高含水水平井剩余油潜力研究

Study on Remaining Oil Potential of Horizontal Well in High Water Cut Period

针对目前油田部分水平井出现含水上升快、产量递减迅速,开发效益变差等问题,根据高含水水平井见水特征,将其分为折线型、凹S型、凸S型与直线型四种类型;应用油藏数值模拟技术,分析不同类型水平井水淹规律与剩余油潜力,得出高含水水平井剩余油潜力依次是:凸S型>凹S型>折线型>直线型。研究成果可为高含水水平井控水稳油措施的研究与制定提供依据,对进一步提高水平井开发效果具有重要指导意义。

To solve the current problems in the oilfield that water-cut increases quickly, production decline becomes rapidly and development efficiency turns worse of some horizontal wells, divides horizontal well into four types according to the water breakthrough characteristic including fold line type, concave S type, convex S type and linear type, analyzes water flooding law and remaining oil potential of different types of horizontal wells by using reservoir numerical simulation. The remaining oil potential of high water cut horizontal well obtained is： convex S type〉 concave S type〉fold line type〉linear type. The research results provide basis for studying and making measures to stabilize oil production by water control of high water cut horizontal wells, and have important guiding significance in improving development efficiency of horizontal wells.