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对区内原油地球化学特征研究表明，濮深８ 井原油母质来源于混源有机质，属在还原条件下形成的一种高成熟原油。同时指出了沙三段下部的高成熟泥岩为其油源岩，油藏属于自生自储构造油气藏。
The study on the geochemical characteristics of crude oil in the area shows that the crude parent material of Pu deep well 8 is derived from mixed organic matter and is a kind of high mature crude oil formed under reducing conditions. At the same time, it is pointed out that the high mature mudstone in the lower part of the third member of Shahejie formation is its source rock, and the oil reservoir belongs to the self-generative self-storage reservoir.