柴达木盆地狮子沟地区中深层储集空间形成机制  

Formation Mechanism of Middle-Deep Reservoir Space in Shizigou Area in Qaidam Basin

作　　者：孙平安[1] 曹剑[1] 冯进来[1] 胡凯[1] 刘云田 王国彦 杨树逸 

机构地区：[1]南京大学地球科学系,南京210093 [2]中国石油青海油田分公司,甘肃敦煌736202

出　　处：《新疆石油地质》2010年第1期37-39,共3页Xinjiang Petroleum Geology

基　　金：国家自然科学基金项目(40602014和40872086)

摘　　要：柴达木盆地狮子沟地区目前发现的油气主要聚集于中深层古近-新近系,其储集空间基本类型主要包括剩余原生粒间孔隙、次生溶蚀孔洞和裂缝,并形成5类储集空间组合。具有储渗意义的储集空间类型主要是次生溶蚀孔洞和裂缝。受压实作用和胶结充填作用以及沉积环境的影响,剩余原生粒间孔隙不甚发育,而次生溶蚀孔洞和构造裂缝发育。除了油源流体外,大气降水可能在有效储集空间的形成中起到过重要作用。Petroleum in Shizigou area in southwestern Qaidam basin is mainly found in the middle-deep reservoirs of Tertiary, where the types of reservoir space generally include remained primary intergranular pore, secondary solution pore and fracture. These types may form five combinations of reservoir spaces. The favorable reservoir spaces cover secondary solution pore and fracture. The remained primary intergranular pores are normally undeveloped due to sedimentary environment, compaction, cemented fill and diagenesis, while the secondary solution pore/vug and fracture are relatively developed because of dissolution and tectonic/structural fracture effects. Besides hydrocarbon fluid, the meteoric water may play an important role to the formation of effective reservoir spaces.

关 键 词：柴达木盆地 狮子沟地区 古近系 新近系 储集层 

分 类 号：TE112.21[石油与天然气工程—油气勘探]