Kirchhoff叠前时间偏移处理技术及应用
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摘要
随着油气勘探开发程度的不断提高,Kirchhoff叠前时间偏移处理技术已成为高精度地震资料处理的有效手段。该技术具有观测系统适应性强,速度分析快捷,运算效率高,资料成像清晰等特点。在充分认识Kirchhoff叠前时间偏移的方法原理和处理流程的基础上,讨论了其参数选择和速度分析等关键处理技术。实际资料处理结果表明:较叠后偏移剖面,叠前时间偏移剖面成像精度有显著提高,各种地质现象反射特征清楚,能够有效地提高资料解释的准确性。
Kirchhoff prestack time migration has been an effective method for high precision seismic data processing with the progress of oil and gas exploration and development continuously. The migration method has characteristics of strong adaptability for observing system, rapid analysis of velocity, high efficiency of processing and imaging clearly. Based on deep understanding of the methodology and procedures kirchhoff prestack time migration, key processing technologies such as migration parameters and migration velocity analysis are discussed. Compared to poststack time migration, the results of practical data processing using prestack time migration shows that imaging precision of sections are improved greatly, and reflection characteristics of various geological phenomenon can be identified clearly. Prestack time migration can effectively improve the accuracy of data interpretation.
Kirchhoff prestack time migration has been an effective method for high precision seismic data processing with the progress of oil and gas exploration and development continuously. The migration method has characteristics of strong adaptability for observing system, rapid analysis of velocity, high efficiency of processing and imaging clearly. Based on deep understanding of the methodology and procedures kirchhoff prestack time migration, key processing technologies such as migration parameters and migration velocity analysis are discussed. Compared to poststack time migration, the results of practical data processing using prestack time migration shows that imaging precision of sections are improved greatly, and reflection characteristics of various geological phenomenon can be identified clearly. Prestack time migration can effectively improve the accuracy of data interpretation.
引文
[1]马在田.论反射地震偏移成像[J].勘探地球物理进展,2002,25(3):1.
[2]熊煮.复杂地区地震数据处理[M].北京:石油工业出版社,2002.
[3]王棣,王华忠,马在田,等.叠前时间偏移方法综述[J].勘探地球物理进展,2004,27(5):313.
[4]凌云,高军,孙德胜,等.针对不同地质目标的叠前时间偏移成像解释评价[J].石油物探,2006,45(3):217.
[5]VERSTEEG R J.Sensitivity of prestack depth migrationto the velocity model[J].Geophysics,1993,58(6):837.
[6]SCHNCIDER W.Integral Formulation for Migration[J].Geophysics,1978,43(1):49.
[7]曹孟起,刘占族.叠前时间偏移处理技术及应用[J].石油地球物理勘探.2006,41(3):286.
[2]熊煮.复杂地区地震数据处理[M].北京:石油工业出版社,2002.
[3]王棣,王华忠,马在田,等.叠前时间偏移方法综述[J].勘探地球物理进展,2004,27(5):313.
[4]凌云,高军,孙德胜,等.针对不同地质目标的叠前时间偏移成像解释评价[J].石油物探,2006,45(3):217.
[5]VERSTEEG R J.Sensitivity of prestack depth migrationto the velocity model[J].Geophysics,1993,58(6):837.
[6]SCHNCIDER W.Integral Formulation for Migration[J].Geophysics,1978,43(1):49.
[7]曹孟起,刘占族.叠前时间偏移处理技术及应用[J].石油地球物理勘探.2006,41(3):286.
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