关于抑制维特里尼特反射的研究:一种热模拟实验
Hui Zhang1,2,3, Weibo Zhao1,3, Huaichang Wang1,3
1Institute of Exploration, Development and Research, PetroChina Company Limited Changqing, Oilfield Branch, Xi'an 710018, China.
ACS omega
|October 14, 2024
概括
在热演变过程中,碳化合物生成和过压抑制了维特里尼特反射率 (R0). 这项研究显示,碳化合物浸和孔隙网络保留挥发物会导致源岩中的异常R0值.
科学领域:
- 地质化学 地质化学
- 有机石矿学 有机石矿学
- 沉积盆地分析 沉积盆地分析
背景情况:
- 维特里尼特反射率 (R0) 对于重建热史和评估源岩成熟度至关重要.
- 报告的R0抑制可能会损害热演变评估的准确性.
研究的目的:
- 调查碳化合物生成对热进化过程中的玻璃石反射率的影响.
- 在封闭系统中阐明R0抑制背后的机制.
主要方法:
- 在封闭系统中进行受控的热模拟实验.
- 在不同的热条件和煤化物类型下对玻璃石反射率的分析.
主要成果:
- 碳化合物吸收和过压被确定为抑制维特里尼特反射的关键因素.
- 对于0.6%至2.1%之间的R0值,主要原因是I型煤化物对telokollinite纹理的碳化合物浸.
- 在2.1%R0以上,超压成为异常反射率的主导因素.
结论:
- 碳化合物生成显著影响维特里尼特反射率,导致抑制.
- 抑制的机制随R0值而变化,涉及碳化合物浸和过压.
- 封闭系统条件,保留挥发性产品,阻碍玻璃石结构重组,并导致反射抑制.
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