下寺湾油田柳评15井区长2储层微观孔喉特征研究

Research on Characteristics of Microscopic Pore Throat of Chang 2 Reservoir in Liuping 15 Well area of Xiasiwan Oilfield

利用常规与恒速压汞、核磁共振等实验资料对下寺湾油田柳评15井区长2储层的储集空间、孔隙结构类型及喉道类型特征进行研究.结果表明,残余粒间孔和长石溶孔为该区的主要储集空间,晶间孔分布较少,该区储层的孔喉结构类型可分为三种类型.其中Ⅰ类储层的储集空间类型较好,喉道发育程度较好;Ⅱ类、Ⅲ类储层的储集空间类型较差,喉道发育程度较差.

In this paper,the characteristics of reservoir space,pore structure type and throat type of Chang 2 reservoir in Liuping 15 well area of Xiasiwan oilfield are studied by using the conventional and constant velocity mercury injection and the nuclear magnetic resonance data,etc.The results show that the residual intergranular pore and feldspar solution pore are the main reservoir space in this area,and the distribution of intergranular pore is less.The pore throat structure of reservoirs in this area can be divided into three types.Among them,the reservoir space type of type I reservoir is better,and the throat development degree is better;the reservoir space type of type II and III reservoir is poorer,and the throat development degree is poorer.