岩矿测试2026，Vol.45Issue(1)：131-141,11.DOI:10.15898/j.ykcs.202506230181
高温作用对过高成熟度富有机质页岩储层改造规律的认识:来自物理实验的证据
Insights into the Transformation Patterns of Overmature,Organic-Rich Shale Reservoirs under High-Temperature Conditions:Evidence from Physical Experiments
摘要
Abstract
The efficient development of shale oil and gas is crucial for China's energy security.Shale exhibits characteristics such as well-developed bedding planes,strong heterogeneity,low porosity,and low permeability.Previous studies have demonstrated that high-temperature thermal treatment can damage the internal structure of shale,serving as an important method for horizontal well stimulation and effectively enhancing shale oil and gas production.However,the high-temperature damage mechanisms in over-mature shale remain unclear,and the optimal reservoir stimulation temperature has yet to be determined.This study focuses on over-mature organic-rich shale from the Niutitang Formation in Hunan Province,employing scanning electron microscopy,low-temperature gas adsorption,and high-pressure mercury intrusion porosimetry as research methods to investigate the pore evolution patterns of over-mature shale under high-temperature conditions and reveal its high-temperature damage mechanisms.The findings indicate that the pore structure distribution of over-mature shale exhibits multi-stage changes with temperature.Influenced by rock deformation and mineral composition,the micropore volume of over-mature shale reaches its maximum after high-temperature treatment at 600℃but decreases as the temperature continues to rise.After treatment at 400-500℃,the mesopore volume and specific surface area undergo significant increases,followed by a notable decline,while the specific surface area reaches a minimum at 600℃,suggesting the existence of an optimal temperature range(500-600℃)that maximizes mesopore development.With increasing temperature,the fractal dimension of macropores approaches 2,displaying regular morphology and favorable connectivity between pores.Therefore,the optimal stimulation temperature for over-mature shale lies within the range of 500-600℃,maximizing pore volume and specific surface area development,thereby providing essential migration pathways for shale oil and gas production.This research offers theoretical guidance for high-temperature stimulation of over-mature shale.关键词
高温作用/流体注入/气体吸附/分形理论/水平井改造Key words
high temperature effect/fluid injection/gas adsorption/fractal theory/horizontal well modification分类
天文与地球科学引用本文复制引用
李洋冰,陈建奇,胡维强,柳雪青,马立涛,李盼盼,李晨晨..高温作用对过高成熟度富有机质页岩储层改造规律的认识:来自物理实验的证据[J].岩矿测试,2026,45(1):131-141,11.基金项目
国家重大专项课题(2024ZD1404700) （2024ZD1404700）
中海油能源发展股份有限公司工程技术分公司科研项目(SSKJ-CG-GJ-2025-14) （SSKJ-CG-GJ-2025-14）
