THERMAL SCIENCE

International Scientific Journal

Jie Li

,

Peiyao Zhou

,

Jingfeng Dong

,

Haizhu Wang

,

Bin Wang

,

Gensheng Li

,

Ganghua Tian

,

Guoxin Zhang

EXPERIMENTAL STUDY OF SELF-SUPPORTING PROPERTIES OF SUPERCRITICAL CO2-INDUCED FRACTURES

ABSTRACT
In this paper, CO2 fracturing experiments were carried out in a conglomerate to analyze the fracture morphology, and fracture surface characteristics, and discuss the fracture self-support mechanism. Results indicate that compared to supercritical CO2 (SC-CO2) fracturing, SC-CO2 shock fracturing can break through the limitations of in situ stress to develop more complex fractures. The SC-CO2 shock fracturing induced rougher fracture surfaces. As a direct result, rougher fractures with larger apertures have greater permeability and conductivity, approximately three times that of SC-CO2 fracturing. This is because, under the influence of impact, shear misalignment allows rough fracture surfaces to self-support and exfoliated particles to act as proppant, allowing SC-CO2 fracturing to form self-supported fractures with greater aperture and permeability.
KEYWORDS
conglomerate, SC-CO2 fracturing, surface characteristics, self-supporting
PAPER SUBMITTED: 2024-03-20
PAPER REVISED: 2024-03-29
PAPER ACCEPTED: 2024-05-10
PUBLISHED ONLINE: 2024-09-28
DOI REFERENCE: https://doi.org/10.2298/TSCI2404541L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 4, PAGES [3541 - 3546]
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PDF VERSION [DOWNLOAD]
Experimental study of self-supporting properties of supercritical CO2-induced fractures

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence