基于熵权TOPSIS法的低渗透砂岩储层流动单元划分  

Division of Flow Units of the Low Permeability Sandstone Reservoir Based on Entropy-Weighting TOPSIS Method

作　　者：董凤娟[1] 卢学飞[2] 琚惠姣 孙卫[4] 

机构地区：[1]西安石油大学石油工程学院,西安710065 [2]西安石油大学理学院,西安710065 [3]甘肃煤田地质勘查院,兰州730000 [4]西北大学大陆动力学国家重点实验室,西安710069

出　　处：《地质科技情报》2012年第6期124-128,共5页Geological Science and Technology Information

基　　金：国家科技支撑计划项目"低(超低)渗透油田高效增产改造和提高采收率技术与产业化示范"(2007BAB17B00)

摘　　要：为了使储层流动单元划分结果更具有客观性,应用熵权TOPSIS法,以丘陵油田三间房组储层为例,选取孔隙度、渗透率、粒度中值、饱和度中值压力、退汞效率和含油饱和度6个参数,将研究区储层划分为E、G、M、P 4类流动单元。研究表明,不同类型的流动单元有着不同的微观孔隙结构特征,其孔隙类型、接触方式、喉道类型、连通性和驱油效率都存在着明显差异。熵权TOPSIS法具有较好的综合判别能力,划分的各类储层流动单元特征明显,为储层流动单元的划分及评价提供了一条新的思路。To make the result of flow units more objective, the new method--entropy-weighting TOPSIS, and six parameters which reflect the macroscopic properties, micro-structural characteristics and oil-bear-ing property, porosity, permeability, oil saturation, saturation in the value of pressure, back efficiency and clay content of mercury have been selected to divide flow units of Sanjianfang reservoir in Qiuling oil- field. Reservoir flow units of the research area can be divided into E, G, M, P 4-type mobile units. The research indicated that the characteristics of pore structures in different flow units are different. Pore types, contact modes, throat types, connectivity, combination of pore and throat, and displacement effi- ciency in different flow units are obviously disparate. Hence the entropy-weighting TOPSIS method offers a brand new way for the division and evaluation of flow units because of its high comprehensive distinguis-hing ability and the characteristics of dividing flow units are obvious.

关 键 词：流动单元 熵权 TOPSIS法 评价指标 储层 

分 类 号：P618.130.21[天文地球—矿床学]