&nbsp;珠江口盆地番禺低隆起&mdash;白云凹陷北坡干酪根热演化模拟与生烃

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珠江口盆地番禺低隆起—白云凹陷北坡干酪根热演化模拟与生烃

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中图分类号: P593

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文章访问数: 2388
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Hydrocarbon Geochemistry from Kerogen Pyrolysis in Panyu Low Massif and North Slope of Baiyun Sag in Pearl River Mouth Basin

摘要

摘要: 通过密封金管—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24.1 MPa压力、20℃/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(C15)和液态烃(C614和C14+)的产率，以及沥青质和残余有机质碳同位素组成。同时与Green River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15)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13C残余和δ13C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。
- 珠江口盆地 /
- /
- 干酪根 /
- /
- 热模拟 /
- /
- 热演化成熟度 /
- /
- 碳同位素组成
Abstract: 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 employed as well. The yields of C15, C614 and C14+ 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 pyrolysis, and the yield of gaseous hydrocarbons is 1.5 times to liquid hydrocarbons. In contrast, the total yields of hydrocarbons from GR and WF kerogen pyrolysis are apparently great, and are dominated by liquid hydrocarbons. This indicates 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 hydrocarbons is mainly affected by thermal maturation. The carbon isotopic compositions of residual kerogens and alsphalt fraction are almost identical, and less than 0.3‰ 13C enrichment to original value of kerogen is observed from 0.7% to 2.7% Ro during thermal maturation. This suggests that δ13C of residual kerogens or alsphaltane could be used as a indicator to the reconstruction of organic matter type for highmature source rock.
- Pearl River Mouth Basin /
- kerogen /
- thermal simulation /
- EASY Ro(%) /
- carbon isotopic composition /

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[1]	郭成波, 李美俊, 刘晓强, 韩秋雅. 干酪根热解生烃分子模拟研究进展 . 沉积学报, 2024, 42(5): 1494-1511. doi: 10.14027/j.issn.1000-0550.2023.045
[2]	舒梁锋, 张向涛, 张忠涛, 张丽丽, 雷胜兰, 高中亮, 韩霄, 于飒. 珠江口盆地白云南洼珠海组陆架边缘三角洲沉积体系演化 . 沉积学报, 2022, 40(3): 825-837. doi: 10.14027/j.issn.1000-0550.2021.146
[3]	侯孝欢, 吴应琴, 王作栋, 刘艳红. 绿河页岩干酪根分步瞬时热解演化特征及机理研究 . 沉积学报, 2018, 36(3): 630-638. doi: 10.14027/j.issn.1000-0550.2018.083
[4]	王永凤, 李冬, 王英民, 徐强. 珠江口盆地重要不整合界面与珠江沉积体系演化分析 . 沉积学报, 2015, 33(3): 587-594. doi: 10.14027/j.cnki.cjxb.2015.03.017
[5]	雷天柱. 有机酸盐热模拟产物中芳烃馏分特征及其地质意义 . 沉积学报, 2010, 28(6): 1250-1253.
[6]	王涌泉. 干酪根化学降解产物的碳同位素组成研究 . 沉积学报, 2007, 25(5): 778-781.
[7]	. 塔里木盆地深层烃源岩可溶有机组分的碳同位素组成特征 . 沉积学报, 2006, 24(05): 769-773.
[8]	张学军, 严晓虎, 李佩珍, 苗得玉, 胡文, 刘庆. 干酪根中类脂肪链含量的测定及石油地质意义 . 沉积学报, 2004, 22(4): 711-717.
[9]	段毅, 彭德华, 张晓宝, 周世新, 王智平, 张辉. 柴达木盆地原油碳同位素组成的主控因素与成因类型 . 沉积学报, 2003, 21(2): 355-359.
[10]	高岗, 刚文哲, 郝石生. 奥陶系未成熟藻干酪根水解下动力学参数的计算 . 沉积学报, 1998, 16(4): 140-144.
[11]	周世新, 夏燕青, 罗斌杰, 程学惠, 崔明中, 李原, 王春江. 脂肪酸盐生烃热模拟研究及其意义 . 沉积学报, 1997, 15(2): 118-121.
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[13]	王万春. 天然气、原油、干酪根的氢同位素地球化学特征 . 沉积学报, 1996, 14(S1): 131-135.
[14]	夏燕青, 罗斌杰, 王春江. 南宁盆地第三系木质褐煤中三萜类化合物的热模拟研究 . 沉积学报, 1996, 14(S1): 100-106.
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[16]	夏燕青, 罗斌杰. 二环倍半萜烷生成演化的热模拟 . 沉积学报, 1994, 12(3): 106-113.
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[20]	秦匡宗, 吴肖令. 高磁场固态碳13核磁共振法研究干酪根的热降解成烃机理 . 沉积学报, 1990, 8(1): 19-27.

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文章访问数: 2388
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珠江口盆地番禺低隆起—白云凹陷北坡干酪根热演化模拟与生烃

刊出日期: 2013-02-10

中图分类号: P593

关键词:

珠江口盆地 /

干酪根 /

热模拟 /

热演化成熟度 /

碳同位素组成

摘要: 通过密封金管—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24.1 MPa压力、20℃/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(C15)和液态烃(C614和C14+)的产率，以及沥青质和残余有机质碳同位素组成。同时与Green River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15)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13C残余和δ13C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。

Hydrocarbon Geochemistry from Kerogen Pyrolysis in Panyu Low Massif and North Slope of Baiyun Sag in Pearl River Mouth Basin

Publish Date: 2013-02-10

Keywords:

Abstract: 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 employed as well. The yields of C15, C614 and C14+ 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 pyrolysis, and the yield of gaseous hydrocarbons is 1.5 times to liquid hydrocarbons. In contrast, the total yields of hydrocarbons from GR and WF kerogen pyrolysis are apparently great, and are dominated by liquid hydrocarbons. This indicates 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 hydrocarbons is mainly affected by thermal maturation. The carbon isotopic compositions of residual kerogens and alsphalt fraction are almost identical, and less than 0.3‰ 13C enrichment to original value of kerogen is observed from 0.7% to 2.7% Ro during thermal maturation. This suggests that δ13C of residual kerogens or alsphaltane could be used as a indicator to the reconstruction of organic matter type for highmature source rock.

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珠江口盆地番禺低隆起—白云凹陷北坡干酪根热演化模拟与生烃

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Hydrocarbon Geochemistry from Kerogen Pyrolysis in Panyu Low Massif and North Slope of Baiyun Sag in Pearl River Mouth Basin

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珠江口盆地番禺低隆起—白云凹陷北坡干酪根热演化模拟与生烃

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Hydrocarbon Geochemistry from Kerogen Pyrolysis in Panyu Low Massif and North Slope of Baiyun Sag in Pearl River Mouth Basin

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珠江口盆地番禺低隆起—白云凹陷北坡干酪根热演化模拟与生烃

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Hydrocarbon Geochemistry from Kerogen Pyrolysis in Panyu Low Massif and North Slope of Baiyun Sag in Pearl River Mouth Basin

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出版历程

目录

珠江口盆地番禺低隆起—白云凹陷北坡干酪根热演化模拟与生烃

English Abstract

Hydrocarbon Geochemistry from Kerogen Pyrolysis in Panyu Low Massif and North Slope of Baiyun Sag in Pearl River Mouth Basin

全文HTML

目录

友情链接

期刊在线

联系我们