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    基于混合注意力机制的智能化地震波阻抗反演方法研究

    Research on an intelligent method for seismic impedance inversion based on hybrid attention mechanisms

    • 摘要: 地震波阻抗反演是储层预测的关键技术之一。近年来,人工智能在地震波阻抗反演领域展现出良好的应用潜力。然而,由于在实际应用中往往难以获取大规模、高质量的标签数据,导致基于常规监督学习模式的智能化地震波阻抗反演方法在面对岩性变化快、非均质性强、厚度较薄的复杂储层时,存在反演精度低、适用性差等问题,严重影响了复杂储层的识别与预测效果。本文提出了一种基于混合注意力机制(CBAM)的地震波阻抗反演方法。该方法采用自监督学习模式构建智能化地震波阻抗反演模型,模型训练无需标签数据,可有效突破训练集标签数据不足对地震反演造成的应用限制。通过在网络结构中引入混合注意力机制,提升反演模型对重要信息的提取能力,有效提高地震反演精度和可靠性,降低模型对训练集规模的依赖。正演模拟数据和实际资料应用结果表明,该方法可以实现对复杂储层的高精度地震波阻抗反演与储层预测。

       

      Abstract: Seismic impedance inversion is one of the essential technologies for reservoir prediction. In recent years, artificial intelligence has demonstrated promising application potential in the field of seismic impedance inversion. However, the lack of large-scale and high-quality labels constrains the accuracy and applicability of seismic impedance inversion methods in the framework of supervised learning, particularly when characterizing complex reservoir with features of rapid lithological changes, strong heterogeneity, and thin layers. In this paper, we proposed a seismic impedance inversion method based on hybrid attention mechanisms with convolutional block attention module(CBAM). The method constructs an intelligent seismic impedance inversion model in a self-supervised learning framework. The inversion model can be trained by the training data without labels, which can overcome the limitations imposed by insufficient labeled training data in seismic inversion applications. CBAM can effectively enhance the inversion model’ ability to extract critical information, improve the accuracy and reliability of seismic inversion, and reduce the dependence on the size of the training datasets. Application on the forward modeling data and field data demonstrate that the proposed method can achieve high-accuracy seismic impedance inversion and reservoir prediction for complex reservoirs.

       

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