炮检距向量片技术在苏里格致密砂岩储层预测中的应用

发布时间：2018-05-27 05:12

本文选题：窄方位 + 宽方位　；参考：《地球物理学进展》2017年02期

【摘要】：长期以来现行的窄方位处理技术在苏里格气田勘探开发中发挥了重要的作用,但是随着地震技术研究的深入,发现窄方位地震处理技术存在诸多问题,比如近中远炮检距振幅不均匀问题、难以进行真正意义上的方位各向异性处理问题等,这很大程度上制约了地震储层预测精度的进一步提高,而宽方位处理技术是改善或解决这些问题的有效方法.因此,在苏里格地区进行了宽方位处理技术的应用研究,主要针对苏里格地区地震资料覆盖次数低、观测系统不规则的特点,应用了一种炮检距向量片(OVT)技术,其主要实现过程包括:互换的OVT道集抽取,五维规则化处理、OVT域叠前时间偏移、OVG道集的处理等.应用结果表明OVT处理在振幅保真性、方位各向异性处理、采集脚印的压制方面有明显的优势,并将处理成果数据应用于致密砂岩储层预测中,其应用效果优于应用窄方位处理的数据.
[Abstract]:The existing narrow azimuth processing technology has played an important role in the exploration and development of Sulige gas field for a long time, but with the development of seismic technology, it is found that there are many problems in the narrow azimuth seismic processing technology. For example, the nonuniform amplitude of the near Cosco offset, the difficulty in processing azimuth anisotropy in real sense, and so on, which to a large extent restrict the further improvement of seismic reservoir prediction accuracy. Wide azimuth processing is an effective method to improve or solve these problems. Therefore, the application of wide azimuth processing technology in Sulige area is studied. Aiming at the characteristics of low coverage of seismic data and irregular observation system in Sulige area, an offset vector slice technique is applied. The main implementation processes include: interchangeable OVT gather extraction, five-dimensional regularization processing, prestack time migration in OVT domain and processing of OVG gathers, etc. The application results show that OVT processing has obvious advantages in amplitude fidelity, azimuth anisotropy processing and the compaction of acquisition footprints, and the processing result data are applied to the prediction of tight sandstone reservoir. Its application effect is better than that of narrow azimuth processing.
【作者单位】：中国石油东方地球物理公司研究院长庆分院;长庆油田苏里格气田研究中心;低渗透油气田勘探开发国家工程实验室;
【基金】：国家“十三五”科技攻关重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程(2016ZX05050007)”资助
【分类号】：P631.4

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