Oil and Source Rock Correlation in Mabei Area in Northern Margin of Qaidam Basin

Abstract

Abstract: Two kinds of crude oils occur in the different structures in Mabei area in northern margin of Qaidam basin. One is the oil broadly distributed in this area, including Mabei-1 Well, Mabei-101 Well, Mabei-3 Well and late filled oil in Mabei-2 Well. Such oils mainly originated from the source rocks of Middle Jurassic with distinction of maturity. The oil from shallow layer in Mabei-1 Well and Mabei-3 Well originated from Gaqiu sag, belonging to matured oil; while the oil from deep layer in Mabei-1 Well and Mabei-101 Well originated from Saishiteng sag, being highly matured oil. The other, biodegraded oil, was found in Mabei-2 Well, originating from transitional facies source rocks of Carboniferous in this area.

Key words: Qaidam basin, source rock, biomarker, oil and source rock correlation

CLC Number:

TE112.114

PENG Li-cai, PENG Xiao-qun, WANG Li-qun. Oil and Source Rock Correlation in Mabei Area in Northern Margin of Qaidam Basin[J]. Xinjiang Petroleum Geology, 2006, 27(5): 526-529.

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Oil and Source Rock Correlation in Mabei Area in Northern Margin of Qaidam Basin

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