CN101845949B - Indoor simulation device for testing injection/pressure fall of coal bed methane - Google Patents
Indoor simulation device for testing injection/pressure fall of coal bed methane Download PDFInfo
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- CN101845949B CN101845949B CN 201010162049 CN201010162049A CN101845949B CN 101845949 B CN101845949 B CN 101845949B CN 201010162049 CN201010162049 CN 201010162049 CN 201010162049 A CN201010162049 A CN 201010162049A CN 101845949 B CN101845949 B CN 101845949B
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Abstract
The invention discloses an indoor simulation device for testing injection/pressure fall of coal bed methane. The device comprises a coal bed simulation device, an injection system, a date test system for the injection/pressure fall and a data acquisition system. The injection system injects water into the coal bed simulation device at set displacement within a set period of time, so that pressure distribution regions in which the pressures are higher than the original internal pressure of the coal bed simulation device are produced in an injection mineshaft of the injection system and the cold bed simulation device; after water injection is stopped, a water injection pressure is gradually balanced with the original internal pressure of the coal bed simulation device; the change of the pressure in the injection mineshaft along with time is measured by using the data test system in an injection stage and a pressure fall stage; and the data acquisition system records and analyzes the pressure change to obtain a response parameter in the coal bed simulation device in each stage. The indoor simulation device for testing the injection/pressure fall of the coal bed methane disclosed by the invention contributes to implementing and knowing a test on the injection/pressure fall better, knowing the principle of the injection/pressure fall test, and improving the accuracy of the injection/pressure fall and the correctness of data evaluation.
Description
Technical field
The present invention relates to the christmas field of engineering technology, especially a kind of indoor simulation device of testing injection/pressure fall of coal bed methane.
Background technology
Coal bed gas is a kind of high-efficiency cleaning unconventional gas resource, actively carries out at present the coal bed gas resource exploitation both at home and abroad with alleviating energy crisis, and carry out energy sustainable development under the prerequisite of protection of the environment.China's coal bed gas large-scale commercial applications exploitation is extremely urgent.Rationally Efficient Development coal seam resource must depend on the dynamic monitoring of coal bed gas, and the coal bed gas well measuring technology is the main source of the dynamic data of the formulation of bed gas reservoir development plan and adjustment, can be rated as bed gas reservoir engineer's glasses.Yet because coal bed gas belongs to unconventional gas reservoir, therefore so that the means of testing that conventional gas and oil is hidden is difficult to be applied to accurately bed gas reservoir.Testing injection/pressure fall is one of Main Means of present coal bed gas well test, but the testing injection/pressure fall basic principle is based on the theory of testing that conventional gas and oil is hidden, for this unconventional natural gas of coal bed gas whether applicable and precision how, at present not strict demonstration and definite data declaration.Therefore the present invention has set up the indoor simulation device that a cover can be used for the research of testing injection/pressure fall mechanism, for check and the optimization to the testing injection/pressure fall method.
Summary of the invention
For the problem that existing coal bed gas measuring technology exists, the object of the present invention is to provide a kind of indoor simulation device of simple in structure, the testing injection/pressure fall of coal bed methane that is conducive to improve injection pressure drop precision and data evaluation accuracy.
For achieving the above object, the indoor simulation device of a kind of testing injection/pressure fall of coal bed methane of the present invention, comprise the coal seam analogue means, injected system, the data testing system of injection pressure drop and data collecting system, injected system is to set discharge capacity water filling in the analogue means of coal seam in setting-up time, make injection pit shaft and the coal seam analogue means of injected system produce the pressure area that is higher than coal seam analogue means reset pressure, the original interior pressure of water injection pressure and coal seam analogue means is tended to balance gradually, all adopt data testing system to measure injection pit shaft pressure over time in injection stage and pressure drop stage, and record and analyze by data collecting system, to obtain the response parameter in each stage coal seam analogue means.
Further, described coal seam analogue means comprises that shell, setting are used for the constrictive a plurality of hollow rubber balls of analog gas in the enclosure, also are provided with for the flexible rubber elastomer of simulated formation on the inwall of shell.
Further, the top of described injection pit shaft connects injection pump, water tank by water pipe, also is provided with flow tester on water pipe.
Further, the data testing system of described injection pressure drop comprises several pressure test sensors, and this pressure test sensor setting is in described injection pit shaft.
Further, the distance of described each pressure test sensor and described injection pit shaft central axis does not wait, so that each described pressure test sensor measurement goes out the pressure data of different azimuth.
