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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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恒速与恒压压汞差异及其在储层评价中的应用
Keywords: 压汞,实验,比较,毛管压力,孔隙结构,储层评价,致密砂岩
Abstract:
？阐述了恒速压汞和恒压压汞的原理方法，通过实际岩样的测试分析，比较了2种不同方法的优缺点和适用范围，分析了实验压力对实验结果的影响。恒压压汞测试速度快、实验压力高、可测试孔隙介质的孔径范围广，适宜于大量的生产及科研样品测试；恒速压汞测试速度非常慢，可区分给出孔隙与喉道的不同参数，能更加精确地表征多孔介质的孔隙结构，但目前恒速压汞仪的实验压力相对较低，可测试样品的孔径范围有限，对致密岩样测试获取的参数信息不全面。建议研究者在选用不同方法时，需要提前了解岩样的孔隙分布范围，确定合理的实验压力，一般来说，致密砂岩基质渗透率低于1×10-3μm2以下，对恒速压汞就应慎重使用，而进行恒压压汞时则应增大实验压力，以获得更具代表性的孔隙特征参数。
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