| 核磁共振技术在非常规油气藏的应用基础 |
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| 引用本文： | 杨正明,张亚蒲,李海波,郑兴范,雷启鸿.核磁共振技术在非常规油气藏的应用基础[J].地球科学,2017,42(8):1333-1339. |
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| 作者姓名： | 杨正明 张亚蒲 李海波 郑兴范 雷启鸿 |
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| 作者单位： | 1.中国石油勘探开发研究院, 北京 100083 |
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| 基金项目： | 国家科技重大专项2017ZX05013-001中国石油天然气集团公司重大基础科技攻关课题2014B-1203 |
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| 摘 要： | 核磁共振技术在非常规油气藏应用解释中有较多争议.结合渗流流体的概念，提出了针对核磁共振图谱解释流体动用性质的新方法，并应用于非常规油气藏.研究表明:致密油和致密砂岩气藏岩心的核磁共振图谱左峰和右峰是连续而不是截然分开的，说明难动用流体与易动用流体的性质是连续渐变的，不是独立分开的；而页岩和煤层气藏岩心核磁共振图谱则反之.在非常规油气藏岩心中，难动用流体占主导地位，致密油和致密砂岩气藏岩心的易动用流体多于页岩和煤层气藏岩心.致密油和致密砂岩气藏的采出程度提高取决于易动用流体的采出；而页岩和煤层气藏的采出程度提高则取决于难动用流体的采出.
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| 关 键 词： | 非常规油气藏 核磁共振 流体 采出程度 石油地质 |
| 收稿时间： | 2016-12-20 |
Application Basis of Nuclear Magnetic Resonance Technology in the Unconventional Reservoirs |
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| Abstract: | The application interpretation of nuclear magnetic resonance (NMR) technology in unconventional reservoirs has been very controversial. A new interpretation method of NMR spectrum is proposed and applied to the unconventional reservoirs combining with the concept of seepage fluid. The results show that the left peak and right peak of nuclear magnetic resonance spectrum in tight oil and gas sandstone cores are continuous rather than entirely separated, which indicates that the properties of the differences between the easy-to-produce fluid and the difficult-to-produce fluid is not completely separated. But the nuclear magnetic resonance spectrum of shale and coal bed methane (CBM) reservoir cores is opposite to the above mentioned results. In cores of unconventional reservoirs, the difficult-to-produce fluid dominates, and the easy-to-produce fluid in tight oil and gas sandstone cores is more than that of shale and CBM reservoir cores. The recovery degree of tight oil and gas sandstone reservoirs mainly increases in the easy-to-produce fluid extraction, but the recovery degree of shale and CBM reservoirs mainly increases in the difficult-to-produce fluid extraction. |
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