石油与天然气地质 ›› 2009, Vol. 30 ›› Issue (2): 236-239.doi: 10.11743/ogg20090216

• 技术方法应用 • 上一篇    下一篇

最优化广义S变换及其在油气检测中的应用

史燕红, 边立恩, 贺振华   

  1. 成都理工大学 "油气藏地质及开发工程"国家重点实验室,四川 成都 610059
  • 收稿日期:2009-01-10 出版日期:2009-04-25 发布日期:2012-01-16
  • 基金项目:

    国家高技术研究发展计划(863)项目(2006AA0AA102-12);国家自然科学基金项目(40774064)

Optimal generalized S-transform and its application to hydrocarbon detection

Shi Yanhong, Bian Li'en, He Zhenhua   

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2009-01-10 Online:2009-04-25 Published:2012-01-16

摘要:

通过测井数据标准化,岩心资料的选取与处理,计算出流体流动单元指标FZI。将研究区内的储层划分成3类流动单元,并建立了孔隙度、渗透率等测井解释模型。采用分流动单元进行储层渗透率解释方法,渗透率的解释精度明显得到了提高。通过建立反映测井信息与流动单元内在联系的样本集,实现了储层参数由取心井到非取心井的最佳定量求取,根据不同的流动单元,应用不同的解释模型,较精确地计算出渗透率值。从该技术在研究区内77口井的应用效果看,能够正确揭示储层参数的平面变化规律,指导剩余油研究及开发调整方案编制。

关键词: 时频分析, 非平稳信号, 最优化广义S变换, 分频剖面, 油气检测

Abstract:

Time-frequency analysis is one of the important means for direct hydrocarbon detection with seismic data.Real seismic signals are non-stationary and shortcomings and deficiencies exist in conventional time-frequency analysis methods such as short-time Fourier transform,Gabor transform and wavelet transform.To tackle these problems,a new time-frequency analysis method-optimal generalized S-transform-is achieved by adding a new parameter "p" in S-transform to adjust the standard deviation of window function and selecting the optimal value of p according to the measurement criteria of the time-frequency aggregation proposed by Jones and Parks.Trial calculation with synthetic signals shows that this method has a better time-frequency aggregation than conventional time-frequency analysis methods.Application of this method to actual seismic data shows that the frequency-division data volume generated by this method is effective in hydrocarbon detection and identification.

Key words: time-frequency analysis, non-stationary signal, optimal generalized S-transform, frequency-division profile, hydrocarbon detection

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