中文摘要：

通过密封金管一高压釜体系对珠江口盆地番禺低隆起-白云凹陷北坡恩平组炭质泥岩的干酪根（PY），在24．1MPa压力、200C／hr（373．5～526℃）和2℃／h（343～489．2℃）两个升温速率条件下进行热模拟生烃实验，分析气态烃（C1-5）和液态烃（C6-14和C14＋）的产率，以及沥青质和残余有机质碳同位素组成。同时与GreenRiver页岩（GR）和Woodford泥岩（wF）的干酪根，分别代表典型的Ⅰ型和Ⅱ型干酪根进行对比研究。结果显示PY热演化产物中总油气量明显低于GR和wF干酪根，且气态烃（C。）最高产率是液态烃的1．5倍，揭示恩平组炭质泥岩主要以形成气态烃为主。在热演化过程中，有机质成熟度和母质类型是控制油气比的主要因素，气态烃和轻烃的产率比值主要受热演化成熟度的影响。干酪根残余有机质碳同位素和沥青质碳同位素在热演化过程中受有机质成熟度的影响较小，δ^13C残余和δ^13C沥青质可以间接反映原始母质的特征，为高演化烃源岩油气生成提供依据。

英文摘要：

A series of kerogen pyrolysis in gold tube reactors were conducted at two heating rates of 20 ℃/h （from 373.5 to 526 ℃ ） and 2 ℃/h （from 343 to 489.2 ℃ ） under a constant pressure of 24.1 MPa. The kerogen （PY） concentrated from Enping Formations immature carboniferous mudstone in the Panyu Low Massif and North Slope of Baiyun Sag in Pearl River Mouth Basin, China was used in this study. For comparison purpose, the isolated kerogens from Green River shale （GR） and Woodford mudstone （WF） representing typical type I and II kerogens were em- ployed as well. The yields of C1_5, C6.14 and C14＋ were quantified, and the carbon isotopic compositions of residual kerogens and asphalts were measured. The results show the total yield of hydrocarbons are low from PY kerogen pyrol- ysis, and the yield of gaseous hydrocarbons is 1.5 times to liquid hydrocarbons. In contrast, the total yields of hydro- carbons from GR and WF kerogen pyrolysis are apparently great, and are dominated by liquid hydrocarbons. This in- dicates PY kerogen thermal decomposition mainly forms natural gas. During kerogen thermal decomposition, the oil to gas ratio is controlled by both of organic matter thermal maturity and kerogentypes, yet the ratio of gas and light hydro- carbons is mainly affected by thermal maturation. The carbon isotopic compositions of residual kerogens and alsphalt fraction are almost identical, and less than 0.3%c ^13C enrichment to original value of kerogen is observed from 0.7% to 2.7% Ro during thermal maturation. This suggests that δ^13C of residual kerogens or alsphaltane could be used as a indicator to the reconstruction of organic matter type for high-mature source rock.