基于非线性能量分析的鲕滩储层预测方法

Teager Kaiser非线性能量（T K能量）可以归为振幅类地震属性，但有别于常规的振幅类地震属性，它与振幅的平方、频率的平方成正比。鲕滩储层中流体为油气时地震记录往往呈现“高频衰减” 现象，由于T K能量与频率平方成正比，因此含油气鲕滩储层内部T K能量弱。鲕滩储层与围岩的物性差别使储层顶和底边界形成“亮点”反射，相应的T K能量高，T K属性剖面背景越发“明亮”，而内部相对较“暗”，利用这些特征可以有效地进行鲕滩储层预测，实际资料的计算结果表明，基于非线性能量分析的鲕滩储层预测方法得到的鲕滩储层分布与实钻完全一致。

OOLITIC RESERVOIR PREDICTION METHOD BASED ON NONLINEAR ENERGY ANALYSIS

Non linear Teager Kaiser energy (TK energy) can be classified as the amplitude of the seismic attributes,but it is different from the conventional seismic attributes,because it is proportional to the square of amplitude and frequency.When the oolitic reservoir is full of oil or gas,seismic records often present “high"frequency attenuation” phenomenon.As TK energy is proportional to the square of frequency,TK energy of the reservoir which contains oil or gas is weak.Since the oolitic reservoir′s top and bottom is different from the surrounding in rock properties,“bright spot” reflection often presents on top and bottom of the reservoir,so TK energy of the top and bottom of the reservoir is stronger.With seismic profile after extraction of seismic attribute of TK energy,the top and bottom of the reservoir on the seismic profile is much “brighter”,while TK energy is relatively weak in the internal reservoir.These characteristics can be used to predict the oolitic reservoir.The computational result of the real data shows that the predicted distribution of oolitic reservoir based on TK energy method is completely consistent with the real work data.