基于时频分析与Wheeler变换的高精度储层预测  

High-precision reservoir prediction based on time-frequency analysis and Wheeler transform

作　　者：魏晓华[1,2] 刘怀山[1] 徐秀刚[1] 马海[1,2] 王树华 

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,青岛266100 [2]中国建筑材料工业地质勘查中心江苏总队,南京211135 [3]中石化胜利油田分公司西部新区研究中心,东营257022

出　　处：《地球物理学进展》2013年第6期3153-3164,共12页Progress in Geophysics

基　　金：国家自然科学基金(41176077;41230318);国家863项目(2013AA092501);国家973项目(2009CB219505)联合资助

摘　　要：砂泥岩薄互层地震识别,尤其是米级薄层油砂体识别一直是地球物理界所困惑的问题.时频分析方法能够在常规数据域精确识别储层的厚度;Wheeler变换具有较强的等时意义,并且能够去除区域构造背景影响,有效识别无沉积或侵蚀事件,把控储层横向展布.综合应用两种方法,既能利用Wheeler域横向分辨率的优势,又能利用常规数据域纵向分辨率的优势,从而能够极大减少储层解释的多解性,提高预测精度.Seismic data carry a lot of reservoir geological information, and seismic reservoir prediction has become an important means of detecting oil and gas reservoir. It always is a puzzle to identify thin sand-shale interbeds, especially thin oil sand ones in meters in the geophysics field due to both low horizontal resolution and low vertical resolution. What＇s more, with the development of technology of seismic data acquisition, processing and interpretation, it has been realized that single information to predict the reservoir characteristics can not overcome the ambiguity of seismic information. And the most effective way to overcome the multiple solutions is multi information comprehensive application. As an important reservoir description technique at the oil field development stage, time-frequency methods can obtain the instantaneous attributes which can guide reservoirs prediction, and are able to distinguish the thickness of reservoir in Conventional system domain, and its application combined with stratigraphic continuity is able to guide thin interbed and weak reflection reservoir seismic identification, and predict the oil and gas reservoirs. The method can improve the vertical resolution. In addition, Wheeler transform describes geological time stratigraphic diagram, which draws vertical geologic time domain but not the depth domain formation. and has strong time-parallel signifitance, and wipe off regional tectonic background influence so that it can effectively tell deposit-free or erosion events and identify horizontal distribution, visually depictand the stratums＇ geological time-spatial distribution characteristics and the sedimentary, no deposition or erosion events, analyze the progress of evolution and development about sediment. The method can improve the horizontal resolution. So integrated application of the two methods can take the advantages of horizontal resolution in the Wheeler domain and can take the advantages of vertical resolution in the conventional system domain, which can greatl

关 键 词：薄互层 时频分析 Wheeler变换 储层预测 

分 类 号：P631[天文地球—地质矿产勘探]