Abstract: Natural productivity of low-permeability reservoirs is quite low. If wells produce at natural productivity, their flow rates decline with the same speed as the mid-and high-permeability reservoirs. It wells produce at higher rate than their natural productivity, the flow rates will certainly decline with higher speed, which is the inevitable result of earlier exploitation and late voidation of reservoirs. High speed declinationof flow rates of low-permeability reservoirs are not related to stress sensitivity in reservoir rocks.

Key words: low permeability, reservoir, production rate, decline, stress