详细信息   

• 责任者：Li Yanling (Exploration and Development Research Institute of Daqing Oilfield Company Ltd. ; Daqing 163712 ; China) ; Wang Yunzhuan
• 刊名：Petroleum Geology & Oilfield Development in Daqing
• 出版年：2010
• 卷期：29(5)
• 关键词：AVO技术 ; AVO techniques ; 松辽平原 ; Songliao Plain
• 页码：p.168-171
• 图表：3 illus., 10 refs.
• 分类号：1600
• issnNo：ISSN1000-3754
• isbnNo：CN23-1286/TQ

摘要

The analysis of logging and seismic response characteristics of gas-bearing volcanic rock is conducted by using the data from volcanic rock of Xujiaweizi fault-depression in Songliao Basin, and the method of applying AVO technology to direct detection of volcanic-rock gas reservoir is searched. The seismic data with high fidelity that meets the requirement of AVO analysis is acquired through the high-accuracy processing of seismic data. The influence factor of volcanic-rock elastic modulus on geophysical parameters is found on the base of petrophysical analysis. Eight types of AVO model are built using Aki-Richards and Shuey approximate formulas. The comprehensive analysis of model and AVO attributes shows that the poisson and P/S wave velocity ratios are the sensitive attributes of identifying Xujiaweizi fault-depression gas reservoir. The product of vertical incidence reflection coefficient and variation rate of poisson ratio is the effective AVO attribute to identify the gas reservoir. Thus, AVO characteristic type of Xujiaweizi fault-depression gas reservoir is determined.