地震资料处理中自动增益控制方法对振幅的影响  

The influence of automatic gain on amplitude during seismic data processing

作　　者：张宪旭 强娟 杨光明 聂爱兰 孙永亮 

机构地区：[1]中煤科工集团西安研究院,陕西西安710077 [2]延长石油集团研究院,陕西西安710069

出　　处：《煤田地质与勘探》2012年第2期82-85,共4页Coal Geology & Exploration

摘　　要：自动增益控制方法(AGC)是地震资料处理中常用的一个模块。通过构建模型和两套处理流程,对炮集、CDP道集和叠后数据使用该模块后可能给振幅带来的影响进行了分析,进而讨论了该模块对AVO属性分析、岩性和流体识别等振幅解释技术产生的影响。研究认为,AGC方法对岩性异常处的振幅变化会带来严重失真,最终将导致解释错误。因此,在以振幅解释为目的的处理流程中,叠前和叠后禁止使用AGC方法。Automatic gain control （AGC） is a modulus commonly used in seismic data processing. The paper, through building model and two processing flowcharts, analyzed shot gather, CDP gather and the influence of the use of the modulus after data stacking on amplitude, then discussed the influence of the modulus on amplitude in- terpretation technology such as AVO attribute analysis, identification of lithology and fluid. In the study, it was considered that AGC would bring sever falsification of the amplitude at lithologic anormaly, inducing misinterpre- tation. In the processing flowchart with amplitude interpretation as objective, it is forbidden to utilize AGC before and after stacking.

关 键 词：地震资料处理 AGC 振幅保真 数字模型 

分 类 号：P631[天文地球—地质矿产勘探]