Its reservoir with secondary porosity zone is also a key for petroleum pool formation, which is of distributary channel of fan delta front.
该构造储层属三角洲前缘亚相的水下分流河道微相沉积，并存在由成岩作用形成的次生孔隙发育带。
The main layer is Putaohua Formation, deposited in the transition zone from a large delta front to lake in northern Songliao Basin.
主要含油层位是葡萄花油层，沉积时期处于松辽盆地北部大型三角洲沉积体系的前缘相带到湖相的过渡带上。
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