摘要
随着北美页岩气勘探开发的成功,页岩气资源越来越受到重视.我国页岩气层评价从勘探和开发等多个方面也得到了迅猛发展.页岩储层较为致密,以较小的纳米级微孔隙微裂缝作为主要储集空间,具有与常规储层不同的储集空间特征,因此决定了油气储集的特殊性.天然气在页岩中多以游离态和吸附态两种赋存状态为主,并且吸附气占主要组成部分.因此研究天然气在页岩中的吸附机理,建立吸附模型,对于页岩气储层含气性评价具有至关重要的作用.本文对页岩气储层特点进行简要介绍,提出现有页岩吸附模型的局限性,简要介绍并总结了近几年常用的页岩亚临界吸附模型和超临界吸附模型的基本思路,对页岩气的勘探开发具有一定参考作用和指导意义.
Based on the success of shale gas exploration and development in North America,shale gas resources have receive more and more attention. Evaluation of shale gas reservoirs in many aspects of exploration and development have been developed rapidly in our country. With nano-pores and micro-cracks as the main reservoir space,the shale gas reservoirs are more tight and different from characteristics of the conventional reservoirs. Therefore,it determines the particularity of the reservoirs. Gas in shale has free state and adsorption state of two types,and adsorbed gas accounted for the main part. So studying adsorption mechanism and founding adsorption model of shale gas reservoirs are crucial to shale gas reservoir evaluation. This paper will first briefly introduce the characteristics of shale gas reservoirs and present the limitations of present adsorption model. Besides,the paper will present a brief introduction and summary of the basic ideas of shale subcritical and supercritical adsorption model in recent years. Desirable to have certain reference function and significance for the exploration and development of shale gas.
出处
《地球物理学进展》
CSCD
北大核心
2016年第3期1080-1087,共8页
Progress in Geophysics
基金
国家自然基金项目(41174096)
国家重大科技专项(2011ZX05044)联合资助
关键词
页岩
吸附模型
亚临界吸附
超临界吸附
含气量
shale
adsorption model
subcritical adsorption
supercritical adsorption
gas content
