国家冰川冻土沙漠科学数据中心

元数据

名称	New Insight into the Characteristics of Tight Carbonate based on Nuclear Magnetic Resonance
科技资源标识	CSTR:11738.14.NCDC.XDA14.PP5753.2024
DOI	10.1021/acs.energyfuels.7b03460
数据共享方式	开放下载
摘要	In order to further our understanding of the physical properties of tight carbonate and to explore the use of NMR to identify different rock types, in this study we use thin-section observations, scanning electronic microscopy (SEM), helium porosity, helium pulse decay permeability, mercury injection capillary pressure (MICP), and nuclear magnetic resonance (NMR) to conduct petrographic and petrophysical characteristics studies on 12 carbonate samples. Our results show that nano/micropores are widely distributed between the micrite and/or dolomite crystals. The correlation between the permeability and porosity of the tight carbonates is poor, while the rapex, which is the apex of the hyperbola in Pittman (1992), is well correlated with the threshold entry pressure, the maximum pore-throat radius, and the average pore-throat radius. On the basis of new cutoff values, we have identified three types of pores: nanopores, which mainly correspond to the intercrystalline pores; micropores, which may be related to the bioerosion or mechanical erosion process of the aragonitic bioclasts; and mesopores, which mainly consist of well-preserved intraparticle porosity related to the diagenetic shielding effect, dissolved intragranular pores, and a few intercrystalline pores. The dissolved bioclastic packstone and dolostone exhibit similar unimodal behavior with a broader wave, while each of the other four lithofacies has a unique NMR signature. The microstructures and diagenesis processes result in different NMR responses in the different rock types. Micrite envelope, neomorphism, and moderate recrystallization of the micrite matrices result in a higher T2 spectrum value and a longer relaxation time, while the high clay content and stylolite have the opposite effect. The dissolved bioclastic packstone has a shorter relaxation time than dolostone, with a similar pore throat distribution. Geological knowledge is needed for the NMR-based core-facies classification and for evaluation of the physical properties of the tight carbonate.
学科分类	170.50
关键词	Nuclear Magnetic Resonance Tight Carbonate
作者	Wei Duan,Gao Zhiqian,Fan Tailiang,Meng Miaomiao,Chen Yue,Li Yangbing,and Zhang Chenjia
数据量	13.7 MiB
论文类型：	journal
论文网址：	https://doi.org/10.1021/acs.energyfuels.7b03460
期刊名称：	Energy Fuels
出版时间：	2018-03-15

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数据引用

Wei Duan,Gao Zhiqian,Fan Tailiang,Meng Miaomiao,Chen Yue,Li Yangbing,and Zhang Chenjia. New Insight into the Characteristics of Tight Carbonate based on Nuclear Magnetic Resonance. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP5753.2024.

许可协议

本作品采用知识共享署名 4.0 国际许可协议进行许可。

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项目信息详情

项目名称：深层油气形成与分布预测
项目编号：XDA14010000
项目类别：中国科学院战略性先导科技专项（A类）