不连续界限地震响应与复合砂体构型研究——以渤海P油田Ⅳ-2层为例
Seismic Response of Reservoir Discontinuity and Architecture of Compound Sandbody——A Case Study of Ⅳ-2 Layer in P Oilfield of Bohai Bay
马子麟 1范洪军 1王海峰 1何明薇1
作者信息
- 1. 中海油研究总院有限责任公司,北京 100028
- 折叠
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.
Abstract
Study on reservoir discontinuity detects changes in multi-seismic attributes and an-alyse 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 sand-body 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 posi-tion 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 con-structed 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 ar-ea,showing the Ⅳ-2 layer can be further divided into three period of channel belt deposi-tion,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 archi-tecture analysis.
关键词
复合砂体/不连续界限/地震波偏度/储层构型Key words
compound sandbody/reservoir discontinuity/skewness/reservoir architecture引用本文复制引用
基金项目
海洋石油高效开发国家重点实验室开放基金(2018-YXKJ-002)
出版年
2024
NETL
NSTL
万方数据