PSEUDOREFLECTION PROFILING METHOD: AN EFFICIENT COMPLEMENT TO CDP METHOD1
PSEUDOREFLECTION PROFILING METHOD: AN EFFICIENT COMPLEMENT TO CDP METHOD1
复制标题
伪反射分析方法：CDP 方法的有效补充1
DOI：
10.1111/j.1365-2478.1992.tb00362.x
复制
发表时间：
1992
影响因子：
2.6
通讯作者：
T. Tsutsui
中科院分区：
文献类型：
--
作者：
T. Tsutsui
提出了一种伪反射剖面(PRP)方法。通过使用传输地震记录，该方法产生了与使用公共深度点(CDP)方法获得的时间剖面相似的时间剖面。
假反射剖面是使用以下步骤获得的。利用场地和基岩上的地震记录，通过维纳滤波估计得到了软岩上场地的等效传输响应。将这些响应代入到Claerbout-uketz方程中，得到了伪反射分布。
将PRP方法应用于爆炸地震记录，得到了三维地下模型。由此得到的时间剖面与邻近地区用CDP方法得到的时间剖面一致。用这种方法获得相干剖面的最大站间距估计为透射波波长的四分之一。
这项技术应该与另一种方法如CDP法结合使用，因为它有两个缺点：不能直接获得速度结构，不能通过处理消除不需要的波。
A method for pseudoreflection profiling (PRP) is presented. By using transmission seismograms, this method produces time sections similar to those obtained using the common depth point (CDP) method.
Pseudoreflection profiles are obtained using the following procedure. Equivalent transmission responses at sites on soft deposits are derived by Wiener filter estimation using seismograms acquired on the sites and on the basement rock. These responses are substituted into the Claerbout-Kunetz equation to obtain the pseudoreflection profiles.
A 3D subsurface model is produced when the PRP method is applied to explosion seismograms. The time sections thus obtained are consistent with those obtained using the CDP method in a neighbouring area. The maximum station interval for obtaining coherent profiles with this method is estimated to be one quarter of the wavelength of the transmitted waves.
This technique should be used in combination with another method such as the CDP method because it has two weak points: the velocity structure cannot be obtained directly and undesirable waves cannot be eliminated through processing.