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对复杂的应力敏感裂缝型油藏来说,裂缝系统的储量大小对整个油田的开发起着至关重要的作用。以物质平衡方程为基础,研究了应力敏感裂缝型油藏储量的计算方法。采用实际覆压实验数据建立了数值模拟单井概念模型,使用模型模拟计算的压力、产量数据,该方法可分别计算出裂缝和岩块系统原油储量,与实际储量的对比验证了方法的正确性。结果表明,不考虑裂缝压缩系数变化时,采用物质平衡方程计算的裂缝储量明显小于实际值;考虑裂缝系统压缩系数变化后可以准确计算裂缝系统储量,计算误差在5%以内;该研究结果对应力敏感裂缝型油藏高效开发具有指导意义。
For complex stress-sensitive fractured reservoirs, the size of the fracture system reserves plays a crucial role in the development of the entire field. Based on the material balance equation, the calculation method of stress-sensitive fractured reservoir reserves is studied. The single-well conceptual model of numerical simulation was established by actual overburden experiment data. The model was used to simulate the pressure and yield data. The method can calculate the crude oil reserves of fractures and rock block systems separately. The comparison with the actual reserves verified the correctness of the method . The results show that the fracture reserves calculated by the mass balance equation are obviously smaller than the actual values without considering the variation of the compressive coefficient of the fractures. The reserves of the fractured systems can be accurately calculated after considering the variation of the compressive coefficient of the fractured system, and the calculation error is within 5% It is instructive to develop sensitive fractured reservoirs efficiently.