《地震沉积学在浊积扇研究中的应用》由会员分享，可在线阅读，更多相关《地震沉积学在浊积扇研究中的应用（7页珍藏版）》请在金锄头文库上搜索。
1、 CPS/SEG Beijing 2009 International Geophysical Conference Li Bin, SouthWest University of Petroleum, Chengdu, Sichuan Province, China, 610500; Zhu Handong， BGP， CNPC，ZhuoZhou City，Hebei Province，072751 Summary Seismic sedimentology has good discipline advantage for study on complex lithology reserv
2、oir.The technology of ninety-degree phasing, the determination of isochronal sedimentary plane and the analysis of seismic attribute phase play important roles on study of sedimentary micro-facies and presently are recognized the core technology of seismic sedimentology study. Combinated micro-facie
3、s study, using phase-controlled reservoir prediction technique determines the form of lithologic trap,which can provide basic geological basis for final target of favorable well place. 1 Introduction Seismic sedimentology is the use of seismic data in the study of sedimentary rocks and the processes
4、 by which they were formed,it is another new edge-crossed discipline after the seismic stratigraphy, sequence stratigraphy. The content, method and technology of the new discipline are very different form Seismic stratigraphy, sequence stratigraphy, sedimentology and other disciplines,the greatest t
5、heoretical break- throughs of seismic sedimentology is a new awareness to seismic eventdiachronism. But it is the development of sedimentology, not a substitute. The study of seismic sedimentology is carried out basing on geological study, under the guidance of sedimentology rule. At present,the nin
6、ety-degree phasing, Wheeler Transform and quantitative analysis of seismic attribute phase and processing technology of improving resolution through well-controlled are four key technologies in the development of seismic sedimentology. The technology of ninety-degree phasing of seismic gives litholo
7、gical meaning to seismic phase and can be used in high frequency sequence interpretation； seismic data based on the different frequency reflect the different geological information,using the method of well-controlled mention frequent to explanation, which makes the geological significance of seismic
8、 interpretation results become more clearly; Wheeler Transform is a technology that can be used to study planar distribution of sedimentary system and depositional facies by using a series of stratal slice, to make the stratal slice，a series of surfaces are firstly interpolated between two isochrona
9、l surfaces and then slices are made along each of them.Under sequence stratigraphic framework of a log and seismic data combined, after using Wheeler Transform,quantitative analysis of extracted seismic attributes is an important means of sedimentary system study. Following, we cite Liangjia Lou Reg
10、ions in the Western Dongying Depression as an example ， discuss the role of seismic sedimentology technology in the form of turbidite fan describes. 2 The technology of ninety-degree phasing In order to overcome the shortcoming of zero-phase wave, the technology of ninety-degree phasing will rotate
11、ninety- degree for seismic phase,makes main lobe of reflection wave transforming thin-layer center. Main Menu ID: 1227 CPS/SEG Beijing 2009 International Geophysical Conference middlewave clustering; rightfrequency attribute Fig.2 the ninety-degree phasing profile 时频三原色时频三原色 波形聚类波形聚类均方根振幅均方根振幅 Refer
12、ence Reference CPS/SEG Beijing 2009 International Geophysical Conference & Exposition Fig.4 sand discribing of facies-controlled 有色反演有色反演 frequency frequency CPS/SEG Beijing 2009 International Geophysical Conference & Exposition 地震沉积学在浊积扇研究中的应用 地震沉积学在浊积扇研究中的应用 刘力辉* ， 李 斌 朱汉东 (北京诺克斯达石油科技有限公司，北京 10008
13、3； 长江大学，湖北荆州 434023；西南石油 大学资源与环境学院，四川成都 610500； 中国石油集团东方地球物理公司，河北涿州 072751) 摘要 本文以东营凹陷西部梁家楼地区为例，以地震沉积学的理论和技术刻画了浊积扇沉积砂体的形态，研究结果表明:经过 90相位调整后的地震相位具有地层意义，有利于开展高频层序的地震分析；在井震结合的层序地层格架下用 Wheeler 域切片技术为研究沉积体系和沉积相平面展布提供了等时研究的变时窗；在 Wheeler 变时窗下提取的地震属性定量分析是研究沉积体的重要手段，也是目前公认的地震沉积学研究的核心技术；相控属性投影是雕刻砂体三维形态的最直接、最有
14、效技术，结合微相研究，采用相控储层预测技术确定岩性圈闭的形态，可为最终有利井位的确定提供基础地质依据。 引言 引言 地震沉积学是应用地震信息研究沉积岩及其形成过程的学科，它是继地震地层学、层序地层学之后的又一门新的边缘交叉学科。 其研究内容、方法和技术与地震地层学、层序地层学和沉积学等其他学科都有所不同， 地震沉积学最大的理论突破在于对地震同相轴“穿时性”的重新认识。但它是沉积学的发展而不是替代，地震沉积学研究要以地质研究为基础， 在沉积学规律的指导下进行。 其中 90相位转换、 Wheeler 变换和地震属性相定量分析及相控属性投影技术是目前地震沉积学发展中的关键技术。 90相位转换使地震相
15、位具有了地层意义， 可以用于高频层序地层的地震解释； 基于不同频率地震资料反映地质信息的不同，采用井控提频解释的方法，使得地震解释结果的地质意义更加明确；Wheeler 变换是沿两个等时界面间等比例内插出的一系列层面进行切片来研究沉积体系和沉积相平面展布的技术；在井震结合的层序地层格架下用 Wheeler变换后提取的地震属性定量分析是沉积体系研究的重要手段。 下面我们以东营凹陷西部梁家楼地区为例，探讨地震沉积学方法在浊积扇体形态刻画中的应用。 90相位转换技术 相位转换技术 90相位转换技术是将地震相位旋转 90， 使反射波主瓣提到薄层中心， 以此来克服零相位波的缺点。90相位转换技术的核心思
16、想是：在零相位地震数据中，地层界面对应于波峰或波谷，地层的岩性与地震相位间不存在确定性的对应关系，90相位转换可使地层界面对应于零相位，这样地震道就能更好地模拟井波阻抗，地震相位也就具有了地层意义。 此时地震相位在一个波长的厚度范围内与岩性相对应。 90相位转换技术为地质学家研究地层岩性和岩相提供了一个直观简便的方式， 是地震沉积学说中岩性剖面解释的重要技术手段。总之，90相位转换使地震相位具有了地层意义（图 1） 。 3 Wheeler 等时沉积界面的确定等时沉积界面的确定 地层切片是地震属性(如振幅)在地质(沉积)时间面上的显示。 地层切片是用地质时间相同的地震同相轴之间的线性内插函数重新提取地震道，从而进行地震资料处理解释。
