花岗岩和火山岩油气藏的形成及其勘探潜力

随着花岗岩油气藏和火山岩油气藏不断被发现，其油气来源和成藏模式也备受关注，近代研 究表明，花岗岩和火山岩中有大量的烃可成为油气藏的物质基础。通过固体力学、流体力学 的研究否定了油气倒灌成藏的模式，认为油和气只能是向上垂直运移或侧向运移。通过研究 花岗岩和火山岩油气藏的形成模式，指出大火成岩省、地幔柱与油气的关系表明盆地中地壳 的低速—高导层可能是油气的主要来源，而花岗岩、火山岩的风化壳是油气成藏的最佳储集 层，断裂则是其最主要的运移通道，花岗岩和火山岩油气藏将是未来勘探的重要目标。

FORMATION OF GRANITE AND VOLCANIC ROCK RESERVOIRS AND THEIR ACCUMULATION MODEL

The granite and volcanic rock reservoirs are greatly concerned for their large reservoirs,such as: White Tiger Oilfield in Vietnam and Qingshen Gasfield in China.There are many hydrocarbons in such types of rocks,and these hydrocarbons can be the sources of the reservoirs.According to the theory of solids and fluids,the fluid or hydrocarbon expulsion in rocks is impossible and hydrocarbon flowing backward is also impossible.The relationships between large igneous rock province,mantle plume and petroleum show that there is a low velocity-high conductive layer of mid-crust in the basin and this layer is the main source of oil and gas.Weathered granites and volcanic rocks are the best reservoir beds for hydrocarbon accumulation and the faults are the main migration pathway.It is suggested that granite and volcanic reservoirs be the future exploration targets.