鄂尔多斯盆地东北部上古生界煤系烃源岩17&alpha;(H)-重排藿烷类的分布及成因探讨

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鄂尔多斯盆地东北部上古生界煤系烃源岩17α(H)-重排藿烷类的分布及成因探讨

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中图分类号: P618.130.1

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Origin of 17α (H)-Rearranged Hopanes in Upper Palaeozoic Coal Bearing Source Rocks in Northeast Ordos Basin

摘要

摘要: 鄂尔多斯盆地东北部上古生界10个典型煤系烃源岩样品中检测出三类重排藿烷，分别为17α(H)-重排藿烷、18α(H)-新藿烷以及未知结构的早洗脱重排藿烷。烃源岩样品中藿烷类具有两种分布型式：①以C₃₀藿烷为主峰的C₂₇~C₃₅(缺C₂₈)藿烷类常规分布型式，含少量17α (H)-重排藿烷和18α(H)-新藿烷；②以富含17α(H)-重排藿烷和C₃₀早洗脱重排藿烷为特征。含有高~异常高相对丰度17α(H)-重排藿烷的烃源岩样品，其17α(H)-重排藿烷的绝对浓度也明显较高。从烃源岩生源构成、有机质丰度及其赋存状态、成熟度以及沉积与成岩环境4个方面探讨了高丰度17α(H)-重排藿烷的成因。研究结果表明，烃源岩中高丰度的17α(H)-重排藿烷的形成与高等植物生源有一定联系、亚氧化—氧化的扇缘泥炭沼泽相是形成高~异常高丰度17α(H)-重排藿烷的有利沉积相带；而烃源岩显微组分、有机质丰度及其赋存状态以及有机质成熟度的影响尚不确定。
- 鄂尔多斯盆地 /
- 煤系烃源岩 /
- 17&alpha /
- (H)-重排藿烷 /
- 生源构成 /
- 沉积环境
Abstract: Geochemical characteristics of saturated hydrocarbons have been discussed on the basis of GC/MS analysis for the 10 typical coal-bearing source rock samples in northeast Ordos Basin. Three series of rearranged hopanes, 17α (H)-diahopanes, 18α (H)-neohopanes and unidentified earlyeluting rearranged hopanes, were detected. The analytical results showed that the hopane series compounds have two different distribution patterns. One is conventional pattern, which has high abundance of regular hopanes, low abundance of 17α (H)-diahopanes and 18α (H)-neohopanes, represented by source rock samples from Yu 20 and Shuang 1 well. The other one is unconventional model, characterized by abnormally rich in 17α (H)-diahopanes and a C₃₀-early-eluting rearranged hopane, represented by source rock samples from Su 27 well. The source rocks from Su 27 well high relative abundance of 17α (H)-diahopanes and also high absolute concentration. The main controlling factors of extremely abundant 17α (H)-diahopanes are discussed from the composition of organic materials, maceral, the abundance of organic matters and its occurrence, maturity, depositional and diagenetic environment. The result shows that the origin and accumulation of high abundance of 17α (H)-diahopanes in source rocks has a close relationship with higher plants source materials. Weak oxidation to oxidation fan marginal peat bog facies is a favorable sedimentary facies for forming a significant proportion of 17α (H)-diahopanes. However, the influences of maceral, maturity, the abundance of organic matters and its occurrence are not sure.
- Ordos Basin /
- coal-bearing source rocks /
- 17&alpha /
- (H)-diahopane /
- composition of organic materials /
- depositional environment

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[2]	宋慧波, 张彬, 于振锋, 金毅, 胡斌, 牛永斌, 张立军. 鄂尔多斯盆地东缘太原组风暴沉积特征及环境模式 . 沉积学报, 2024, 42(4): 1370-1383. doi: 10.14027/j.issn.1000-0550.2023.020
[3]	张文俊, 林舒敏, 柯行, 张敏. 煤系烃源岩中四种类型高丰度重排藿烷组成特征及成因探讨-以鄂尔多斯盆地上古生界为例 . 沉积学报, 2024, (): -. doi: 10.14027/j.issn.1000-0550.2024.028
[4]	林舒敏, 张敏, 李洪波. 鄂尔多斯盆地上古生界煤系烃源岩三环萜烷成因探讨 . 沉积学报, 2024, 42(4): 1433-1446. doi: 10.14027/j.issn.1000-0550.2023.139
[5]	林舒敏, 张敏, 李洪波. 鄂尔多斯盆地上古生界煤系烃源岩三环萜烷成因探讨 . 沉积学报, 2024, (): -.
[6]	张云望, 金鑫, 乔培军, 李滨兵, 洪彦哲, 陈俞超, 芦刚, 杜怡星, 时志强. 鄂尔多斯盆地东北部下侏罗统富县组沉积物源分析 . 沉积学报, 2023, 41(5): 1414-1429. doi: 10.14027/j.issn.1000-0550.2022.154
[7]	张治波, 徐颖, 苗艳菊, 王文锋, 赵迪斐, 陈丹玲. 昌都盆地古近系贡觉组物源及其沉积环境 . 沉积学报, 2022, 40(6): 1561-1581. doi: 10.14027/j.issn.1000-0550.2022.094
[8]	郭沫贞, 吕福亮, 邵大力, 侯福斗, 杨涛涛, 李东. 东爪哇盆地抱球虫灰岩遗迹化石及其沉积环境分析 . 沉积学报, 2021, 39(3): 713-722. doi: 10.14027/j.issn.1000-0550.2020.028
[9]	袁灵聪, 朱晓军, 蔡进功, 钟锴. 东海盆地长江坳陷美人峰组烃源岩沉积环境与生烃潜力评价 . 沉积学报, 2021, 39(2): 506-514. doi: 10.14027/j.issn.1000-0550.2020.016
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[12]	贾浪波, 钟大康, 孙海涛, 严锐涛, 张春林, 莫午零, 邱存, 董媛, 李兵, 廖广新. 鄂尔多斯盆地本溪组沉积物物源探讨及其构造意义 . 沉积学报, 2019, 37(5): 1087-1103. doi: 10.14027/j.issn.1000-0550.2019.014
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鄂尔多斯盆地东北部上古生界煤系烃源岩17α(H)-重排藿烷类的分布及成因探讨

