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南堡凹陷东营组及沙河街组烃源岩的富氢显微组分随着热演化程度的增加，荧光光谱峰波长λｍａｘ值增加，红绿光相对强度比值增大，荧光强度Ｉ５４６降低，且均在埋深３４００ｍ左右出现阶段性变化。因此，可以确定南堡凹陷烃源岩的生油门限深度在３４００ｍ左右。
With the increase of thermal evolution, the fluorescence peak wavelength λmax increases, the relative intensity ratio of red and green light increases, and the fluorescence intensity I546 decreases, and the hydrogen enrichment microscopic composition of source rock of Dongying Formation and Shahejie Formation of Nanpu Sag has increased Are buried in the depth of 3400m or so there are stages of change. Therefore, it can be determined that the source depth of the source rocks in Nanpu Sag is about 3400m.