ISSN 1004-4140
CN 11-3017/P
胡伟, 秦德文, 李琴, 等. 双宽地震资料在东海X气田河道砂体预测中的应用[J]. CT理论与应用研究, 2022, 31(3): 293-304. DOI: 10.15953/j.ctta.2021.017.
引用本文: 胡伟, 秦德文, 李琴, 等. 双宽地震资料在东海X气田河道砂体预测中的应用[J]. CT理论与应用研究, 2022, 31(3): 293-304. DOI: 10.15953/j.ctta.2021.017.
HU W, QIN D W, LI Q, et al. Application of double width seismic data to channel sand body prediction of X gas field in the East China Sea[J]. CT Theory and Applications, 2022, 31(3): 293-304. DOI: 10.15953/j.ctta.2021.017. (in Chinese).
Citation: HU W, QIN D W, LI Q, et al. Application of double width seismic data to channel sand body prediction of X gas field in the East China Sea[J]. CT Theory and Applications, 2022, 31(3): 293-304. DOI: 10.15953/j.ctta.2021.017. (in Chinese).

双宽地震资料在东海X气田河道砂体预测中的应用

Application of Double Width Seismic Data to Channel Sand Body Prediction of X Gas Field in the East China Sea

  • 摘要: 东海X气田主力储层埋藏深、横向变化大,常规地震资料品质较差、分辨率低,满足不了勘探开发中日益精细的地质需求。采用三船四源斜缆的采集方式获得宽频宽方位的地震资料,其具有高分辨率、高信噪比、高保真度的特征。应用宽频宽方位地震资料高分辨率、各向异性的优势信息,结合叠前同时反演,求取分方位的河道砂体敏感弹性参数反演体,并且把垂直于河道走向的多个方位反演体进行叠加,从而进行河道砂体的精细预测。相比于常规地震资料,基于宽频宽方位地震资料的储层反演提高了河道砂体的预测精度,为东海X气田的滚动勘探与开发开采奠定了基础。

     

    Abstract: Due to that the main reservoirs of the X gas field in the East China Sea were deeply buried and have large lateral changes, the conventional seismic data resulted in poor quality and low resolution, which couldn’t meet the increasingly refined geological requirements in exploration and development. Seismic data with wideband and wide azimuth was obtained by using the acquisition method of three ships and four sources with oblique cables, which held the characteristics of high resolution, high signal-to-noise ratio and high fidelity. By taking advantage of the superior information of wideband and wide azimuth seismic data which was high-resolutional and anisotropic, combined with the simultaneous prestack inversion, the inversion body of sensitive elastic parameters of channel sand bodies in different azimuths can be obtained, and superimpose multiple azimuth inversion bodies perpendicular to the direction of the river channel to carry out fine predictions of channel sand bodies. Compared the conventional seismic data, reservoir inversion based on wideband and wide azimuth seismic data improved the prediction accuracy of channel sand bodies, laying a foundation for the progressive exploration and development of the X gas field in the East China Sea.

     

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