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研究小层剩余油的传统方法是根据静、动态资料确定目前剩余油的饱和应并分配到小层，从而从宏观上确定整个油区的剩余油挖潜区。文中应用盈亏平衡的原理，从技术经济的角度对剩余油饱和度低的抵效油井进行了微观分析，由此进一步指出剩余油分布的范围和层位，这同样可为油田开发决策提供依据。
The traditional method of studying the residual oil in the small layer is to determine the saturation of the remaining oil and distribute it to the small layer based on the static and dynamic data so as to determine the remaining oil tapping potential of the whole oil region macroscopically. Applying the principle of breakeven, this paper makes a microscopic analysis of the oil well with low remaining oil saturation from the technical and economic point of view, and further points out the range and horizon of remaining oil distribution, which can also provide the basis for oilfield development decision-making.