Document Type
Journal Article
Publication Title
Capillarity
Volume
10
Issue
1
First Page
12
Last Page
21
Publisher
Yandy Scientific Press
School
Centre for Sustainable Energy and Resources
RAS ID
64523
Funders
National Natural Science Foundation of China / Natural Science Foundation of Sichuan Province / Open Found of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
Abstract
Fractional wettability is common in oil and gas reservoirs, resulting in complex fluid distribution and transport phenomena. A precise understanding of capillary pressure behavior and characterization in fractional-wet reservoirs, including the two-phase flow mechanisms within pores and relationship between capillary pressure and saturation in porous media, is significant to enhanced oil recovery strategies. In this paper, an in-depth review of the two-phase flow mechanisms in fractional-wet pores and capillary entry pressures in various displacement processes was conducted. Furthermore, the effects of oil-wet proportion and contact angle on capillary pressure characterization were summarized, highlighting the emergence of similar capillary pressure curves under conditions of low oil-wet proportions. The prediction models for capillary pressure, containing empirical equations and physics-based models were discussed, with the aim of clarifying the most effective prediction methodologies. Finally, the review was finalized by outlining key findings and future directions for both experimental and theoretical studies in the realm of capillary pressure behavior and characterization.
DOI
10.46690/capi.2024.01.02
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Comments
Xiao, Y., You, Z., Wang, L., & Du, Z. (2024). A critical review of capillary pressure behavior and characterization in fractional-wet reservoirs. Capillarity, 10(1), 12-21. https://doi.org/10.46690/capi.2024.01.02