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。