渤海湾盆地南堡2-1区馆陶组辫状河储层构型精细表征  

Fine Characterization of Braided River Reservoir Architecture fromthe Guantao Formation in the Nanpu2-1 Block, Bohai Bay Basin

作　　者：余成林 徐波[1] 曾诚[1] 李彦泽 YU ChengLin;XU Bo;ZENG Cheng;LI YanZe(Nanpu Oilfield Operation District of Jidong Oilfield Company,PetroChina,Tangshan,Hebei 063200,China)

机构地区：[1]中国石油冀东油田分公司南堡作业区,河北唐山063200

出　　处：《沉积学报》2024年第1期219-227,共9页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目(51704303)。

摘　　要：【目的】辫状河储层砂体结构及其渗流屏障的空间分布是影响南堡2-1区块注水开发效果的关键地质因素。【方法】综合应用岩心、测井和三维地震资料,基于辫状河储层四级构型单元空间分布为目标开展储层精细表征。【结果】依据密井网解剖,识别出南堡2-1区NgⅡ-6小层心滩、辫状河道和溢岸三种成因类型的四级构型单元,建立了四级构型单元的三种垂向叠置样式(心滩—心滩叠置、辫状河道—心滩叠置和溢岸—心滩叠置)和三种侧向叠置样式(心滩顺流前积叠覆型、辫状河道分隔心滩型和心滩—分流辫状河道型),采用均方根振幅和分频RGB融合地层切片技术,预测了南堡2-1区NgⅡ-6小层四级构型单元的平面分布,揭示了心滩储集单元的几何形态、规模大小及其与作为渗流屏障的辫状河道的接触关系。【结论】该研究结果为油田注水开发方案的优化调整、提高油田开发效果提供了直接的地质依据。[Objective]The sand body structure of a braided river reservoir and the spatial distribution of its seepage barrier are the key geological factors affecting the water injection development effect in the Nanpu2-1 block.[Meth-ods]This study comprehensively applies core,logging,and three-dimensional seismic data to conduct fine reservoir characterization based on the spatial distribution of level 4 architecture units in the braided river reservoir.[Results]According to the dense well pattern anatomy,the level 4 architecture units of three genetic types of braided bar,braided channel,and overflow in NgII-6(Neogene Guantao Formation II oil group 6th sublayer)of the Nanpu2-1 block are identified,and three vertical superposition types(braided bar-braided bar superposition,braided channelbraided bar superposition,and overflow-braided bar superposition)and three lateral splicing types(braided bar downstream progradation overlapping splicing type,braided channel separated braided bar type,and braided bar dis-tributing braided channel type)are established.Using the root mean square amplitude and frequency division redgreen-blue(RGB)fusion stratigraphic slicing technology,the plane distribution of level 4 architecture units from NgII-6 in the Nanpu2-1 block is predicted,and the geometric shape,scale,and contact relationship between braid-ed bar reservoir unit and braided channel as seepage barrier are revealed.[Conclusion]The research provides a di-rect geological basis for the optimization and adjustment of oilfield water injection development scheme and improving oilfield development effect.

关 键 词：辫状河 储层构型 分频RGB融合 馆陶组 南堡2号构造 

分 类 号：P618.13[天文地球—矿床学]