【摘 要】
：
低场核磁共振实验已经在岩心分析领域广泛应用，但由于岩心孔隙尺寸相对较小，常规低场核磁共振成像方法难以实现.Spiral成像是一种快速成像技术，同时通过提高空间分辨率，该方法能够采集到较短的弛豫信号.利用Spiral成像技术，通过增加累加次数提高信噪比，实现低孔隙度岩心核磁成像.该方法有助于研究低孔隙度岩心孔隙非均质性及原始岩样的流体分布.本文实验使用纽迈MesoMR23-060H-1核磁仪器，主频
【机 构】
：
中国石油大学(华东),山东青岛,266580
【出 处】
：
第八届全国低场核磁共振技术与应用研讨会
论文部分内容阅读
低场核磁共振实验已经在岩心分析领域广泛应用，但由于岩心孔隙尺寸相对较小，常规低场核磁共振成像方法难以实现.Spiral成像是一种快速成像技术，同时通过提高空间分辨率，该方法能够采集到较短的弛豫信号.利用Spiral成像技术，通过增加累加次数提高信噪比，实现低孔隙度岩心核磁成像.该方法有助于研究低孔隙度岩心孔隙非均质性及原始岩样的流体分布.本文实验使用纽迈MesoMR23-060H-1核磁仪器，主频21MHz.图1为Spiral成像和常规成像对饱和水煤样扫描的结果.常规成像方法较难探测低孔隙度岩心信号，而Spiral成像效果较好，能够对饱和水岩心研究孔隙非均质性.图2为Spiral成像对两块密闭取心页岩样品扫描结果，直观认识原始岩样的流体分布状态.
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