Effects of oil cracking on fluorescence color, homogenization temperature and trapping pressure reconstruction of oil inclusions from deeply buried reservoirs in the northern Dongying Depression, Bohai Bay Basin, China

The effects of oil cracking on fluorescence color, homogenization temperature (Tho) and trapping pressure (Pt) of oil inclusions from deeply buried reservoirs (DBRs) (3672–4359 m) in the northern Dongying Depression were determined based on fluorescence spectroscopy and homogenization temperatures of oil inclusions, kinetic modeling of crude oil cracking, and petroleum inclusion thermodynamics modeling. The modeling results demonstrate that fluorescence color, Tho and predicted Pt have strong relationships with the transformation rate via cracking of oil to gas (Tr), and the formation temperature (Tf) that the inclusions experienced. The fluorescence color is hardly influenced at all during the initial stages of oil cracking (Tr