一种基于叠前数据的综合Q值求取及应用

发布时间：2018-05-25 21:41

本文选题：时—频域 + 谱比法　；参考：《石油地球物理勘探》2017年02期

【摘要】：传统的基于叠后地震资料的地层Q值估算法因受叠加平均效应的影响,Q值估算精度较低、适用性差。叠前地震资料本身包含的地层信息丰富,受环境噪声的影响较小。基于叠前地震资料利用S变换可得到Q值,但其准确性还有待进一步改进。本文提出一种基于叠前地震资料,利用广义S变换求取时频域表层Q值的方法,具体做法为:借助于广义S变换对叠前地震数据做时—频分析,逐道求取频谱比斜率,经炮检距归零处理得到零炮检距处的表层Q值,通过表层Q值与井控深层Q值建立综合Q体。将这套方法应用于西柳地区的实际资料处理,实现了综合Q值补偿,取得了令人满意的效果。
[Abstract]:The traditional Q value estimation method based on post stack seismic data is affected by the superimposed average effect, the estimation accuracy of the Q value is low and the applicability is poor. The information of the pre stack seismic data itself contains rich formation information and is less affected by the environmental noise. Based on the pre stack seismic data, the Q value can be obtained by using S transform, but the accuracy still needs to be further improved. A method based on pre stack seismic data and using generalized S transform to obtain the surface Q value of time and frequency domain is proposed in this paper. The specific practice is to obtain the spectral ratio slope by means of the time frequency analysis of pre stack seismic data by means of generalized S transform, and get the surface Q value of the zero offset by the zeroing of the cannon distance, and through the surface Q value and the well controlled deep Q value through the well control. The comprehensive Q body is established. The method is applied to the actual data processing in the West willow area, and the comprehensive Q value compensation is realized, and satisfactory results are achieved.
【作者单位】：中国石油华北油田物探研究院;中国石油东方地球物理公司华北物探处;中国石油华北油田采油五厂;中国石油东方地球物理公司研究院华北分院;
【基金】：中国石油天然气股份有限公司重大科技专项“华北油田上产稳产800万吨关键技术研究与应用”(2014E-03504)资助
【分类号】：P631.44

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