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在二维地震剖面解释中,相交剖面普遍存在时间、振幅、相位不一致的现象,这种现象给构造及岩性解释带来许多麻烦。为此,本文提出了二维地震剖面的时间、振幅、相位的最小平方校正方法。该方法是在最小平方意义下,求取实地震道三个标度(时间、振幅、相位)的校正因子,再通过校正来实现剖面间的互相匹配。实际应用表明,通过三个标度的一致性校正,整个二维地震测网内剖面,特别是构造及地层的对比,复杂地区的剖面得到了很好的闭合。凡经校正后的剖面的精度均得到了提高,更加易于解释,可为油气勘探提供更加精确的地震资料。
In the interpretation of two-dimensional seismic profiles, the phenomena of time, amplitude and phase inconsistency are common in the intersecting sections. This phenomenon brings many troubles to the tectonic and lithological interpretation. To this end, this paper presents a method of least squares correction of time, amplitude and phase of 2D seismic sections. In this method, the correction factors of three scales (time, amplitude and phase) of the real seismic trace are obtained in the sense of least square, and then the cross-sectional matching is achieved through the calibration. The practical application shows that the sections in complicated areas have been well closed through the consistency calibration of three scales, the cross sections of the whole two-dimensional seismic network, especially the comparison of structures and strata. All the corrected profiles have been improved in accuracy and easier to interpret to provide more accurate seismic data for oil and gas exploration.