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Interbed Demultiple Workflow for Low Relief Structures Onshore Abu Dhabi

机译:与低浮雕结构onshore Abu Dhabi互相多变工作流程

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Good quality seismic data are essential for seismic reseirvoir characterization, from seismic applications (wavelet estimation, low frequency model building, seismic velocity calibration and time to depth conversion) to petro-physical interpretation, rock physics modelling and hard data in deostatistical modeling. Surface seismic data need to possess the necessary level of quality to make the advanced inversion techniques successful in providing the reservoir characterization results to be input into the static models. Interbed multiples occur in all types of seismic datasets and are challenging to address, directly and negatively affecting structural and stratigraphic mapping, as well as extracting concise petrophysical attributes from the seismic data. This is particularly a problem for deep and fractured reservoirs, where strong internal multiple contamination increases the ambiguity of the interpretation and inversion of the seismic data, leading to misleading reservoir characterization, ultimately affecting well construction and placement. These interbed multiples can appear at a very similar timing and amplitudes to primaries due to comparable velocities which makes it difficult to differentiate from primary energy in areas with relatively flat geology. In current paper we will demonstrate the demultiple workflow for low relief structures in Abu Dhabi. To address the specific challenges, Extended Interbed Multiple Prediction or a combination of methods presented. The multiple attenuation workflow described in this work follows forward modelling and adaptive subtraction with primary protection approach, improves the preconditioning of seismic for pre-stack inversion over the target oilfield. "The output seismic data after the optimal multiple attenuation workflow provide a superior seismic inversion and a suitable input for reservoir assessment and delineation of the thin carbonates reservoirs present in UAE" (Melo, Glushchenko et al. 2017).
机译:良好的质量地震数据对于地震reseirvoir表征至关重要,从地震应用(小波估计,低频模型建筑,地震速度校准和时间来深入转换)到石油物理解释,岩石物理建模和岩体统计建模中的硬数据。表面地震数据需要具有必要的质量水平,使得先进的反转技术成功地提供储存器表征结果被输入到静态模型中。在所有类型的地震数据集中发生互相发生的倍数,并且挑战地解决,直接和负面地影响结构和地层映射,以及从地震数据中提取简明的岩石物理属性。这对深层和破碎的储层来说尤其是一个问题,其中强烈的内部多污染增加了地震数据的解释和反演的模糊性,导致储存储层表征,最终影响良好的结构和放置。由于可比较的速度,这些相互相互的倍数可以出现在非常相似的时序和幅度上的原序,这使得难以在具有相对平坦的地质区域的区域中区分原始能量。在目前的论文中,我们将展示Abu Dhabi的低浮雕结构的多元工作流程。为了解决特定的挑战,扩展的多次预测或提供的方法组合。本作工作中描述的多个衰减工作流程跟随前进建模和自适应减法与主要保护方法,改善了对目标油田的堆叠前反转的地震的预处理。 “最佳多衰减工作流程之后的输出地震数据提供了卓越的地震反演和适当的储层评估输入,绘制了UAE中存在的薄碳酸盐储存器”(Melo,Glushchenko等。2017)。

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