LT区低信噪比地震资料现场处理方法
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摘要
针对LOTUS区块的地震资料,研究了复杂地表区低信噪比地震资料现场处理的方法。在大量的试验和分析的基础上,采用高程静校正与折射静校正相结合的方法,有效解决了因地表起伏大、低降带速度和厚度剧烈变化引起的野外静校正问题。对于面波、低频干扰,规则线性干扰等造成的地震资料信噪比降低进行了针对性的压制和消弱。采用地表一致性反褶积技术基本解决了因激发和接收条件引起的不同炮集记录上的地震波属性的变化。总结了一套适合该区地震资料现场处理的方法和流程。
In this paper,the problems of static correction and low signal/noise ratio in the complex surface seismic data were analyzed and studied on the basis of large quantities of experiments and analyses.The method in which the datum static correction is combined with the refraction static correction was adopted for effectively solving the problem of field static correction caused by the complex surface and low velocity layer.Such factors as surface wave,low-frequency disturbance and regular linear disturbance resulting in low signal/noise ratio of the seismic data were successfully suppressed.The difference in the wavelet of shots was solved effectively with the surface consistency deconvolution technique.
In this paper,the problems of static correction and low signal/noise ratio in the complex surface seismic data were analyzed and studied on the basis of large quantities of experiments and analyses.The method in which the datum static correction is combined with the refraction static correction was adopted for effectively solving the problem of field static correction caused by the complex surface and low velocity layer.Such factors as surface wave,low-frequency disturbance and regular linear disturbance resulting in low signal/noise ratio of the seismic data were successfully suppressed.The difference in the wavelet of shots was solved effectively with the surface consistency deconvolution technique.
引文
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[8]许冬梅,曲安江,冯和平,等.迭代折射静校正技术在鄂北地震资料处理中的应用[J].物探与化探,2005,29(3):261.
[9]杨文军.欧北地区深层三维地震采集技术[J].物探与化探,2008,32(1):57.
[2]陆基孟.地震勘探原理[M].东营:石油大学出版社,1996:42.
[3]徐成明,徐爽.三维地震勘探在湖泊沼泽地区的应用[J].物探与化探,2002,26(1):42.
[4]黄中敏,游洪文,孟小红.阿曼36、38区块低信噪比地震资料处理技术[J].石油天然气学报,2007,29(1):63.
[5]崔汝国,王彦春,曹国滨,等.胜利油田滩浅海地区地震勘探技术[J].物探与化探,2006,30(5):441.
[6]李楠,屠志慧,刘微.山地低信噪比地震资料处理研究[J].天然气勘探与开发,2007,30(1):24.
[7]段洪有,朱丕跃.焉耆盆地低信噪比地震资料处理方法[J].物探与化探,1999,23(4):265.
[8]许冬梅,曲安江,冯和平,等.迭代折射静校正技术在鄂北地震资料处理中的应用[J].物探与化探,2005,29(3):261.
[9]杨文军.欧北地区深层三维地震采集技术[J].物探与化探,2008,32(1):57.
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