Many gas-bearing volcanic reservoirs were discovered in Xujiaweizi Fault Depression of northern Songliao Basin, especially in Yingcheng I Formation.

• 摘要松辽盆地北部徐家围子地区深层发育了大量的火山岩体，特别是营城组一段，火山岩相以多期的爆发相和喷溢相空间相互叠置为主。