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为获得全地壳的有效反射信息,深地震反射数据采集常增加大药量的大炮和中炮来提高地球深部反射信息的信噪比;但深地震反射数据处理中用同一套流程和参数无差别的对待大、中、小炮数据,只考虑到大、中、小炮数据共性,忽视了不同激发药量数据间的差异,没深入挖掘和充分利用大炮、中炮数据特性,进而使一些在大、中炮原始数据上有较高信噪比的深部反射信息在常规剖面上却不能很好的体现,甚至不能成像.本文根据大、中炮的特征进行处理对地壳深部结构成像,弥补常规处理中存在的一些不足.并针对大、中炮数据联合处理中的静校正、资料净化、速度求取、AVO加权叠加等技术进行阐述.通过对大、中炮处理剖面与常规剖面对比分析发现,小炮适合中上地壳成像.大炮和中炮深部信噪比较高,有利于中下地壳和上地幔成像,在深地震反射资料处理中须区分对待.
In order to obtain the effective reflection information of the whole crust, the deep seismic reflection data acquisition often increases the large amount of cannons and medium shots to improve the signal-to-noise ratio of deep earth reflection information; however, the same set of processes and parameters are not different in deep seismic reflection data processing The data of large, medium and small artillery only take into account the commonalities of large, medium and small artillery data, neglecting the differences between different stimulated dose data, failing to tap and make full use of the data characteristics of artillery and medium artillery, The deep reflection information with high signal-to-noise ratio (SNR) in the large and medium shots can not be well represented or even can not be imaged in the conventional data.This paper deals with the deep structure imaging of the crust according to the characteristics of large and medium shots, And deal with some shortcomings.Meanwhile, the technologies of static correction, data purification, speed seeking, AVO weighted superposition and so on in the joint processing of large and medium cannonballs are elaborated.By comparing the processing profiles of large and medium cannonballs with the conventional sections, , The small artillery is suitable for the imaging of the middle and upper crust, and the high signal-to-noise ratio of the deep cannon and medium gun is favorable for the imaging of the middle and lower crust and the upper mantle. During the deep seismic reflection data processing, Treatment.