基于测井资料的储层流动单元划分——以尕斯库勒油田为例

Reservoir Flow Unit Division of Gasikule Oilfield Based on Logging Information

依据尕斯库勒油田实际资料,分析了粒度中值、泥质体积分数、灰质体积分数、孔隙度与渗透率以及与测井曲线之间的关系,建立了一套直接利用测井资料进行储层流动单元划分的技术方法,实现了流动单元纵向上的连续自动划分。采用聚类分析方法,把储层划分为E、G、M和P 4类,平面上流动单元的分布主要受沉积微相控制,E、G类流动单元主要沿水下分流河道的主流线分布,G类流动单元主要分布在河口砂坝和河道侧缘,M类流动单元分布在席状砂部位,P类流动单元零星分布在砂体尖灭的边缘部位。

The essence of the flow unit is that the reservoir lithology, grain size, shale content, limy content, porosity, permeability and other characteristics are similar and the influent characteristics are consistent in the same flow unit. This paper analyses the relationship of median grain diameter, shale content, carbonate content and porosity with permeability and logging curvee based on the actual information of Gasikule Oilfield. it then establishes a set of technology that can directly utilize logging information to divide flow units, thus realizing continuous and automatic division of flow units in vertical direction. By cluster analysis, reservoir flow units are divided into four classes： E, G, M and P. The distribution of flow units in plane is chiefly controlled by sedimentary microfacies. Flow units of E and G are chiefly distributed in the main stream line of underwater distributary channel, while flow units of M are mainly situated in the channel mouth bar, and P chiefly in the sand sheet or pinch--out boundary of the sand body.