Amplitude versus offset attribute inversion method for characterizing gas hydrate: Insights from high resolution seismic imaging and drilling results in the Shenhu area, South China Sea

IF 1.8 3区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Geophysical Prospecting Pub Date : 2024-11-24 DOI:10.1111/1365-2478.13641

Xudong Zhang, Fanxiang Zeng, Wenbin Jiang, Dajiang Meng, Sheng Yan

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Abstract

Amplitude versus offset attribute inversion primarily utilizes the change in amplitude with offset to extract lithologic information of the reservoir. We performed high resolution imaging using three-dimensional seismic data and simulated four different models of gas hydrate and free gas to optimize the selection of sensitive attributes for gas hydrate characterization. We optimized the selection of sensitive attributes for gas hydrate characterization. Our research identified the gradient parameter G as a highly sensitive attribute for characterizing gas hydrate reservoirs. By comparing theoretical models with drilling site data, we predicted the saturation variations of gas hydrate based on the amplitude of G and summarized the amplitude versus offset characteristics and sensitive attributes of gas hydrate at different saturation levels. The results offer valuable insights for identification of gas hydrate in seismic data and provide a reference for their characterization.

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天然气水合物的振幅-偏移属性反演方法：来自南海神狐地区高分辨率地震成像和钻井结果的启示

振幅-偏移属性反演主要利用振幅随偏移量的变化来提取储层的岩性信息。利用三维地震数据进行了高分辨率成像，并模拟了四种不同的天然气水合物和游离气模型，以优化天然气水合物表征的敏感属性选择。我们优化了表征天然气水合物的敏感属性的选择。研究发现，梯度参数G是表征天然气水合物储层的一个高度敏感的属性。通过理论模型与钻井现场数据的对比，基于G振幅预测了天然气水合物的饱和度变化，总结了不同饱和度水平下天然气水合物的振幅与偏移量特征和敏感属性。研究结果为地震资料中天然气水合物的识别提供了有价值的见解，并为其表征提供了参考。

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来源期刊

Geophysical Prospecting 地学-地球化学与地球物理

CiteScore

4.90

自引率

11.50%

发文量

118

审稿时长

4.5 months

期刊介绍： Geophysical Prospecting publishes the best in primary research on the science of geophysics as it applies to the exploration, evaluation and extraction of earth resources. Drawing heavily on contributions from researchers in the oil and mineral exploration industries, the journal has a very practical slant. Although the journal provides a valuable forum for communication among workers in these fields, it is also ideally suited to researchers in academic geophysics.