Relationship between the fluorescence color of oil inclusions and thermal maturity in the Dongying Depression, Bohai Bay Basin, China: Part 1. Fluorescence evolution of oil in the context of hydrous pyrolysis experiments with increasing maturity
Relationship between the fluorescence color of oil inclusions and thermal maturity in the Dongying Depression, Bohai Bay Basin, China: Part 1. Fluorescence evolution of oil in the context of hydrous pyrolysis experiments with increasing maturity
复制标题
渤海湾盆地东营凹陷石油包裹体荧光颜色与热成熟度的关系：第1部分：含水热解实验背景下石油荧光随成熟度的演化
DOI：
10.1016/j.marpetgeo.2018.10.053
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发表时间：
2019-02
影响因子：
4.2
通讯作者：
Shouzhi Hu
中科院分区：
文献类型：
--
作者：
Hongwei Ping;Honghan Chen;Simon C. George;Chunquan Li;Shouzhi Hu
以渤海湾盆地东营凹陷的4种生油岩（Ⅰ型和Ⅱ型干酪根）为研究对象，采用半封闭系统模拟生排烃过程，测定了原油的荧光演化特征。结果表明，驱油的荧光特征与生油干酪根类型无关，而与生排油过程密切相关，生排油过程受烃源岩热成熟度控制。驱油的荧光光谱参数（λmax、Q650/500和QF-535）随驱油过程的变化不明显，甚至在沥青生成高峰期出现最大λ max时出现逐渐红移。荧光颜色的蓝移仅发生在紧接在沥青生成高峰期之后的主生排油阶段。但驱油主要表现为绿色至黄色荧光（500 nm <λmax< 590 nm），实验结果表明，在开放或半封闭源岩体系中直接生成的原油中，不可能捕获到蓝色荧光油包裹体。研究表明，只有当烃源岩处于主要生排油阶段时，油包裹体荧光颜色与热成熟度的关系才成立，此时烃源岩应具有一致的排油特征。在这种情况下，绿色荧光油包裹体（500 nm <λmax< 550 nm）的热成熟度普遍高于黄色荧光油包裹体（580 nm <λmax< 590 nm）。另外，排烃过程可能使油包裹体荧光颜色与热成熟度的关系复杂化，具有黄色荧光的油包裹体不一定具有低的热成熟度。我们的实验已经建立了第一个边界条件的荧光行为的石油作为热成熟度的函数，承认石油的成分变化也发生在迁移过程中，因此在油藏中的圈闭。
The fluorescence evolution of oils has been measured by simulation of petroleum generation and expulsion in a half-closed system using hydrous pyrolysis based on four oil-prone source rocks (Type I and II kerogens) from the Dongying Depression, Bohai Bay Basin, China. The results suggest that the fluorescence characteristics of expelled oil are independent of oil-prone kerogen types, but are strongly related to oil generation and expulsion processes which are controlled by thermal maturity of source rocks. The fluorescence spectral parameters (λmax, Q650/500and QF-535) of expelled oils show no obvious variation, or even show gradual redshifts when the highestλmaxoccurs at peak bitumen generation, depending on the expulsion process. A blueshift of fluorescence color occurs only during the main oil generation and expulsion stage, which immediately follows the peak bitumen generation stage. However, the expelled oil mainly exhibits green to yellow fluorescence colors (500 nm <λmax< 590 nm), which suggests that it is impossible for blue fluorescent oil inclusions to be trapped from the oil directly generated in an open or half-closed source rock system for oil-prone source rocks based on the experimental results. This study demonstrates that the relationship between the fluorescence color of oil inclusions and thermal maturity for oil-prone source rocks is valid only when the source rocks reach the main oil generation and expulsion stage, where the source rocks should have consistent expulsion characteristics. Under this situation, the green fluorescent oil inclusions (500 nm <λmax< 550 nm) generally have a higher thermal maturity than the oil inclusions with yellow fluorescence (580 nm <λmax< 590 nm). Otherwise, the petroleum expulsion processes may complicate the relationship between the fluorescence color of oil inclusions and thermal maturity, and oil inclusions with yellow fluorescence do not necessarily have a low thermal maturity. Our experiments have established the first boundary conditions for the fluorescence behaviour of oil as a function of thermal maturity, acknowledging that compositional change of the oil is also occurring during migration, and hence before entrapment in reservoirs.
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影响因子：
3
作者：
D. Leythaeuser;R. G. Schaefer
通讯作者：
D. Leythaeuser;R. G. Schaefer
影响因子：
3
作者：
B. Pradier;C. Largeau;S. Derenne;L. Martinez;P. Bertrand;Y. Pouet
通讯作者：
B. Pradier;C. Largeau;S. Derenne;L. Martinez;P. Bertrand;Y. Pouet
影响因子：
3
作者：
Hill, RJ;Tang, YC;Kaplan, IR
通讯作者：
Kaplan, IR
影响因子：
3.5
作者：
R. Riecker
通讯作者：
R. Riecker
影响因子：
4.2
作者：
R. Thiéry;J. Pironon;F. Walgenwitz;F. Montel
通讯作者：
R. Thiéry;J. Pironon;F. Walgenwitz;F. Montel