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- W4224250556 abstract "The water blocking damage to the reservoir caused by the invasion of external fluid is one of the main factors that affect the efficient development of tight sandstone gas reservoirs. In this paper, microfluidic chip technology is used to explore the causes of water blocking damage in porous media and find suitable recovery solutions. The research results show that reducing the gas-liquid capillary pressure can effectively reduce the rate and quantity of spontaneous speed of cores. After chemical treatment, the liquid phase fluidity of the non-fractured matrix core is increased by 1.72 times, and that of the fractured core is increased by 2.13 times. In water wetting porous media, there are mainly four types of liquid hold-up: (1) Liquid hold-up in the dead volume of a non-connected pore; (2) The water phase in the pore throat with a small inner diameter cannot be driven away due to its larger capillary pressure; (3) Adsorption viscous force, the wetting phase is adsorbed on the surface of the solid phase; (4) Reservoir heterogeneity. The water blocking damage can be removed to a certain extent by changing the gas injection pressure, the gas injection method, or adding a wetting modifier." @default.
- W4224250556 created "2022-04-26" @default.
- W4224250556 creator A5066017441 @default.
- W4224250556 creator A5075877965 @default.
- W4224250556 date "2022-04-06" @default.
- W4224250556 modified "2023-09-26" @default.
- W4224250556 title "Study on the Causes of Water Blocking Damage and Its Solutions in Gas Reservoirs with Microfluidic Technology" @default.
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- W4224250556 doi "https://doi.org/10.3390/en15072684" @default.
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