天然气工业2025，Vol.45Issue(12)：110-124,15.DOI:10.3787/j.issn.1000-0976.2025.12.009
页岩变应力孔隙变形与多相流实验及微观尺度模拟进展与展望
Progress and prospects of experimental and microscale simulation on pore deformation and multiphase flow under variable stress in shale
摘要
Abstract
Pore-throat deformation and stress-sensitive effect induced by effective stress variations during shale gas development are among the primary reasons for the deterioration of gas flow capacity and the accelerated production decline,which are particularly pronounced in deep shale gas reservoirs.Accurately evaluating the alteration of multiphase flow capacity induced by pore deformation in shale reservoirs is of great significance to efficient development and enhanced recovery of shale gas.However,laboratory two-phase displacement experiments under variable effective stress remain difficult to conduct,so it is urgent to seek new research approaches.This paper systematically reviews the mechanical heterogeneity of shale minerals,methods for determining permeability under effective stress variations,and recent progress in multiphase flow simulations.It further identifies current technical bottlenecks and proposes directions for future research.The following results are obtained.First,the Young's modulus of organic matter and clay in shale is significantly lower than that of other minerals.How to characterize the deformation of different pore types under variable effective stress remains a critical challenge.Second,the pressure-pulse decay method can effectively determine gas permeability in shale under variable effective stress,but two-phase displacement experiments are difficult to implement due to long test duration,channeling,measurement uncertainty,and sensitivity to external disturbance.Third,microscale simulations of multiscale pore and fracture closure in shale are scarcely reported,and the closure sequence and degree of different fracture types under variable effective stress remain unexplained.Fourth,regarding the evolution of relative permeability curves within shale matrices under variable effective stress,no consensus has been reached on current multiphase flow simulations,and further investigation is warranted.In conclusion,microscale pore deformation and multiphase flow simulation under variable effective stress represent a frontier yet highly challenging research field.These efforts hold great potential for applications in shale gas CCUS,enhanced recovery,and hydrogen storage,and can provide a solid theoretical foundation and technical support for efficient shale gas development.关键词
页岩/应力敏感/孔隙变形/微观模拟/多相流/技术展望Key words
Shale/Stress-sensitive/Pore deformation/Microscale simulation/Multiphase flow/Prospect分类
能源科技引用本文复制引用
张烈辉,周厚杰,赵玉龙,葛枫,张涛,胡浩然..页岩变应力孔隙变形与多相流实验及微观尺度模拟进展与展望[J].天然气工业,2025,45(12):110-124,15.基金项目
国家自然科学基金优秀青年科学基金项目"页岩气多尺度非线性渗流力学"(编号:52222402)、国家自然科学基金重点基金项目"海相页岩水平井超临界二氧化碳压裂机理与一体化模拟研究"(编号:52234003). （编号:52222402）
