火山熔岩储层次生孔隙类型的岩相学研究——以克拉美丽气田石炭系滴西17井区为例  

Petrography Study on the Secondary Pore Types of Volcanic Lava Reservoirs——A Case Study from Carboniferous Well Block Dixi 17 of Kelameili Gasfield

作　　者：郗爱华[1] 刘豇瑜[1] 熊益学[1] 周慧[1] 孙圆辉 

机构地区：[1]西南石油大学,四川成都610500 [2]中油勘探开发研究院,北京100083

出　　处：《特种油气藏》2012年第5期26-29,152,共4页Special Oil & Gas Reservoirs

基　　金：国家重点基础研究发展计划"973"项目"火山岩气藏有效储层内部结构特征及渗流规律"(2007CB209507)

摘　　要：依据岩心资料,通过岩石薄片和铸体薄片观察发现,该区火山熔岩发育不同类型的次生孔隙,主要包括斑晶溶孔、基质溶孔、杏仁体溶孔、交代蚀变假杏仁体溶孔、构造缝和溶蚀缝等类型。研究发现,各种次生孔、缝在演化上存在内在的联系,其形成机理是1个复杂多变的地质过程,主要受火山岩矿物成分、溶蚀作用类型和构造作用的制约。火山熔岩铁镁质矿物含量越高,溶蚀作用和构造作用越强烈,储层储集物性越好,产能越高。因此,对火山熔岩储层进行详细的岩相学研究,有助于进行火山岩储层的评价和预测。The secondary pores,such as the dissolved pores of phenocryst,stroma,amygdale and metasomatic alteration pseudo-amygdale and the fractures of structure and dissolution,grow in the volcanic lava of the area in the light of core data and the observation of rock slices and cast body slices.The study shows that in evolution there exists an inherent link among the secondary pores and fractures,whose mechanism is a complex and versatile geology process controlled by the mineral components,dissolution action types and structural action of the volcanic lava.The higher the content of minerals containing in the volcanic lava,the stronger the dissolution action types and structural action are,the better the reservoir properties are and the higher the productivity is.Therefore,the detail study on petrography of volcanic lava reservoirs is conducive to the evaluation and prediction of volcanic lava reservoirs.

关 键 词：次生孔隙类型 火山熔岩 石炭系 滴西17井区 克拉美丽气田 

分 类 号：TE122.3[石油与天然气工程—油气勘探]