鄂尔多斯盆地华庆地区长6_(3)储层特征评价与研究

Characteristics and comprehensive evaluation of Chang 6_(3) reservoir in Huaqing area,Ordos basin

依靠薄片鉴定压汞资料、薄片鉴定和测井资料、岩心观察等方法,对鄂尔多斯盆地华庆地区的长63储层特征,建立了储层分类标准,结果表明:华庆地区岩石类型主要是岩屑长石砂岩,长石溶孔、微孔为主要的储集空间,孔隙结构比较复杂,长6_(3)储集砂体在分类上属于低孔-特低孔、特低渗-超低渗储层。华庆地区长6_(3)储层根据储层分类评价的标准可以分为3类,以Ⅰ类、Ⅱ类为主。

This article is based on previous research in thin section identification,including mercury intrusion data,physical properties analysis,core observation and log data.The characteristics of the Chang 6_(3) reservoir in Huaqing area of the Ordos basin are systematically studied,and the standard of reservoir classification is established.The results show that the rock type of Chang 6_(3) reservoir is mainly characterized by lithic feldspathic.The reservoir space is dominated by feldspar dissolving holes and micropores.Where pore structure is complex with strong heterogeneity,it belongs to reservoir with low porosity-extra low porosity,extra-low permeability and ultra-low permeability.According to the reservoir evaluation criteria,the reservoirs in the study area were divided into three categories,mainly in Type 1 and Type 2.