西昌盆地地震资料双排列采集及处理实践
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摘要
西昌盆地主要勘探目的层埋藏较深,断裂发育,构造破碎,原有地震资料的信噪比和分辨率较低,无法满足构造解释的需要。为此,针对西昌盆地的地震地质条件,兼顾采集设计要求和工作效率,在新一轮采集中,实施了一种双排列接收的观测系统。应用结果表明,新采集的资料剖面断裂清晰,目的层及其以上各反射层特征清楚,分辨率和信噪比均有较大提高。
The main exploration targets are characterized by small burial depth,developed faults and faulted structures in Xichang Basin.The original seismic data with low signal-to-noise ratio and resolution in the basin can not satisfy the requirements for structure interpretation.For this reason,aimed at the seismic geologic condition and given consideration to the requirements for seismic data acquisition design and work efficiency,an observation system with double seismic spreads has been used in a new round of seismic data acquisition in the basin.Application results show that faults,intended zone and various reflectors above the zone are clear on the newly collected seismic sections,and their resolution and signal-to-noise ratio are improved greatly.
The main exploration targets are characterized by small burial depth,developed faults and faulted structures in Xichang Basin.The original seismic data with low signal-to-noise ratio and resolution in the basin can not satisfy the requirements for structure interpretation.For this reason,aimed at the seismic geologic condition and given consideration to the requirements for seismic data acquisition design and work efficiency,an observation system with double seismic spreads has been used in a new round of seismic data acquisition in the basin.Application results show that faults,intended zone and various reflectors above the zone are clear on the newly collected seismic sections,and their resolution and signal-to-noise ratio are improved greatly.
引文
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[2]邓吉刚,黄小惠,等.西昌盆地二维地震资料重新处理解释总结报告[R],内部报告,2006.
[3]殷继成,张长俊,等.西昌盆地区域勘探前期评价研究[R],内部报告,1993.
[4]曾凡惠,雷金波,邓世新,等.西昌盆地西昌区块二维地震资料处理解释总结报告[R],内部报告,2007.
[5]刘绍裕.四川西昌地区基底结构初探[J].天然气工业,1994(6).
[6]郑鸿明,杨晓海,崔琴,等.基准面校正的理论研究及误差分析[J],新疆地质,2005,23(1);79-81.
[7]刘治凡,毛海波,邵雨,等.复杂地表区基准面和静校正方法的选择[J],石油物探,2003,42(2),240-247.
[8]林伯香,孙晶梅,刘起弘,等.关于浮动基准面概念的讨论[J],石油物探,2005,44(1),94-97.
[9]吴长祥,李忠平,丁士平,塔里木盆地卡3区块二维地震采集技术研究[J],石油物探,2005,44(2),179-182.
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