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在松辽盆地北部东区的扶杨油层和在东南缘的十屋断陷中，发育了三个地层流体低压区，压力系数分别为０．９３～１．０，０．６５～０．９６和０．９６～０．５５，都是松辽盆地主要的天然气聚集区。低压的成因机理是由于天然气的漏失减小的能量大于天然气和地下水运移补给增加的能量。在盆地北部东区的扶杨油层中，由于在天然气流动方向上储层厚度、孔渗都明显增加，流体补给增加的能量与流体散失减小的能量之间的差值在天然气的运移方向上增加，导致在天然气运移方向上压力系数减小。十屋断陷的地层压力剖面可以划分为明显的三个带，它们分别对应于三个水文地质分带，即自由交替带，交替阻滞带和交替停滞带。在自由交替带地下水供排平衡，保持正常的地层压力。在交替阻滞带和交替停滞带，由于天然气漏失损失的能量大于天然气、地下水下渗补给增加的能量，形成低压，且往下地下水的补给量迅速减小、消失，而天然气的漏失量随着埋深的增加而增加，从而使得天然气运移方向上压力系数增加。
In the Fuyang oil layer in the north of the Songliao Basin and in the Shiwu fault depression in the southeast margin, three low-pressure fluids are developed, with pressure coefficients of 0.93-1.0 and 0.65-0.96, respectively 0.96 ~ 0.55, are the main natural gas gathering area in Songliao Basin. The mechanism of low pressure is due to the fact that the energy lost due to the loss of natural gas is greater than the increased energy supplied by the transport of natural gas and groundwater. In the Fuyang oil layer in the eastern part of the northern part of the basin, due to the reservoir thickness in the flow direction of natural gas, the pore permeability is significantly increased. The difference between the energy added by the fluid replenishment and the energy reduced by fluid loss is in the direction of the natural gas migration Increases, resulting in a decrease in pressure coefficient in the direction of gas migration. The stratigraphic pressure profiles of the Shiwu Fault Depression can be divided into three distinct zones, corresponding to three hydrogeological zones, namely, free-alternating zones, alternating zones and stagnation zones. In the free exchange with groundwater supply and drainage balance, to maintain normal formation pressure. In the alternating block zone and alternating stagnation zone, the loss of natural gas due to loss of energy than natural gas, groundwater seepage recharge to increase energy, the formation of low pressure, and groundwater recharge down to quickly reduce and disappear, and natural gas loss with The increase of buried depth increases the pressure coefficient in the direction of gas migration.