不同流动单元储层特征及其对注水开发效果的影响——以丘陵油田三间房组储层为例

Reservoir Characteristics of Different Flow Units and Its Influence on Waterflooding Effectiveness:Taking Sanjianfang Reservoir as an Example

针对丘陵油田三间房组油藏的特点,选取能反映储层物性、沉积特征及流体性质的主要参数(如孔隙度、渗透率、砂体厚度和含油饱和度)对流动单元进行了划分。以研究区7口取心井分析化验资料为基础,分析了不同流动单元的储层特征,同时结合油田生产动态资料对流动单元划分的合理性进行了验证。研究结果表明:①研究区流动单元可以分为E、G、M、P 4类,不同流动单元所处相带位置不同,物性和含油性依次变差;②不同流动单元的岩性、黏土含量、填隙物的相对含量、孔隙类型及连通情况等储层特征不同;③不同流动单元的生产动态特征存在明显差异,M类流动单元目前动用程度较低,剩余油富集。因此,要加强M类流动单元的改造措施,从而改善油田整体的注水开发效果。

Sanjianfang oil reservoir of Qiuling Oilfield in Turpan-Hami Basin is divided into different flow units based on its physical properties,depositional features and fluid property. Depositional features of different flow units have been analyzed, and the reasonableness of the flow units division has been verified based on dynamic data of the Qiuling Oilfield. The study results show..1） There are four kinds of flow u- nits, such as units E, G, M and P which are always located in different face positions each with a successive decreasing physical property and oil-bearing properties. 2） Different units display diversified reservoir characteristics in pore types, lithology, clay content, relative content of tuff fillings and connectivity. 3） The product dynamic characters of different flow units are obviously disparate. It is discovered that M flow units contain oil-rich residuals because of poor production. Therefore, reformations should be reinforced in M flow units so as to enhance the waterflooding effectiveness of whole oilfield.