Skip to main content

Research Repository

Advanced Search

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

Lan, Haoxiang; Guo, Min; Fu, Meiyan; Deng, Hucheng; Gluyas, Jon; Xu, Wang; Tang, Mingyuan; Wu, Dong; Li, Yilin; Guo, Hengwei

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 Thumbnail


Authors

Haoxiang Lan

Min Guo

Meiyan Fu

Hucheng Deng

Wang Xu

Mingyuan Tang

Dong Wu

Yilin Li

Hengwei Guo



Abstract

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.

Citation

Lan, H., Guo, M., Fu, M., Deng, H., Gluyas, J., Xu, W., …Guo, H. (2023). 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, 10, Article 1089171. https://doi.org/10.3389/fenrg.2022.1089171

Journal Article Type Article
Acceptance Date Dec 12, 2022
Online Publication Date Jan 6, 2023
Publication Date 2023
Deposit Date May 31, 2023
Publicly Available Date Jun 6, 2023
Journal Frontiers in Energy Research
Publisher Frontiers Media
Peer Reviewed Peer Reviewed
Volume 10
Article Number 1089171
DOI https://doi.org/10.3389/fenrg.2022.1089171

Files

Published Journal Article (4.3 Mb)
PDF

Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.





You might also like



Downloadable Citations