徐家围子断陷火山岩储层次生孔隙分布及意义  

SECONDARY PORE DISTRIBUTION AND ITS SIGNIFICANCE OF VOLCANIC RESERVOIRS IN XUJIAWEIZI FAULT DEPRESSION

作　　者：王成[1,2] 邵红梅[2] 张安达[2] 洪淑新[2] 李亚香[2] 刘会杰[2] 

机构地区：[1]中国地质大学,北京100083 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2010年第5期1-5,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重点基础研究计划＂973＂项目（2009CB219307）资助.

摘　　要：火山岩是松辽盆地深层天然气最重要的储层.通过对火山岩储层岩石矿物学特征、物性特征、孔隙类型及成因、岩相与物性关系等系统研究后发现,火山岩次生孔隙不仅大大增加了有效储集空间,同时还对原生气孔的沟通起着决定性的作用,次生孔隙是松辽盆地火山岩成为有效储层的前提.火山岩总孔隙度与岩心分析有效孔隙度比值可以反映次生孔隙的发育程度,比值越接近1,孔隙就越发育.次生孔隙纵向上发育在大段火山岩的岩相和岩性界面部位,厚度几米至几十米,是淋滤及溶蚀等综合作用的结果.Volcanic rock is the most important deep gas reservoir in Songliao Basin. The mineralogical characteristics and physical property characteristics, pore type and genesis, relationship of rock facies and physical propcries of volcanic reservoir rock are systematically studied, and the result shows that the secondary pores in volcanic rocks not only increase the effective storage space, but also play a critical role for connection of primary pore. The secondary pores are the precondition of volcanic rocks in Songliao Basin becoming effective reservoirs. The development degree of secondary pores can be reflected by the ratio of total porosity of volcanic rock to effective porosity from core analysis. The closer the ratio is to 1, the better the pore is developed. Vertically, the secondary pores are developed at the interface between rock facies and lithology of large volcanic rock section. The thickness ranges from several meters to decades of meters, which is the composite result of leaching and corrosion.

关 键 词：徐家围子断陷 火山岩储层 次生孔隙 

分 类 号：TE122.222[石油与天然气工程—油气勘探]