摘要
页岩气藏中的天然气主要以3种方式存在于储集空间内:孔隙、裂缝中的游离气以及吸附气。应用新的页岩气储集空间概念,即考虑吸附气所占的体积,采用改进的容积法对页岩气藏的静态地质储量进行计算评价。除此之外,在采用物质平衡法预测页岩气藏动态储量时,根据页岩气开采实际情况,游离气和吸附气同采时,提出新的页岩气藏动态预测图。依据岩心分析得出的等温吸附线,地层压力和累计产气量呈现复杂的曲线关系。
The natural gas of Shale gas reservoir mainly exist in reservoir Spaces in three ways including the free gas of pore,the free gas of intrinsic fracture and adsorbed gas.This paper applies a new shale gas reservoir space concept,namely consideration of adsorbed gas volume,this paper presents an improvement method to calculate and evaluate the shale gas static geological reserves.In addition,in the use of material balance method for forecasting shale gas reservoir dynamic reserves,the paper contacts the actual situation of shale gas covering,that's when the free gas and adsorbed gas covering together,the paper puts forward a new shale gas reservoir dynamic prediction map.Based on the adsorption isotherm of core analysis,the formation pressure and accumulative gas production is not linear relation,but also present complicated curve relationship.
出处
《重庆科技学院学报（自然科学版）》
CAS
2013年第3期39-42,65,共5页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
"十二五"国家重大专项(2011ZX05010-002)
关键词
页岩气
储量计算
储集空间模型
等温吸附线
物质平衡法
shale gas
calculation of reserves
reservoir space model
adsorption isotherm
material balance method
