Pressure-regulated pore structure evolution and dielectric performance enhancement in MgO/epoxy composite systems

Petroleum Science 2026 Open access

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Authors: Hongliang Zhang, Shu-Xuan Li, Si-Liang Du, Ying-Xin Zhang, Su-Fang Li, Hai Jin, Yao-Min Liu, Tao Wu
DOI: 10.1016/j.petsci.2026.02.024
Cited by: 0
References: 32

Abstract

With the surging demand for unconventional oil and gas extraction, the insulation performance of downhole high-power electric heaters has become a critical bottleneck limiting long-term stable operation. The MgO/epoxy system is an ideal option for end-sealing materials, yet the mechanism underlying the formation of cascading discharge paths and the insulation failure threshold under extreme conditions, such as in enclosed environments and micrometer-scale gap arrays (

Fields of Study & Subjects

High voltage insulation and dielectric phenomena Magnesium Oxide Properties and Applications Advanced ceramic materials synthesis

Publication details

Journal / source
Petroleum Science
Volume
23
Issue
6
Pages
3320–3333
Publication date
3 March 2026
Language
EN