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长庆致密碎屑岩储集层应力敏感性分析
引用本文:石玉江,孙小平.长庆致密碎屑岩储集层应力敏感性分析[J].石油勘探与开发,2001,28(5):85-87.
作者姓名:石玉江  孙小平
作者单位:长庆油田公司勘探开发研究院
摘    要:使用CMS-300岩心自动分析仪,定量研究了长庆气田上古生界致密碎屑岩天然气储集层的应力敏感性,结果表明岩心分析孔隙度、渗透率(y)与净覆压(x)的关系符合通常的幂指数函数模式(y=a/xm),不同岩样的回归指数(m)和系数(a)高度相关;一般地层条件下的分析渗透率为地面渗透率的5%~80%,而孔隙度绝对值平均降低了0.4%;岩石应力敏感性的强弱与基础的岩性、物性有关,一般岩屑砂岩和含泥砂岩比石英砂岩强,砾岩比砂岩强,低渗透砂岩比高渗透砂岩强.图3表2参1(石玉江摘)

关 键 词:鄂尔多斯盆地  上古生界  致密碎屑岩  储集层  应力敏感性  油气地质
修稿时间:2001年2月20日

Stress sensitivity analysis of Changqing tight clastic reservoir
SHI Yu-jiang and SUN XiaoPing.Stress sensitivity analysis of Changqing tight clastic reservoir[J].Petroleum Exploration and Development,2001,28(5):85-87.
Authors:SHI Yu-jiang and SUN XiaoPing
Affiliation:SHI Yu-jiang, et al.
Abstract:Stress sensitivity of Changqing tight clastic gas reservoir is studied quantitatively by CMS-300, which is a auto core analysis instrument. The results indicate that :(1)The relationship between stress(independent variable,x) and permeability /porosity (dependent variable, y) is extremely accord with exponent function mode, which is y=a/x~m and a is highly related to m with different core samples; (2)Commonly,the permeability in formation condition is 5%-80% of that in surface condition,for porosity, the value averagely decreases 0.4%; (3)The stress sensitivity is related to lithological and physical propert ies; generally, litharenite sands tone is more sensitive than quartzy sandstone, conglomerate than sand and the lo w permeability than the high permeability.
Keywords:Changqing gas field  Low permeability reservoir  Stress analysis  Sensitivity  Core analysis  Analysis instrument  
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