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煤层瓦斯压力是评价煤层突出危险性与计算煤层瓦斯含量的一个重要指标。传统被动式测压测试数据准确,比较接近原始储层压力,但是存在测试时间长、测试仪器的不可重复使用性的不足。煤层瓦斯原位探测仪由水力密封装置、探测与存储装置和自动取样装置3部分组成。利用该仪器能够在钻孔中做到随钻随测,且具有可重复性使用的特点,不仅可准确测得某一深度的煤层瓦斯压力,记录压力随时间的具体变化,节省了测试时间和人力物力,在煤层瓦斯测压方面具有推广价值。
Coal seam gas pressure is an important index to evaluate the outstanding danger of coal seam and calculate the gas content of coal seam. Traditional passive manometry test data is accurate, relatively close to the original reservoir pressure, but there is a long test time, the lack of reusability of test equipment. Seam gas in situ detector by the hydraulic seal, detection and storage devices and automatic sampling device composed of three parts. The instrument can be used in the drilling while drilling, and has the characteristics of the use of repeatability, not only can accurately measure a certain depth of coal seam gas pressure, pressure changes with the record of specific changes over time, saving test time and Human and material resources, in the coal seam gas pressure measurement has the promotion value.