Experiments to characterize the constant-rate gas depleted production behavior in core samples were performed to study the areal gas flowing mechanism of a high-pressure low-permeability heterogeneous gas reservoir, including a newly designed long-core experiment on areal heterogeneity constant-rate gas depleted production considering fracturing. In the experiments, the fluid pressure increased up to 45 MPa, and the cores of the near-wellbore high permeability area before and after fracturing and the cores of the low permeability non fractured area were connected in series to simulate the gas flowing process of the dual-area composite gas reservoir. When the irreducible water saturation is considered, the gas permeability in a high permeability area cater fracturing increased threefold. Experimental results indicated that the pressure difference in the near-wellbore high permeability area decreased rapidly after fracturing and increased in the low permeability area. The recovery:factor of each area increased titter fracturing. Fracturing could have a significant effect on increasing the recovery factor when the average permeability is relatively low. The greater the gas rate, the higher is the built-up pressure alter shut-in. Fracturing in the near-wellbore area may cause a significant decrease in the shut-in built-up pressure value.

为研究高压低渗透非均质气藏的区域气体流动机制，进行了岩心样品恒速耗气生产行为表征实验，包括新设计的区域非均质恒速气藏长岩心实验考虑压裂的枯竭产量。实验中将流体压力提高到45 MPa，将压裂前后近井高渗区岩心与低渗非压裂区岩心串联，模拟该区的气体流动过程。双区复合气藏。当考虑束缚水饱和度时，高渗透区的气体渗透率为压裂增加了三倍。实验结果表明，近井筒高渗透区压裂后压差迅速减小，低渗透区压差增大。采收率：各区因子增加滴压压裂。当平均渗透率相对较低时，压裂对提高采收率有显着影响。气体流量越大，关井后的压力就越高。近井区压裂可能导致关井压力值显着降低。当平均渗透率相对较低时，压裂对提高采收率有显着影响。气体流量越大，关井后的压力就越高。近井区压裂可能导致关井压力值显着降低。当平均渗透率相对较低时，压裂对提高采收率有显着影响。气体流量越大，关井后的压力就越高。近井区压裂可能导致关井压力值显着降低。