7) upper end, be provided with trepanning (13) at screw thread lid (12) top, PE pipe (10) top is connected with screw thread lid (12), be respectively equipped with submersible pump (14) and electronic pressure gauge one (15) in PE pipe (10) bottom, guide hole (6) is arranged on screen casing (9) and PE pipe (10) intersection and the transparent glass tube (7) with upper/lower positions, pressure gauge two (16) and water injecting pump (17) are separately positioned on transparent glass tube (7) right upper portion and middle part.
3. multiple seam according to claim 1 is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, it is characterized in that: this reservoir simulation system (3) is taking three axle adsorption-desorption instrument (18) as core, the coal sample absorption of carrying out successively under original reservoir pressure condition is conciliate, be provided with gas import (19) at three axle adsorption-desorption instrument (18) tops, oil pressure import (20), be provided with gas export (21) and confined pressure entrance (22) in three axle adsorption-desorption instrument (18) bottoms, be provided with an external pipeline (23) in three axle adsorption-desorption instrument (18) middle-end outsides, be provided with gate valve (24) at extension tube attached line (23) middle end of upper section, be provided with gas-liquid separator (25) on gate valve (24) right side, lid gas-liquid separator (25) outlet is divided into gas pipeline (26) and water pipeline (27), on gas pipeline (26) and water pipeline (27), be separately installed with gas flowmeter (28) and fluid flowmeter (29), this gas import (19) is connected by pipeline with natural gas bottle group (30), this oil pressure import (20) is connected by pipeline with hand-driven oil hydraulic pump (31), this gas export (21) connects the tank (32) with graduated cylinder by pipeline, this confined pressure entrance (22) connects manual water press pump (33) by pipeline.
4. multiple seam according to claim 1 is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, it is characterized in that: this recovery system (1) comprises gas tank (34) and pond (35), between gas tank (34) and pit shaft analogue means (2), be provided with drain discharge meter (36).
5. multiple seam according to claim 1 is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting, it is characterized in that: the main body pedestal of this adjustment System (4) is structure of right angle tyoe, horizontal pedestal and vertical pedestal in adjustment System (4) are equipped with slide block slot (37), on slide block slot (37) two sides, are provided with fixing hole (38).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420276793.5U CN204024612U (en) | 2014-05-27 | 2014-05-27 | A kind of multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting |
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| CN201420276793.5U CN204024612U (en) | 2014-05-27 | 2014-05-27 | A kind of multiple seam is closed the coal bed gas pit shaft biphase gas and liquid flow analogue means of adopting |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453802A (en) * | 2014-05-27 | 2015-03-25 | 贵州省煤层气页岩气工程技术研究中心 | Multi-seam joint exploitation coal seam gas shaft gas-liquid two-phase flow simulation device |
| CN106124705A (en) * | 2016-07-21 | 2016-11-16 | 中国地质大学（武汉） | A kind of biphase gas and liquid flow analog |
| CN108316916A (en) * | 2018-01-15 | 2018-07-24 | 河南理工大学 | Mining pressure drop under different conditions of coal bed gas reservoir controls simulation experiment method |
| CN109164104A (en) * | 2018-09-18 | 2019-01-08 | 太原理工大学 | A kind of abandoned mine goaf gas-liquid two-phase adverse current visual Simulation pilot system |
| CN110595940A (en) * | 2019-09-24 | 2019-12-20 | 中联煤层气有限责任公司 | Physical simulation system and method for coal bed gas critical desorption |
-
2014
- 2014-05-27 CN CN201420276793.5U patent/CN204024612U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453802A (en) * | 2014-05-27 | 2015-03-25 | 贵州省煤层气页岩气工程技术研究中心 | Multi-seam joint exploitation coal seam gas shaft gas-liquid two-phase flow simulation device |
| CN106124705A (en) * | 2016-07-21 | 2016-11-16 | 中国地质大学（武汉） | A kind of biphase gas and liquid flow analog |
| CN108316916A (en) * | 2018-01-15 | 2018-07-24 | 河南理工大学 | Mining pressure drop under different conditions of coal bed gas reservoir controls simulation experiment method |
| CN109164104A (en) * | 2018-09-18 | 2019-01-08 | 太原理工大学 | A kind of abandoned mine goaf gas-liquid two-phase adverse current visual Simulation pilot system |
| CN109164104B (en) * | 2018-09-18 | 2021-02-12 | 太原理工大学 | Gas-liquid two-phase countercurrent visual simulation test system for abandoned mine goaf |
| CN110595940A (en) * | 2019-09-24 | 2019-12-20 | 中联煤层气有限责任公司 | Physical simulation system and method for coal bed gas critical desorption |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20160527 |