Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement Experiments
Understanding the electrical characteristics of carbonate formation and accurately determining the electrical parameters (cementation exponent m and saturation exponent n in Archie equation) are very important for carbonate formations evaluation. However, the study of electrical characteristics face...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2019-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/15/e3sconf_sca2018_01003.pdf |
| _version_ | 1818410923284496384 |
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| author | Kewen Wang Ning Li Hongliang Wu Gong Zhang Zhou Feng jun Yu |
| author_facet | Kewen Wang Ning Li Hongliang Wu Gong Zhang Zhou Feng jun Yu |
| author_sort | Kewen Wang |
| collection | DOAJ |
| description | Understanding the electrical characteristics of carbonate formation and accurately determining the electrical parameters (cementation exponent m and saturation exponent n in Archie equation) are very important for carbonate formations evaluation. However, the study of electrical characteristics faces great challenge because of the variable pore types, the complicated pore structure and the big heterogeneity in carbonates. We selected representative carbonate cores to carry out experiment research based on newly developed technologies in digital core analysis and resistivity test. Three types of cores were selected: the void space is mainly intergranular and intercrystalline; the vugs are developed; the fractures are developed. Firstly, the porosity and permeability of the selected cores have been tested. Then micro-CT with high resolution is used to scan the cores and NMR T2 spectrums of the cores both in water-saturated state and in bound water state are obtained. Finally, the resistivity of the cores in different water saturation is tested by using gas displacement technology. The analysis results of the experimental data show that the intergranular and intercrystalline pore and the fracture both have great influence on R0 while the influence of secondary vug on R0 is slight. Cementation exponent m and saturation exponent n have great difference between different cores and there is no obvious relation between m, n and reservoir parameters (φ or K). However, if we classify the cores based on the pore type, and the values of both m and n have good relationship with bound water saturation. |
| first_indexed | 2024-12-14T10:23:14Z |
| format | Article |
| id | doaj.art-986a6bae1e17418c9aa918f9998fdfe0 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-14T10:23:14Z |
| publishDate | 2019-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-986a6bae1e17418c9aa918f9998fdfe02022-12-21T23:06:29ZengEDP SciencesE3S Web of Conferences2267-12422019-01-01890100310.1051/e3sconf/20198901003e3sconf_sca2018_01003Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement ExperimentsKewen WangNing LiHongliang WuGong ZhangZhou Fengjun YuUnderstanding the electrical characteristics of carbonate formation and accurately determining the electrical parameters (cementation exponent m and saturation exponent n in Archie equation) are very important for carbonate formations evaluation. However, the study of electrical characteristics faces great challenge because of the variable pore types, the complicated pore structure and the big heterogeneity in carbonates. We selected representative carbonate cores to carry out experiment research based on newly developed technologies in digital core analysis and resistivity test. Three types of cores were selected: the void space is mainly intergranular and intercrystalline; the vugs are developed; the fractures are developed. Firstly, the porosity and permeability of the selected cores have been tested. Then micro-CT with high resolution is used to scan the cores and NMR T2 spectrums of the cores both in water-saturated state and in bound water state are obtained. Finally, the resistivity of the cores in different water saturation is tested by using gas displacement technology. The analysis results of the experimental data show that the intergranular and intercrystalline pore and the fracture both have great influence on R0 while the influence of secondary vug on R0 is slight. Cementation exponent m and saturation exponent n have great difference between different cores and there is no obvious relation between m, n and reservoir parameters (φ or K). However, if we classify the cores based on the pore type, and the values of both m and n have good relationship with bound water saturation.https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/15/e3sconf_sca2018_01003.pdf |
| spellingShingle | Kewen Wang Ning Li Hongliang Wu Gong Zhang Zhou Feng jun Yu Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement Experiments E3S Web of Conferences |
| title | Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement Experiments |
| title_full | Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement Experiments |
| title_fullStr | Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement Experiments |
| title_full_unstemmed | Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement Experiments |
| title_short | Determination of Electrical Parameters in Carbonates with Micro-CT, NMR and Gas Displacement Experiments |
| title_sort | determination of electrical parameters in carbonates with micro ct nmr and gas displacement experiments |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/15/e3sconf_sca2018_01003.pdf |
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