页岩气资源评价中含气量计算方法初探

Discussion on gas content calculation method of shale gas resource evaluation

摘要: 页岩气是以游离、吸附和溶解状态赋存于暗色泥页岩中的天然气,其赋存形式具有多样性,其中以游离态和吸附态为主,仅存在少量溶解态。页岩气资源评价的关键是吸附气和游离气含量的计算。游离气的主控因素是泥页岩有效孔隙度和气体饱和度,吸附气量的主控因素是有机质数量和有机质成熟度。本文在分析页岩气资源评价工作中关键参数的基础上,主要了介绍游离气和吸附气的主控因素及计算方法。

Abstract: As unconventional gas resources,shale gas is mainly consistent of the free,adsorbed and dissolved gas accumulated in dark shale beds.Among these occurrences,adsorbed and free gases are the dominated phases.Calculating adsorbed gas and free gas content is the key part of the shale gas Resource Evaluation.The key controlling free gas,adsorbed gas are porosity of shale,amount and maturation of organic matter.Based on the analysis of the key parameters in the shale gas resource evaluation,the paper mainly introduced main control factors and calculation method of free gas and adsorbed gas.