The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos Basin
The meteoric water has obviously changed the physical properties of dolostone reservoirs in the vertical vadose zone and the horizontal phreatic zone, but its influence on the dolostone reservoirs in the shallow burial zone beneath the phreatic surface is still unclear. This study aims to reveal the...
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2022.1089171/full |
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| author | Haoxiang Lan Min Guo Min Guo Meiyan Fu Meiyan Fu Hucheng Deng Hucheng Deng Jon Gluyas Wang Xu Wang Xu Mingyuan Tang Dong Wu Dong Wu Yilin Li Hengwei Guo |
| author_facet | Haoxiang Lan Min Guo Min Guo Meiyan Fu Meiyan Fu Hucheng Deng Hucheng Deng Jon Gluyas Wang Xu Wang Xu Mingyuan Tang Dong Wu Dong Wu Yilin Li Hengwei Guo |
| author_sort | Haoxiang Lan |
| collection | DOAJ |
| description | The meteoric water has obviously changed the physical properties of dolostone reservoirs in the vertical vadose zone and the horizontal phreatic zone, but its influence on the dolostone reservoirs in the shallow burial zone beneath the phreatic surface is still unclear. This study aims to reveal the effect of meteoric water on the dolostone reservoirs in the shallow burial zone through X-ray diffraction, cathodoluminescence, C, O, and Sr isotope using the sample from Majiagou Formation in the Daniudi gas field, Ordos Basin. The diagenesis and paragenesis of the Ma 55 submember were identified and interpreted through petrological study, combined with data from electron probe, X-ray diffraction analysis, and geochemical parameters of diagenetic minerals. The color of the very fine crystalline dolomite under the cathodeluminescence is dark red and red. The order degree of dolomite ranges from 0.54 to 0.91, showing the origin of early seepage-reflux dolomitization. There are a large number of different calcite cements as fills within the pores and fractures. The color of the calcite cement under the cathodoluminescence is orange-yellow, with a zonal structure. Hydrothermal fluid during late diagenesis could be identified by the authigenic fluorite filling in the fractures. According to the assembly of diagenetic minerals, the very fine crystalline dolostones have experienced the seepage-reflux dolomitization, meteoric water dissolution, shallow burial cementation and late cementation. The void spaces of the very fine crystalline dolostones are intercrystalline pores and microfractures. Although a large number of dissolved pores and caves developed in the period of meteoric water dissolution, these caves and dissolved pores has been mostly filled by multi-stages of cementation. Therefore, the effect of meteoric water on dolostone reservoirs in the shallow burial zone beneath the phreatic surface is not obvious. The main controlling factor for the quality of dolostone reservoir was dolomitization. This study provides a new understanding of the influence of meteoric water on reservoir quality in the shallow burial zone during the paleokarst period. |
| first_indexed | 2024-04-11T00:38:48Z |
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| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-04-11T00:38:48Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
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| spelling | doaj.art-0eff816ea87e4ceda4520b320032fe132023-01-06T13:13:02ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-01-011010.3389/fenrg.2022.10891711089171The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos BasinHaoxiang Lan0Min Guo1Min Guo2Meiyan Fu3Meiyan Fu4Hucheng Deng5Hucheng Deng6Jon Gluyas7Wang Xu8Wang Xu9Mingyuan Tang10Dong Wu11Dong Wu12Yilin Li13Hengwei Guo14College of Energy, Chengdu University of Technology, Chengdu, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, ChinaDepartment of Earth Science, Durham University, Durham, United KingdomCollege of Energy, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, ChinaExploration and Development Research Institute of North China Oil and Gas Company, Zhengzhou, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, ChinaCollege of Energy, Chengdu University of Technology, Chengdu, ChinaThe meteoric water has obviously changed the physical properties of dolostone reservoirs in the vertical vadose zone and the horizontal phreatic zone, but its influence on the dolostone reservoirs in the shallow burial zone beneath the phreatic surface is still unclear. This study aims to reveal the effect of meteoric water on the dolostone reservoirs in the shallow burial zone through X-ray diffraction, cathodoluminescence, C, O, and Sr isotope using the sample from Majiagou Formation in the Daniudi gas field, Ordos Basin. The diagenesis and paragenesis of the Ma 55 submember were identified and interpreted through petrological study, combined with data from electron probe, X-ray diffraction analysis, and geochemical parameters of diagenetic minerals. The color of the very fine crystalline dolomite under the cathodeluminescence is dark red and red. The order degree of dolomite ranges from 0.54 to 0.91, showing the origin of early seepage-reflux dolomitization. There are a large number of different calcite cements as fills within the pores and fractures. The color of the calcite cement under the cathodoluminescence is orange-yellow, with a zonal structure. Hydrothermal fluid during late diagenesis could be identified by the authigenic fluorite filling in the fractures. According to the assembly of diagenetic minerals, the very fine crystalline dolostones have experienced the seepage-reflux dolomitization, meteoric water dissolution, shallow burial cementation and late cementation. The void spaces of the very fine crystalline dolostones are intercrystalline pores and microfractures. Although a large number of dissolved pores and caves developed in the period of meteoric water dissolution, these caves and dissolved pores has been mostly filled by multi-stages of cementation. Therefore, the effect of meteoric water on dolostone reservoirs in the shallow burial zone beneath the phreatic surface is not obvious. The main controlling factor for the quality of dolostone reservoir was dolomitization. This study provides a new understanding of the influence of meteoric water on reservoir quality in the shallow burial zone during the paleokarst period.https://www.frontiersin.org/articles/10.3389/fenrg.2022.1089171/fullMajiagou FormationOrdos Basinkarstificationshallow burial zonedolomitization |
| spellingShingle | Haoxiang Lan Min Guo Min Guo Meiyan Fu Meiyan Fu Hucheng Deng Hucheng Deng Jon Gluyas Wang Xu Wang Xu Mingyuan Tang Dong Wu Dong Wu Yilin Li Hengwei Guo The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos Basin Frontiers in Energy Research Majiagou Formation Ordos Basin karstification shallow burial zone dolomitization |
| title | The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos Basin |
| title_full | The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos Basin |
| title_fullStr | The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos Basin |
| title_full_unstemmed | The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos Basin |
| title_short | The effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone: A case study of the Ma55 submember of Majiagou Formation in Ordos Basin |
| title_sort | effect of meteoric water on the very fine crystalline dolomite reservoir in the shallow burial zone a case study of the ma55 submember of majiagou formation in ordos basin |
| topic | Majiagou Formation Ordos Basin karstification shallow burial zone dolomitization |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2022.1089171/full |
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