地震资料处理方法的叠前保幅性研究  

Pre-stack amplitude-preserved ability about several seismic data processing methods

作　　者：王靖[1] 孙赞东[2] 吴杰[1] 苏勤[1] 臧胜涛[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,兰州730020 [2]中国石油大学(北京)地质与地球物理综合研究中心,北京102249

出　　处：《岩性油气藏》2016年第3期105-112,共8页Lithologic Reservoirs

基　　金：国家重大科技专项"下古生界-前寒武系碳酸盐岩储层与流体地震描述技术"(编号:2016ZX05003-003)资助

摘　　要：地震资料的保幅性是叠前反演和储层预测的重要前提。为了研究叠前处理方法的保幅性,以球面扩散补偿、偏移距规则化处理及偏移后的道集切除等处理环节为例,从不同方面深入研究了它们对保幅性的影响。首先从理论上分析了这些处理环节的保幅性,再以实际资料为例,对比了处理前、后的地震剖面和道集变化,并进一步重点研究了目标层位AVO振幅曲线变化及其对弹性参数计算结果造成的影响。结果表明,研究处理方法的保幅性十分必要,球面扩散补偿、偏移距规则化处理以及偏移后的道集切除方式对地震资料的保幅性及叠前AVO反演均具有重要的影响。The amplitude-preserved processing has a great significance on reservoir and liquid prediction.In order to study the amplitude-preserved ability of pre-stack processing method,some processing methods including geometry compensation,offset regularization and gather muting,were taken for example and studied in details in many aspects.Firstly the degree of amplitude preservation of these details in theory was analyzed.Then taking the seismic data processing of practical survey for example,the seismic profiles and gathers before and after processing were compared,and the change of AVO amplitude curves in target horizon was analyzed and the effects of these details on the elastic parameters calculation were evaluated.The result shows that to study the amplitude-preserved ability of pre-stack processing method is necessary,and geometry compensation,offset regularization and gather muting all have significance on the amplitude-preserved ability of seismic data and pre-stack AVO inversion.

关 键 词：球面扩散补偿 偏移距规则化 道集切除 保幅性 叠前反演 

分 类 号：P631.4[天文地球—地质矿产勘探]