Diagenesis Evolution and Pore Types in Tight Sandstone of Shanxi Formation Reservoir in Hangjinqi Area, Ordos Basin, Northern China

Yue Zhang, Jingchun Tian, Xiang Zhang, Jian Li, Qingshao Liang and Xiaoyu Zheng
Additional contact information
Yue Zhang: Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
Jingchun Tian: Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
Xiang Zhang: Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
Jian Li: College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
Qingshao Liang: Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
Xiaoyu Zheng: Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China

Energies, 2022, vol. 15, issue 2, 1-16

Abstract: Diagenesis and pore evolution of tight sandstone reservoir is one of the most important issues surrounding clastic reservoirs. The tight sandstone of the Shanxi Formation is an important oil and gas producing layer of the Upper Paleozoic in Ordos Basin, and its densification process has an important impact on reservoir quality. This study determined the physical properties and diagenetic evolution of Shanxi Formation sandstones and quantitatively calculated the pore loss in the diagenetic process. Microscopic identification, cathodoluminescence, and a scanning electron microscope were used identify diagenesis, and the diagenesis evolution process was clarified along with inclusion analysis. In addition, reservoir quality was determined based on the identification of pore types and physical porosity. Results show that rock types are mainly sublitharenite and litharenite. The reservoir has numerous secondary pores after experiencing compaction, cementation, and dissolution. We obtained insight into the relationship between homogenous temperature and two hydrocarbon charges. The results indicated that there were two hydrocarbon charges in the Late Triassic–Early Jurassic (70–90 °C) and Middle Jurassic–Early Cretaceous (110–130 °C) before reservoir densification. The quantitative calculation of pore loss shows that the average apparent compaction, cementation, and dissolution rates are 67.36%, 22.24%, and 80.76%, respectively. Compaction directly affected the reservoir tightness, and intense dissolution was beneficial to improve the physical properties of the reservoir.

Keywords: tight sandstone reservoir; diagenesis; densification; pore evolution; diagenetic evolution (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: Add references at CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/2/470/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/2/470/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:2:p:470-:d:721419

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().