李帅;杨胜来;王爽;高鑫远;张政;焦宝;于家义;

• 1:中国石油大学油气资源与探测国家重点实验室
• 2:长庆油田分公司第五采油厂
• 3:吐哈油田分公司勘探开发研究院

摘要(Abstract)：

为探究三塘湖盆地条湖组致密沉凝灰岩储层孔隙结构、流体可动性及二者关系，对井下真实岩心开展了多项孔隙结构及流体可动性的测试实验。研究表明：致密沉凝灰岩由凝灰质、方解石和石英组成，基本不含黏土矿物。岩石孔隙类型包括构造缝、气泡状结构和基质微孔，其中基质微孔为主要的孔隙类型；岩石孔隙分布较为集中，分选性良好，分布最多的孔隙半径是0.063 0μm,但对渗透率贡献最大的孔隙半径是0.1μm,孔隙的毛管滞留效应明显。岩心平均可动流体饱和度为50.81%,可动孔喉半径下限和有效渗流孔喉半径下限分别为0.049 8μm和0.063 0μm。基质水驱可动压力梯度下限为7.25 MPa/m。致密沉凝灰岩储层流体可动性差的根本原因是储层孔隙尺度太小。

关键词(KeyWords)： 孔隙结构;流体可动性;沉凝灰岩油藏

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金“致密油储层基质渗吸规律与原油动用机理研究”(51574257)

作者(Authors): 李帅;杨胜来;王爽;高鑫远;张政;焦宝;于家义;

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