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石油包裹体显微测温和体积分析已经被广泛应用于重构石油包裹体组分和压力-温度(P-T)捕获条件,然而,其P-T捕获条件准确预测除精确的均一温度(Thoil)和气泡充填度(Fv)测试外,还依赖于石油饱和压力和体积预测能力.基于改进石油流体饱和压力和气、液相摩尔体积预测精度,建立了石油流体C7+组分摩尔含量与其Thoil和室温(20℃)下Fv之间的定量关系.尽管利用该定量关系可以极大地简化石油包裹体热动力学模拟过程,还是不能避免Fv对热动力学模拟精度的影响.因此,根据大量已知组分石油流体建立了甲烷摩尔含量约束的新的石油包裹体捕获压力预测模型.新模型中唯一变量即为石油包裹体甲烷摩尔含量,并且不再依赖于专业的热动力学模拟软件(PVTsim、VTflinc、PIT和FIT-OIL),从而极大地简化了传统石油包裹体捕获压力重构过程.最终,新模型捕获压力预测精度得到评价,石油包裹体甲烷摩尔含量对捕获压力重构具有重要控制作用,单个石油包裹体甲烷含量定量化是未来石油包裹体捕获压力重构的主要研究方向.
The microscopic temperature measurement and volume analysis of petroleum inclusions have been widely used to reconstruct the composition of petroleum inclusions and pressure-temperature (PT) capture conditions. However, their PT capture conditions accurately predict the precise Thoil and bubble (Fv) test, but also depends on the oil saturation pressure and the volume prediction ability.Based on the improvement of the saturation pressure of petroleum oil and the prediction accuracy of gas and liquid phase molar volume, the molar ratio of C7 + component of petroleum fluid to its Thoil and room temperature ) Fv.While using the quantitative relationship can greatly simplify the thermodynamic simulation process of oil inclusions, or can not avoid the impact of Fv thermodynamic simulation accuracy.Therefore, according to a large number of known components of the petroleum fluid A new prediction model for capture pressure of petroleum inclusions is established, which is constrained by the molar content of methane. The only variable in the new model is the molar content of methane in petroleum inclusions and no longer depends on the special thermodynamic simulation software (PVTsim, VTflinc, PIT and FIT-OIL), which greatly simplifies the traditional petroleum inclusion capture pressure reconstruction process.Finally, the new model capture pressure prediction accuracy is evaluated, stone The molar content of methane in oil inclusion plays an important controlling role in the capture pressure reconstruction. The quantification of methane content in a single oil inclusion is the main research direction in the reconstruction of the pressure of capture of petroleum inclusions in the future.