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在双相介质理论指导下构建的流体因子Gassmann流体项f可以实现对油水层的有效判识。本文基于包含流体因子f的反射系数近似公式推导,得到相应的流体弹性阻抗方程,将流体因子纳入地震反演过程并直接参与目标储层的流体识别,实现了从弹性阻抗数据体中直接反演流体因子f的方法技术流程。流体因子f的直接反演有效减少间接计算所带来的累计误差,提高了地震流体识别的精度。在实际资料应用中,结合研究区地质背景与地球物理特征开展的岩石物理分析表明,Gassmann流体因子f对含油和含水特征有较好的区分作用。反演结果表明,流体因子f能为有效地识别目的层的油水特征,为下一步的钻井开发提供可靠的技术支持。
The Gassmann fluid term f, constructed under the guidance of two-phase medium theory, can effectively identify the oil-water layer. Based on the approximate reflection coefficient formula including fluid factor f, the corresponding fluid elastic impedance equations are derived. The fluid factors are incorporated into the seismic inversion process and directly participate in the fluid identification of the target reservoir. The inversion from the elastic impedance data body Fluid factor f method technical process. The direct inversion of fluid factor f can effectively reduce the cumulative error caused by indirect calculation and improve the accuracy of seismic fluid identification. In the actual data application, the petrophysical analysis based on the geological background and geophysical characteristics of the study area shows that the Gassmann fluid factor f has a good distinction between the oil-bearing and the water-bearing features. The inversion results show that the fluid factor f can effectively identify the oil-water characteristics of the target formation and provide reliable technical support for the next drilling development.