【摘要】 水平井是挖潜剩余油的重要手段,但由于地层中剩余油存在的空间形态复杂,对水平井挖潜剩余油的适用条件并不清楚。通过对剩余油的空间形态进行抽象处理,建立了水平井挖潜剩余油的抽象模型。依据实际剩余油的分布特点,利用抽象模型建立的数值模拟模型研究了水平段纵向位置、水平段长度、剩余油形状、剩余油面积、油层厚度和生产压差6种因素对水平井挖潜剩余油开采效果的影响。结果表明,长宽比为4的长条形,厚度为6m以上,面积达到0.04km2以上的剩余油适宜利用水平井进行挖潜;水平段长度为剩余油长度的0.8倍,位于油层顶部1/3处的水平井进行挖潜能获得最佳效果。更多还原

【Abstract】 Horizontal wells drilling is an important method of producing remaining oil,but the mechanisms and application conditions are uncertainty due to the complex occurrence of the remaining oil. An abstract model was established for horizontal wells remaining oil producing. Factors influencing horizontal wells remaining oil production,include vertical position and length of horizontal interval,shape and area of remaining oil,reservoir thickness and drawdown,were studied by numerical simulation model. The remaining oil with ratio of length and wideness of 4,6m of thickness and more than 40 000m2 of area is suitable to tap the potential by the horizontal wells. When the thickness of the horizontal interval is 0. 8 times of remaining oil length and the position is at 1/3 of the top of reservoirs,the horizontal wells will gain the best results.更多还原