The Influence of Injected Fluids on Microscopic Pore Structures in the Intersalt Dolomitic Shale Oil Reservoirs
Joint Authors
Yan, Wei
Sun, Ting
Zhou, Tong
Su, Jianzheng
Tang, Xianglu
Tian, Hao
Li, Wenbo
Wang, Kongyang
Wang, Ruyue
Zhang, Rusheng
Niu, Jun
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-11-28
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Given their low porosity and permeability, intersalt dolomitic shale oil reservoirs need to be developed via large-scale hydraulic fracturing to achieve economic effects.
However, various lithologies and salt materials make these reservoirs vulnerable to salt mineral dissolution and recrystallization and salt plugging during development.
This study investigated the variation rules of pore structures, porosity, and permeability of intersalt dolomitic shale oil reservoirs under the influence of hydraulic fracturing fluid.
Correspondingly, a series of experiments (i.e., high-temperature and high-pressure soaking experiments, focused ion beam scanning helium ion microscope analyses, and porosity and pulse permeability tests) is performed on the Qian 34-10 rhythmic intersalt dolomitic shales.
Results show that distilled water dissolves the salt crystals inside the matrix pores to improve the reservoir permeability.
However, the distilled water-rock interaction will cause the massive migration of salt minerals.
By contrast, the supercritical CO2 can disperse salt particles, dredge the channels, and enlarge pores by expansion, but it has an overall weak capability of changing the pore structure and matrix permeability.
To simulate the supercritical CO2 composite fracturing, the mixed solution of supercritical CO2 and distilled water favors the salt dissolution effect in the water-based fracturing fluid and recovery enhancement by CO2.
This solution can remarkably improve the reservoir porosity and permeability and avoid massive salt mineral migration and salt crystallization damage.
This study is theoretically and practically important to the effective and enhanced development of intersalt dolomitic shale oil reservoirs.
American Psychological Association (APA)
Zhou, Tong& Yan, Wei& Su, Jianzheng& Tang, Xianglu& Tian, Hao& Li, Wenbo…[et al.]. 2019. The Influence of Injected Fluids on Microscopic Pore Structures in the Intersalt Dolomitic Shale Oil Reservoirs. Geofluids،Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1153627
Modern Language Association (MLA)
Zhou, Tong…[et al.]. The Influence of Injected Fluids on Microscopic Pore Structures in the Intersalt Dolomitic Shale Oil Reservoirs. Geofluids No. 2019 (2019), pp.1-13.
https://search.emarefa.net/detail/BIM-1153627
American Medical Association (AMA)
Zhou, Tong& Yan, Wei& Su, Jianzheng& Tang, Xianglu& Tian, Hao& Li, Wenbo…[et al.]. The Influence of Injected Fluids on Microscopic Pore Structures in the Intersalt Dolomitic Shale Oil Reservoirs. Geofluids. 2019. Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1153627
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1153627