The Study On Seismic Noise Analysis And Processing Methods In Fuyang Area

Fuyang Area,a faulted basin on the stable platform in north China,is mainly formed during Mesozoic and Cenozoic,and it is of good exploration potential.However,oil and gas discovery is rare.Analysis shows that the poor quality of seismic data is the key factor.The complex surface condition such as town,village,factory,river,fish pond,traffic,power grid etc.increases the difficulties in data accumulation and processing.Aiming at the imaging of Paleozoic strata in Fuyang,based on summary of former methods,noise causes analysis,characters research on multiple reflected refraction and surface wave are made,and processing flow is improved.In this paper,the adaptive strong energy surface wave suppression method is proposed,while the multi-domain subtraction method is used to suppress the multiple refraction waves and related noise.The refraction wave is used in deep velocity analysis and shallow velocity modeling.The new DMO processing flow and parameters are determined,which improves the imaging of the deep target layer.The significant imaging improvement provides reliable evidence for following exploration and development.