储层烃类包裹体类型识别与PVT模拟方法
Identification of Hydrocarbon Inclusion Types and PVT Simulation Methods
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摘要: 正确判识烃类包裹体的类型与准确的PVT模拟结果对于含油气盆地储层包裹体研究和应用有着重要的意义。目前有关烃类包裹体类型的分析方法有显微冷冻测温分析、荧光光谱分析、显微激光拉曼光谱分析及傅里叶变换红外光谱分析等方法。显微测温分析是研究包裹体相变特征的基本方法,也是判断烃类包裹体含油类型的简单而有力的工具。根据烃类包裹体的相变特征结合光谱分析结果可以识别不同类型的油气,如重质油、轻质油、湿气、干气和凝析气等。根据其临界点的高低也可以判断其含油类型。在对烃类包裹体判识的基础上,对包裹体进行PVT模拟是准确获取油气成藏温压条件的重要手段,但PVT模拟的难点是难以获取单个烃类包裹体的成分,这将是未来烃类包裹体研究的重要内容之一。Abstract: Correct identification of hydrocarbon inclusion types and accurate PVT simulation are of great importance to research and application of petroleum inclusions in reservoir basins. At present, the methods for hydrocarbon inclusion analysis include congeal phase transition analysis, fluorescence spectroscopy, micro-laser Raman spectroscopy, Fourier transform infrared spectroscopy and so on. Micro-thermometry is the basic method to examine phase transition of fluid inclusions and is a simple and powerful tool of indentifying the types of oil-bearing hydrocarbon inclusions. By combining phase transition characteristics of hydrocarbon inclusions with the results of spectral analysis, different types of oils and gases, such as heavy oil, light oil, wet gas, dry gas and condensate gas can be identified. Critical points can also be used for determining the oil types. Based on the identification of hydrocarbon inclusions, PVT simulation of fluid inclusions is an important means to obtain accurate temperature and pressure of hydrocarbon accumulation. However, it is difficult to obtain the composition of a single hydrocarbon inclusion by PVT simulation, which will be one of the important aspects in research on hydrocarbon inclusions in the future.
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Keywords:
- hydrocarbon /
- inclusion /
- type /
- of
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