双宽地震资料在东海X气田河道砂体预测中的应用

胡伟; 秦德文; 李琴; 俞伟哲; 黄鋆

doi:10.15953/j.ctta.2021.017

双宽地震资料在东海X气田河道砂体预测中的应用

中海石油（中国）有限公司上海分公司, 上海200335

基金项目: 中国海油“七年行动计划”东海专项课题（西湖凹陷西部地区勘探开发关键技术研究（CNOOC-KJ 135 ZDXM39 SH01））

详细信息

作者简介:
胡伟: 男，中海石油（中国）有限公司上海分公司研究院工程师，主要从事海洋石油勘探研究工作，E-mail：huwei3@cnooc.com.cn

中图分类号: P 315；P 631
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出版历程
- 收稿日期: 2021-10-14
- 录用日期: 2021-11-28
- 网络出版日期: 2021-12-08
- 发布日期: 2022-05-22

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

Shanghai Branch of CNOOC Co.Ltd., Shanghai 200335, China

摘要

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。
- 宽频宽方位 /
- 各向异性 /
- 储层预测 /
- 叠前反演
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.
- wideband and wide azimuth seismic data /
- anisotropic /
- reservoir prediction /
- prestack inversion

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图 1 宽方位地震采集观测系统

Figure 1. Observation system for wide azimuth seismic data acquisition

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图 2 宽方位地震方位角玫瑰图

Figure 2. Rose diagram of azimuth of wide azimuth seismic data

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图 3 双宽地震资料与常规地震资料剖面对比

Figure 3. Comparison of profiles between double width seismic data and conventional seismic data

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图 4 双宽地震资料与常规地震资料时间切片对比

Figure 4. Comparison of time slices between double width seismic data and conventional seismic data

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图 5 双宽地震资料与常规地震资料频宽对比

Figure 5. Comparison of bandwidth between double width seismic data and conventional seismic data

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图 6 双宽地震资料与常规地震资料反演对比

Figure 6. Comparison of Inversion result between double width seismic data and conventional seismic data

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图 7 河道砂体预测示意图

Figure 7. Schematic diagram of channel sand body prediction

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图 8 河道砂体预测流程

Figure 8. Channel sand body prediction process

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图 11 H5层河道砂体预测平面展布

Figure 11. Prediction plane distribution of channel sand body in layer H5

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图 9 岩石物理交汇分析

Figure 9. Petrophysical intersection analysis

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图 10 优势方位角反演剖面

Figure 10. Inversion profile of dominant azimuth

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图 12 双宽地震资料与常规地震资料H5层反演对比

Figure 12. Comparison of inversion results of layer H5 between double width seismic data and conventional seismic data

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