根据铸体薄片、扫描电镜、电子探针、X-衍射分析，对塔河油田AT1 区三叠系中油组储层成岩作用特征及其对物性影响进行了系统研究。认为该区三叠系中油组成分成熟度及结构成熟度较低，储层成岩后生作用复杂多变，现今主要处于晚成岩A 期；压实作用是减少孔隙度的主要方式，溶蚀作用对孔隙度的增大有积极意义。

Based on cast thin section, scanning electron microscope, electron microprobe and X- diffraction analysis, the diagenesis of Triassic Zhongyou Formation and its influence on physical properties in Tahe oilfield are studied. It is believed that Zhongyou Formation has lowcompositional maturity and textural maturity. The reservoir is mainly at late disgenesis stage A with complicated epidiagenesis. Compaction can reduce the porosity, while denudation is constructive to the increase of porosity.