地质科学2026，Vol.61Issue(3)：873-882,10.DOI:10.12017/dzkx.2026.059
准噶尔盆地中佳地区佳木河组孔隙结构表征与分类评价
Characterization and classification evaluation of pore structure of Jiamuhe Formation in Zhongjia area,Junggar Basin
摘要
Abstract
The reservoirs of the Permian Jiamuhe Formation in the Zhongjia area of the Junggar Basin are tight,where the cores are prone to fracturing due to zeolite expansion,resulting in distorted physical property data,which makes it difficult to characterize and evaluate the complex pore structures.Under the guidance of reservoir geology,qualitative and quantitative characterization of pore structures was conducted using data from casting thin sections,bulk-rock analysis,physical properties,computed tomography and high-pressure mercury intrusion.After excluding mercury intrusion data related to artificial fractures,pore throat radius and homogeneity coefficient were identified as effective parameters for characterizing pore structures and were thus selected for classification evaluation.The results show that most mercury intrusion curves exhibit an upward trend,with pore throat distributions showing"bimodal"or"unimodal"shapes.The main pore throat radius is 1.43 μm,indicating a dominance of mesopores.The main flow space accounts for 24.98％on average,less than a quarter of the total pore space.The homogeneity coefficient ranges from 0.06 to 0.37,reflecting strong heterogeneity in pore structure.Pore structures are classified into three types,with type Ⅲ being the most abundant.Reservoirs with type Ⅱ and Ⅲ pore structures are potential targets for development.关键词
孔隙结构/主要孔喉半径/主要流动空间/均质系数/佳木河组/致密储层Key words
Pore structure/Main pore throat radius/Main flow space/Homogeneity coefficient/Jiamuhe Formation/Tight reservoir分类
天文与地球科学引用本文复制引用
兰浩,陈河青,屈怀林,徐苗苗,韩祺耀,王启金,冯光泽,辛页学,于景维..准噶尔盆地中佳地区佳木河组孔隙结构表征与分类评价[J].地质科学,2026,61(3):873-882,10.基金项目
新疆维吾尔自治区天山英才项目(编号:2023TSYCJC0010)和克拉玛依市创新人才项目(编号:2025DB0156)资助 （编号:2023TSYCJC0010）
