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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

Frequency Division Inversion for the Intraplatform Shoal Reservoir

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【作者】 王振卿王宏斌张虎权张继娟武雪琼

【Author】 WANG Zhen-qing;WANG Hong-bin;ZHANG Hu-quan;ZHANG Ji-juan;WU Xue-qiong;Northwest Branch,Research Institute of Petroleum Exploration and Development,PetroChina;China University of Petroleum;

【机构】 中国石油勘探开发研究院西北分院中国石油大学(北京)

【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。

【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 15-25 Hz.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 15-25 Hz,which improves the recognization accuracy of the mud mound beach in mesa,and achieves a good application effect.

【基金】 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
  • 【文献出处】 天然气地球科学 ,Natural Gas Geoscience , 编辑部邮箱 ,2014年11期
  • 【分类号】P631.4;P618.13
  • 【被引频次】6
  • 【下载频次】215
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