天然气地球科学

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分频波阻抗反演技术在塔中西部台内滩储层预测中的应用

王振卿1,王宏斌1,张虎权1,张继娟1,武雪琼2   

  1. 1.中国石油勘探开发研究院西北分院,甘肃 兰州 730020|2.中国石油大学(北京), 北京 102249
  • 收稿日期:2014-02-08 修回日期:2014-05-19 出版日期:2014-11-10 发布日期:2014-11-10
  • 作者简介:王振卿(1979-),男,山西襄垣人,工程师,硕士,主要从事碳酸盐岩储层预测研究. E-mail:wangzhenq@petrochina.com.cn.
  • 基金资助:
    中国石油勘探与生产公司科技项目“海相碳酸盐岩沉积环境,岩相古地理研究与有利区带优选”(编号:2009D-1905-03)资助.

Frequency Division Inversion for the Intraplatform Shoal Reservoir

WANG Zhen-qing1,WANG Hong-bin1,ZHANG Hu-quan1,ZHANG Ji-juan1,WU Xue-qiong2   

  1. (1.Northwest Branch,Research Institute of Petroleum Exploration and Development,PetroChina,Lanzhou 730020,China; 2.China University of Petroleum,Beijing 102249,China)
  • Received:2014-02-08 Revised:2014-05-19 Online:2014-11-10 Published:2014-11-10

摘要: 塔中I号坡折带西段台内滩储层主要发育在上奥陶统良里塔格组,其地震响应以弱振幅响应为主,与东段台缘礁特有的“丘状”外部轮廓和内部发育“串珠状强反射”的地震响应特征有明显差异。台内滩弱振幅储层的优势频段为15~25Hz。优选广义S变换分频方法进行频谱分解,用20Hz分频均方根振幅实现了台内滩储层的预测,通过带通滤波处理得到的优势频段内的纯波数据进行波阻抗反演,能有效地识别出塔中西部上奥陶统良里塔格组的台内滩储层,提高了台内滩储层的识别精度,取得了较好的应用效果。

关键词: 碳酸盐岩, 塔中北部斜坡区, 台内滩, 广义S变换, 分频反演

Abstract: As an important substitute area,the seismic character of the intraplatform shoal reservoirs in the western area of Tazhong is weak,which is different from the strong beaded-like and moundy-shape reflection of the reef shoal reservoirs. Its responding frequency is 15-25Hz.According to the distribution character of real seismic data,the generalized S-transform is able to adjust the variation trend of Gaussian window function with the frequency scale to the velocity control of time window width by frequency variation.Spectral decomposition with generalized S-transform is made to qualitatively predict the reservoir distribution.Then an inversion is made to the intraplatform shoal reservoirs by using pure wave data filtered by 15-25Hz,which improves the recognization accuracy of the mud mound beach in mesa,and achieves a good application effect.

Key words: Carbonate, Northern slope zone of Tazhong area, Intraplatform shoal reservoirs, Generalized S-transform, Frequency division inversion

中图分类号: 

  • TE132
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