摘要
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。
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 which the lithophysa rhyolite, pellets rhyolite and ignimbrite are favorable reservoirs. Lithofacies can be divided into 5 facies and 16 subfacies. The upper subfacies and the top subfacies of eruptive facies as well as the hot debris flow subfacies of explosive facies are favorable reservoir facies. In addition, the pattern of volcanic lithofacies and the law of facies evolution of the studied area are proposed in this paper.
出处
《中国石油勘探》
CAS
2009年第1期24-29,共6页
China Petroleum Exploration
关键词
火山岩类型
岩相
孔隙结构特征
储层
volcanic rock type
lithofacies
characteristics of pore structure
reservoir
