为了研究方正断陷油气成藏规律，基于源岩和盖层的发育及分布特征，从二者空间匹配关系入手， 对该断陷油气成藏与分布的控制作用进行了研究。 结果表明：方正断陷主要发育 2 类 5 套源盖空间匹 配关系，其中自源自盖型 2 套，主要发育于新安村+乌云组；下源上盖型 3 套，主要发育新安村+乌云组 至宝二段。 Ⅰ和 Ⅲ 套源盖空间匹配关系在整个断陷均有分布，Ⅱ 和 Ⅴ 套仅分布于断陷东部，Ⅳ 套仅分 布于断陷西部。 5 套源盖空间匹配关系对油气成藏与分布的控制作用主要表现在 3 个方面，分别为源盖 空间匹配关系的数量控制着油气聚集与分布的层位， 同一层位源盖空间匹配关系的数量控制着油气聚 集的数量以及源盖空间匹配关系中盖层的质量控制着油气聚集的数量。

In order to study oil-gas accumulation law in Fangzheng fault depression, based on the characteristics of development and distribution of source rock and caprock, this paper studied the spatial matching relation between source rock and caprock and its control action on oil-gas accumulation in Fangzheng fault depression. The result shows that there are two types of spatial matching relation between source rock and caprock itself and lower sourcerock and upper caprock in Fangzheng fault depression. There are two sets of spatial matching relation between source rock and caprock in the first type, and they formed in Xin’ancun-Wuyun Formation. There are three sets of spatial matching relation between source rock and caprock in the second type, and they formed in Xin’ancun-Wuyun Formation to the second member of Baoquanling Formation. The first and third sets distributed in the whole fault depression, the second and fifth sets only distributed in the eastern fault depression, and the fourth set only distributed in the western fault depression. The control action of these five sets of spatial matching relation between source rock and caprock on oil-gas accumulation mainly displays in the following three aspects: ①the numbers of spatial matching relation between source rock and caprock control oil-gas accumulation and distribution horizons; ②the numbers of spatial matching relation between source rock and caprock in the same horizon control oil-gas accumulation amount; ③caprock quality in spatial matching relation between source rock and caprock also controls oil-gas accumulation amount.