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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.
For a long time, the current narrow azimuth processing technology has played an important role in the exploration and development of the Sulige gas field. However, with the deepening of seismic technology research, there are many problems in the narrow azimuth seismic processing technology, Problem, it is difficult to carry out azimuthally anisotropic treatment in real sense, which greatly restricts the further improvement of seismic reservoir prediction accuracy, and wide azimuth processing technology is an effective way to improve or solve these problems. Sulige area has carried out a wide azimuth processing technology application research, mainly for the Sulige area seismic data coverage is low, irregular observation system, the application of an offset distance vector chip (OVT) technology, the main achievement The process includes: Swap OVT gather, five-dimensional regularization, OVT pre-stack time migration, OVG gather processing, etc. The results show that OVT processing in the amplitude fidelity, azimuth anisotropy processing, collecting footprints Of the suppression has obvious advantages, and the application of data processing results in the prediction of tight sandstone reservoir, the application effect is better than the application of narrow azimuth Data.