碳酸盐岩注水替油效果差油井主要影响因素及治理对策

塔河采油二厂注水替油开发效果明显，近三年减缓，年自然递减平均在10%~15%，统计发现仍有16.1%井数比例的油井注水替油效果差，表现为注水轮次少，生产高含水。分析认为，影响注水替油效果的主要因素是井眼位置低、储层条件不好、注水参数设计欠合理三者之一或复合构成，并提出了治理对策；同时完善了注水替油选井及注水参数设计原则。现场实施取得了较好的效果，具有推广意义。

Main influencing factors and countermeasures of waterflood failure in carbonate rocks

The effect of waterflood development in the Tahe Oilfield is obvious, preventing annual natural decline by 10%-15% in the recent 3 years. Statistics have indicated that 16. 1% of total wells fail in waterflood, featured by less injection times and high water cut production. The main influencing factors of waterflood failure include low hole location, poor reservoir condition, unreasonable waterflood parameter design or their composition. Countermeasures are put forward. The principles of well selection and waterflood parameter design are modified. Field application has achieved good effect, proving significance for promotion.