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本文从油气基本性质、类型、成熟度、油气源分析以及煤，岩生烃、排烃机理等方面，以详尽的资料论证了目前在台北凹陷（不包括胜金口油田）所发现的油气是煤成烃，并得出如下结论：①该区的原油具有陆相原油的典型特征，从物性和成因上可以分为三类；②该区的煤成气以甲烷碳同位素偏轻、重烃气体碳同位素偏重为特征；③该区的原油和天然气成熟度低，来源于中、下侏罗统煤系源岩（主要是煤）；④该区能形成工业性煤成油气流与该区煤岩富氢组分含量高并具早期生、排烃等特点，以及良好的生储盖条件有关。
In this paper, from the aspects of the basic properties of oil and gas, types, maturity, oil and gas source analysis and coal, rock hydrocarbon generation and expulsion mechanism, with the detailed data, the paper demonstrates that the hydrocarbon oil currently found in the Taibei Sag (excluding Shengjinkou Oilfield) And concluded as follows: ① The crude oil in this area has the typical characteristics of continental oil, which can be divided into three categories according to their physical properties and genesis. ② The coal-forming gas in this area is lighter in methane carbon isotope, heavy hydrocarbon gas Carbon isotope; (3) the crude oil and natural gas in this area have low maturity, which is derived from the middle and lower Jurassic coal series source rocks (mainly coal); (4) the area can form industrial coal into oil and gas flow and the coal Hydrogen-rich rock components with high content of early generation, hydrocarbon expulsion and other characteristics, as well as good conditions of the reservoir and cover.