Study on Solid Liquid Flow Characteristics and Mixing Efficiency of Carbon Dioxide Fracturing Sand Mixing System

DOI

10.2991/978-94-6463-902-5_3How to use a DOI?

Keywords

Carbon dioxide fracturing; simulation; structural design; solid-liquid analysis; sand mixing efficiency

Abstract

CO₂ dry sand fracturing is a dry fracturing technology that uses liquid CO₂ as the fracturing fluid. Compared with water-based fracturing fluids, liquid CO₂ fracturing fluid has the advantages of less damage to the reservoir, a stronger ability to support fractures, and higher flowback efficiency. The liquid CO₂ dry fracturing technology has promoted the new development of fracturing technology and laid the foundation for the new development of oil and gas engineering applications. However, liquid CO₂ has problems such as poor sand carrying capacity, fast filtration, difficulty in achieving high sand ratio and uniform sand mixing, and requires low temperature and pressure to maintain phase stability during use. Therefore, CO₂ dry fracturing technology requires the installation of a closed sand mixing device to improve the sand mixing efficiency of liquid CO₂, increase the sand content in the fracturing fluid, improve the fracture support rate and formation conductivity of the fracturing sand fluid filling underground oil layers, and ultimately achieve an increase in oil and gas productivity and ultimate recovery rate. This article analyzes the solid-liquid flow characteristics and sand mixing efficiency of the carbon dioxide fracturing sand mixing system and conducts indoor experiments. The conclusions obtained can be directly used for sand mixing system design and have strong guiding significance for engineering applications.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Shuai Li
AU  - Weiping Lv
AU  - Gao Yang
AU  - Bin Ren
PY  - 2025
DA  - 2025/12/16
TI  - Study on Solid Liquid Flow Characteristics and Mixing Efficiency of Carbon Dioxide Fracturing Sand Mixing System
BT  - Proceedings of the 2025 7th International Conference on Civil Engineering, Environment Resources and Energy Materials (CCESEM 2025)
PB  - Atlantis Press
SP  - 12
EP  - 26
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-902-5_3
DO  - 10.2991/978-94-6463-902-5_3
ID  - Li2025
ER  -