Abstract: BZ25?1s oilfield is a narrow channel sand reservoir in the Bohai Sea, and the real deliverability of oil well is greatly influenced by the narrow sandbody width. Because of short testing by drill stem test (DST), the DST result cannot reflect the influence of sandbody boundary on the real deliverability, and the correction of result is necessary in general. The existing correction methods are usually based on analogy or experiences, without considering the influence of sandbody boundary on deliverablility correction coefficient. According to oil well pressure responses on the narrow channel sand bodies, this paper derives the oil production index formular of steady and/or unsteady seepage, with consideration of the channel sand boundary, further obtaining the DST result’s correction coefficient and analyzing the influencing factors of the coefficient. The results show that the narrower the channel width, the greater the difference between DST test result and actual productivity, and the more necessary the correction is; when the channel width ranges from 100 m to 300 m and the DST duration is about 0.5~15 h, the correction coefficient is about 0.3~0.7. The case study indicates that the result corrected by this method is more suitable for the actural situation in BZ25?1s oilfield