辽中北洼锦州A 区东营组浊积扇地震描述研究

针对渤海油田辽中北洼锦州A 区东二下段不同类型浊积扇内部反射结构及其地震响应特征认识难度大的问 题，开展了浊积扇地震描述研究。从浊积扇形成机理出发，根据围区钻遇浊积扇体不同部位探井的相应井段的岩性及 组合结构等典型特征，对不同浊积扇沉积亚相的沉积特征、岩性结构、测井和地震响应特征进行了系统的分析和描述。 在此基础上，建立不同类型浊积扇模型进行地震正演模拟，并对其地震响应特征进行了深入研究，最后利用地震多属 性预测技术对浊积扇的内幕进行了精细地刻画。预测了辽中北洼锦州A 区东营组浊积扇有利储层发育部位，研究结 果对该区浊积扇岩性油气藏勘探具有指导意义。

BLIND SEPARATION OF CONVOLVED MIXTURES BY USING ONEUNIT ALGORITHM IN THE FREQUENCY DOMAIN

The convolutive model in the time domain is transformed to an instantaneous model in the frequency domain by sliding window shorttime Fourier Transform,so more robust ICA algorithm of instantaneous model can be employed to solve convolved mixtures problem.In this paper,based on blind convolved mixtures algorithm in the frequency domain,a complex fixed point algorithm that is a oneunit algorithm of the fast convergence is applied to every frequency bin,it can separate source signals under separation filter higher order in the real environment.Then in order to prevent it from converging to the same signal,the deflation technique is used to extract the separated signals from convolved mixtures in the frequency domain.Scaling and permutation problems also are solved in the frequency domain,so multiplesources can be recovered one by one.Simulation demonstrates the validity.