柴达木盆地三湖地区地震采集方法探讨
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摘要
柴达木盆地三湖地区富含天然气藏,以往在地震数据采集中多采用突出炮点、检波点组合作用的方法压制和削弱干扰波,难以达到预期效果。如今采用高精度地震勘探,突出观测系统的优化设计,并利用地震数据处理中的水平叠加进行噪声压制,充分提高地震数据的信噪比和分辨率。本文针对目标工区地质任务及地震勘探难点,对比研究噪声干扰特性,剖析以往地震勘探中存在的问题,并论述了叠加响应对高精度地震勘探所起的积极作用,为该区天然气勘探提供高质量、高精度地震数据。
There are rich gas accumulation in Sanhu area Qaidam Basin.In the past,the composed way of shot patterns and receiver arrays are used to attenuate the noise in the seismic data acquisitions.But it couldn't achieve the expectations.For improving the signal-to-noise ratio and the resolution of the seismic data,the optimized geometries are designed in the high-precision seismic exploration,and attenuate the noise with the horizontal stacking in the data processing today.Considering the geological tasks and the difficulties of the seismic in SanHu area,we research the noise characteristics and the shortages in the past seismic,and also discuss the better actions of the stack response in the high-precision seismic,for supplying the high quality and the high precision seismic data in this area.
There are rich gas accumulation in Sanhu area Qaidam Basin.In the past,the composed way of shot patterns and receiver arrays are used to attenuate the noise in the seismic data acquisitions.But it couldn't achieve the expectations.For improving the signal-to-noise ratio and the resolution of the seismic data,the optimized geometries are designed in the high-precision seismic exploration,and attenuate the noise with the horizontal stacking in the data processing today.Considering the geological tasks and the difficulties of the seismic in SanHu area,we research the noise characteristics and the shortages in the past seismic,and also discuss the better actions of the stack response in the high-precision seismic,for supplying the high quality and the high precision seismic data in this area.
引文
[1]李庆忠著.走向精确勘探的道路.北京:石油工业出版社,1994
[2]Gijs J O Vermeer著;李培明,何永清译.三维地震勘探设计.北京:石油工业出版社,2008,10～70
[3]罗岐峰,彭章池,王海立等.重新认识地震组合的作用.石油地球物理勘探,2008,43(3):257～264Luo Qi-feng,Peng Zhang-chi,Wang Hai-li et al.Un-derstanding role of seismic geophone array again.OGP,2008,43(3):257～264
[4]李彦鹏,孙鹏远,魏庚雨等.利用陆上三分量数据改善气云区构造成像.石油地球物理勘探,2009,44(4):417～424Li Yan-peng,Sun Peng-yuan,Wei Geng-yu et al.Using3Cland seismic data improve structural imaging in gaschimney area.OGP,2009,44(4):417～424
[5]陆基孟主编.地震勘探原理.山东东营:石油大学出版社,2001
[2]Gijs J O Vermeer著;李培明,何永清译.三维地震勘探设计.北京:石油工业出版社,2008,10～70
[3]罗岐峰,彭章池,王海立等.重新认识地震组合的作用.石油地球物理勘探,2008,43(3):257～264Luo Qi-feng,Peng Zhang-chi,Wang Hai-li et al.Un-derstanding role of seismic geophone array again.OGP,2008,43(3):257～264
[4]李彦鹏,孙鹏远,魏庚雨等.利用陆上三分量数据改善气云区构造成像.石油地球物理勘探,2009,44(4):417～424Li Yan-peng,Sun Peng-yuan,Wei Geng-yu et al.Using3Cland seismic data improve structural imaging in gaschimney area.OGP,2009,44(4):417～424
[5]陆基孟主编.地震勘探原理.山东东营:石油大学出版社,2001
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