This work was supported by the National Natural Science Foundation of China (Grant No. 40172056);the Research Found for the Doctoral Program of High Education (RFDP No. 2000042506);the Geological Research Institute, Dagang Oilfield (Group) Co. Ltd.
With wax content of 1.62%, heavy oil has been produced from the sandstone reservoirs of Neogene Guantao Formation (Ng1m). In the GC and GC-MS RIC profiles of its aliphatic fraction, n-alkanes are totally lost, which s...