煤储层渗透率动态预测模型适用性评价

基于比较理论推导建立的4个煤层渗透率计算模型,对我国煤层气盆地已有物性参数进行计算,以预测其煤储层渗透率。将模型预测结果与现场试井渗透率数据进行对比分析,得出了4个模型的预测精度,在此基础上研究了煤储层渗透率动态预测模型对我国煤层气部分区块的适用性。计算结果表明:在煤层气开发后期,汪-张模型的适用性较好,预测结果与现场数据基本一致,对煤层气开采有一定指导意义。

Applicability Assessment of Coal Reservoir Permeability Dynamic Prediction Model

Based on comparison theory deduced and established four coal seam permeability computation models and carried out computations for existing physical property parameters in the country＇s CBM basins to predict coal reservoir permeability.Contrastively analyzed the model predicted results and site well testing permeability data,worked out prediction accuracy of the four models,on these grounds,studied applicability of the coal reservoir permeability dynamic prediction model for part of CBM blocks in the country.Computation results have demonstrated that,during the later stage of CBM exploitation,the applicability of the WangZhang models are rather good,the predicted results are basically identical with site data,thus they have certain guiding significance to CBM mining.