【摘要】 通过野外试验和调查 ,查明了垦东地区的表层是一种低速泥层与高速沙板层的互层结构。这种地质结构导致采集的地震资料包含大量的多次波。为了消除多次波的影响 ,从斯奈尔定律出发推导出多次折射盲区的斜率表达式、多次波的表达式及其叠加特性公式 ,并对薄互层地质结构产生的多次反射波和多次折射波进行了描述。结合本区的试验资料 ,探讨了该区地震资料采集方法 ,形成一套可避免多次波影响 ,且具有可操作性和适应性的野外工作方法 ,对生产设计和施工作业具有很好的指导意义更多还原

【Abstract】 Field study reveals that the near surface structure in Kendong, Shengli Oilfield consists of interbeds of low velocity mud formation and high velocity sands. This structure results in a great of multiples in seismic data. In order to get rid of the effects of multiples, we derived the slope expression of multiple refracted wave in blind area, expression of multiple wave and its stacking property from Snell’s law. The multiples and refracted waves from thin interbeds are then discriminated. Based on field study, a suite of acquisition methods has been developed. These methods can be used in other areas with similar geologic setting.更多还原