中国石油大学学报（自然科学版）2026，Vol.50Issue(2)：1-12,12.DOI:10.3969/j.issn.1673-5005.2026.02.001
考虑温度和围压效应的升尺度理论岩石力学特性预测模型及验证
Prediction model and validation of upscaled theoretical rock mechanical properties considering the effects of temperature and confining stress
摘要
Abstract
To address key industry challenges in deep-earth engineering such as low core recovery rates,core damage during extraction,and high operational costs,this study proposes a novel upscaling theoretical framework for predicting rock me-chanical properties,incorporating the effects of temperature and confining pressure.The proposed method establishes quanti-tative relationships among mineral composition,mineral-scale mechanical properties,porosity,fracture characteristics,and macroscopic mechanical behavior.By utilizing microscale test data from readily available materials,such as drilling cuttings and borehole wall fragments,the framework enables rapid and reliable prediction of macroscopic mechanical properties in deep formations.The model is applied to two representative ultra-deep lithologies,dolomite and limestone,and its perform-ance is validated through comparison with results from core-based triaxial compression tests.The average prediction errors for elastic modulus are 3.35%for limestone and 9.30%for dolomite,while those for strength are 7.57%for limestone and 6.63%for dolomite.Compared with conventional mechanical models,the proposed approach offers two main advantages.First,it incorporates the effects of temperature and confining pressure on rock porosity,improving its applicability and pre-dictive accuracy under the high-temperature and high-pressure conditions typical of deep-earth environments.Second,it in-tegrates mineralogical and mechanical information derived from drilling cuttings and borehole fragments with fracture charac-terization from well logging data,enabling efficient and high-precision prediction of macroscopic mechanical properties of deep formations.This study provides a new framework and methodology for estimating the mechanical properties of ultra-deep formations,offering essential support for wellbore stability analysis and reservoir stimulation design.关键词
深地工程/岩石力学参数/升尺度模型/温度/围压Key words
deep earth engineering/rock mechanical parameters/upscaling model/temperature/confining stress分类
建筑与水利引用本文复制引用
王倩,赵建建,杨子轩,翟文宝,杨福见..考虑温度和围压效应的升尺度理论岩石力学特性预测模型及验证[J].中国石油大学学报（自然科学版）,2026,50(2):1-12,12.基金项目
中国石油天然气集团有限公司科学研究与技术开发项目(2022ZG06) （2022ZG06）
国家自然科学基金项目(52309147,42507261) （52309147,42507261）
湖北省重点研发项目(2025BEB014) （2025BEB014）
