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油气的存在并不是对所有频率成分的地震信号都产生影响,它只使部分频率能量发生变化,当储层含油气时,将会引起高频能量的衰减和低频能量的增强.通过频谱分析,确定储层由于含油气引起能量变化的主要高频和低频,利用分频属性确定油气范围.时频三原色显示技术的优势在于其同时利用了高、中、低频率融合在一起显示,更直观方便的突出了地震体的优势频率,为含油气性预测提供参考.Marr小波具有计算简单、速度快,又具有良好的局部性能,可以用Marr小波模拟雷克子波对地震记录进行分频,利用三原色显示技术达到快速成像的目的.实际应用表明该方法对低频伴影能做到快速准确识别的效果,该项技术的发展将为深水少井和无井区隐蔽油气藏的研究提供有力的技术支持.
The existence of oil and gas does not affect the seismic signals of all frequency components, it only makes part of the frequency energy change, when the reservoir contains oil and gas, it will cause the attenuation of high-frequency energy and the enhancement of low-frequency energy.By spectrum analysis, Determine the main high-frequency and low-frequency of the reservoir due to oil-gas-induced energy changes, and use the frequency-dividing property to determine the oil-gas range.The advantages of time-frequency three primary-color display technology lie in that the high, medium and low frequencies are combined and displayed at the same time, which is more intuitive and convenient Which can provide references for the prediction of oil and gas.Marr wavelet has the advantages of simple calculation, high speed and good local performance.It can use Marr wavelet to simulate the seismic record by using Ricker wavelet and use the three primary colors And the display technology achieves the purpose of fast imaging.The practical application shows that the method can quickly and accurately identify the low-frequency companion effect and the development of the technology will provide strong technical support for the study of subtle reservoirs in the shallow and shallow wells and no-well areas .