The Influence of Automatic Gain on Amplitude during Seismic Data Processing

详细信息   

• 责任者：Zhang Xianxu (Xi’an Research Institute ; China Coal Technology and Engineering Group Corp ; Xi’an 710077 ; China) ; Qiang Juan
• 刊名：Coal Geology & Exploration
• 出版年：2012
• 卷期：40(2)
• 关键词：地震勘探 ; seismic exploration
• 页码：p.82-85
• 图表：1 illus., 1 table, 13 refs.
• 分类号：1600
• issnNo：ISSN1001-1986
• isbnNo：CN61-1155/P

摘要

Automatic gain control （AGC） is a modulus commonly used in seismic data processing. This 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 interpretation 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 misinterpretation. In the processing flowchart with amplitude interpretation as objective, it is forbidden to utilize AGC before and after stacking.