石油实验地质Issue(2)：230-237,8.DOI:10.11781/sysydz201402230
蓬莱19-3／25-6油田未熟-低熟油特征与成因
Characteristics and genesis of immature and low-matire oils in Penglai 19-3 and 25-6 oilfields
摘要
Abstract
Based on the experimental data of crude oils and source rocks, the characteristics, sources and generation conditions of immature and low-mature oils from the Penglai 19-3/25-6 oilfields were analyzed systematically, and the main generation mechanisms were also discussed. The immature and low-mature oils from the Penglai 19-3/25-6 oil-fields were buried in shallow formations, and were featured by high density, high viscosity, low content of saturated hydrocarbon, low saturated/aromatic ratio, high content of non-hydrocarbon, high non-hydrocarbon/asphalt ratio, low Pr/Ph ratio, low abundance of rearranged sterane and Ts<Tm. The correlations of oils and sources showed that these immature and low-mature oils came from the immature and low-mature source rocks in the first-second and third members of the Shahejie Formation in the Penglai 19-3/25-6 oilfields and their neighboring areas. Strong anoxic semi-saline/saline environments, high organic matter abundance and oil-prone type kerogen, alga as main hydrocarbon-generating material, and bacterium in organic matter were the favorable geologic conditions for the generation of immature and low-mature oils from the above-mentioned 2 sets of source rocks. The main generation mechanism included the early-stage hydrocarbon generations of organic matter in algae, organic matter reformed by bacterium, and carbonate catalysis at low temperature. A large amount of immature and low-mature oils which generated under the joint action of the mechanisms was contributive for the formation of the Penglai 19-3/25-6 oilfields.关键词
未熟-低熟油/生标化合物/成因机理/蓬莱19-3油田/蓬莱25-6油田Key words
immature and low-mature oils/biomarker/generation mechanism/Penglai 19-3 oilfield/Penglai 25-6 oilfield分类
能源科技引用本文复制引用
王广源,周心怀,王昕,王应斌,郭永华,刘廷海..蓬莱19-3／25-6油田未熟-低熟油特征与成因[J].石油实验地质,2014,(2):230-237,8.基金项目
国家科技重大专项（2011ZX05023-006-002）资助。 （）
