扶余油田东16-2区块密井网曲流河储层构型分析

以扶余油田东16-2区块为例,探索了一套在油田开发中后期密井网条件下河流相储层构型的研究方法。在沉积相研究的基础上,结合研究区取心、测井、吸水剖面等静态、动态资料,以层次分析法为指导思想,分3个层次(单一河道、点坝、点坝内部侧积体)对研究区储层构型进行详细解剖。综合现代沉积的研究成果、经验公式以及对子井技术,计算出研究区侧积层的倾角为3°左右,宽度为35~70 m,建立了点坝砂体内部构型定量模式;结合动态资料,进行模式拟合,达到解剖点坝内部构型系统的目的;建立了点坝内部泥质侧积层控制的剩余油模式。点坝构型解剖成果在研究区得到了较好的应用,而且对类似油田储层精细研究以及剩余分布预测都有较好的借鉴作用。

Analysis on architecture of meandering river reservoir with dense well pattern in Block D16-2 of Fuyu Oilfield

Taking Block D16-2 of Fuyu Oilfield as an example, this paper explored the systemic analyzing methods of architecture of fluvial reservoir with dense well pattern at the late stage of oilfield development. Based on the sedimentary facies analysis, according to the static and dynamic data of the core, well logging amt water injection profile and guided by the analytic hierarchy process, three architecture hierarchies （single channels, point bars and lateral accretion sandbody） were identified. Combined with the research achievements of modern sedimentary, empirical formula forecasting and pairs well technology, the dip angle of lateral accretions was calculated to be about 3° and the width was 35 m to 70 m. Therefore, the quantitative model for architecture of point bars was established by these parameters. Combined with dynamic data, we carried on the model matching and accomplished the inner architecture analysis. Remaining oil distribution in the point bar was analyzed in detail. The application of anatomy result in study area has brought about good effects. This study provided a good reference for fine reservoir analysis and remaining oil distribution prodiction of other similar oilfields.