对储层流动单元研究的认识与建议

RECOGNITION AND ADVICE ON THE STUDY OF RESERVOIR FLOW UNIT

概述了国内、外储层流动单元研究的基本思路和方法可大体分为两种类型 :第一种是以数学手段为主的储层参数分析法 ;第二种是近年来刚刚形成的以地质研究为主的储层层次分析法。针对大庆油田的地质特点和研究现状 ,论证了储层流动单元定量描述的主要对象应是泛滥—分流平原相中的大、中型河道砂体 ,其次是三角洲前缘相部分面积较大又不够均一的主体席状砂或坝状砂。论证了单元划分基础 ,提出了以渗透率为主要描述参数的适用性 ,这样可以避免造成大厚度低渗透层与小厚度高渗透层可能划为同一流动单元的错误。流动单元的三维地质建模工作还需紧密结合检查井和密井网的动态资料 ,尤其是露头详细研究所建立的“原型模型”。

This paper introduces two basic thoughts of China and abroad on reservoir flow unit study. According to the geologic characteristic and study status of Daqing Oil field, it illustrates the main object and unit division basis of the quantitative description of reservoir flow unit. Then it proposes the applicability with permeability as main description parameter and advice on 3D geologic modeling of flow unit. This can avoid the error of considering low permeable reservoir with large thickness and high permeable reservoir with small thickness as a same flow unit. The 3D geologic modeling of flow unit must be connected with the dynamic data of examination wells and dense pattern, especially the 'original model' constructed with precise study on outcrop.