沁水盆地煤层气富集单元划分

Classification of coalbed methane enrichment units in Qinshui basin

通过分析研究影响沁水盆地煤层气富集的构造动力条件、热动力条件和水动力条件,进而以沁水盆地形成的构造动力条件为基础,结合热动力条件和水动力条件,对沁水盆地煤层气富集单元进行划分。研究结果表明:沁水盆地可以划分为4个地质构造单元、9个煤层气富集区,并通过可采性评价,确定了2个煤层气开发有利区和3个较有利区;煤层气富集是构造动力条件、热动力条件和水动力条件综合作用以及时空匹配的结果,这3个条件的合理配置才能形成煤层气开发的有利区块。

The paper has studied tectonic dynamical conditions, thermal dynamical conditions and hydraulic condi- tions influencing coalbed methane enrichment in Qinshui basin. Coalbed methane enrichment units have been di- vided based on tectonic dynamical conditions in Qinshui basin and combined with thermal dynamical conditions and hydraulic conditions. The results show that there are four geological tectonic units and nine coalbed methane enrichment units in Qinshui basin, the two more favorable areas and three favorable areas of coalbed methane ex- ploitation have been affirmed by possible recovery assessment. Coalbed methane enrichment has resulted from combined action of tectonic dynamical conditions, thermal dynamical conditions and hydraulic conditions as well as time-space configuration, the reasonable combination of tectonic dynamical conditions, thermal dynamical con- ditions and hydraulic conditions could have formed the best zone for coalbed methane exploitation.