Further, described data collecting system comprises that signal is through amplifier, A/D converter and computer.
Further, be provided with pressure relief vent on the tube wall of described injection pit shaft.
The present invention proposes the indoor simulation device of testing injection/pressure fall of coal bed methane, is beneficial to better enforcement and understanding testing injection/pressure fall, and the mechanism of understanding testing injection/pressure fall is conducive to improve the precision of injection pressure drop and the accuracy of data evaluation.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the distribution schematic diagram of several pressure test sensors;
Fig. 3 is as a result figure of test data.
The specific embodiment
As shown in Figure 1 to Figure 3, a kind of indoor simulation device of testing injection/pressure fall of coal bed methane, the data testing system and the data collecting system that comprise coal seam analogue means, injected system, injection pressure drop, the coal seam analogue means comprises shell 1, is arranged on the shell 1 interior constrictive a plurality of hollow rubber balls 2 of analog gas that are used for, and also is provided with on the inwall of shell 1 for the flexible rubber elastomer 3 of simulated formation.Injected system comprises injects pit shaft 4, injection pump 5, water tank 6, and the top of injecting pit shaft 4 connects injection pump 5, water tank 6 by water pipe, also is provided with flow tester 7 on water pipe.
The inside of injecting pit shaft 4 is provided with pressure test section 8, in pressure test section 8, be provided with the data testing system of injection pressure drop, the data testing system of injection pressure drop comprises several pressure test sensors 9, each pressure test sensor 9 does not wait with the distance of injecting pit shaft 4 central axiss, so that each pressure test sensor 9 is measured the pressure data of different azimuth.The data that data testing system is measured gather, analyze via data collecting system, and data collecting system comprises that signal is through amplifier 10, A/D converter 11 and computer 12.
When the indoor simulation device of testing injection/pressure fall of coal bed methane of the present invention was worked, the rubber elastomer 3 suitable with its stratum elasticity selected in the area of simulation test as required first, to improve analog-quality, obtained more accurately data.Set water filling discharge capacity and the time of injected system, control injection pump 5 with constant discharge capacity to injecting pit shaft 4 water fillings, so that injection pit shaft 4 and coal seam analogue means produce the pressure distribution district that is higher than the original interior pressure of coal seam analogue means, after injection stops, hollow rubber ball 2 and rubber elastomer 3 are out of shape pressurized, so that the original interior pressure of water injection pressure and coal seam analogue means tends to balance gradually, all adopt data testing system to measure injection pit shaft 4 pressure over time in injection stage and pressure drop stage, and record and analyze by data collecting system, to obtain the response parameter in each stage coal seam analogue means.After finishing, test can carry out release by the pressure relief vent 13 that has on the tube wall that injects pit shaft 4.
Among the present invention by adopting a plurality of hollow rubber balls 2 to come the analog gas compressibilty, by adopting rubber elastomer 3 to come simulated formation elasticity, can be effective, simulate easily the situation of coal bed gas in each regional stratum and the stratum, and among the present invention by a plurality of pressure test sensors 9 are set, each pressure test sensor 9 is distributed in different orientation, it measures the data in injection and pressure drop stage at any time, record the response parameter in each stage coal seam with simulation, the data communication device that records is crossed the data acquisition system stores analysis, data process signal is through amplifier 10, store into behind the A/D converter 11 on the computer 12, reservoir parameter be can obtain by analysis, the data precision of injection pressure drop and the accuracy of data evaluation are beneficial to improve in the practical application.
Claims (6)
1. the indoor simulation device of a testing injection/pressure fall of coal bed methane, it is characterized in that, this device comprises the coal seam analogue means, injected system, the data testing system of injection pressure drop and data collecting system, injected system is to set discharge capacity water filling in the analogue means of coal seam in setting-up time, make injection pit shaft and the coal seam analogue means of injected system produce the pressure distribution district that is higher than the original interior pressure of coal seam analogue means, the original interior pressure of water injection pressure and coal seam analogue means is tended to balance gradually, all adopt data testing system to measure injection pit shaft pressure over time in injection stage and pressure drop stage, and record and analyze by data collecting system, to obtain the response parameter in each stage coal seam analogue means; Described coal seam analogue means comprises that shell, setting are used for the constrictive a plurality of hollow rubber balls of analog gas in the enclosure, also are provided with for the flexible rubber elastomer of simulated formation on the inwall of shell.
2. the indoor simulation device of testing injection/pressure fall of coal bed methane as claimed in claim 1 is characterized in that, the top of described injection pit shaft connects injection pump, water tank by water pipe, also is provided with flow tester on water pipe.
