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由现场资料统计证实,裂缝性碳酸盐岩底水油藏的含水井产量,是按指数规律递减,即油井日产量与累计产油(直角坐标系)是线性关系。对油井压锥前后的可采油量变化,可用图解法估算。油井压锥可分为见水压锥和含水压锥。见水压锥(含水生产不足三个月)效果主要表现在延长无水期、增加无水采油量上;含水压锥效果主要表现在降低含水、减缓产量递减上。整体上看,两者均可提高油井可采油量和油藏采收率。多井压锥的效果,只有落实到独立水动力单元(山头或油藏)上,才认为效果是落实的。估算油藏或山头可采储量的增值,现场常用的方法是动态资料的水驱特征曲线分析法和油水界面与累计产油量关系曲线分析法。
Statistics from the field data confirm that the production of water wells in fractured carbonate bottom water reservoirs decreases exponentially, that is, the daily production of oil wells is linear with the accumulated oil production (Cartesian coordinate system). Before and after the pressure cone on the oil production changes can be calculated using graphical method. Oil well pressure cone can be divided into see the pressure cone and water pressure cone. See the water pressure cone (less than three months of water production) results mainly in the extension of water-free period, increasing the amount of anhydrous oil production; water pressure cone mainly in the lower water content, slow down the decline in production. On the whole, both of them can improve the oil recovery and oil recovery of wells. The effect of multi-well coning is only validated by the implementation of an independent hydrodynamic unit (hill or reservoir). Estimating the added value of recoverable reserves in reservoirs or hills. Commonly used methods in the field are the water drive characteristic curve analysis method for dynamic data and the curve analysis method for the relationship between oil-water interface and cumulative oil production.