摘要
“不连续界限”研究通过识别多地震属性的变化位置,实现井震联合储层构型剖析。针对目前“不连续界限”研究对象主要为单期砂体这一现状,本文以渤海P油田Ⅳ-2层为例,提出两期叠置砂体不连续界限与储层构型研究方法,概括为“单井定期次、界限定边界、波形定结构”。首先,以单井构型识别和分类为基础,建立两期叠置砂体构型边界处4种结构的正演模型;然后在此基础上,总结了以界限类型和波形偏度为特征指标的砂体结构判别标准,指导剖面和平面构型研究。应用该方法剖析研究区储层结构,结果表明:本区Ⅳ-2层可进一步细分为三期曲流带沉积,曲流带宽度在150~385 m之间,曲流带之间的接触边界与废弃河道是阻碍渗流的主要不连续界限。动静结合验证,构型研究结果与动态响应相符,证明了本方法的可行性。
Study on reservoir discontinuity detects changes in multi-seismic attributes and analyse reservoir architecture through combination of seismic and well data.Considering that present reservoir discontinuity studies mainly focus on single-period sandbody,this study proposes a method to characterize the architecture of reservoir consisted of two-period sandbody and illustrate the process with the case study of IV-2 Layer in P oilfield of Bohai Bay.The method can be summarized as“deciding architecture type by well data,boundary position by discontinuity prediction,structure by waveform”.Firstly,four architecture types of two-period sandbody are classified based on well logging identification and classification of single well configuration.Then,the forward models of the four architecture types are constructed and a standard for sand structure decision is concluded using boundary types and skewness as two indicators.The method is used for the architecture anatomy of the study area,showing the IV-2 layer can be further divided into three period of channel belt deposition,whose width is 150~380 m,the lapping boundary and abandoned channel forms the flow-resisting discontinuity boundaries.The result is verified by dynamic interaction between wells,demonstrating the feasibility of this method to improve the accuracy of reservoir architecture analysis.
作者
马子麟
范洪军
王海峰
何明薇
Ma Zilin;Fan Hongjun;Wang Haifeng;He Mingwei(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China)
出处
《工程地球物理学报》
2024年第1期146-155,共10页
Chinese Journal of Engineering Geophysics
基金
海洋石油高效开发国家重点实验室开放基金(编号2018-YXKJ-002)。
关键词
复合砂体
不连续界限
地震波偏度
储层构型
compound sandbody
reservoir discontinuity
skewness
reservoir architecture
作者简介
第一作者:马子麟(1996-),男,助理工程师,硕士,主要从事油气田开发研究工作。E-mail:mazl3@cnooc.com.cn;通讯作者:范洪军(1977-),男,高级工程师,博士,主要从事油气田开发研究工作。E-mail:fanhj@cnooc.com.cn。
