济阳坳陷东营凹陷南斜坡高蜡原油高分子量烃类分布及高蜡成因

doi:10.11743/ogg20080311

Abstract

Abstract:

A study of the components,distribution and unconventional biomarkers of high molecular hydrocarbons in high wax content oils from the south slope zone of Dongying sag was carried out by using high temperature gas chromatography and dual mass spectrometry.The results suggest that the high wax content oil in the Ordovician well Wanggu-1 share the same source with that in the Kongidan Formation,yet its maturity is higher than that of the latter.GC-MS-MS analysis indicates that the high wax content oils in the study area are rich in C₂₆,24-norcholeatane,which distinguishes them from the normal oils originated from the Upper Es⁴ and proves that the high wax content oils might come from alginite.Apart from terrestrial organic matters,hydrobionts of lower rank are also important original source materials of high wax content oils.Other important factors for the generation of the high wax content oils include microbial action.The relatively high maturity has certain influences on wax content within certain maturation ranges.

Key words: high molecular weight hydrocarbon, high temperature gas chromatography, dual mass spectrometry, high wax content oil, oil and gas origin, Dongying Sag, Jiyang Depression

CLC Number:

TE122.1

L? Hui, Chen Zhilin, Wang Zhong, Tang Hongsan. Distribution of high molecular weight hydrocarbons and genesis of high wax content oil from the south slope zone of the Dongying Sag,the Jiyang Depression[J]. Oil & Gas Geology, 2008, 29(3): 355-360.

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Distribution of high molecular weight hydrocarbons and genesis of high wax content oil from the south slope zone of the Dongying Sag,the Jiyang Depression

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