CN203175525U - Production increasing and reformation experimental apparatus for coal reservoir in formation condition - Google Patents
Production increasing and reformation experimental apparatus for coal reservoir in formation condition Download PDFInfo
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- CN203175525U CN203175525U CN 201320157515 CN201320157515U CN203175525U CN 203175525 U CN203175525 U CN 203175525U CN 201320157515 CN201320157515 CN 201320157515 CN 201320157515 U CN201320157515 U CN 201320157515U CN 203175525 U CN203175525 U CN 203175525U
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- 239000003245 coal Substances 0.000 title claims abstract description 75
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 24
- 239000011435 rock Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 13
- 239000002817 coal dust Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 3
- 239000003292 glue Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 31
- 230000035699 permeability Effects 0.000 description 14
- 238000013461 design Methods 0.000 description 12
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000002407 reforming Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000013401 experimental design Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012353 t test Methods 0.000 description 1
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Abstract
The utility model relates to a production increasing and reformation experimental apparatus for a coal reservoir in a formation condition. The experimental apparatus is provided with a load platform on which an electrical heating calorstat is arranged, the electrical heating calorstat is provided with a coal sample, the periphery of the coal sample is sequentially provided with a sealed glue sheath and a core holding unit with a pipeline hole, and X, Y and Z directions of the core holding unit are respectively loaded with an X-direction confining pressure loading device, a Y-direction confining pressure loading device and a Z-direction confining pressure loading device, and an experimental oil pipe is inserted into the coal sample; the side of the experimental oil pipe is respectively connected with a coal dust collecting tank and a pressure quick releases tank; and six surfaces of the core holding unit with the pipeline hole are connected with pipelines which are communicated with a gas-liquid separating device. The experimental apparatus can not only combine and simulate production increasing and reformation ways of different coal reservoirs, but also accurately analyze a simulated production increasing and reformation effect; and the experimental apparatus is low in cost, high in efficiency, and easy to operate, effectively saves manpower and material resources, and brings great convenience to science researchers.
Description
Technical field
The utility model relates to a kind of experimental facilities, especially can effectively simulate under the formation condition of the multiple volume increase reforming mode of coal seam reservoirs under the original position formation condition and effect thereof the coal seam reservoirs volume increase and transform experimental facilities.
Background technology
Along with China's energy resource structure is continued to optimize, the demand of natural gas is constantly increased, the natural gas imbalance between supply and demand is outstanding day by day.China's coal bed gas resource amount is huge, and according to national new round oil and gas resource evaluation result, the coal bed gas geological resource total amount of China buried depth 2000m is 36.8 tcms, and is suitable substantially with the conventional gas resource, is the valuable source that China forms growth gas point.Yet China's coal seam permeability is generally on the low side; influence China's coal bed gas scale, commercial development; particularly be that the coal seam, deep is in that permeability worsens more under heavily stressed, higher high temperature, the high formation pressure; survey factually data 800m with dark coal seam permeability mostly less than in addition much smaller than 0.1mD, this causes very big difficulty for deep coal bed gas resource exploitation.Therefore, extraction/extraction deep coal bed gas resource must take reservoir reconstruction anatonosis measure.And that the volume increase mode comprises is a variety of: such as physics pressure break, cave completion and chemical improvement, how at the reservoir characteristics, preferred reservoir reconstruction mode, for we improve the coal bed gas recovery ratio and efficient significant.
Do not see the different coal seam reservoirs volume increase of combine analog at present both at home and abroad as yet and transform experimental facilities, can not satisfy the requirement that cave fracturing, foam fracturing and bore hole cave volume increase mode are simulated; The present domestic three fracturing equipment of having developed as Langfang branch of PetroChina Company Limited. and China University Of Petroleum Beijing, but are not all considered temperature factor, and can't test volume increase transformation process permeability variation simultaneously, describe based on the crack for the correctional effect analysis is many; Because the coal seam reservoirs pressure break is made the law of development of seam crack initiation, extension and expansion, the numerical simulation mode is analyzed and is difficult to accurately simulation volume increase correctional effect now; It is feasible that original position coal seam site operation mode is analyzed the volume increase reforming mode, but cost is too high, efficient is low, and the subterranean coal complexity is difficult to clear the grasp and influences correctional effect factor and optimization reforming mode how.
