The petrophysics study on deep andesite rocks is very important in Yingshan downcast of Songliao Basin, because gas reservoirs have been discovered in the area of deep andesite.

• 莺山断陷在深层侏罗系安山岩中发现气层,从而使深层火山岩成为松辽盆地又一个勘探目的层。