致密岩心中气体渗流特征及影响因素实验研究  

EXPERIMENTAL STUDY OF PROPERTIES AND INFLUENCING FACTORS OF GAS FLOW IN TIGHT CORE

作　　者：温晓红[1,2] 周拓 胡勇[2,4] 朱华银[2,4] 王淑英[2,4] 

机构地区：[1]中国地质大学,北京100083 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [3]中国石油大学石油工程系,山东青岛266555 [4]中国石油天然气成藏与开发重点实验室,河北廊坊065007

出　　处：《石油实验地质》2010年第6期592-595,共4页Petroleum Geology & Experiment

基　　金：国家科技重大专项(2008ZX05013-003)资助

摘　　要：致密砂岩气藏储层岩石孔隙结构复杂,孔喉细小,气体渗流特征有别于常规气藏。采用逐级增压气驱实验和定容衰竭开采物理模拟实验相结合的方法,测试分析了气体在砂岩储层岩心中的渗流特征。研究表明:气体在致密砂岩储层岩心中有效流动的条件是需要有足够大的流动压差克服沿程摩阻,这也是致密气藏储量得到动用的门槛条件。气相渗流特征受岩心基质渗透率、含水饱和度、岩心长度、上覆压力等多种因素的影响,在致密气藏开发过程中,需要综合考虑这些因素对气井产能及稳产能力的影响。Properties of gas flow in tight gas reservoirs are different from those in conventional gas reservoirs due to complex pore structure and tiny pore throat. Gas drive experiment by increasing pressure progressively and constant depletion physical simulation experiment were used in this paper so as to analyze gas flow characteristics in sandstone reservoir cores. The results indicated that, flow pressure difference enough big was required to overcome friction. This is the threshold for tight gas reservoir development. Gas flow properties are influenced by many factors such as basis permeability, water saturation, core length and overburden pressure. They may influence gas well productivity and rate maintenance capability and should be paid attention to before tight gas reservoir development.

关 键 词：致密岩心 实验研究 影响因素 气体渗流 

分 类 号：TE311[石油与天然气工程—油气田开发工程]