The utility model content
Can not effectively simulate the problem of multiple formation condition and coal seam reservoirs volume increase reforming mode in order to overcome existing technology, the utility model provides coal seam reservoirs volume increase transformation experimental facilities under a kind of formation condition, this experimental facilities not only can increase production reforming mode by the different coal seam reservoirs of combine analog, accurately analysis mode increases production correctional effect, cost is low, efficient is high, easy operating, effectively saved manpower and materials, brought great convenience to researcher.
The technical scheme that its technical problem that solves the utility model adopts is: this experimental facilities is provided with a flat payload platform, payload platform is provided with the electrical heating insulating box, the electrical heating insulating box provides temperature for the experiment rock core, in the electrical heating insulating box coal sample is housed, the periphery of coal sample is provided with the core holding unit in seal rubber sleeve and band pipeline hole successively, the salable rock core of seal rubber sleeve, make it to isolate with external fluid, core holding unit can be used to clamp rock core, fixing rock core, and provide the platform of pressure-loaded, the X of core holding unit, Y, the Z direction is loaded with X-direction confined pressure charger respectively, Y-direction confined pressure charger and Z-direction confined pressure charger, the experiment oil pipe passes the tank wall of electrical heating insulating box successively, core holding unit and seal rubber sleeve are inserted in the coal sample, the outside of experiment oil pipe coincide and is nested with experiment thimble, one end of experimental oil tube and tube line I and pipeline II links to each other, the pipeline I is being communicated with gas cylinder and water tank respectively with the other end of pipeline II, gas cylinder links to each other with the increase pump, is equipped with by-pass valve control and pressure gauge on pipeline I and the pipeline II; The side of described experiment oil pipe is connecting the ickings collecting box respectively and pressure discharges case fast, and experiment oil pipe and pressure discharge fast and is provided with flow control valve between the case; Six faces of the core holding unit in described band pipeline hole all are connected with pipeline, and pipeline is connected with gas-liquid separation device, and gas-liquid separation device is connected with gas flow and takes into account fluid flowmeter.
This experimental facilities carries out gas/hydraulic pressure, and to split the step of simulated experiment as follows:
(1) primary condition is set: coal sample is fixed, according to the residing temperature of sample and pressure environment under the formation condition of experimental design, regulate electrical heating insulating box, X-direction confined pressure charger, Y-direction confined pressure charger and Z-direction confined pressure charger to temperature and the confined pressure of design, open gas cylinder and by-pass valve control, use booster pump to be pressurized to fluid pressure under the formation condition, make the initial reservoir fluid pressure of coal sample reach balance.
(2) pressure break experiment: after the balance, further change the pressure of booster pump to the frac pressure of design, oil pipe is injected in the coal sample by experiment, carries out the pressure break experimental simulation.
(3) pressure break coal dust cleaning: after the pressure break experiment finishes, stop up the crack owing to can produce chip, therefore must open boring ickings collecting box valve to the cleaning of pressure break coal dust, still the mode by step 2 is injected experiment oil pipe gas continuously, returns and blows coal dust to the ickings collecting box;
(4) permeability determination: again according to the pressure that designs, as program in the step 2, oil pipe is to coal sample end face centre bore injecting gas by experiment, fluid enters coal sample from axle center hole, by being distributed in the fluid metering system of core holding unit four side surfaces, measure flow or the flow velocity of coal sample external surface different directions, records center boring injection pressure and core outside surface pressure is poor simultaneously, calculate the four direction permeability according to recording coal sample inside and outside differential pressure and flow, and then analyze fracturing effect.
