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Forty-eight crude oil samples collected from different reservoirs in the Tahe oilfield of the Tarim Basin were investigated. Based on geochemical characteristics, it is concluded that the oil samples originated from multiple marine source rocks deposited in various sedimentary environments and subsequently altered by different levels of thermal maturation. These mixtures were de-convoluted to three...
A suite of oils and condensates from Cambrian-Ordovician sources in the cratonic region of the Tarim Basin, NW China has been characterized by gas chromatography–mass spectrometry with a focus on factors affecting the extended tricyclic terpane ratio [ETR=(C28+C29)TT/Ts]. These oils and condensates show ETR values ranging from 0.3 to 12.4, suggesting variable source contributions deposited under different...
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