三塘湖盆地马朗凹陷石炭系火山岩储层有机包裹体特征及成藏期次分析

通过对三塘湖盆地有机包裹体类型、均一温度及荧光特征等的研究,结合研究区埋藏史和古地温资料综合分析认为:卡拉岗组油藏有3期明显油气充注,第1期发生于晚二叠世--晚三叠世,有机包裹体主要分布于方解石脉中,以液态烃相包裹体为主,丰度低、成熟度低,对油气成藏贡献小;第2期发生于晚三叠世--白垩纪中晚期,有机包裹体主要分布于孔洞充填方解石及孔洞充填石英中,丰度高,是卡拉岗组油气藏的主要形成时期;第3期发生于白垩纪晚期以后,有机包裹体主要分布于孔洞里充填的方解石中.

Characteristics of Fluid Inclusions and Their Application to Determining the Times and Stages of Carboniferous Volcanic Hydrocarbon Reservoirs in Malang Sag, Santanghu Basin

Types of fluid inclusions and their homogenization temperature, fluorescent indicator of organic inclusions, the burial history and the paleo-temperature history of the basin indicate that there are three hydrocarbon charges: the Late Permian-Late Triassic period, the Late Triassic-Middle Late Cretaceous pe-riod and the period after the Late Cretaceous. The first stage inclusions mainly are distributed in the calcite veins with low abundance and low maturity. The second stage inclusions are distributed in the calcite and quartz which fill in pores. The second stage inclusions are abundant and this stage is the main hydrocarbon accumulating stage. The third stage inclusions are distributed in the calcite filling in pores.