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本文首次建立了有限含水层未饱和油藏物质平衡微分方程组。求解这个方程组,可以得到计算油层压力随时间变化的关系式。用这个关系式与实际油藏压力资料进行历史拟合,可同时求得油藏和含水层的弹性能量系数以及水侵系数。应用这些参数可以计算出油藏的原始原油储量,含水层的原始水储量,累积水侵量,以及预测在不同产量变化条件下油层压力的变化。
For the first time, this paper established the material balance differential equations for unsaturated reservoirs in finite aquifers. Solving this system of equations results in a formula that calculates reservoir pressure over time. Using this relationship and actual reservoir pressure data for historical fit, elastic energy coefficients and water intrusion coefficients for reservoirs and aquifers can be obtained simultaneously. Using these parameters, the original crude oil reserves of the reservoir, the original water reserves of the aquifer, the accumulated water intrusion can be calculated and the change of reservoir pressure predicted under different production variations.