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进入特高含水期开采阶段后,过渡带存在开采井网密度低、采油速度低、整体开发效果差等矛盾。为进一步改善过渡带地区的水驱开发效果,通过评价过渡带分条带的水驱开发效果,明确影响水驱开发效果的主要因素,分析过渡带分条带原油物性变化规律,确定过渡带加密的合理注采井距,优选出萨北开发区过渡带三、四条带井网加密方式,为特高含水期精细挖潜奠定重要基础。
After entering the stage of extra-high water cut, the transition zone has the contradiction of low production density, low oil recovery rate and poor overall development effect. In order to further improve the development effect of water flooding in the transition zone, the main factors influencing the development of water flooding were clearly identified by evaluating the development effect of water flooding in the transition zone, analyzing the variation law of physical properties of the crude oil in the transition zone, Of the reasonable injection well spacing, preferably out of the Northern transition zone of the Saibei Development Zone with three or four well pattern encryption, the ultra-high water cut to establish an important foundation for fine tapping.