摘要
以地震资料为主体的储层含油气性检测技术在油气田勘探开发过程中发挥着重要的作用.基于含油气储层可以造成地震波高频能量衰减剧烈而低频能量衰减较弱的特性,结合小波变换与T-K算子对地震波不同频率能量进行非线性跟踪,通过定量表征地震记录高频非线性能量的衰减梯度,为储层含油气检测提供有效信息.基于TK算子的非线性能量是不同频率与振幅信息的综合表征物理量,较常规的基于频谱能量衰减分析技术,非线性能量衰减对含油气储层具有更加敏感的识别能力,并结合粘弹性介质数值模拟记录对其进行了验证.实际资料的应用效果进一步表明基于T-K算子的非线性能量衰减分析技术对油气富集区具有较为有效的检测能力.
The hydrocarbon detection technology based on the seismic information plays an important role in the oil and gas exploration and development. Based on the characteristic that high frequency energy of seismic wave can be more attenuated than the low frequency energy, we make the nonlinear tracking of the different frequency energy component of the seismic wave using the wavelet transform and nonlinear T-K operator. The attenuation gradient of the high frequency nonlinear energy can be estimated quantitatively as a useful attribute for the hydrocarbon detection. The nonlinear energy based on the T-K operator is a combined parameter of frequency and amplitude, which is more sensitive to the hydrocarbon-bearing reservoir than the normal attenuation analysis based on the spectral energy. The model test using the numerical simulation of viscoelastic medium verifies the sensitivity. The real application shows that the T-K operator-based nonlinear energy attenuation analysis can detect the hydrocarbon- bearing reservoir effectively.
出处
《地球物理学进展》
CSCD
北大核心
2011年第6期2107-2113,共7页
Progress in Geophysics
基金
国家重点基础研究发展计划(973)(2007CB209605)
国家重大专项(2008ZX05030-04-001-001)
中国石油大学优秀博士学位论文培育资助项目(Z10-01)联合资助
关键词
T-K算子
能量衰减
时频分析
含油气检测
T-K operator, energy attenuation, time-frequency analysis, hydrocarbon detection
