The reservoir pressure of a developed oilfield can be determined not only by shut-in buildup curve for a producing well, but also by shut-in falloff curve of injecting water well.
已开发油田的地层压力既可以由采油井关井的压力恢复曲线确定，也可以通过注水井关井的压力降落曲线确定。
The experimental results shows that sidetrack horizontal well can really increase oil production, extend the production life of injecting water reservoir and enhance oil recovery.
侧钻水平井确实能提高开采效果，延长注水油藏的生产寿命，提高最终采收率。
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