煤层气水力致裂试验方法研究

Study on An Experimental Method of Hydraulic Fracturing of Coal-bed Gas

根据水力致裂试验经典曲线和理论分析得出煤层水力致裂试验的典型分析曲线;以沁水盆地南部测试井为试验对象,对煤层的原地应力进行测定。利用平方根法和双对数法对水力致裂试验数据进行分析和研究,得出沁水盆地南部煤层原地应力的实验数值以及2种方法的相互验证准确可信。煤层水力致裂测试结果为煤层勘探、测试和后期排采作业过程提供了基础。

According to classic curves of hydraulic fracturing test in coal seam and theoretical analysis, this paper obtained typical anal- ysis curves of hydraulic fracturing test. Taking testing well in Southern Qinshui basin as the research object, the in - situ stress of coal seam is measured. The hydraulic fracturing test data were analyzed and studied by double logarithm method and root squaring method, the empirical value of in - situ stress in Southern Qinshui basin and the mutual authentication of the two methods are accurate and cred- ible. The test results of coal - bed hydraulic fracturing provide a basis for coal - bed methane exploration, testing, discharge and min- ing operations process in late stage.