Abstract: Determination of perforation intervals and optimal shot density of wells in bottom-water reservoirs with barriers isstudied and presented. The study shows that barriers with both high critical rates and high production rates existed in bottom-water reservoirs are generally protected or retained, while those with high critical rates and low production rates or low criticalrates and high production rates should be perforated.The wells perforated by distribution of the barriers appear in higherproduction rates and postpone the breakthrough time of bottom-water on a large scale. Bottom-water reservoirs with barriers displayabundant natural drive energy in development and overcome the drawbacks of short water-free oil production period in bottom-water reservoirs without barriers.

Key words: bottom-water reservoir, production rate, perforation interval, barrier