Biomarker characteristics 0f source rock and bitumen and oil—source correlation of paleo—reservoir in northeastern Sichuan
Online published: 2013-10-08
Northeastern Sichuan is an important gas producing area of China，and its primary origin of gas is the cracking of crude oil of paleo-reservoir．On account of the uncertainty of oil sources of paleo—reservoir．the biomarker of reservoir bitumen of Changxing-Jialingjiang Formation and source rocks of Paleozonic and Mesozoic in northeastern Sichuan was analyzed and contrasted．The result shows that the organic matter of Lower Paleozonic source rocks was derived from hydrobios and algae；the organic matter of Upper Paleozonic source rocks was derived from a mixing source in which hydrobios and algae prevail over higher plants；the organic matter of Upper Paleozonic source rocks was dominated by higher plants．Paleozonic source rocks deposited in reducing to weakly reducing transitional environment with saline water and Mesozoic source rocks deposited in weakly reducing to weakly oxic transitional environment with flesh water． The main oil source formation of paleo—reservoir in Changxin Jialin iang Form~ion is Upper Permian Longtan Formation，
XIONG Di , DING Xiaoqi , ZHU Zhiliang , LE Jinpeng . Biomarker characteristics 0f source rock and bitumen and oil—source correlation of paleo—reservoir in northeastern Sichuan[J]. Lithologic Reservoirs, 2013 , 25(4) : 54 -62 . DOI: 10.3969/j.issn.1673-8926.2013.04.011
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