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除实验室测定参数(Th,oil、Th,aqu和Fv)外,石油包裹体热动力学模拟古压力精度还极大地受控于石油组分模型、饱和压力预测以及气、液相摩尔体积的预测精度.在改进α-β组分模型前提下,利用微调组分和匹配饱和压力方法改进并验证了石油流体饱和压力预测精度;在匹配饱和压力与实验实测饱和压力前提下,利用体积转换方法匹配22组油藏流体391个常组分膨胀实验相对体积数据,从而改善了利用Peng-Robison状态方程计算油包裹体气泡充填度(20℃)和等容线的能力.最终评价了真实石油流体组分甲烷摩尔含量和等效石油流体组分甲烷摩尔含量两个组分模拟约束条件下,改进的热动力学模拟方法和PIT软件及Vtflinc软件重构捕获压力的精度.结果表明,改进的热动力学模拟古压力方法较其他两种方法可以有效地提高捕获压力预测的精度.考虑到石油包裹体甲烷摩尔含量难获取问题,利用改进后的方法结合等效流体组分约束条件是重构捕获压力的理想方法组合.
In addition to the laboratory parameters (Th, oil, Th, aqu, and Fv), the thermodynamic simulations of ancient inclusions in petroleum inclusions are strongly controlled by petroleum composition models, saturation pressure predictions, and the molar volumes of gas and liquid phases The accuracy of prediction of the oil fluid saturation pressure is improved and verified by using the fine tuning component and the matching saturation pressure method under the premise of improving the α-β component model; under the premise of matching the saturation pressure with the experimentally measured saturation pressure, the volume conversion method The relative volume data of 391 constant component expansion experiments of 22 reservoir fluids were matched to improve the ability of Peng-Robison equation of state to calculate the bubble filling degree (20 ℃) and the isotropic line of oil inclusion. Finally, the real petroleum fluid The molar fraction of methane and the molar fraction of methane in the equivalent petroleum fluid component under simulated restraint conditions, improved thermodynamic simulation method and PIT software and Vtflinc software to reconstruct the accuracy of capture pressure.The results show that the improved heat Compared with the other two methods, the dynamic simulation of the ancient pressure method can effectively improve the accuracy of the capture pressure prediction.Considering that it is difficult to obtain the molar content of methane in petroleum inclusions A method after the title, the improved binding equivalent fluid component constraint is reconstructed over the combined trapping pressure method.