3. the indoor simulation device of testing injection/pressure fall of coal bed methane as claimed in claim 1 is characterized in that, the data testing system of described injection pressure drop comprises several pressure test sensors, and this pressure test sensor setting is in described injection pit shaft.
4. the indoor simulation device of testing injection/pressure fall of coal bed methane as claimed in claim 3, it is characterized in that, the distance of each described pressure test sensor and described injection pit shaft central axis does not wait, so that described pressure test sensor measurement goes out the pressure data of different azimuth.
5. the indoor simulation device of testing injection/pressure fall of coal bed methane as claimed in claim 1 is characterized in that, described data collecting system comprises signal amplifier, A/D converter and computer.
6. the indoor simulation device of testing injection/pressure fall of coal bed methane as claimed in claim 1 is characterized in that, is provided with pressure relief vent on the tube wall of described injection pit shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010162049 CN101845949B (en) | 2010-04-28 | 2010-04-28 | Indoor simulation device for testing injection/pressure fall of coal bed methane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010162049 CN101845949B (en) | 2010-04-28 | 2010-04-28 | Indoor simulation device for testing injection/pressure fall of coal bed methane |
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| CN101845949A CN101845949A (en) | 2010-09-29 |
| CN101845949B true CN101845949B (en) | 2013-05-01 |
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| CN 201010162049 Expired - Fee Related CN101845949B (en) | 2010-04-28 | 2010-04-28 | Indoor simulation device for testing injection/pressure fall of coal bed methane |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477864A (en) * | 2010-11-25 | 2012-05-30 | 中国石油天然气股份有限公司 | Indoor experimental simulation method for testing injection pressure drop of coal bed gas |
| CN102121384B (en) * | 2011-01-13 | 2013-01-30 | 河南理工大学 | Method for simulating coal seam mining by using rubber hydraulic bags |
| CN102134993B (en) * | 2011-01-22 | 2014-03-05 | 河南理工大学 | Simulation experiment device for controlling production of coal bed methane vertical well |
| CN103776979B (en) * | 2014-01-10 | 2016-02-24 | 河南理工大学 | A kind of coal seam water infusion suppresses analog detection method and the device of desorption of mash gas effect |
| CN104389595A (en) * | 2014-11-18 | 2015-03-04 | 山西潞安环保能源开发股份有限公司 | Acquisition method of stratum parameters of low pressure coal bed methane basin |
| CN112682039B (en) * | 2020-12-29 | 2023-04-28 | 内蒙古黄陶勒盖煤炭有限责任公司 | Coal seam drilling and water injection construction process |
Citations (5)
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| US4171664A (en) * | 1978-02-13 | 1979-10-23 | The United States Of America As Represented By The Secretary Of The Navy | Mine simulator planting rack and release mechanism |
| CN87211142U (en) * | 1987-08-06 | 1988-07-20 | 国家机械工业委员会第二○八研究所 | Ground simulator for measuring pressure and speed using charge |
| US6101447A (en) * | 1998-02-12 | 2000-08-08 | Schlumberger Technology Corporation | Oil and gas reservoir production analysis apparatus and method |
| CN100487755C (en) * | 2004-09-14 | 2009-05-13 | 中国石油天然气股份有限公司 | Analogue device for coal layer pneumatolytic deposit |
| CN201335803Y (en) * | 2008-09-12 | 2009-10-28 | 煤炭科学研究总院西安研究院 | Devices for coal-bed gas high pressure desorption instrument |
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2010
- 2010-04-28 CN CN 201010162049 patent/CN101845949B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4171664A (en) * | 1978-02-13 | 1979-10-23 | The United States Of America As Represented By The Secretary Of The Navy | Mine simulator planting rack and release mechanism |
| CN87211142U (en) * | 1987-08-06 | 1988-07-20 | 国家机械工业委员会第二○八研究所 | Ground simulator for measuring pressure and speed using charge |
| US6101447A (en) * | 1998-02-12 | 2000-08-08 | Schlumberger Technology Corporation | Oil and gas reservoir production analysis apparatus and method |
| CN100487755C (en) * | 2004-09-14 | 2009-05-13 | 中国石油天然气股份有限公司 | Analogue device for coal layer pneumatolytic deposit |
| CN201335803Y (en) * | 2008-09-12 | 2009-10-28 | 煤炭科学研究总院西安研究院 | Devices for coal-bed gas high pressure desorption instrument |
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| CN101845949A (en) | 2010-09-29 |
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