FLUID INCLUSION STUDIES AND OIL CHARGE HISTORY RECONSTRUCTION OF JURASSIC FORMATIONS, FULING AREA, SICHUAN BASIN, CHINA

摘要

Fluid inclusion analysis was carried out to investigate the hydrocarbon charge history of the J1zD reservoir in Fuling area, Sichuan Basin. Two groups of inclusions can be discriminated: one with yellow fluorescence color, the other with whiteblue. Microthermometric results, combined with the burial history and geothermal data, indicate there had been two charges in the J1zD reservoirs. The first charge took place about 140Ma ago, produced the oil with relatively lower maturity (yellow fluorescing) but high temperature (105-120°C, 110- 120°C); the oil charged at later stage (the second charge, 25Ma ago) was with high maturity (whiteblue fluorescing) at relatively lower temperature (90-100°C, 95-100°C).