摘要
多尺度地震资料在油藏地球物理中发挥着重要的作用,通过开展单程波正演模拟并对模拟结果进行偏移,有利于深入剖析多尺度地震资料之间的联系与差异.正演模拟表明,地面地震资料、VSP资料和井间地震资料三种尺度的地震资料都是相同地下地质体对应于该观测尺度下的地震波响应特征,差异在于由于观测方式的不同,资料所包含的波场信息丰富程度不一样,反映地质体信息的范围不一样,在分辨能力上具有一定的差异性.地面地震资料具有较强的横向连续性但纵向分辨率低,VSP资料具备比较精确的时深关系,井间地震资料分辨率高但是覆盖范围小,对三种多尺度地震资料开展综合研究有利于更好的揭示地下地质信息.
The multiscale seismic data is very important in the reservoir geophysics. With forward modeling of the one-way waves for multiple-scale observations, compareing with the wave field, common shot gathers and migrated section characteristics, the relationship and difference among multiscale seismic data can be recognized. The relationship of multiscale seimic data is the seismic wave reflection response to the same geological body under different observation ways. The difference is due to the taried wave field information richness, geological ranges and detailed characteristics in the multiscale seismic data. The surface seismic data has good lateral continuity and low resolution. The VSP data has good time-depth relationship. The crosswell seismic data has high resolution and a small lateral range. Integrated study with the data of three different scales can reveal more geological information.
出处
《地球物理学进展》
CSCD
北大核心
2010年第4期1306-1312,共7页
Progress in Geophysics
基金
国家重点基础研究发展计划(973计划)项目(2007CB209605)
国家科技重大专项项目(2008ZX05030-004-01)联合资助
关键词
单程波
正演模拟
多尺度地震资料
one way wave, seismic modeling, multiscale seismic data
