高永利;张志国;

• 1:西安石油大学石油工程学院
• 2:长庆油田公司采油一处

摘要(Abstract)：

针对常规压汞不能准确确定储层孔隙与喉道的弊端,利用恒速压汞技术对鄂尔多斯盆地低渗透砂岩样品孔喉结构的差异性进行了定量评价。结果表明,渗透率越小的岩心,喉道分布越集中,随着渗透率的增大,大喉道分布逐渐增多,喉道分布范围也更加宽泛,主喉道半径随之增大,但较大喉道对低渗透砂岩储层的开采效果具有双重影响;渗透率小于0.5×10-3μm2的岩心,主喉道半径小于1μm,渗透率介于0.5×10-3~1×10-3μm2间的岩心,主喉道半径为1~2μm;孔道与渗透率大小之间基本没有相关性,低渗透砂岩孔喉结构的差异性主要体现在喉道上,喉道大小及分布影响最终开发效果。

关键词(KeyWords)： 恒速压汞;定量评价;低渗透砂岩;孔隙结构差异性;鄂尔多斯盆地

Abstract:

Keywords:

基金项目(Foundation): “十一五”国家科技支撑计划项目(2007BAB17B02)

作者(Author): 高永利;张志国;

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