Efficient development theory and technology in tight gas reservoir 并列题名：Efficient development theory and technology in tight gas reservoir Efficient development theory and technology in ultra-low permeability reservoir 并列题名：Efficient development theory and technology in ultra-low permeability reservoir 并列题名：Development theory and technology of high pour point oil reservoir Development theory and technology of high pour point oil reservoir recent developments of law and technology in different countries and areas Geophysical identification theory and method on tight sandstone reservoir