摘要
在非零井源距VSP资料处理过程中,经常发现VSPCDP剖面上出现资料空缺现象,经理论模型和实际资料分析,确认是由于检波点距加密而造成上、下行波视速度相近,常规波场分离手段对上行波的压制作用所致。据此提出一种新的抽道分组波场分离方法。该方法用于变检波点距VSP资料处理,可有效地提高小点距并段上行波的信噪比。
Data gap in offset VSP CDP section is of ten found in the data processing. Theoretical model and real data analysis confirm that the data gap is caused due to thefact that conventional wave field separation manner suppresses the upgoing wavewhose apparent velocity approximates to the velocity of downgoing wave because ofshortened geophone intervals. Hence,trace-gathering wave field separation methodis used,which greatly improves the S/N ratio of upgoing wave in processing theVSP data collected using shortened geophone intervals.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
1994年第1期59-68,共10页
Oil Geophysical Prospecting
关键词
垂直地震剖面
波场
分离
检波点
vertical seismic profiling, nonzero offset, wave field separation, mid value filtering, two-dimensional filtering, trace gathering