Although there is not steadily distributed thicker shaly rock in the deep part of Songliao basin, we believe that the deep part is better than shallower part when considering the geologic conditions of forming abnormal pressure.

• 松辽盆地深层虽然没有稳定分布的较厚泥岩层，但从形成压力异常的地质条件看，深层要优于浅层。