摘要
波阻抗反演在储层横向预测和岩性识别中起着重要的作用,客观地评价所反演的波阻抗的可靠性,可以给出储层预测的置信度。针对波阻抗迭代线性化反演算法,利用奇异值分解计算反演灵敏度矩阵的特征值,定量地分析了不同地质结构下波阻抗反演结果的可靠性。不同地质结构的模型计算结果表明,提高子波的主频,减少子波长度,可以提高波阻抗反演的稳定性,减少波阻抗反演解的非唯一性,为实际地震资料的波阻抗反演结果的评价提供定量指标。
Acoustic impedance inversion plays an important role in the lateral reservoir prediction and lithologic i-
dentification.Reliable acoustic impedance gives confidence into reservoir prediction. With eigenvalues of the sen-
sitive matrix associated with iterative linearized inversion algorithm for acoustic impedance, we analyzed quantita-
tively the reliability of acoustic impedance inversion for various geologic structures. The analysis shows that in-
creasing the dominant frequency and shortening the wavelet length help improve the stability of inversion and de-
crease the nonuniqueness of inversion solution. The result can be used as a quantitative index in evaluation of im-
pedance inversion result.
出处
《勘探地球物理进展》
2004年第3期186-188,200,共4页
Progress in Exploration Geophysics
基金
中国石化"影响波阻抗反演的因素及适用条件的研究"项目资助
