灰色层次分析法在储层流动单元划分中的应用——以丘陵油田三间房组储层为例

Application of Grey Analytic Hierarchy Process to Divide Flow Units——A Case from Sanjianfang Formation of Qiuling Oilfield

定量与定性相结合的方法是储层流动单元研究的发展趋势。采用灰色层次分析法(GAHP),选取孔隙度、渗透率、含油饱和度、饱和度中值压力、退汞效率和泥质含量等6个参数,对丘陵油田进行了流动单元的划分。研究表明,本区储层可以划分为E、G、M、P4类流动单元:E类流动单元主要分布在水下分流河道中心部位,渗流能力最强,开发程度较高,但是易发生水淹;G类流动单元主要分布在水下分流河道,渗流能力较强,水淹程度较低,还存有一定的剩余油,是丘陵油田目前主要的生产动用层系;M类流动单元主要分布在水下分流河道和河道的边部,物性较差,目前动用程度较低,剩余油富集;P类流动单元主要分布在水下分流间湾部位,岩性致密,注入水很难波及到,目前几乎不具备开发价值。

The combination of quantitative and qualitative analysis is a development trend of research on reservoir flow units. The article gives a new methodgrey analytic hierarchy process（GAHP）,and six parameters which reflect the macroscopic properties, micro-structural characteristics and sedimentary environment characteristics., porosity, permeability, oil saturation, saturation in the value of pressure, back efficiency of mercury and clay content, have been selected to classify the flow units of Sanjianfang reservoir of Qiuling oilfield. The research indicated that reservoir flow units of the study area can be divided into 4-type mobile units as E, G, M, P. Type E mainly distributed in the center of underwater distributary channel with the strongest flow capacity, highest development degree and easily flooding. Type G mainly distributed in the underwater distributary channel with stronger flow capacity, low flooding degree and certain remaining oil. Type M mainly distributed in the underwater distributary channel＇s edge with poor physical properties, low operating level and rich remaining oil. Type P mainly distributed in the underwater distributary bay with dense lithology, the injected water is difficult to spread and almost has no development value.