控制地层剖面中天然气扩散散失的地质因素  

GEOLOGICAL FACTORS CONTROLING GAS DIFFUSION LOSS IN STRATA SECTION

作　　者：付广[1] 苏玉平[1] 

机构地区：[1]大庆石油学院,黑龙江大庆163318

出　　处：《天然气地球科学》2004年第1期58-61,共4页Natural Gas Geoscience

基　　金：国家重点基础研究发展规划项目"天然气高效运移输导物理模拟及地质模式"(编号:2001CB209104)资助.

摘　　要：通过对地层剖面中控制天然气扩散散失地质因素的分析认为:供气条件是控制天然气是否扩散和能否持续扩散下去的主要因素;温压条件控制着天然气在地层水中浓度的大小及其变化,从而控制着天然气扩散的方向及其强度;岩石类型及其组合控制着天然气扩散系数的大小;上覆浓度盖层及其形成时期控制着天然气扩散是否终止及其时期。Through the analysis of gas diffussion loss mechanism and its influce factors in strata ,in this paper the geological factors cintrolling gas diffusion loss in strata section was studied overally and systermly.This papper considered that the good or bad of supplying gas conditions controlled the happen and the continousness of gas diffusion; the concentration of gas in water and its variaty of strata section were controlled by the conditions of temperature and pressure environment,which further controlled the direction and intensity of gas diffusion;the types of rocks and their combination in strata section controlled the big or small of gas diffusion coefficient; the stop and the stop period of gas diffusion was controlled by the overlying concentration caprock and its formation period.

关 键 词：地层剖面 天然气扩散 温压环境 岩石类型 岩石组合 上覆浓度盖层 

分 类 号：TE122.12[石油与天然气工程—油气勘探]