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成岩作用研究和包裹体观测表明,琼东南盆地发育7种类型包裹体.根据这些包裹体的荧光特征、气液比和捕获温度,以及盐度和有机/无机组分等特征认为,琼东南盆地存在3期热流体活动,其中第2、第3期活动热流体与油气运聚有关,其温度分别介于140～150℃和170～190℃之间;天然气以水相运移的机制以及与热流体活动的密切关系控制了盆地天然气的成藏作用.
Diagenesis and inclusions observation show that there are 7 types of inclusions in Qiongdongnan basin.According to the characteristics of fluorescence, gas-liquid ratio and temperature, as well as salinity and organic / inorganic components of these inclusions, There are three thermal fluid activities, of which the second and third active thermal fluids are related to hydrocarbon migration and accumulation, and the temperatures are between 140-150 ° C and 170-190 ° C respectively. The mechanism of migration of natural gas to the aqueous phase, The close relationship between thermohydrodynamic activities controls the accumulation of natural gas in the basin.