关键词: 变质岩, 火山岩, 油气藏类型, 油气藏特征

Abstract: There are a series of metamorphic and volcanic rock reservoir in China. They can be divided into four types that are basment rock weathering crust type, basement rock fracture belt type, volcanic rock eruption in sedimentary rock type and intrusive volcanic in sedimentary rock type. The characterizations of
the metamorphic and volcanic rock are:①The reservoir is multi-type, but the basement rock weathering crust is principal type.②There are gas accumulation and gas cap oil accumulation, but the oil accumulation is principal.③The small scale of oil accumulation is principal, but there is the big scale sometimes.④The reservoir of volcanic rock is more multiple than metamorphic rock..⑤The production is very different. The production of some well is very high, but some production is low. The well of high production lies in near the fracture.⑥
The effect of the water injection isn’t good. The water breakthrough of the well of high production is very fast and there isn’t water absorption of the well of low production.⑦The production decline of oil well and oilfield is very great.⑧The recovery isn’t high, they are 8%-15% or so, the principal recovery is 11%-13%.

Key words: metamorphic rock, volcanic rock, reservoir type, reservoir characterization