The Research And Practice Of High Precision Acquisition Technology Facing Development Seismology

For the development of fine exploration,the purposes is based on the lithologic oil and gas reservoirs,the complex fault block reservoirs,subtle reservoir etc.Seismic acquisition of spatial sampling density is higher,as well as the processing and interpretation of the original data requirements are higher.Geometry is the first carrier of high precision 3D seismic exploration technology,which is the primary vector of seismic acquisition data quality,is the foundation of the seismic acquisition and data processing.Development seismic is faced with the more complicated geology tasks and requirements,meanwhile having a higher demand on observation methods.Bicycle-like subdivision bin geometry compares with the conventional 3D geometry;its obvious advantage is that the more uniform offset,the more uniform azimuth and lower cost.The method is a new bin subdivision style;its horizontal fold is twice the conventional subdivision,so the way is good at acquiring cross information.The near-surface of alluvial plain coverage area is complex,variety of litholog y alternating deposition.That makes differences in shot quality significantly and long-term constraints to enhance seismic data of high quality precision.In recent years,through the in tegrat-ed application of geology,geotechnical engineering,logging engineering theories an d methods,we have a clear understanding of near-surface structure gradually.Through this research,we form a new understanding of the near-surface velocity,ghost,lithology and th e relations between the three factors.We form a technology of multi-factor excitation depth constraint design through analyzing the three factors and its excitation frequency response characteristics.The design technology has been applied in many blocks in Sheng li explor ation area and achieved good results.