轮南、塔河油田稠油油源对比

doi:10.11743/ogg20040106

Abstract

Abstract:

Several technologies, including GC,GC-MS,GC-MS-MS,match experiment and ruthenium ion catalytic oxidation of asphaltenes,are used to study the sources of heavy oil in Lunnan and Tahe oilfields, Tarim basin. The heavy oil in Lunnan and Tahe oilfields contain 25-norhopane, while the distribution of normal paraffin hydrocarbons is complete and chromatographic base lines are uplifted in varying degrees,showing that the accumulations have been formed in two stages. The heavy oil are characterized by high content of tricyclic terpane, low content of C₂₄ tetracyclic terpane, gammacerane, C₂₄ sterane, triaromatic sterane, 4-methyl cholestane-24-ethyl cholestane, aromized sterane,and 24-norsterane. Oil and source rock correlation indicates that the oil in Lunnan and Tahe oilfields come from the source rocks in Middle and Upper Ordovician. Match experiments show that the oil would have also the characteristics of Cambrian source rock if it is mixed with 25% of TD2well's oil generated from Cambrian source rock,indicating that the hydrocarbons generated from Cambrian source rocks have not extensively migrated into Lunan and Tahe reservoirs. Ruthenium ion catalytic oxidation of asphaltenes further verifies that the source rocks in Middle and Upper Ordovician are the main source rocks of heavy oil in Lunnan and Tahe oilfields.

Key words: biomarker, oil and source correlation, heavy oil, ruthenium ion catalytic oxidation(RICO), asphaltenes, Tarim basin

CLC Number:

TE122.1

Ma Anlai, Zhang Shuichang, Zhang Dajiang, Jin Zhijun. Oil and source correlation in Lunnan and Tahe heavy oil fields[J]. Oil & Gas Geology, 2004, 25(1): 31-38.

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Oil and source correlation in Lunnan and Tahe heavy oil fields

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