In combination with the evolutionary process simulation of burial history and geothermal history of Xifeng oilfield in Ordos basin

microfluorometric technology and microscopic thermometry technology of inclusion have been applied in the study

which indicates that hydrocarbon migration in the study area has mainly occurred in two stages. The first migration stage occurred in the Middle and Late Jurassic

while the second migration stage occurred at the end of Early Cretaceous

which was a critical period of Mesozoic hydrocarbon migration and accmulation in Xifeng area

Ordos basin. The first and second stages of hydrocarbon migration correspond to the early diagenetic stage B and the late diagenetic stage A

respectively. Since the brine inclusions in the area have mainly been formed in quartz fractures

the preservation conditions of inclusions are relatively poor

leading to a certain interpretation ambiguity of the homogenization temperatures. The screening principle of applying thermometric data of fluid inclusions met in the fractures has

therefore

been made

which can be used as reference for the application of similar inclusions.