Oil-source rock correlation for paleo-oil reservoir in the Puguang gas field, northeast Sichuan Basin, southwest China

摘要

The characteristic of biomarker, stable carbon isotope, and rare earth elements in solid bitumen from the Puguang gas field and organic fraction in source rocks from the same area were investigated. Results show that the solid bitumen was derived from a mixed organic source with greater contributions from marine materials deposited under reducing environments. The enrichment of light rare earth elements seemed related to marine organic matter input. According to the results of principal component analysis, the main source rocks of paleo-oil reservoir in the Puguang gas field were the Upper Permian source rocks.