A study of aqueous phase invasion in tight sandstone of crack-pore dual medium
Tight sandstone has crack-pore dual medium features in general.In the process of drilling and com-pletion,tight sandstone gas reservoir is highly vulnerable to water invasion damage,due to the extremely small pores and strong water wettability.Based on present researches of invasion problems in tight sandstone gas res-ervoirs,visualization tests of liquid phase intrusion were conducted under different hydrostatic column pres-sure and crack width.Aqueous phase invasion in tight sandstone cracks was studied.Results showed that the liquid phase was mainly offected by the capillary force,the gravity of the fluid,the viscous resistance of the capillary wall to the fluid and the inertial force acted together.
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万方数据
维普
