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Populating a PSDM created earth model with PSTM predicted seismic properties

机译:使用PSTM预测的地震特性填充PSDM创建的地球模型

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摘要

When an earth model is constructed from depth migrated seismic data and porosity is predicted from time migrated data, we are confronted with spatially inconsistent information. To use the predicted porosities in the earth model the data needs to be converted to depth and re-positioned. In this case study, we present a pragmatic approach in which porosity trace positions were shifted after depth conversion to their correct x/y positions followed by a vertical depth-to-depth transformation to correct the remaining misfit. The x/y shifts were calculated by image ray map migration in the earth model. Porosity was predicted from 3D time migrated data by acoustic impedance inversion followed by pseudo-well modelling and neural network inversion.
机译:当根据深度偏移的地震数据构建地球模型,并根据时间偏移的数据预测孔隙度时,我们将面临空间不一致的信息。为了在地球模型中使用预测的孔隙度,需要将数据转换为深度并重新定位。在本案例研究中,我们提出了一种实用的方法,其中在深度转换后将孔隙度轨迹位置移动到其正确的x / y位置,然后进行垂直的深度到深度转换以校正剩余的失配。 x / y偏移是通过地球模型中的图像射线图迁移来计算的。通过声阻抗反演,伪井建模和神经网络反演,从3D时间偏移数据预测孔隙度。

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