江陵凹陷三维连片地震资料一致性处理实践

Consistency Processing of 3D Continuous Seismic Data among the Blocks in Jiangling depression

江陵凹陷是良好产油区,李家台地区连续勘探了多块三维地震资料,受复杂地表地震条件和施工因素影响,各区块间存在地震资料特征不一致问题。首先要提高原始地震资料信噪比,采用互相关分析、地表一致能量补偿和反褶积、匹配滤波等方法进行连片一致性处理,使各区块间信号特征达到一致,再利用傅里叶变换重构缺失信号,将面元属性均化,处理得到的地震剖面中深层同相轴连续性较好,目的层新沟咀组可连续追踪,断坳结构清晰。

Jiangling depression is a good oil-producing area,in Lijiatai area of which the multi-block 3-D seismic data has been continuously acquired.Owing to the influence of complex surface seismic conditions and operation factors,the characteristics of seismic data are not consistent among the blocks.Firstly by improving the signal-to-noise ratio of the original seismic data and using such methods as correlation analysis,subsurface-surface consistent energy compensation,deconvolution,matching filtering and others,the consistent signal characteristics among the blocks are achieved;the missing signal is reconstructed by Fourier transform and the bin properties are homogenized.The final results from the seismic profile show that the continuity of the deep seismic events is better,the Xingouzui Formation of the target layer can be traced continuously and the fault depression structure is clear.