地震资料相对保真处理方法研究  

Relative amplitude preservation method for seismic data processing

作　　者：王西文[1] 赵邦六[2] 吕焕通[3] 唐东磊 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020 [2]中国石油天然气股份有限公司勘探与生产分公司,北京100007 [3]中国石油天然气股份公司新疆油田分公司,新疆克拉玛依834000 [4]CNPC东方地球物理公司,河北涿州072751

出　　处：《石油物探》2009年第4期319-331,共13页Geophysical Prospecting For Petroleum

摘　　要：在岩性油气藏勘探中,为了能有效识别岩性油气藏,通常要求对地震资料做提高分辨率处理,但过分强调高分辨率和高信噪比会使处理结果的保真度变差。为此,基于准噶尔盆地石东地区一条长8 km的高分辨率数据采集试验测线,通过分析剖面的反射特征和频谱特征,对高分辨率高信噪比处理中存在的问题进行了细致的分析和讨论,认为剖面中出现的薄层反射信息是一种假象。然后利用相对保真地震处理方法重新处理了同一条测线的地震资料,并与高分辨率高信噪比方法的处理结果进行了对比分析和讨论。最后利用两种方法解释的砂体模式建立了正演模型,模拟结果验证了相对保真处理的可信度,并证实了高分辨率高信噪比处理结果中出现的薄层信息不可靠。In lithologic reservoir exploration,in order to effectively recognize lithologic reservoir,the resolution of seismic data is always required to be improved by processing,but putting undue stress on high resolution and high S/N make the fidelity of processing results worse.Therefore,based on an 8 km high resolution testing line from Shidong area in Junggar Basin,through analyzing the reflection signatures and spectrum characteristics,the problems in high resolution and high S/N processing were deeply analyzed and discussed, and the results show that thin-bed reflection information on seismic section is an artifact.Then,relative amplitude preservation processing method was used to re-process the seismic data from the same line,and the results were compared to that of the high resolution and high S/N processing method.Finally,the sandstone pattern interpreted by the two methods was used to establish forward model.The simulation results verified the credibility of relative amplitude -preservation processing,and the thin-bed information in high resolution and high S/N processing results unreliable.

关 键 词：岩性油气藏勘探 高分辨率处理 陷频带 相对保真处理 正演模拟 

分 类 号：P631.4[天文地球—地质矿产勘探]