溱潼凹陷三维地震资料联片处理技术和效果分析
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摘要
溱潼凹陷工区包括10块三维地震资料,每块资料的处理成果数据之间在分辨率、信噪比、波组特征等方面存在较大差别,尤其是各区块结合部位存在着严重的边界效应,这给全区统一的构造解释、岩性处理和解释造成一定的困难。针对各区块处理成果资料之间存在的各种不一致性、边界效应及成像问题,采取了一系列措施。为确定处理方位角和扩展半径,采用了面元均化技术;为达到能量的一致性,采用了地表一致性,振幅补偿技术;为提高资料分辨率和统一全区频率,采用了不同的反褶积技术;为提高资料信噪比,采用了噪音自动识别与压制和动校CMP道集迭代校正等技术;为正确归位、准确成像,采用了DMO和偏移技术。这些技术的应用,解决了不同三维边界处的拼接问题,有效地提高了原三维资料的处理质量,得到了统一的成果数据体。
The unified data processing project involves in 10 3D seismic data sets. The great differences in the data sets in resolution, S/N ratio, and characters of wave groups, especially the boundary effects in the joint regions of different data sets bring about difficulties in u-nified structural interpretation, and lithologic processing and interpretation. This paper discusses the measures used in the unified data processing project. Re-binning is implemented for the determination of azimuth and extended radius. Surface consistent amplitude compensation is performed to attain energy consistency. A variety of deconvolution techniques are a-dopted to improve data resolution and unify the frequency on the whole area. Noise autodetection and suppression as well as iterative CMP gather moveout correction is carried out to enhance S/N ratio. DMO and migration are implemented for accurate positioning and imaging. Theses measures satisfactorily resolved the problem of piecing together different 3D data sets.
The unified data processing project involves in 10 3D seismic data sets. The great differences in the data sets in resolution, S/N ratio, and characters of wave groups, especially the boundary effects in the joint regions of different data sets bring about difficulties in u-nified structural interpretation, and lithologic processing and interpretation. This paper discusses the measures used in the unified data processing project. Re-binning is implemented for the determination of azimuth and extended radius. Surface consistent amplitude compensation is performed to attain energy consistency. A variety of deconvolution techniques are a-dopted to improve data resolution and unify the frequency on the whole area. Noise autodetection and suppression as well as iterative CMP gather moveout correction is carried out to enhance S/N ratio. DMO and migration are implemented for accurate positioning and imaging. Theses measures satisfactorily resolved the problem of piecing together different 3D data sets.
引文
1 邬达理,郑伟健,金晓雷,等.复杂三维地震资料联片处理技术及其应用实例分析[J].石油物探,2001,40(1) :9-19
2 邬达理,杨子兴,朱文杰.复杂条件下三维地震资料处理中的几个关键问题[J].石油物探,2002,4l(2) :179-185
2 邬达理,杨子兴,朱文杰.复杂条件下三维地震资料处理中的几个关键问题[J].石油物探,2002,4l(2) :179-185
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