根据松辽盆地营城组火山岩与上覆和下伏沉积岩的速度与密度资料,利用褶积原理进行火山机构正演。结果表明营城组火山机构顶、底界面反射强,内部反射弱;顶界面为正极性,而底界面为负极性。当火山岩底界深度一致的时候,在火山机构中心地区火山岩底界面在时间剖面上出现上拱的现象。 Based on the velocity and density data of Yingcheng volcanic rocks and overlying and underlying sedimentary rocks in Yingcheng Formation of Songliao Basin, volcanic units are developed using the convolution principle. The results show that the top and bottom interface of Yingcheng Formation volcano is strong and the internal reflection is weak. The top interface is positive and the bottom interface is negative. When the depth of the bottom of the volcanic rocks is the same, the arching appears at the bottom of volcanic rock in the center of the volcanic area.