1)  Dense penetration layer
					
	
					
				
				
	
					
				渗透致密层
			
					2)  low-permeability tight gas reservoirs
					
	
					
				
				
	
					
				低渗透致密气藏
				1.
					As the main damage of low-permeability tight gas reservoirs, water blocking damage seriously influences the results of gas reservoirs development.
						
						水锁损害是低渗透致密气藏的主要损害类型,严重影响了气藏开发效果。
					
					4)  low-permeability sandstone rock
					
	
					
				
				
	
					
				低渗透致密砂岩
				1.
					Research on calculation of effective stress in low-permeability sandstone rock under cyclic loading and unloading
						
						变围压循环下低渗透致密砂岩有效应力方程研究
					
					5)  superlow-porosity superlow-permeability tight reservoir
					
	
					
				
				
	
					
				特低孔隙度、特低渗透率致密储集层
			
					6)  Low permeability tight sand
					
	
					
				
				
	
					
				低渗致密储层
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