三维连片处理技术在煤田勘查中的应用
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摘要
煤田三维地震勘探在一个井田内一般多采用分期分块的勘探方式,然后将分散的解释成果拼接成整个区域的构造图。这种方式往往对连接部分的构造形态把握不准。连片处理技术则是将相邻的多个地震资料处理成一个数据体,统一解释。经连片处理后的资料大大避免了边界效应,加大了资料的可利用量,提高了区域构造解释的精度。三维地震资料连片处理的关键技术是解决各区块间观测系统的整合,以及原始资料在振幅、相位及波形上的一致性等问题。在梁宝寺一号井4块勘探区共计14.55km2的三维地震资料的连片处理中,首先统一坐标系内,重新划分面元,并且采取了全区统一校正、振幅均衡及子波形一致性整形处理等技术,以确保各个采区地震信号的运动学特征和动力学特征的一致性。经连片处理后其叠加剖面在拼接处的振幅、频率、相位特征一致性较好,无拼接痕迹,取得了较好的处理效果。
The coalfield 3D seismic prospecting in a same minefield is usually adopted by stages and partitioning,then put all scattered interpreted results into structural map of whole area.The structural configuration interpreted by this way in linking section is inaccurate very often.Multi-survey joint processing techniques unite several joining seismic data into a whole data volume,and has it unified interpreted.After multi-survey joint processing,data boundary effects are turned away greatly,available data are increased,and regional structure interpretation is more accurate.The key technique of multi-survey joint processing is to solve the problem of geometry integration of sub-areas and raw data consistency of amplitude、phase and wave form.Using this method,we have obtained the good effect of 3D seismic data in 4 blocks(total 14.55 Km2) in Liangbaosi No.1 minefield.
The coalfield 3D seismic prospecting in a same minefield is usually adopted by stages and partitioning,then put all scattered interpreted results into structural map of whole area.The structural configuration interpreted by this way in linking section is inaccurate very often.Multi-survey joint processing techniques unite several joining seismic data into a whole data volume,and has it unified interpreted.After multi-survey joint processing,data boundary effects are turned away greatly,available data are increased,and regional structure interpretation is more accurate.The key technique of multi-survey joint processing is to solve the problem of geometry integration of sub-areas and raw data consistency of amplitude、phase and wave form.Using this method,we have obtained the good effect of 3D seismic data in 4 blocks(total 14.55 Km2) in Liangbaosi No.1 minefield.
引文
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[2]张宝金.去噪强度、去噪效率与振幅保真[J].石油地球物理勘探,2002,37(1):1-5.
[3]张颖,等.三维地震资料连片处理技术及应用效果[J].石油勘探与开发,2002.29(6):58-60.
[4]陆基孟.地震勘探原理[M].北京:石油工业出版社,1991.
[5]赵生斌.可分面元三维观测系统设计研究[J].石油地球物理勘探,2000,35(3).
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