Abstract：Data gap in offset VSP CDP section is often found in the data processing. Theoretical model and real data analysis confirm that the data gap is caused due to the fact that conventional wave field separation manner suppresses the upgoing wave whose apparent velocity approximates to the velocity of downgoing wave because of shortened geophone intervals. Hence,trace-gathering wave field separation method is used,which greatly improves the S/N ratio of upgoing wave in processing the VSP data collected using shortened geophone intervals.
何惺华, 邓金华. 变检波点距VSP资料的抽道分组波场分离方法[J]. 石油地球物理勘探, 1994, 29(1): 59-68.
He Xinghua, Deng Jinhua. Trace-gathering wave field separation of VSP data collected using different geophone intervals. OGP, 1994, 29(1): 59-68.
