薄互层油气藏地震多波波场特征分析研究

项目名称： 薄互层油气藏地震多波波场特征分析研究

项目编号： No.41204091

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 地球物理学和空间物理学

项目作者： 周怀来

作者单位： 成都理工大学

项目金额： 26万元

中文摘要： 针对薄互层油气藏地震多波波场特征信息的识别问题，如多波波场与地层的对应关系、薄互层的横向追踪和纵向识别、薄互层内部多波波场相应特征提取和地震多波AVO变化规律，本项目研究拟采用多学科（地球物理、信号与信息处理、数字图像处理技术和计算机技术）交叉融合，实际资料与地质模型相结合，以非均匀介质粘滞各向异性弹性波方程为模型研究基础，建立薄互层地震多波波场特征信息识别方法，搞清楚薄互层油气藏储层的岩性、厚度、频率和衰减因素等与多波波场特征之间的关系，为该类油气藏的波场识别提供参考依据，从而达到提高储层油气预测精度的目的。本项目创新工作有：基于非均匀介质粘滞各向异性弹性波方程的最优化可变网格多尺度有限差分模拟方法、基于地震谱分解技术的多波AVO特征分析方法、地震资料时频域高分辨处理方法和第二代Curvelet变换分析方法。

中文关键词： 薄互层；多波波场；正演模拟；属性分析；时频分析

英文摘要： To deal with the recognition of the characteristics of seismic multiwave information in thin-interbeds oil and gas reservoir: such as the corresponding relations of the the multiwave field and the layer, thin-interbeds cross track and vertical identification, the response feature extraction of thin-interbeds internal multiwave field and seismic multiwave AVO variation. This project study multiple disciplines (geophysics, signal and information processing, digital image processing technology and computer technology) and cross-fusion them, with a combination of actual data with the geological model, and based on inhomogeneous media viscoelastic-anistropic wave equation model, establish the thin-interbeds seismic multiwave field characteristics recognition method to figure out of the relationship between lithology, thickness, frequency and attenuation factors and multiwave field characteristics in thin-interbeds oil and gas reservoir, provide a reference for the wave field recognition of such oil and gas reservoirs, so as to achieve the purpose of improve reservoir hydrocarbon prediction accuracy. The innovation of this project are: optimization of variable grid finite difference simulation of multi-scale method on the viscoelastic-anistropic wave equation in inhomogeneous media, improvement threshold value functio

英文关键词： thin interbed；multi-wave field；forward modeling；attribute analysis； time-frequency analysis