The step that this experimental facilities carries out cave completion simulated experiment is as follows:
(1) primary condition is set: coal sample is fixed, according to the residing temperature of coal sample and pressure environment under the formation condition of experimental design, regulate electrical heating insulating box, X-direction confined pressure charger, Y-direction confined pressure charger and Z-direction confined pressure charger to temperature and the confined pressure of design, open gas cylinder and by-pass valve control, use booster pump to be pressurized to fluid pressure under the formation condition, make the initial reservoir fluid pressure of coal sample reach balance.
(2) cave completion experiment: after the balance, further change the pressure of booster pump to the frac pressure of design, oil pipe is injected in the coal sample by experiment.
(3) rapid pressure discharges and makes the cave: open the valve that pressure discharges case fast, adopt flow control valve to set target flow or directly open and close flow control valve and make pipeline directly be communicated with atmosphere, pressure in the circular small bore is discharged rapidly; After cave completion experiment finishes, owing to can produce chip, must clear up coal dust, open boring ickings collecting box valve, still the mode by step 2 is injected experiment oil pipe gas continuously, returns and blows coal dust to the ickings collecting box;
(4) permeability determination: again according to the pressure that designs, as program in the step 2, oil pipe is to coal sample end face centre bore injecting gas by experiment, fluid enters coal sample from axle center hole, by being distributed in the fluid metering system of core holding unit four side surfaces, measure flow or the flow velocity of coal sample external surface different directions, records center boring injection pressure and core outside surface pressure is poor simultaneously, calculate the four direction permeability according to recording coal sample inside and outside differential pressure and flow, and then analyze fracturing effect.
In addition, the coal seam reservoirs volume increase is transformed experimental facilities and also can be utilized injecting carbon dioxide or other fluids injection coal seam under the described formation condition, thereby realizes changing the reservoir permeability effect simulation by chemical mode.
The beneficial effects of the utility model are, this experimental facilities not only can increase production reforming mode by the different coal seam reservoirs of combine analog, and accurately analysis mode increases production correctional effect, and cost is low, efficient is high, easy operating, effectively saved manpower and materials, brought great convenience to researcher.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is structural principle schematic diagram of the present utility model.
Fig. 2 is the vertical view of electrical heating insulating box.
Among the figure, 1. by-pass valve control, 2. pressure gauge, 3. booster pump, 4. pipeline I, 5. ickings collecting box, 6. the pipeline II is 7. tested oil pipe, 8. flow control valve, 9. experiment thimble, 10.Z is to the confined pressure charger, and 11. pressure discharge case fast, 12. the pressure gauge I, 13. gas-liquid separation devices, 14. gas flowmeters, 15. fluid flowmeter, 16. by-pass valve control II, 17.X is to the confined pressure charger, 18. the electrical heating insulating box, 19. coal samples, 20. core holding units, 21. payload platform, 22. fastening devicess, 23. water tanks, 24. gas cylinder, 25.Y to the confined pressure charger, 26. pipelines, 27. seal rubber sleeves.
The specific embodiment
In the drawings, this experimental facilities is provided with a flat payload platform 21, payload platform 21 is provided with electrical heating insulating box 18, electrical heating insulating box 18 provides temperature for the experiment rock core, coal sample 19 is housed in the electrical heating insulating box 18, the periphery of coal sample 19 is provided with the core holding unit 20 in seal rubber sleeve 27 and band pipeline hole successively, seal rubber sleeve 27 salable rock cores, make it to isolate with external fluid, core holding unit 20 can be used to clamp rock core, fixing rock core, and provide the platform of pressure-loaded, the X of core holding unit 20, Y, the Z direction is loaded with X-direction confined pressure charger 17 respectively, Y-direction confined pressure charger 25 and Z-direction confined pressure charger 10, experiment oil pipe 7 passes the tank wall of electrical heating insulating box 18 successively, core holding unit 20 and seal rubber sleeve 27 are inserted in the coal sample 19, the outside of experiment oil pipe 7 coincide and is nested with experiment thimble 9, experiment oil pipe 7 links to each other with an end of pipeline I 4 and pipeline II 6, pipeline I 4 is being communicated with gas cylinder 24 and water tank 23 respectively with the other end of pipeline II 6, gas cylinder 24 links to each other with increase pump 3, is equipped with by-pass valve control 1 and pressure gauge 2 on pipeline I 4 and the pipeline II 6; The side of described experiment oil pipe 7 is connecting ickings collecting box 5 respectively and pressure discharges case 11 fast, and experiment oil pipe 7 and pressure discharge fast and is provided with flow control valve 8 between the case 11; Six faces of the core holding unit 20 in described band pipeline hole all are connected with pipeline 26, and pipeline 26 is connected with gas-liquid separation device 13, and gas-liquid separation device 13 is connected with gas flowmeter 14 and fluid flowmeter 15.
