石油与天然气地质 ›› 2008, Vol. 29 ›› Issue (1): 141-145.doi: 10.11743/ogg20080122

• 方法、技术与应用 • 上一篇    下一篇

频谱成像技术在采穴构造储层预测中的应用

盛秋红1,2, 肖兰雄3   

  1. 1. 中国地质大学, 湖北, 武汉, 430074;
    2. 中国石油化工股份有限公司勘探南方分公司石油勘探开发研究院, 四川, 成都, 610041;
    3. 中国石油化工股份有限公司勘探南方分公司, 四川, 成都, 610041
  • 收稿日期:2006-07-25 出版日期:2008-02-24 发布日期:2012-01-16

Application of spectrum imaging technique to the reservoir prediction of the Caixue Structure

Sheng Qiuhong1,2, Xiao Lanxiong3   

  1. 1. China University of Geosciences, Wuhan, Hubei 430074, China;
    2. Research Institute of Petroleum Exploration and Development, Southern Exploration Company, SINOPEC, Chengdu, Sichuan 610041, China;
    3. Southern Exploration Company, SINOPEC, Chengdu, Sichuan 610041
  • Received:2006-07-25 Online:2008-02-24 Published:2012-01-16

摘要:

依据薄层反射的调谐原理,每个薄层产生的地震反射在频率域都有一个与之对应特定的频率成分,该频率成分可以指示薄层的时间厚度.频谱成像技术用小波变换的时频分析技术,将地震数据变换到频率域,振幅谱描绘时间地层厚度变化,而相位谱则显示了地质体的横向不连续性.在预测的储层体内,提取度量高频端能量衰减的衰减梯度属性,预测储层的含油性.江汉盆地西南缘采穴构造主力含油层系为古生界白垩系渔洋组的网状河道砂体,其最佳频谱响应位于25~45Hz之间,应用频谱成像技术预测主要含油有利区位于采穴构造东部,呈北北东向展布,钻探揭示,该区具有工业油流,表明频谱成像预测结果与钻探成果相吻合.

关键词: 小波变换, 衰减梯度, 频谱成像, 储层预测, 江汉盆地

Abstract:

According to the tuning principle of reflection of thin layer,seismic reflection coming from each thin layer has a corresponding special frequency component in frequency domain,which reveals the thickness of the thin layer.The frequency spectrum imaging technique transforms seismic data into frequency domain by using the time-frequency analysis method of wavelet transform.Amplitude spectrum describes the changes of layer thickness,while phase spectrum shows the lateral continuity of geological body.In reservoirs prediction,attenuation gradient of high frequency energy can be extracted and measured to predict oil-bearing properties of reservoirs.The braided channel sandbodies in the Cretaceous Yuyang Formation are the main oil-bearing stratum in Caixue structure at the south-western edge of Jianghan basin and their optimum response of frequency spectrum is between 25 Hz and 45 Hz.The prediction with spectrum imaging technology shows that favorable oil-bearing zone is located at the east of Caixue structure and is distributed in a NNE direction.Drilling has discovered industrial oil flow,showing a high consistency with the prediction results.

Key words: wavelet transform, attenuation gradient, spectrum imaging technology, reservoir prediction, Jianghan Basin

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