松辽盆地兴城地区营一段火山岩岩性、岩相及孔隙结构特征研究

综合应用岩心观察,在普通、铸体薄片镜下鉴定,以及岩石化学分析及高速压汞等的多种手段,对松辽盆地兴城地区营城组一段火山岩岩石类型、岩相、孔隙、裂缝特征进行了深入的分析研究,从成岩作用、岩性、岩相等角度分析了储层影响因素。研究表明：该区火山岩划分为火山熔岩和火山碎屑岩两大类,其中石泡流纹岩、球粒流纹岩及熔结凝灰岩为有利储层。岩相划分为5相16亚相,其中喷溢相上部亚相和顶部亚相、爆发相热碎屑流亚相为有利储集相带,提出了研究区火山岩岩相模式和岩相演化规律。

Study on the Characteristics of Volcanic Lithology, Facies, and Pore Structure at the First Member of Yingcheng Formation in Xingcheng Area, Songliao Basin

The volcanic rock types, characteristics of lithofacies, pores, and fractures are further analyzed and studied by means of core observation, identification of common slice and casting slice under the microscope, rock chemical analysis and high-speed mercury penetration. The factors influencing reservoirs are analyzed from the perspectives of diagenesis, lithology, and lithofacies. Volcanic rocks in the studied area can be classified into two major categories, i.e., volcanic lava and pyroclastic rocks, of wh...