融合地震结构信息与属性信息表征陆相湖盆沉积体系

发布时间：2018-03-25 01:26

本文选题：结构信息　切入点：地震属性　出处：《石油地球物理勘探》2017年01期

【摘要】：以测井标定为基础的地震相划分方法采用小时窗的地震单一属性、多属性、属性融合及波形分类等划分沉积微相,缺乏对沉积微相宏观约束的背景分析,容易引起微相划分的"窜相",最终得到的属性平面分布往往突显了某类沉积体而弱化了其他沉积体,从而影响沉积体系研究结果的整体性。为此,在前人工作的基础上,提出了融合地震结构信息与属性信息表征陆相湖盆沉积体系的方法,其中层位—储层两步标定、时窗尺寸选择、两段色标显示及依据隶属关系进行旋回匹配融合等4个方面是该方法的关键点,满足了面状沉积体对地震结构信息完整性描述和线性沉积体对属性横向变化细节刻画的不同要求。实例分析结果表明,利用结构信息与属性信息融合技术得到的融合属性平面图既描述了三角洲内前缘、外前缘、浅湖相等面状沉积体的结构特征,又突显了对常规地震属性敏感的河道、河口坝等线性沉积体,相序更加完整,不同级别相序发育层次合理,有效避免了"窜相",完整刻画了目的层系沉积体系的发育特征。
[Abstract]:The seismic facies division method based on logging calibration uses the seismic single attribute, multi-attribute, attribute fusion and waveform classification of hourly window to divide sedimentary microfacies, which lacks the background analysis of macro constraints on sedimentary microfacies. It is easy to cause microfacies division of "channeling facies", and the resulting attribute plane distribution often highlights a certain type of sedimentary body and weakens other sedimentary bodies, thus affecting the integrity of the research results of sedimentary system. Therefore, on the basis of previous work, A method of combining seismic structure information with attribute information to characterize the continental lacustrine basin sedimentary system is presented, in which the horizon and reservoir are calibrated in two steps, and the time window size is chosen. The key points of the method are the display of two sections of color code and the cycle matching fusion based on membership relationship. It meets the different requirements of the integrality description of seismic structure information of the plane sedimentary body and the detail description of the lateral variation of the attribute of the linear sedimentary body. The example analysis results show that, By using the fusion technique of structural information and attribute information, the fusion attribute plane map not only describes the structural characteristics of the delta front, outer front and shallow lake, but also highlights the channel which is sensitive to conventional seismic attributes. For the linear sedimentary bodies such as estuarine dam, the facies sequence is more complete, and the level of facies sequence development is reasonable at different levels, thus effectively avoiding the "channeling facies" and characterizing the development characteristics of the sedimentary system of the target series.
【作者单位】：中国石油勘探开发研究院西北分院;中国石油集团油藏描述重点实验室;
【基金】：中国石油天然气股份有限公司重大科技专项“地震沉积学分析技术研究与软件系统优化”(2014B-0311) 国家重大科技专项“岩性地层油气藏成藏规律、关键技术及目标评价”(2011ZX05001-003)联合资助
【分类号】：P618.13;P618.13

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