浪控滨岸相储层构型要素分析

 储层构型分析是开发中后期油藏研究的核心之一,是剩余油表征的重要手段。以塔里木盆地小海子野外露头及油藏覆盖区钻井取心资料为基础,采用Miall构型要素分析方法,揭示了浪控滨岸相储层构型要素类型及特征。根据地层单元沉积构造、岩性、粒度成分等特征的差异性,将浪控滨岸相储层构型界面划分为七个级次,而不同级次构型界面控制着相应级次的构型单元。二级构型单元表现为单一岩相类型,根据储层的岩性及层理特征,结合不同岩相对油气开发的控制作用,将二级构型单元划分为13种类型。根据二级构型单元时空关系,以三级构型界面为约束条件,参考储层内部渗流屏障产状,将三级构型单元划分为板状、槽状、楔状和千层饼状四种类型。浪控滨岸相储层构型要素的厘定,为储层精细刻画提供了理论依据,对高含水期油藏开发和综合调整具有重要的指导意义。

Architecture Analysis of Wave-controlled Coastal Reservoir

The architecture analysis is one of the most important keys of the reservoir development during the middle-late stage, as a new method for the characterization of the residual oil. Using the architecture analysis method proposed by Miall, this paper studies the architecture of the wave-controlled coastal reservoir, based on the field outcrop and cores of the Tarim basin. The sevenfold hierarchy of the architectural surface is identified, according to the differences in the sedimentary structure, the lithology and the particle size. Different architecture elements are controlled by the same hierarchy architecture surface. The second order architectural elements are of thirteen types. Each architectural element type is related to a special combination pattern of lithology and sedimentary structure, and different architectural element types have different control effects on the residual oil. The third order architectural elements are composed of different types of second architectural elements, constrained by the third order architecture surface. According to the occurrence of the flow barrier, four types of third order architectural elements are identified, namely, the tabular element, the wedge-like element, the cross element and the multilayer element. The classification of the coastal reservoir architecture provides a theoretical basis for detailed reservoir research, and it also has a guiding significance for reservoir development.