锦25块特稠油蒸汽吞吐开发后期水淹特征及配套技术实践

Waterflooding characteristics and practice of matching technology during the late period of steam stimulation of Jin 25 block

经过20多年降压开采,辽河油田锦25块特稠油油藏目前已进入蒸汽吞吐开发后期,各项开发指标逐年变差。为减缓锦25块产量递减,综合运用井震联合技术、测井二次解释技术、数模与现场试验和动态分析相结合等技术方法,落实了油藏蒸汽吞吐开发后期剩余油分布规律,制定并实施完善井网、大修侧钻、分支水平井、调补层、优化注汽等配套技术手段,取得了良好的经济效益和社会效益。

After 20 years of depressurization exploitation, Jin 25 block of extra heavy oil reservoir has entered the late period of steam stimulation, each development index has become worse and worse. To slow down the decline, the integrated use of well seismic technology, secondary logging interpretation technique, mathematical model and in situ experiment and dynamic analysis, the remaining oil distribution law of reservoir steam stimulation at late period has been made clear, and the sound well, sidetracking branch overhaul, water Hirai, nourishing layer, optimization of steam injection supporting technology have been implemented and improved, which achieved good economic and social benefits.