大庆石油地质与开发2026，Vol.45Issue(5)：59-69,11.DOI:10.19597/J.ISSN.1000-3754.202507020
页岩油储层微观动态应力敏感性及渗流响应特征
Micro-dynamic stress sensitivity and flow response characteristics of shale oil reservoirs
摘要
Abstract
In order to clarify micro-dynamic stress sensitivity and flow response characteristics of shale oil reser-voirs,dynamic stress sensitivity experiments during pressurization and energy replenishment,and depressurization production are conducted based on online nuclear magnetic resonance(NMR)technology,quantitatively analyzing the dynamic stress sensitivity and flow evolution characteristics of pores at different micro-scale levels during vari-ous development stages.The results indicate that,the pore dynamic increase of micron-scale pores-fractures in shale oil reservoirs reaches 11.70%～13.24%during pressurization and energy replenishment,while sub-micron pores shows a trend of decreasing first and then increasing.During depressurization production,the pore dynamic decline of micron-scale pores-fractures is more significant,exhibiting the highest dynamic stress sensitivity,with a decrease of 6.53%～7.14%.The decrease in shale flow capacity is negatively correlated with the initial permeability.The process of shale pressurization and energy replenishment can be divided into 2 stages,including elastic closure of partial large pore throats with low injection volume,and rapid expansion of micro-fractures and the recovery of micro-pore throats with high injection volume.The gradual closure of elastic pore throats and micro-fracture flow channels during depressurization production is the key factor for significant reduction of flow capacity.The research provides a reference for efficient development of shale oil.关键词
页岩油/应力敏感性/核磁共振/渗流响应特征/物理模拟/采收率Key words
shale oil/stress sensitivity/NMR/flow response characteristics/physical simulation/oil recov-ery分类
天文与地球科学引用本文复制引用
张磊,杜猛,代军,祁丽莎,万青山,刘红现,杨正明..页岩油储层微观动态应力敏感性及渗流响应特征[J].大庆石油地质与开发,2026,45(5):59-69,11.基金项目
国家科技重大专项"低渗-超低渗油藏有效开发关键技术"(2017ZX05013) （2017ZX05013）
中国石油天然气集团有限公司重大科技专项"利用大型油气藏埋存二氧化碳关键技术标准研究与应用"(2023YFF0614100). （2023YFF0614100）
