石油实验地质2011，Vol.33Issue(2)：206-211,214,7.
基于恒速压汞技术的特低-超低渗砂岩储层微观孔喉特征
Pore throat characteristics of extra-ultra low permeability sandstone reservoir based on constant-rate mercury penetration technique
摘要
Abstract
Based on constant-rate mercury penetration technique, micro pore throat characteristics of extra- ultra low permeability sandstone reservoir of the Yangchang Formation in the Ordos Basin were analyzed, and the alterations of pore throat characteristic parameters were also quantitatively characterized. Pore radiuses were similar, usually 100～200 μm, and the peak values were about 140 μm. Compared to those in the extra-low permeability reservoir, distribution ranges of throat in the ultra-low permeability reservoir were narrow. Throats less than 1 μm accounted for large amount, and were more sensitive to permeability. Distribution ranges of pore throat radius ratio were wide and permeability had big influence on input mercury saturation of throat in ultra-low permeability reservoir. The differences of pore throat characteristics between extra- and ultra- low permeability sandstone reservoir mainly lay in throats. 3 variation periods were identified on overall capillary pressure curves. Each period was affected by pore or throat in different extent due to different permeability. Throats should be focused on in the ultra-low permeability reservoir during the middle and latter stages.关键词
孔喉特征/储层品质/恒速压汞/特低一超低渗砂岩储层/鄂尔多斯盆地Key words
pore throat characteristics/ reservoir quality/ constant-rate mercury penetration/ extraultra low permeability sandstone reservoir/ Ordos Basin分类
能源科技引用本文复制引用
高辉,解伟,杨建鹏,张创,孙卫..基于恒速压汞技术的特低-超低渗砂岩储层微观孔喉特征[J].石油实验地质,2011,33(2):206-211,214,7.基金项目
"十一五"国家科技支撑计划项目(2007BAB17B02)和陕西省教育厅2010年科学研究计划项目(2010JK778)资助. （2007BAB17B02）
