西藏羌塘盆地中生代以来火山岩与油气的关系  

Relationship between volcanic rocks and hydrocarbon origins in the Qiangtang Basin after Mesozoic in North Tibet

作　　者：南征兵[1] 李永铁[1] 张艳玲[2] 

机构地区：[1]中国石油勘探开发研究院 [2]中国地质环境监测院

出　　处：《天然气工业》2010年第2期45-47,共3页Natural Gas Industry

摘　　要：西藏羌塘盆地为我国陆上油气资源潜力巨大的一个中生代海相残留盆地,火山喷发频繁,尤以中生代为甚。通过对中生代以来火山岩时空分布规律及流体包裹体的研究,对火山岩与油气的关系进行了初步探讨。结论认为:盆地的烃类物质可能来自壳幔深部和浅层两方面,即盆地油气的一部分为生物成因,另一部分则可能为非生物成因;盆地内的部分火山岩可作为有效储层和盖层,岩浆热事件既可以加快烃源岩的热成熟,但同时也可能破坏掉已生成的油气藏。The Qiangtang Basin is a Mesozoic marine residual basin on the main land of China with a great potential of hydrocarbon resources,where volcanic activities occur frequently especially in Mesozoic era.Through in-depth investigation into the time-space distribution law of volcanic rocks and inclusions since the Mesozoic era,a preliminary study was made on the relationship between volcanic rocks and hydrocarbon origins.Conclusions were drawn as follows:a.Hydrocarbon matters may come from either the deep crust-mantle or the shallow formations,i.e.,some hydrocarbon may be biogenesis,and others abiogenesis;b.Some volcanic rocks within this basin can be taken as favorable reservoirs or cap rocks,and magmatic thermal events could accelerate the thermal evolution of hydrocarbon source rocks but could possibly destroy the formed hydrocarbon reservoirs.

关 键 词：羌塘盆地 中生代 火山岩 包裹体 油气成因 时空分布 岩浆活动 

分 类 号：P618.13[天文地球—矿床学] P618.130.2[天文地球—地质学]