THERMAL SCIENCE

International Scientific Journal

Jie Wu

,

Jian-Hua Guo

,

Lian-Bin Xia

,

Wei-Zhe Li

,

Zhi-Xiang Cai

,

Yui-Chun Wang

STUDY ON THERMO-MECHANICAL MICROCHARACTERIZATION OF DEEP RESERVOIR ROCKS IN SICHUAN-CHONGQING REGION

ABSTRACT
The macro-mechanical responses of deep geological formations arise from the intrinsic coupling between microstructural attributes and environmental constraints, critically influencing wellbore integrity during deep drilling operations. This investigation systematically examines the thermo-mechanical behavior of Sichuan-Chongqing reservoir rocks through integrated grid nanoindentation mapping, SEM microstructural characterization, and XRD mineralogical analysis. A bimodal mechanical framework was formulated based on mineralogical strength differentiation to quantify thermally induced property alterations. These results elucidate the micro-mechanical evolutionary pathways of deep reservoir rocks under thermal stress, providing critical insights for optimizing wellbore stability prediction models and refining formation risk evaluation protocols in ultra-deep drilling applications.
KEYWORDS
High-temperature treatment, nanoindentation, mechanical properties, Mechanical model
PAPER SUBMITTED: 2025-06-18
PAPER REVISED: 2025-09-01
PAPER ACCEPTED: 2025-09-17
PUBLISHED ONLINE: 2026-07-18
DOI REFERENCE: https://doi.org/10.2298/TSCI250618110W
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Study on thermo-mechanical microcharacterization of deep reservoir rocks in Sichuan-Chongqing region

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