城区勘探中激发药量对地震数据品质的影响及处理对策——以中国东部某油田CY城区为例

摘要

为了解决不同药量激发对地震数据品质的影响,在室内处理中进行了系统的分析和试验,通过对地震数据的自相关统计、频率统计、能量统计等综合分析,找出激发药量与地震波特征的相关性,并在工区内采用点—线—面的分析方式说明激发药量变化对地震数据品质的影响. 根据上述分析思路,在数据处理中,提出了量化分析与迭代处理等技术思路,应用时频域球面发散与吸收补偿、地表一致性振幅和地表一致性反褶积技术,解决了不同药量激发对地震数据品质的影响,得到了较好的处理效果,为CY城区老油田的增产上储提供了可靠的地震资料.%In order to solve the influence of different doses of explosive excitation on seismic data quality,the authors analyzed and test-ed the seismic data in indoor processing.Using such means as autocorrelation statistics,frequency statistics,and energy statistics of the seismic data,the authors found the correlation of explosive excitation weight and seismic wave characteristics and,by way of point-line-plane analysis,revealed the changes related to seismic data quality.On such a basis,the authors put forward the quantitative analysis and iterative processing technology in data processing and,by application of spherical divergence and absorption time and frequency domain compensation as well as the surface consistent amplitude and surface consistent deconvolution technique,the authors solved the problem of the influence of different doses of explosive excitation on the quality of seismic data with relatively satisfactory processing effect.The results provide reliable seismic data for the increasing production of the old oilfield in CY City