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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Estimating elastic impedance from seismic inversion method: a study from Nova Scotia field, Canada
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Estimating elastic impedance from seismic inversion method: a study from Nova Scotia field, Canada

机译：估算地震反演方法的弹性阻抗：加拿大新斯科舍省的研究

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摘要

In the present study, elastic impedance (EI) inversion is performed to estimate subsurface elastic properties in inter-well regions. These elastic properties are helpful to discriminate gas-bearing formation from gas-free formation, as well as overpressure zone. Seismic reflection data from the Penobscot Scotia shelf, Canada are used for the analysis which is performed in two steps. First, the method is tested with noise-free synthetic data, as well as with addition of 5%, 10%, 20% and 30% Gaussian noise. The analysis shows that efficacy of EI inversion decreases by 3.4% with addition of 30% noise in the data compared to noise-free data. In the second step, EI inversion is applied to the real data and variation of EI is estimated for near- and far-angle stack gathers. The analysis demonstrates that the inverted results follow the well-log curve satisfactorily. The results also show higher resolution images for the far-stack data compared to the near-stack data. Incidentally, it is noticed that the area of study does not contain any major gas or overpressure zones. As of now, the analysis has been performed for small datasets of the region. Robustness of the method needs to be tested with more data from other parts of the region as well.
机译：在本研究中，进行弹性阻抗（EI）反演以估计阱区内的地下弹性特性。这些弹性性能有助于区分含有无气体形成的含气体形成，以及过压区。来自Penobscot Scotia Scotia架子的地震反射数据，加拿大用于分析，以两步进行。首先，通过无噪声合成数据测试该方法，以及添加5％，10％，20％和30％高斯噪声。该分析表明，与无噪声数据相比，EI反转的功效随着数据的增加30％的噪声增加了3.4％。在第二步中，应用于实际数据的EI反转，估计EI的变化估计近 - 和远角堆叠。该分析表明，倒置结果令人满意地遵循良好的日志曲线。结果还显示了与近堆叠数据相比的远栈数据的较高分辨率图像。顺便提及，注意到研究领域不含任何主要的气体或过压区域。截至目前，已经对该区域的小型数据集进行了分析。还需要使用来自区域的其他部分的更多数据来测试该方法的鲁棒性。

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