Pinch-Out Boundary Recognition Technology of Delta Sand Body Based on Seismic Instantaneous Spectral Analysis
详细信息
- 责任者：Wang Jun (Research Institute of Bohai Oilfield Exploration and Development ; Tianjin Branch of CNOOC ; Tianjin 300452 ; China) ; Zhang Zhongqiao
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2011
- 卷期：18(5)
- 关键词：地震勘探 ; seismic exploration ; 频谱分析 ; spectral analysis
- 页码：p.585-588
- 图表：2 illus., 10 refs.
- 分类号：1600
- 出版序号：975
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
The identification and characterization of lithologic pinch-out boundary is always a problem in the description of subtle traps.Based on the theory of thin layer tuning and S transform time -frequency analysis method,this paper analyzed the instantaneous spectral tuning characteristics of thin layer and the feasibility of using thin-layer tuning principle to identify lithologic pinch-out boundary.The study found that the pinch-out boundary in delta sand body with different thickness could be characterized through different frequency components of the instantaneous spectrum.Because different locations of the delta sand body,the thickness of pinch-out boundary was inconsistent.So the kernel principal component analysis method was introduced into the technology of instantaneous spectral component analysis.Using the kernel principal component analysis and through the first principal component that has high value contribution,all of the effective information of pinch-out boundary which were distributed to different components of the instantaneous spectrum could be represented.This technology was applied to the lithologic pinch-out boundary identification of delta sand body in JX1-2N work area with a good result.