High-resolution image of crosshole reflection waves
Fang Wubao, Chen Lin, Guan Luping
Fang Wubao,Research Institute of Petroleum Geophysical Exploration, Ministry of Geology and Minerals, No. 21Weigng, Nanjing City,Jiangsu Province, Postcode：210014
Abstract：In view of the complexity of crosshole seismic wavefield,crosshole tomographic image can be usually achieved by using first break time. Applying VSP data processing technique to crosshole seismic data,we accomplished crosshole image of upgoing and downgoing reflection waves of two common-shot trace gathers and two commonreceiver trace gathers,finally obtaining satisfactory high resolution sections. It isanalytically shown that the resolution of this kind of section is four or five times higher than the resolution of VSP section. This technique effectively increases the applicability of raw data.