This experimental facilities carries out gas/hydraulic pressure, and to split the step of simulated experiment as follows:
(1) primary condition is set: coal sample 19 is fixed, according to the residing temperature of sample and pressure environment under the formation condition of experimental design, regulate electrical heating insulating box 18, X-direction confined pressure charger 17, Y-direction confined pressure charger 25 and Z-direction confined pressure charger 10 to temperature and the confined pressure of design, open gas cylinder 24 and by-pass valve control 1, use booster pump 3 to be pressurized to fluid pressure under the formation condition, make the initial reservoir fluid pressure of coal sample 19 reach balance.
(2) pressure break experiment: after the balance, further change the pressure of booster pump 3 to the frac pressure of design, oil pipe 7 by experiment, are injected in the coal sample 19, carry out the pressure break experimental simulation.
(3) pressure break coal dust cleaning: after the pressure break experiment finishes, stop up the crack owing to can produce chip, therefore must open boring ickings collecting box 5 valves to the cleaning of pressure break coal dust, still the mode by step 2 is injected experiment oil pipe 7 gases continuously, returns and blows coal dust to ickings collecting box 5;
(4) permeability determination: again according to the pressure that designs, as program in the step 2, oil pipe 7 is to coal sample 19 end face centre bore injecting gas by experiment, fluid enters coal sample 19 from axle center hole, by being distributed in the fluid metering system of core holding unit 20 4 side surfaces, measure flow or the flow velocity of coal sample 19 external surface different directions, records center boring injection pressure and core outside surface pressure is poor simultaneously, calculate the four direction permeability according to recording coal sample 19 inside and outside differential pressures and flow, and then analyze fracturing effect.
The step that this experimental facilities carries out cave completion simulated experiment is as follows:
(1) primary condition is set: coal sample 19 is fixed, according to the residing temperature of coal sample and pressure environment under the formation condition of experimental design, regulate electrical heating insulating box 18, X-direction confined pressure charger 17, Y-direction confined pressure charger 25 and Z-direction confined pressure charger 10 to temperature and the confined pressure of design, open gas cylinder 24 and by-pass valve control 1, use booster pump 3 to be pressurized to fluid pressure under the formation condition, make the initial reservoir fluid pressure of coal sample 19 reach balance.
(2) cave completion experiment: after the balance, further change the pressure of booster pump 3 to the frac pressure of design, oil pipe 7 by experiment, are injected in the coal sample 19.
(3) rapid pressure discharges and makes the cave: open the valve that pressure discharges case 11 fast, adopt flow control valve 8 to set target flow or directly open and close flow control valve 8 to make pipeline 26 directly be communicated with atmosphere, pressure in the circular small bore is discharged rapidly; After cave completion experiment finishes, owing to can produce chip, must clear up coal dust, open boring ickings collecting box 5 valves, still the mode by step 2 is injected experiment oil pipe 7 gases continuously, returns and blows coal dust to ickings collecting box 5;
(4) permeability determination: again according to the pressure that designs, as program in the step 2, oil pipe 7 is to coal sample 19 end face centre bore injecting gas by experiment, fluid enters coal sample 19 from axle center hole, by being distributed in the fluid metering system of core holding unit 20 4 side surfaces, measure flow or the flow velocity of coal sample 19 external surface different directions, records center boring injection pressure and core outside surface pressure is poor simultaneously, calculate the four direction permeability according to recording coal sample 19 inside and outside differential pressures and flow, and then analyze fracturing effect.
