云南油页岩资源现状及潜力分析

AN ANALYSIS OF THE PRESENT SITUATION AND POTENTIALITY OF OIL SHALE RESOURCES IN YUNNAN

截止目前云南已知油页岩矿点20余处,资源量1.58亿吨,折合页岩油550万吨;含油页岩岩系自寒武系下统—新近系上新统,主要赋存于下寒武统、中泥盆统近底部、中侏罗统、上白垩统和新近系中新统、上新统等层位。除下古生界为滨海—海湾泻湖相和滨外平原相外,其他则为内陆湖泊相。大部分矿点油页岩厚度可以达到最低可采厚度1m以上,含油率也达到或超过油页岩边界品位4ω%。下古生界油页岩含油率普遍较高,最高含油率可达27.07%。云南油页岩矿资源有望成为重要的非常规油气资源。

Up to now, there are more than 20 known oil shale occurrence spots in Yunnan, resource amount 158 million t, convertible into shale oil 5. 5 million t. The rock series with oil shale are from Cambrian Lower Se- ries to Neogene, mainly in Lower Cambrian, Middle Devonian near bottom, Middle Jurassic, Upper Cretaceous, Neogene Miocene and Pliocene, etc. As to the sedimentary type, the others are inland lacustrine facies besides Lower Paleozoic is littoral - bay lagoon facies and offshore plain facies. The thickness of oil shale is over the lowest minable thickness lm. And the oil - bearing ratio can meet or over the boundary grade of oil shale 4%. The oil - bearing ratio of Lower Paleozoic oil shale is rather high generally, the highest oil - bearing ratio is to 27. 07 %. It is desirable that the oil shale in Yunnan will become an important non- routine oil- gas resources.