摘要
为了解决常规谱比法不稳定及等效Q值储层识别精度低的问题,在基于Lucy-Richardson算法的广义S变换(LR-GST)的基础上,改进了谱比法计算Q值的公式,同时构建反演目标函数将等效Q值转换为层间Q值。结果表明:Q值求取精度与噪声比率、求取方法等因素有关,含噪比率不同每种方法的准确性也差异较大。通过合成数据及实际应用表明,本文方法的分辨率及聚集性更高,方法的稳定性更好,得到的Q值在含油气区域异常明显。
In order to solve the problem of instability of conventional spectral ratio method and low accuracy of average-Q reservoir identification,this paper improves the formula for calculating Q value by spectral ratio method on the basis of the generalized S transform based on Lucy Richardson algorithm(LR-GST),and constructs an inversion objective function to convert the average-Q into internal-Q value.The results show that the accuracy of Q value is related to the ratio of noise and the method,and the accuracy of each method is different with different ratio of noise.The synthetic data and practical application show that the proposed method has higher resolution,better aggregation,and better stability,and the Q value obtained is unusually obvious in the oil-bearing region.
作者
宋志华
安智谛
王玉伟
凌勋
文晓涛
SONG Zhihua;AN Zhidi;WANG Yuwei;LING Xun;WEN Xiaotao(Exploration Utility Department of Xinjiang Oilfield Company CNPC,Karamay 834000,China;College of Geophysics,Chengdu University of Technology,Chengdu 610059,China)
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第4期479-485,共7页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
中国石油天然气股份有限公司科技项目(20200101040000,2020PT-Y-B-0009)。
