摘要
孔隙结构是影响储层物性的重要因素。采用压汞分析技术,对姬塬油田长6油层组储层微观孔隙结构特征进行了深入的研究。结果表明,姬塬油田长6储层属于中孔、特低渗储层,孔喉分选性、连通性一般。根据孔隙结构特征相关参数将毛管压力曲线分为4类,研究区主要以Ⅰ类和Ⅱ类为主。从Ⅰ类到Ⅳ类,排驱压力和中值压力逐渐增大,中值半径和平均喉道半径逐渐减小,反映出储层的孔隙结构和渗流能力由好变差。
Pore structure has an important effect on reservoir properties.By mercury injection method,the microscopic pore structure characteristics of Chang 6 reservoir of Jiyuan oilfield are studied.The result shows that Chang 6 reservoir belongs to mid-porosity and ultra-lowpermeability reservoir of Jiyuan Oilfield.The pore and throat have general sorting and communication.The capillary pressure curve is divided into 4 types according to the characteristic parameters of pore structure.The type I and II are the main types in the study area.With capillary pressure curve changing from I type toIVtype,the driving pressure and Pc50 increase gradually,and Re50 and average pore throat radius decrease gradually,which reflects that pore structure and reservoir property change from good to poor.
出处
《石油化工应用》
CAS
2013年第2期16-20,24,共6页
Petrochemical Industry Application
关键词
孔隙特征
毛管压力曲线
长6油层组
pore structure
capillary pressure curve
Chang 6 reservoir
