石油与天然气地质 ›› 2012, Vol. 33 ›› Issue (1): 135-140.doi: 10.11743/ogg20120117

• 技术方法 • 上一篇    下一篇

地震波形分类技术应用条件及其在葡北地区沉积微相研究中的应用

江青春1, 王海2, 李丹3, 曹锋1, 李秋芬1, 孙作兴1, 周慧1   

  1. 1. 中国石油 勘探开发研究院, 北京 100083;
    2. 中国石油 塔里木油田分公司 勘探开发项目经理部, 新疆 库尔勒 841000;
    3. 中国石化 河南油田分公司 勘察设计研究院, 河南 南阳 473132
  • 收稿日期:2011-08-03 修回日期:2012-01-06 出版日期:2012-02-28 发布日期:2012-03-22
  • 基金项目:

    国家科技重大专项(2011ZX05001-002 )。

Application conditions of seismic waveform classification technique and its use in the study of sedimentary microfacies of Pubei area

Jiang Qingchun1, Wang Hai2, Li Dan3, Cao Feng1, Li Qiufen1, Sun Zuoxing1, Zhou Hui1   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 102249, China;
    2. Exploration & Development Project Manager Department, PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000, China;
    3. Survey and Design Research Institute, SINOPEC Henan Oilfield Company, Nanyang, Henan 473132, China
  • Received:2011-08-03 Revised:2012-01-06 Online:2012-02-28 Published:2012-03-22

PDF (PC)

1225

被引次数

32

摘要：

在应用地震相分析软件Stratimagic对葡北地区七克台(Qkt)组进行地震相分析的过程中,对地震波形分类技术的应用条件进行了对比。分析发现,频率大于40 Hz、信噪比大于25 DB的地震资料可以较好地满足地震波形分类的研究。构造形态平缓、断裂不发育的地区运用波形分析效果较好。此外合适的地震时窗大小的选取和适当的波形分类数的设定也影响波形分类分析的运用效果。一般5~8种分类数是比较合适的,与沉积微相类型的匹配效果较好。在此基础上,运用该技术编制了葡北地区七克台组的沉积微相,对比单井沉积微相分析结果发现,有86%以上的单井相分析结果与预测的沉积微相图吻合,证实了地震波形分类技术预测沉积微相的可靠性。最后,运用该技术预测了该地区的砂体展布,为该地区下步隐蔽油气藏的勘探指明了方向。

关键词: 地震相, 单井相, 沉积微相, 波形分类技术, 砂体, 预测, 葡北地区

Abstract:

During analyzing the seismic facies of Qiketai(Qkt) Formation in Pubei(Pb) area with Stratimagic software,we compared the application conditions of waveform classification technique.Seismic data with a frequence greater than 40 Hz and a signal-to-noise ratio greater than 25 DB are suitable for seismic waveform classification.The effect of waveform analysis is good in area with gentle structural attitude and under-developed fractures.Furthermore,the selection of suitable seismic time window and the setting of proper waveform classification number also affect the application effect of waveform classification technique.Generally,a waveform classification number of five to eight is reasonable,which match well with the sedimentary microfacies types.This technique is used to map the sedimentary microfacies of Qkt Group.Comparison with single well sedimentary microfacies identification shows that the coincidence rate is more than 86%,verifying the reliability of sedimentary microfacies prediction by using seismic waveform classification technique.Finally,this paper presents the sandstone distribution predicted by using this technique which can be used to guide future exploration of subtle reservoirs in the area.

Key words: seismic facies, single well facies, sedimentary microfacies, waveform classification technique, sand body prediction, Pb area

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