Study on sell logging and core analysis shows that fine lithology and complicate pore structure are main reason for micropores development of reservoirs , causing ultra - high irreducible water saturation 摘要对曲堤油田测井、录井、岩心分析等资料的研究分析表明,岩性细、孔隙结构复杂,造成储层的微孔隙发育,进而导致束缚水饱和度极高是该油田形成低阻油层的主要成因。