Fluid inclusion: a tracer of hydrocarbon and thermal fluid migration in Yingqiong basin.
莺琼盆地流体包裹体对热液活动及油气运移的示踪作用

Fluid inclusion is an efficient tracer to understand the subsurface thermal fluid and hydrocarbon migration, however, it has some uncertainties in determining maximum paleotemperature and its precise period. In order to estimate the reliability of homogenization temperatures, a mathematical model for laboratory homogenization temperature measurement is set up based on mass conservation theory. The formula indicates that bigger fluid inclusions are more precise in determining forming temperatures. The case study of Yingqiong Basin shows that the homogenization temperatures of the inclusions are dominated by thermal fluid from 3000~4000m near fracture zone, and the forming condition of the fluid inclusions indicates a close relation with the overpressure beds, hydrocarbon generation, expulsion and migration. This conclusion is agreeable with the observation data of vitrinite reflection ratio and some borehole temperatures.