辫状河三角洲砂体内部构型表征及剩余油分布规律研究

Characterization of internal architecture of braided river delta sand bodies and distribution law of remaining oil

为了进一步剖析辫状河三角洲前缘储集层内部构型,深入挖掘该类储集层内剩余油,以北大港地区唐家河油田东三段辫状河三角洲沉积为例,通过储集层内部构型解剖,开展唐家河油田东三段辫状河三角洲沉积构型界面级次划分,并对单一分流河道或河口坝及其内部增生体进行构型分析,建立了三维构型模型,精细刻画河道砂体及内部夹层展布规律,进而分析构型控制下的各单砂体剩余油分布规律。研究成果用于唐家河油田东三段高水淹和低动用区块的综合调整治理,取得了较好效果,对同类储集层的构型研究和油藏开发调整具有借鉴意义。

In order to further analyze the internal architecture of braided river delta front reservoir and to tap remaining oil in the reservoir,the braided river delta deposition in Dong Ⅲ formation of Tangjiahe oilfield in Beidagang area was taken as an example. Through the anatomy of the internal architecture of the reservoir,the interface grade division of the braided river delta sedimentary architecture in Dong Ⅲ formation of Tangjiahe area was carried out. The architecture analysis of single distributary channel or mouth bar and its internal accretion sand bodies was carried out. A three-dimensional architecture model was established,and the distribution law of the channel sand body and internal interlayer was finely characterized to analyze the distribution law of remaining oil of each single sand body under the architecture control. The research results have been used in the comprehensive adjustment and management of blocks with the high water flooding and low degree of development in Dong Ⅲ formation,and achieved good results,which can be used for reference to the architecture study of similar reservoirs and the development and adjustment of oil reservoirs.