独立同步激发数据两步法邻炮干扰压制技术研究
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摘要
地震资料品质在很大程度上取决于覆盖次数的高低,而覆盖次数的提高必然会带来勘探成本的增加。为了解决这一难题,以可控震源独立同步激发(ISS)为代表的新一代高效采集技术得到了推广应用,极大地提高了生产效率。但ISS技术会产生很强的邻炮干扰,需要在资料处理中予以压制。较详细地分析了ISS资料邻炮干扰的特点和分布规律,发现邻炮干扰在不同道集中有不同的表现形式,因此需要进行多域分步压制。通过资料分析和处理试验,提出了两步法压制邻炮干扰的处理流程,即分别采用强振幅分频压制技术和中值滤波技术来实现ISS数据中邻炮干扰的压制,并在实际资料处理中得到了很好的应用效果。
Quality of seismic data depends on the fold to some degree.Higher fold means higher cost.In order to solve this problem,vibroseis independently simultaneous shooting(ISS),as a representative of high-productivity acquisition techniques,has been widely used.However,ISS may cause strong neighboring-shot interference,which should be suppressed in data processing.We analyzed the characteristics of ISS neighboring-shot interference and its distribution in detail,and discovered that neighboring interference changes via the gathers.So multi-domain multi-step de-noising should be carried out.By data analysis and processing testing,a two-step suppressing method was proposed,that is by separately adopting strong-amplitude frequency-division suppressing and median-filtering technique to suppress the neighboring-shot interference.A good result has been achieved in actual application.
Quality of seismic data depends on the fold to some degree.Higher fold means higher cost.In order to solve this problem,vibroseis independently simultaneous shooting(ISS),as a representative of high-productivity acquisition techniques,has been widely used.However,ISS may cause strong neighboring-shot interference,which should be suppressed in data processing.We analyzed the characteristics of ISS neighboring-shot interference and its distribution in detail,and discovered that neighboring interference changes via the gathers.So multi-domain multi-step de-noising should be carried out.By data analysis and processing testing,a two-step suppressing method was proposed,that is by separately adopting strong-amplitude frequency-division suppressing and median-filtering technique to suppress the neighboring-shot interference.A good result has been achieved in actual application.
引文
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[2]王井富,徐学峰,关业志.可控震源高效采集技术简介及对装备的需求[J].物探装备,2010,20(2):106-109,116Wang J F,Xu X F,Guan Y Z.High efficient vibratoracquisition technology introduction and the demandfor equipment[J].Equipment for Geophysical Pros-pecting,2010,20(2):106-109,116
[3]倪宇东,王井富,马涛,等.可控震源地震采集技术的进展[J].石油地球物理勘探,2011,46(3):349-356Ni Y D,Wang J F,Ma T,et al.Advances in vibroseisacquisition[J].Oil Geophysical Prospecting,2011,46(3):349-356
[4]魏铁,张慕刚,汪长辉,等.可控震源高效采集技术及在国际项目中的应用[J].石油科技论坛,2012(2):7-10Wei T,Zhang M G,Wang C H,et al.High-produc-tivity vibroseis techniques and their application in in-ternational seismic projects[J].Oil Forum,2012(2):7-10
[5]Howe D,Foster M,Allen T.Independent simultane-ous sweeping:a method to increase the productivityof land seismic crews[J].Expanded Abstracts of78th Annual Internat SEG Mtg,2008,2826-2830
[6]Howe D,Foster M,Allen T.Independent simultane-ous sweeping in Libya:full scale implementation andnew developments[J].Expanded Abstracts of 79thAnnual Internat SEG Mtg,2009,109-111
[7]Huo S,Luo Y,Kelamis P G.Simultaneous sourcesseparation via multi-directional vector median filter[J].Expanded Abstracts of 79th Annual InternatSEG Mtg,2009,31-35
[8]蔡希玲.声波和强能量干扰的分频自适应检测与压制方法[J].石油地球物理勘探,1999,34(4):373-380Cai X L.An effective method to suppress acousticwave and high energy noise frequency-divisionallyand adaptively[J].Oil Geophysical Prospecting,1999,34(4):373-380
[9]王君,周兴元,恽春华.地表一致性约束下异常振幅衰减技术的实现[J].石油物探,2011,50(5):493-498Wang J,Zhou X Y,Hui C H.Realization of surfaceconsistent constrained anomaly amplitude attenua-tion technology[J].Geophysical Prospecting for Pe-troleum,2011,50(5):493-498
[10]刘伟,曹思远,王征,等.随机噪声的多尺度多方向域压制方法研究[J].石油物探,2011,5(3):301-306Liu W,Cao S Y,Wang Z,et al.Multi-scale&multi-direction suppressing method for random noise[J].Geophysical Prospecting for Petroleum,2011,5(3):301-306
[11]刘明乾,于相海,周夏丽,等.非纵测线地震资料相干噪声压制[J].石油物探,2011,50(3):307-309,318Liu M Q,Yu X H,Zhou X L,et al.Coherent noiseattenuation in broadside seismic data[J].Geophysi-cal Prospecting for Petroleum,2011,50(3):307-309,318