摘要
在地震叠前资料处理中,各种噪音的衰减和压制是十分重要的步骤,直接决定了后续地震剖面的质量,因此采用各种噪音衰减技术对面波、线性干扰等进行压制十分必要。GeoEast是一款十分成熟的地震资料处理解释软件,针对GeoEast的叠前去噪技术,首先研究了该软件的几种叠前去噪技术,包括异常振幅压制技术(WildAmpAtten模块)、叠前线性干扰压制技术(LinNoiRemv模块)、叠前相干噪音压制技术(CohNoiAtten模块)、局域滤波去面波技术(ZoneFilt模块)等;然后应用上述4种技术对陆上二维地震资料进行去噪处理,对每种技术的去噪效果进行比较分析,优化了一套叠前去噪技术组合方案:首先,利用异常振幅压制技术(WildAmpAtten模块)将炮集中的强振幅的面波噪音进行衰减;然后,在压制了强振幅噪音的基础上对线性干扰进行衰减,即采用叠前线性干扰压制技术(LinNoiRemv模块)和叠前相干噪音压制技术(CohNoiAtten模块);最后,采用局域滤波去面波技术(ZoneFilt模块)将残余的面波进行压制。将上述叠前去噪技术组合方案应用到实际地震资料处理中,通过对比去噪前、后的二维叠加地震剖面,结果证明该组合方案能够使面波、线性干扰等噪音得到较好的压制。
In seismic pre-stack data processing,the attenuation and suppression of various noises is a very important step,which directly determines the quality of the subsequent seismic profile,so it is necessary to use various noise attenuation techniques to suppress the surface wave and linear interference.GeoEast is a very mature software for seismic data processing and interpretation.In view of GeoEast’s pre-stack denoising technology,several pre-stack denoising technologies of GeoEast were studied first,including anomaly amplitude suppression technology(WildAmpAtten module),pre-stack linear interference suppression technology(LinNoiRemv module),pre-stack coherent noise suppression technology(CohNoiAtten module),local filter surface wave removal technology(ZoneFilt module),etc.Then,the above four techniques were used to denoise the 2D seismic data on land,the denoising effect of each technique was compared and analyzed,and a set of pre-stack denoising technique combination scheme was optimized.First,the abnormal amplitude suppression technique(WildAmpAtten module)was used to attenuate the surface wave noise of strong amplitude in the shot gathers.Then,on the basis of suppressing the strong amplitude noise,the linear interference was attenuated,that is,the linear interference suppression technology(LinNoiRemv module)and the coherent noise suppression technology(CohNoiAtten module)were used.Finally,the residual surface waves were suppressed by local filter surface wave removal(ZoneFilt module).By comparing the two dimensional superimposed seismic profiles before and after denoising,the results show that the combined scheme can suppress surface wave,linear interference and other noises.
作者
邬世英
杨博
WU Shiying;YANG Bo(College of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,Hubei)
出处
《长江大学学报（自然科学版）》
2023年第6期49-55,共7页
Journal of Yangtze University(Natural Science Edition)
基金
国家自然科学基金项目“基于经验模态分解的自由表面多次波衰减方法研究”(41804140)。
