流体包裹体与盆地油气的生成和演化

FLUID INCLUSIONS AND THEIR RELATION TO THE FORMATION AND EVOLUTION OF OILGAS IN A BASIN

通过流体包裹体研究表明，在中国东部具备“生、储、盖”条件的新生代沉积盆地内油气生成和演化与其中流体包裹体均一温度的高低有密切关系（即与古地温有密切关系）。均一温度为９０～１３０°Ｃ时出现低成熟度油田；均一温度为１３０～１５５°Ｃ时出现高成熟度油气田；均一温度为１５５～１８０°Ｃ时出现过高成熟度气田；当均一温度大于２００°Ｃ时，油气田遭到破坏，留下沥青残物。有机包裹体的成分和含量也可以作为油气田成熟度的良好判据。

Studies on fluid inclusions show that there is a close relation between the formation & evolution of oilgas and the variation of homogenization temperature of fluid inclusions in Cenozoic sedimentary basin with “formation,storage and coverage” conditions in East China.There appears lower matured oil field when the homogenization temperature of fluid inclusions is 90 to 130°C;There emerges high matured oilgas field when the homogenization temperature of fluid inclusions is 130 to 155°C;There comes forth over matured gas field when the homogenization temperature of fluid inclusions is 155 to 180°C.If the homogenization temperature of fluid inclusions is more than 200°C,oilgas field will be destroyed,and only bitumen remains will be left.Composition and content of organic inclusions are also good criteria for maturity of oilgas field.