刊出日期: 2014-08-10

中图分类号: P618.130.1

关键词:

17&alpha /

摘要: 鄂尔多斯盆地东北部上古生界10个典型煤系烃源岩样品中检测出三类重排藿烷，分别为17α(H)-重排藿烷、18α(H)-新藿烷以及未知结构的早洗脱重排藿烷。烃源岩样品中藿烷类具有两种分布型式：①以C₃₀藿烷为主峰的C₂₇~C₃₅(缺C₂₈)藿烷类常规分布型式，含少量17α (H)-重排藿烷和18α(H)-新藿烷；②以富含17α(H)-重排藿烷和C₃₀早洗脱重排藿烷为特征。含有高~异常高相对丰度17α(H)-重排藿烷的烃源岩样品，其17α(H)-重排藿烷的绝对浓度也明显较高。从烃源岩生源构成、有机质丰度及其赋存状态、成熟度以及沉积与成岩环境4个方面探讨了高丰度17α(H)-重排藿烷的成因。研究结果表明，烃源岩中高丰度的17α(H)-重排藿烷的形成与高等植物生源有一定联系、亚氧化—氧化的扇缘泥炭沼泽相是形成高~异常高丰度17α(H)-重排藿烷的有利沉积相带；而烃源岩显微组分、有机质丰度及其赋存状态以及有机质成熟度的影响尚不确定。

Origin of 17α (H)-Rearranged Hopanes in Upper Palaeozoic Coal Bearing Source Rocks in Northeast Ordos Basin

Publish Date: 2014-08-10

Keywords:

Abstract: Geochemical characteristics of saturated hydrocarbons have been discussed on the basis of GC/MS analysis for the 10 typical coal-bearing source rock samples in northeast Ordos Basin. Three series of rearranged hopanes, 17α (H)-diahopanes, 18α (H)-neohopanes and unidentified earlyeluting rearranged hopanes, were detected. The analytical results showed that the hopane series compounds have two different distribution patterns. One is conventional pattern, which has high abundance of regular hopanes, low abundance of 17α (H)-diahopanes and 18α (H)-neohopanes, represented by source rock samples from Yu 20 and Shuang 1 well. The other one is unconventional model, characterized by abnormally rich in 17α (H)-diahopanes and a C₃₀-early-eluting rearranged hopane, represented by source rock samples from Su 27 well. The source rocks from Su 27 well high relative abundance of 17α (H)-diahopanes and also high absolute concentration. The main controlling factors of extremely abundant 17α (H)-diahopanes are discussed from the composition of organic materials, maceral, the abundance of organic matters and its occurrence, maturity, depositional and diagenetic environment. The result shows that the origin and accumulation of high abundance of 17α (H)-diahopanes in source rocks has a close relationship with higher plants source materials. Weak oxidation to oxidation fan marginal peat bog facies is a favorable sedimentary facies for forming a significant proportion of 17α (H)-diahopanes. However, the influences of maceral, maturity, the abundance of organic matters and its occurrence are not sure.

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鄂尔多斯盆地东北部上古生界煤系烃源岩17α(H)-重排藿烷类的分布及成因探讨

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Origin of 17α (H)-Rearranged Hopanes in Upper Palaeozoic Coal Bearing Source Rocks in Northeast Ordos Basin

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鄂尔多斯盆地东北部上古生界煤系烃源岩17α(H)-重排藿烷类的分布及成因探讨

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Origin of 17α (H)-Rearranged Hopanes in Upper Palaeozoic Coal Bearing Source Rocks in Northeast Ordos Basin

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鄂尔多斯盆地东北部上古生界煤系烃源岩17α(H)-重排藿烷类的分布及成因探讨

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Origin of 17α (H)-Rearranged Hopanes in Upper Palaeozoic Coal Bearing Source Rocks in Northeast Ordos Basin

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出版历程

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鄂尔多斯盆地东北部上古生界煤系烃源岩17α(H)-重排藿烷类的分布及成因探讨

English Abstract

Origin of 17α (H)-Rearranged Hopanes in Upper Palaeozoic Coal Bearing Source Rocks in Northeast Ordos Basin

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