鄂尔多斯盆地马岭地区延长组长3储层特征及评价

Characteristics and Comprehensive Evaluation of Chang 3 Reservoirs of Yanchang Group in Maling Area,Ordos Basin

根据薄片鉴定、压汞资料、物性分析和测井资料,对鄂尔多斯盆地马岭地区长3储层特征进行深入研究,结果表明:马岭地区岩石类型以长石岩屑砂岩为主,储层发育良好,渗透率和孔隙度分别为1.48 m D、10.2%。根据储层评价标准,将研究区储层分为3类,主要以Ⅰ类、Ⅱ类为主。

This article is based on previous research in thin section identification,including mercury intrusion data,physical properties analysis,and log data.The characteristics of No.Chang 3 reservoirs of Yanchang group in Maling area of Ordos Basin werestudied.The results show that the reservoirs in the Maling area are well developed,and the rock types in the target layer are dominated by feldspar lithic sandstones and lithic feldspar sandstones.Permeability and porosity are 1.48 mD and 10.2% respectively.According to the reservoir evaluation criteria,the reservoirs in the study area were divided into three categories,mainly in Type 1 and Type 2.