煤层气地质演化史数值模拟

建立了定量表述煤层气地质演化过程的动态平衡动力学模型，研究了沁水盆地南部边缘已知区山西组主煤层煤层气地质演化史特征，并用拟合方法获得部分模拟参数、对盆地深部未知区进行模拟计算，查明了未知区山西组主煤层煤层气地质演化史特征．利用模拟结果，定量预测了未知区山西组主煤层含气性和储层压力等参数的数值范围和空间变化特征．进一步通过最佳组合分析，预测未知区内山西组主煤层煤层气有利开发区分别位于沁水、郑庄东北部和沁源西南部一带、

Numerical simulation of coalbed methane geologic evolution history

Dynamic equilibrium model was built to quantitatively describe coalbed methane (CBM) evolution in geologic history. CBM geologic evolution history of Shanxi Formation main coal seam in edge of south Qinshui Basin was studied. Basic simulation parameters were gained by the way of fitting. Simulation calculation of deep buried and unknown area was conducted and CBM geologic evolution process in the area was founded out. Data range and spatial distrution of gas content and reservoir pressure in unknown area was predicted by using simulation results. Further prediction of favorite CBM exploitation region determination was also made by the way of optimal combining analysis. One of the most favorite CBM exploitation regions locates in east-west of Qinshui and Zhengzhuang, the other locates in south-west of Qinyuan.