Abstract：In combination with development difficulties in Keng-71 work zone, the paper studied 3D VSP acquisition method in a way of well-ground joint acquisition, proved the selecting method of 3D basic acquisition parameters (max offset, depth of geophone, level interval and shot interval) and defined concrete acquisition parameters; studied the influence of variation of acquisition parameters on bin distribution by analytic technique of geometry attribute, checked reasonableness of parameter selection; and carried out the study of 3D VSP numeric modeling. The forward simulation showed the geometry has good ability for target imaging; using this set of acquisition techniques acquired 3D VSP raw data with higher S/N ratio, abundant wavefield, distinguishing direct wave and reflection wave. The processing results showed that 3D VSP technique has clear superiority of 3D VSP technique in clarifying minor structure and minor fault. The 3D VSP design and forward simulation techniques based on geologic model and velocity model can acquire optimum geometry solving geologic task.
刘美丽, 于雪莲, 曹齐放, 马波. 垦71井区三维VSP采集方法及效果[J]. 石油地球物理勘探, 2008, 43(增刊2): 44-49.
Liu Mei-li, Yu Xue-lian, Cao Qi-fang, Ma Bo. 3D VSP acquisition method in Keng-71 well-zone and effect. OGP, 2008, 43(增刊2): 44-49.
