中文摘要：

为了充分利用大炮检距信息对复杂地质条件下的地下构造进行叠加成像,基于传统的零偏移距共反射面元（ZO CRS）叠加提出共偏移距共反射面元（CO CRS）叠加方法。对叠加剖面的每个成像点确定叠加算子相应的5个参数是CO CRS叠加方法的关键,采用多参数分步搜索策略,在不同道集中分别搜索相关叠加参数,能够减少COCRS叠加方法的运行时间,有效解决实际生产中计算效率低的难题。模型试算结果证明基于CO CRS叠加得到的成像剖面与传统ZO CRS叠加剖面相比有着较高的信噪比和同相轴连续性,验证了搜索方法的有效性和实用性。

英文摘要：

In order to fully utilize the far-offset information to obtain the stacked section of the subsurface in complicated geological conditions,the common-offset common-reflection-surface（CO CRS） stack was developed based on the conventional zero-offset common-reflection-surface（ZO CRS） stack.Determining the corresponding five parameters of stacking operator for every imaging point in the stack section is the key of CO CRS stacking method.By using split strategy for searching parameters,i.e separately searching the related stacking parameters in different gathers,the calculation time of CO CRS stack reduces and the difficulty of computational efficiency is effectively resolved in the actual application.The application results on model data show that compared with the image section by the conventional ZO CRS stack,the image section by CO CRS stack is relatively good in the aspect of signal-to-noise ratio and the continuity of reflection event,which proves the effectiveness and practicability of this searching algorithm.