Application of high-order statistics coherence method in prediction of reef reservoir in Jiannan Structure
Yang Zhen-wu1,2, Zhu Pei-min3, Zeng Fan-ping4
1 China University of Petroleum, Beijing City, 102249, china;
2. Exploration&Development Institute, Jianghan Oilfield Co. Ltd. of Sinopec, Qiangjiang City, Hubei province, 433124, china;
3. China University of Geosciences (Wuhan), Wu han City, Hubei Province, 430074, China;
4. Dagang Branch, Ueophvsical Research Institute, BGP Inc. of CNPC, Dagang District, Tianjin City, 300280, China
Abstract：As the high-order statistics have the ability to detect and characterize the nonlinearity and other parameters,a new method in which the high-order statistics were used to identify and predict the reef reservoir was proposed in this paper. The propose of the research is to utilize the high-order statistics to detect the non-Gaussian property of the reef so as to predict the existence of the reef reservoir. Regarding the sensitiveness of the high-order moment to non-Gaussian signal,especially the characteristic in which the greater extent the signal deviate from the Gaussianity,the greater the high-order moment is,the second-order related coherence cube algorithm was analogized to third-order and fourth order,so the high-order coherence slices which reflect the Gussian deviation extent was extracted. The research results show that 90 percent seismic traces are subject to generalized Gaussian distribution. The high-order coherence cube could accurately predict the distribution of the reef.
