The Wumishan Formation in Yanling Oilfield is a carbonate reservoir with percolation flow through dual media, and the reservoir heterogeneity is serious.

• 雁翎油田雾迷山组油藏为双重渗流介质的碳酸盐岩油藏，裂缝、溶洞发育，储层非均质性严重。