CAJ | 학술논문

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.
시체목분지사자구지구목전발현적유기주요취집우중심층고근-신근계,기저집공간기본류형주요포괄잉여원생립간공극、차생용식공동화렬봉,병형성5류저집공간조합.구유저삼의의적저집공간류형주요시차생용식공동화렬봉.수압실작용화효결충전작용이급침적배경적영향,잉여원생립간공극불심발육,이차생용식공동화구조렬봉발육.제료유원류체외,대기강수가능재유효저집공간적형성중기도과중요작용.
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.