In addition, the coal seam reservoirs volume increase is transformed experimental facilities and also can be utilized injecting carbon dioxide or other fluids injection coal seam under the described formation condition, thereby realizes changing the reservoir permeability effect simulation by chemical mode.
Claims (5)
1. experimental facilities is transformed in the coal seam reservoirs volume increase under the formation condition, this experimental facilities is provided with a flat payload platform (21), it is characterized in that, payload platform (21) is provided with electrical heating insulating box (18), electrical heating insulating box (18) provides temperature for the experiment rock core, coal sample (19) is housed in the electrical heating insulating box (18), the periphery of coal sample (19) is provided with the core holding unit (20) in seal rubber sleeve (27) and band pipeline hole successively, experiment oil pipe (7) passes the tank wall of electrical heating insulating box (18) successively, core holding unit (20) and seal rubber sleeve (27) are inserted in the coal sample (19), experiment oil pipe (7) links to each other with an end of pipeline I (4) and pipeline II (6), pipeline I (4) is being communicated with gas cylinder (24) and water tank (23) respectively with the other end of pipeline II (6), and gas cylinder (24) links to each other with increase pump (3); The side of described experiment oil pipe (7) is connecting ickings collecting box (5) respectively and pressure discharges case (11) fast, six faces of the core holding unit (20) in described band pipeline hole all are connected with pipeline (26), pipeline (26) is connected with gas-liquid separation device (13), and gas-liquid separation device (13) is connected with gas flowmeter (14) and fluid flowmeter (15).
2. the experiment dress is transformed in the coal seam reservoirs volume increase under the formation condition according to claim 1, it is characterized in that X, the Y of described core holding unit (20), Z direction are loaded with X-direction confined pressure charger (17), Y-direction confined pressure charger (25) and Z-direction confined pressure charger (10) respectively.
3. the experiment dress is transformed in the coal seam reservoirs volume increase under the formation condition according to claim 1, it is characterized in that, the outside of described experiment oil pipe (7) coincide and is nested with experiment thimble (9).
4. the experiment dress is transformed in the coal seam reservoirs volume increase under the formation condition according to claim 1, it is characterized in that, is equipped with by-pass valve control (1) and pressure gauge (2) on described pipeline I (4) and the pipeline II (6).
5. the experiment dress is transformed in the coal seam reservoirs volume increase under the formation condition according to claim 1, it is characterized in that described experiment oil pipe (7) and pressure discharge fast and is provided with flow control valve (8) between the case (11).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320157515 CN203175525U (en) | 2013-04-01 | 2013-04-01 | Production increasing and reformation experimental apparatus for coal reservoir in formation condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320157515 CN203175525U (en) | 2013-04-01 | 2013-04-01 | Production increasing and reformation experimental apparatus for coal reservoir in formation condition |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195401A (en) * | 2013-04-01 | 2013-07-10 | 中国矿业大学 | Coal reservoir yield increasing transforming experiment device under stratum conditions |
| CN108240925A (en) * | 2016-12-26 | 2018-07-03 | 中国石油天然气股份有限公司 | Core slice visualization model and preparation method and experimental method thereof |
| CN113338899A (en) * | 2021-03-24 | 2021-09-03 | 中国矿业大学 | Drainage and mining control method based on dynamic change rule of permeability of coal reservoir in drainage and mining process |
-
2013
- 2013-04-01 CN CN 201320157515 patent/CN203175525U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195401A (en) * | 2013-04-01 | 2013-07-10 | 中国矿业大学 | Coal reservoir yield increasing transforming experiment device under stratum conditions |
| CN108240925A (en) * | 2016-12-26 | 2018-07-03 | 中国石油天然气股份有限公司 | Core slice visualization model and preparation method and experimental method thereof |
| CN113338899A (en) * | 2021-03-24 | 2021-09-03 | 中国矿业大学 | Drainage and mining control method based on dynamic change rule of permeability of coal reservoir in drainage and mining process |
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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: 20130904 Termination date: 20150401 |
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| EXPY | Termination of patent right or utility model |