Resources & Industries ›› 2019, Vol. 21 ›› Issue ( 1): 59-62.DOI: 10.13776/j.cnki.resourcesindustries.20190107.002
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TIAN Xinjuan
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田新娟
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Abstract: Accuracy of coal bed methane (CBM) concentration tests is closely related to CBM resources evaluation and development. This paper studies the influence of error between desorption gas temperature and atmospheric temperature on the test results, and temperature change on the dead volume of desorption tank. If atmospheric temperature is regarded as temperature of desorption gas in container, some error will be bound during testing CBM concentration. The test result will be larger when desorption gas temperature is higher than atmospheric temperature in a swelling state, vice verse. The larger the temperature difference is, the larger the error will be. If the desorption gas temperature changes largely, this should be considered to estimate this influence on CBM concentration tests. Test result will be larger if desorption gas temperature rises, smaller if decreases. Testing error positively rises with desorption gas temperature changes.
Key words: coal bed methane, gas concentration, temperature
摘要: 煤层气含量测试准确与否,直接影响到煤层气资源评价的准确性与开发工程的成功率。研究煤层气含量测试过程中,气体计量器中解吸气体的温度和大气温度的误差对解吸气含量测试结果的影响,以及温度变化对解吸罐中死体积的影响。结果表明,如果将大气温度看作气体计量器中解吸气体的温度,将使煤层气含量测试结果产生一定误差:当解吸温度大于大气温度时,气体膨胀,测试结果偏大;反之,气体冷缩,测试结果偏小;解吸温度和大气温度相差越大,误差越大。在解吸温度发生明显变化时,应考虑由其引起的解吸罐中气体死体积的变化对气含量测试结果的影响:解吸温度增加时,测试结果偏大,反之偏小;解吸温度变化越大,误差越大。
关键词: 煤层气, 气含量, 温度
CLC Number:
F206
TIAN Xinjuan. INFLUENCE OF ATMOSPHERIC TEMPERATURE ON COAL BED METHANE CONCENTRATION TESTS[J]. Resources & Industries, 2019, 21( 1): 59-62.
田新娟. 大气温度对煤层气含量测试的影响[J]. 资源与产业, 2019, 21( 1): 59-62.
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