摘要
松辽盆地长岭断陷长深1号气田蕴含着丰富的天然气资源,其中有超过70%的储量位于火山岩储层中,具有岩性复杂、孔洞缝特征各异、有利区带预测困难等特点。为此,开展了岩心观察、岩屑和铸体薄片分析、ECS成分识别以及FMI岩石结构和构造解释研究,识别出火山熔岩和火山碎屑岩2大类共8种火山岩岩性和气孔、溶孔、粒间孔、构造缝、溶蚀缝、炸裂缝等13种主要储集空间类型。通过孔洞缝成因机制分析和组合特征研究,基本搞清了自碎角砾化熔岩、气孔流纹岩等主要岩性的孔洞缝发育特点及演化历史,最终建立了火山岩储渗模式,为储层预测和寻找有利勘探区带提供了参考。
Multiple volcanic lithology is found in Changshen 1 volcanic gas reservoirs and different lithology has different pore-fracture patterns in this area. The forming mechanism and evolution history of different pores and fractures is thoroughly analyzed using the core sample, casts thin slice and debris thin slice data. Accordingly, the relationship between lithology and pores as well as lithology and fractures are established and the pore fracture type and combination characteristics in different lithology have been clarified, too. The research is of great significance to the qualitative prediction of the reservoir physical property and to the quick determination of the advantageous reservoir through lithology identification.
出处
《天然气地球科学》
EI
CAS
CSCD
2008年第5期630-633,共4页
Natural Gas Geoscience
基金
国家重点基础研究发展规划(“973”)项目(编号:2007CB209507)资助
关键词
长深1号气田
火山岩
岩性特征
孔缝组合
储渗特征
Changshen 1 gas field
Volcanic rocks
Lithologic characteristics
Pore-fracture grouping
storage-permeation characteristics
