定边油田东仁沟区长2油层组储层特征描述

Describe the characteristics of the 2 reservoir group in Dingbian oilfield dongin Gou Chang

定边油田东仁沟区长2油层组属于三角洲平原体系,发育沉积微相包括分流河道、天然堤、分流间湾以及决口扇。研究区长2油层组储层砂岩类型主要是长石砂岩,孔隙类型主要为粒间孔为主,长2油层组储层物性较差,主要为低孔-低渗到特低孔-特低渗储层,主要以Ia、Ib、其次为IIa、IIb。

The Chang-2member the Yanchang formation of Dongrengou is delt plain sedimentary system,includes distributary channel,natural levee,distributary bay,crevasse splay.Based on all the research of slice show that the reservoir sandstone is feldspar sandstone.Pore type is intergranular pore.Chang-2member of the Yanchang formation is the reservoir with low pore and low permeability and primary is type I and typeII.And the research shows that the distribution of reservoir is bad.