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zhong guo zhong you li qing zi yuan de xing cheng yu fen bu
Author(s): 
Pages: 105-112
Year: Issue:  2
Journal: Oil & Gas Geology

Keyword:  物?';
Abstract: Heavy oil in China is characterized by terrestrial genesis:low content of sulfur,traceelements and saturated hydrocarbon. Serious thickening resulted by biodegradation, waterwashing and free oxygen oxidization not only has effect on sterane and terpane compounds,but also on polycyclic aromatic compounds. The order of the effect on the abovementioned compounds is naphthalene series→phenanthrene series→chresene series→triaromatic steroid hydrocarbons. the thickening also causes obvious fractionation of stablecarbon isotopes in crude oil. Heayy oil pools are mainly caused by later tectonic movements. In the rising process of hydrocarbon basins (including faulting and folding),paleopools might be destroyed,originally accumulated oil might migrate laterally or horizontally again. In this case,the oil might be biodesraded, oxidated and waterwashed and finallyform the heavy oil accumulation. The spatial distribution of heavy oil and air sands bearsclose relation to conventional oil.Heavy oil and tar sands are widely distributed in China,and the reserves are abundant.They play an important part in China's oil resources.
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