Study on Extraction Method for Q Based on Pre-Stack Gather in Wavelet Domain
详细信息
- 责任者：Wang Xiaojie (Geophysical Research Institute ; Shengli Oilfield Company ; SINOPEC ; Dongying 257022 ; China) ; Li Hongmei
- 刊名：Geophysical Prospecting for Petroleum
- 出版年：2011
- 卷期：50(4)
- 关键词：Q值 ; Q value ; 小波变换 ; wavelet transform
- 页码：p.355-360
- 图表：10 illus., 16 refs.
- 分类号：1600
- issnNo：ISSN1000-1441
- isbnNo：CN32-1284/TE
摘要
The Q value of formation is an important parameter of oil and gas detection. According to the ambiguity for Q computation by post-stack seismic data, the authors discussed the Q versus offset (QVO) method which extracts Q value through pre-stack gathers. By model testing, the authors discovered that the extracted curve of slope and offset square is approximate linear, which is coinciding with the theory and proves the correction of the theory. In addition, the QVO method was used to extract Q of actual formation, and the result shows that the difference of Q between gas-bearing area and non-gas area is obvious. In gas-bearing area, the Q is relatively low, which displays strong absorption.